xref: /illumos-gate/usr/src/lib/libzonecfg/common/libzonecfg.c (revision 2caf0dcd2abc26b477e317999994020212790d38)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <libsysevent.h>
#include <pthread.h>
#include <stdlib.h>
#include <errno.h>
#include <fnmatch.h>
#include <strings.h>
#include <unistd.h>
#include <sys/stat.h>
#include <assert.h>
#include <libgen.h>
#include <libintl.h>
#include <alloca.h>
#include <ctype.h>
#include <sys/mntio.h>
#include <sys/mnttab.h>
#include <sys/types.h>
#include <sys/nvpair.h>
#include <sys/acl.h>
#include <ftw.h>

#include <arpa/inet.h>
#include <netdb.h>

#include <priv.h>

#include <libxml/xmlmemory.h>
#include <libxml/parser.h>

#include <libdevinfo.h>
#include <uuid/uuid.h>

#include <dirent.h>

#include <libzonecfg.h>
#include "zonecfg_impl.h"


#define	_PATH_TMPFILE	"/zonecfg.XXXXXX"
#define	ZONE_CB_RETRY_COUNT		10
#define	ZONE_EVENT_PING_SUBCLASS	"ping"
#define	ZONE_EVENT_PING_PUBLISHER	"solaris"

/* Hard-code the DTD element/attribute/entity names just once, here. */
#define	DTD_ELEM_ATTR		(const xmlChar *) "attr"
#define	DTD_ELEM_COMMENT	(const xmlChar *) "comment"
#define	DTD_ELEM_DEVICE		(const xmlChar *) "device"
#define	DTD_ELEM_FS		(const xmlChar *) "filesystem"
#define	DTD_ELEM_FSOPTION	(const xmlChar *) "fsoption"
#define	DTD_ELEM_IPD		(const xmlChar *) "inherited-pkg-dir"
#define	DTD_ELEM_NET		(const xmlChar *) "network"
#define	DTD_ELEM_RCTL		(const xmlChar *) "rctl"
#define	DTD_ELEM_RCTLVALUE	(const xmlChar *) "rctl-value"
#define	DTD_ELEM_ZONE		(const xmlChar *) "zone"
#define	DTD_ELEM_DATASET	(const xmlChar *) "dataset"
#define	DTD_ELEM_PACKAGE	(const xmlChar *) "package"
#define	DTD_ELEM_PATCH		(const xmlChar *) "patch"
#define	DTD_ELEM_OBSOLETES	(const xmlChar *) "obsoletes"
#define	DTD_ELEM_INCOMPATIBLE	(const xmlChar *) "incompatible"
#define	DTD_ELEM_DEV_PERM	(const xmlChar *) "dev-perm"

#define	DTD_ATTR_ACTION		(const xmlChar *) "action"
#define	DTD_ATTR_ADDRESS	(const xmlChar *) "address"
#define	DTD_ATTR_AUTOBOOT	(const xmlChar *) "autoboot"
#define	DTD_ATTR_DIR		(const xmlChar *) "directory"
#define	DTD_ATTR_LIMIT		(const xmlChar *) "limit"
#define	DTD_ATTR_MATCH		(const xmlChar *) "match"
#define	DTD_ATTR_NAME		(const xmlChar *) "name"
#define	DTD_ATTR_PHYSICAL	(const xmlChar *) "physical"
#define	DTD_ATTR_POOL		(const xmlChar *) "pool"
#define	DTD_ATTR_PRIV		(const xmlChar *) "priv"
#define	DTD_ATTR_RAW		(const xmlChar *) "raw"
#define	DTD_ATTR_SPECIAL	(const xmlChar *) "special"
#define	DTD_ATTR_TYPE		(const xmlChar *) "type"
#define	DTD_ATTR_VALUE		(const xmlChar *) "value"
#define	DTD_ATTR_ZONEPATH	(const xmlChar *) "zonepath"
#define	DTD_ATTR_VERSION	(const xmlChar *) "version"
#define	DTD_ATTR_ID		(const xmlChar *) "id"
#define	DTD_ATTR_UID		(const xmlChar *) "uid"
#define	DTD_ATTR_GID		(const xmlChar *) "gid"
#define	DTD_ATTR_MODE		(const xmlChar *) "mode"
#define	DTD_ATTR_ACL		(const xmlChar *) "acl"

#define	DTD_ENTITY_BOOLEAN	"boolean"
#define	DTD_ENTITY_DEVPATH	"devpath"
#define	DTD_ENTITY_DRIVER	"driver"
#define	DTD_ENTITY_DRVMIN	"drv_min"
#define	DTD_ENTITY_FALSE	"false"
#define	DTD_ENTITY_INT		"int"
#define	DTD_ENTITY_STRING	"string"
#define	DTD_ENTITY_TRUE		"true"
#define	DTD_ENTITY_UINT		"uint"

#define	DTD_ENTITY_BOOL_LEN	6	/* "false" */

#define	DETACHED	"SUNWdetached.xml"
#define	ATTACH_FORCED	"SUNWattached.xml"
#define	PKG_PATH	"/var/sadm/pkg"
#define	CONTENTS_FILE	"/var/sadm/install/contents"
#define	ALL_ZONES	"SUNW_PKG_ALLZONES=true\n"
#define	THIS_ZONE	"SUNW_PKG_THISZONE=true\n"
#define	VERSION		"VERSION="
#define	PATCHLIST	"PATCHLIST="
#define	PATCHINFO	"PATCH_INFO_"
#define	PKGINFO_RD_LEN	128

struct zone_dochandle {
	char		*zone_dh_rootdir;
	xmlDocPtr	zone_dh_doc;
	xmlNodePtr	zone_dh_cur;
	xmlNodePtr	zone_dh_top;
	boolean_t	zone_dh_newzone;
	boolean_t	zone_dh_snapshot;
	boolean_t	zone_dh_sw_inv;
	char		zone_dh_delete_name[ZONENAME_MAX];
};

struct znotify {
	void * zn_private;
	evchan_t *zn_eventchan;
	int (*zn_callback)(const  char *zonename, zoneid_t zid,
	    const char *newstate, const char *oldstate, hrtime_t when, void *p);
	pthread_mutex_t zn_mutex;
	pthread_cond_t zn_cond;
	pthread_mutex_t zn_bigmutex;
	volatile enum {ZN_UNLOCKED, ZN_LOCKED, ZN_PING_INFLIGHT,
	    ZN_PING_RECEIVED} zn_state;
	char zn_subscriber_id[MAX_SUBID_LEN];
	volatile boolean_t zn_failed;
	int zn_failure_count;
};

struct zone_pkginfo {
	boolean_t	zpi_all_zones;
	boolean_t	zpi_this_zone;
	int		zpi_patch_cnt;
	char		*zpi_version;
	char		**zpi_patchinfo;
};

char *zonecfg_root = "";

/*
 * For functions which return int, which is most of the functions herein,
 * the return values should be from the Z_foo set defined in <libzonecfg.h>.
 * In some instances, we take pains mapping some libc errno values to Z_foo
 * values from this set.
 */

/*
 * Set the root (/) path for all zonecfg configuration files.  This is a
 * private interface used by Live Upgrade extensions to access zone
 * configuration inside mounted alternate boot environments.
 */
void
zonecfg_set_root(const char *rootpath)
{
	if (*zonecfg_root != '\0')
		free(zonecfg_root);
	if (rootpath == NULL || rootpath[0] == '\0' || rootpath[1] == '\0' ||
	    (zonecfg_root = strdup(rootpath)) == NULL)
		zonecfg_root = "";
}

const char *
zonecfg_get_root(void)
{
	return (zonecfg_root);
}

boolean_t
zonecfg_in_alt_root(void)
{
	return (*zonecfg_root != '\0');
}

/*
 * Callers of the _file_path() functions are expected to have the second
 * parameter be a (char foo[MAXPATHLEN]).
 */

static boolean_t
config_file_path(const char *zonename, char *answer)
{
	return (snprintf(answer, MAXPATHLEN, "%s%s/%s.xml", zonecfg_root,
	    ZONE_CONFIG_ROOT, zonename) < MAXPATHLEN);
}

static boolean_t
snap_file_path(const char *zonename, char *answer)
{
	return (snprintf(answer, MAXPATHLEN, "%s%s/%s.snapshot.xml",
	    zonecfg_root, ZONE_SNAPSHOT_ROOT, zonename) < MAXPATHLEN);
}

/*ARGSUSED*/
static void
zonecfg_error_func(void *ctx, const char *msg, ...)
{
	/*
	 * This function does nothing by design.  Its purpose is to prevent
	 * libxml from dumping unwanted messages to stdout/stderr.
	 */
}

zone_dochandle_t
zonecfg_init_handle(void)
{
	zone_dochandle_t handle = calloc(1, sizeof (struct zone_dochandle));
	if (handle == NULL) {
		errno = Z_NOMEM;
		return (NULL);
	}

	/* generic libxml initialization */
	xmlLineNumbersDefault(1);
	xmlLoadExtDtdDefaultValue |= XML_DETECT_IDS;
	xmlDoValidityCheckingDefaultValue = 1;
	(void) xmlKeepBlanksDefault(0);
	xmlGetWarningsDefaultValue = 0;
	xmlSetGenericErrorFunc(NULL, zonecfg_error_func);

	return (handle);
}

int
zonecfg_check_handle(zone_dochandle_t handle)
{
	if (handle == NULL || handle->zone_dh_doc == NULL)
		return (Z_BAD_HANDLE);
	return (Z_OK);
}

void
zonecfg_fini_handle(zone_dochandle_t handle)
{
	if (zonecfg_check_handle(handle) == Z_OK)
		xmlFreeDoc(handle->zone_dh_doc);
	if (handle != NULL)
		free(handle);
}

static int
zonecfg_destroy_impl(char *filename)
{
	if (unlink(filename) == -1) {
		if (errno == EACCES)
			return (Z_ACCES);
		if (errno == ENOENT)
			return (Z_NO_ZONE);
		return (Z_MISC_FS);
	}
	return (Z_OK);
}

int
zonecfg_destroy(const char *zonename, boolean_t force)
{
	char path[MAXPATHLEN];
	struct zoneent ze;
	int err, state_err;
	zone_state_t state;

	if (!config_file_path(zonename, path))
		return (Z_MISC_FS);

	state_err = zone_get_state((char *)zonename, &state);
	err = access(path, W_OK);

	/*
	 * If there is no file, and no index entry, reliably indicate that no
	 * such zone exists.
	 */
	if ((state_err == Z_NO_ZONE) && (err == -1) && (errno == ENOENT))
		return (Z_NO_ZONE);

	/*
	 * Handle any other filesystem related errors (except if the XML
	 * file is missing, which we treat silently), unless we're forcing,
	 * in which case we plow on.
	 */
	if (err == -1 && errno != ENOENT) {
		if (errno == EACCES)
			return (Z_ACCES);
		else if (!force)
			return (Z_MISC_FS);
	}

	if (state > ZONE_STATE_INSTALLED)
		return (Z_BAD_ZONE_STATE);

	if (!force && state > ZONE_STATE_CONFIGURED)
		return (Z_BAD_ZONE_STATE);

	/*
	 * Index deletion succeeds even if the entry doesn't exist.  So this
	 * will fail only if we've had some more severe problem.
	 */
	bzero(&ze, sizeof (ze));
	(void) strlcpy(ze.zone_name, zonename, sizeof (ze.zone_name));
	if ((err = putzoneent(&ze, PZE_REMOVE)) != Z_OK)
		if (!force)
			return (err);

	err = zonecfg_destroy_impl(path);

	/*
	 * Treat failure to find the XML file silently, since, well, it's
	 * gone, and with the index file cleaned up, we're done.
	 */
	if (err == Z_OK || err == Z_NO_ZONE)
		return (Z_OK);
	return (err);
}

int
zonecfg_destroy_snapshot(const char *zonename)
{
	char path[MAXPATHLEN];

	if (!snap_file_path(zonename, path))
		return (Z_MISC_FS);
	return (zonecfg_destroy_impl(path));
}

static int
getroot(zone_dochandle_t handle, xmlNodePtr *root)
{
	if (zonecfg_check_handle(handle) == Z_BAD_HANDLE)
		return (Z_BAD_HANDLE);

	*root = xmlDocGetRootElement(handle->zone_dh_doc);

	if (*root == NULL)
		return (Z_EMPTY_DOCUMENT);

	if (xmlStrcmp((*root)->name, DTD_ELEM_ZONE))
		return (Z_WRONG_DOC_TYPE);

	return (Z_OK);
}

static int
operation_prep(zone_dochandle_t handle)
{
	xmlNodePtr root;
	int err;

	if ((err = getroot(handle, &root)) != 0)
		return (err);

	handle->zone_dh_cur = root;
	handle->zone_dh_top = root;
	return (Z_OK);
}

static int
getrootattr(zone_dochandle_t handle, const xmlChar *propname,
    char *propval, size_t propsize)
{
	xmlNodePtr root;
	xmlChar *property;
	size_t srcsize;
	int err;

	if ((err = getroot(handle, &root)) != 0)
		return (err);

	if ((property = xmlGetProp(root, propname)) == NULL)
		return (Z_BAD_PROPERTY);
	srcsize = strlcpy(propval, (char *)property, propsize);
	xmlFree(property);
	if (srcsize >= propsize)
		return (Z_TOO_BIG);
	return (Z_OK);
}

static int
setrootattr(zone_dochandle_t handle, const xmlChar *propname,
    const char *propval)
{
	int err;
	xmlNodePtr root;

	if (propval == NULL)
		return (Z_INVAL);

	if ((err = getroot(handle, &root)) != Z_OK)
		return (err);

	if (xmlSetProp(root, propname, (const xmlChar *) propval) == NULL)
		return (Z_INVAL);
	return (Z_OK);
}

static void
addcomment(zone_dochandle_t handle, const char *comment)
{
	xmlNodePtr node;
	node = xmlNewComment((xmlChar *) comment);

	if (node != NULL)
		(void) xmlAddPrevSibling(handle->zone_dh_top, node);
}

static void
stripcomments(zone_dochandle_t handle)
{
	xmlDocPtr top;
	xmlNodePtr child, next;

	top = handle->zone_dh_doc;
	for (child = top->xmlChildrenNode; child != NULL; child = next) {
		next = child->next;
		if (child->name == NULL)
			continue;
		if (xmlStrcmp(child->name, DTD_ELEM_COMMENT) == 0) {
			next = child->next;
			xmlUnlinkNode(child);
			xmlFreeNode(child);
		}
	}
}

static void
strip_sw_inv(zone_dochandle_t handle)
{
	xmlNodePtr root, child, next;

	root = xmlDocGetRootElement(handle->zone_dh_doc);
	for (child = root->xmlChildrenNode; child != NULL; child = next) {
		next = child->next;
		if (child->name == NULL)
			continue;
		if (xmlStrcmp(child->name, DTD_ELEM_PACKAGE) == 0 ||
		    xmlStrcmp(child->name, DTD_ELEM_PATCH) == 0) {
			next = child->next;
			xmlUnlinkNode(child);
			xmlFreeNode(child);
		}
	}
}

static int
zonecfg_get_handle_impl(const char *zonename, const char *filename,
    zone_dochandle_t handle)
{
	xmlValidCtxtPtr cvp;
	struct stat statbuf;
	int valid;

	if (zonename == NULL)
		return (Z_NO_ZONE);
	if ((handle->zone_dh_doc = xmlParseFile(filename)) == NULL) {
		/* distinguish file not found vs. found but not parsed */
		if (stat(filename, &statbuf) == 0)
			return (Z_INVALID_DOCUMENT);
		return (Z_NO_ZONE);
	}
	if ((cvp = xmlNewValidCtxt()) == NULL)
		return (Z_NOMEM);
	cvp->error = zonecfg_error_func;
	cvp->warning = zonecfg_error_func;
	valid = xmlValidateDocument(cvp, handle->zone_dh_doc);
	xmlFreeValidCtxt(cvp);
	if (valid == 0)
		return (Z_INVALID_DOCUMENT);

	/* delete any comments such as inherited Sun copyright / ident str */
	stripcomments(handle);
	return (Z_OK);
}

int
zonecfg_get_handle(const char *zonename, zone_dochandle_t handle)
{
	char path[MAXPATHLEN];

	if (!config_file_path(zonename, path))
		return (Z_MISC_FS);
	handle->zone_dh_newzone = B_FALSE;

	return (zonecfg_get_handle_impl(zonename, path, handle));
}

int
zonecfg_get_attach_handle(const char *path, const char *zonename,
    boolean_t preserve_sw, zone_dochandle_t handle)
{
	char		migpath[MAXPATHLEN];
	int		err;
	struct stat	buf;

	if (snprintf(migpath, sizeof (migpath), "%s/root", path) >=
	    sizeof (migpath))
		return (Z_NOMEM);

	if (stat(migpath, &buf) == -1 || !S_ISDIR(buf.st_mode))
		return (Z_NO_ZONE);

	if (snprintf(migpath, sizeof (migpath), "%s/%s", path, DETACHED) >=
	    sizeof (migpath))
		return (Z_NOMEM);

	if ((err = zonecfg_get_handle_impl(zonename, migpath, handle)) != Z_OK)
		return (err);

	if (!preserve_sw)
		strip_sw_inv(handle);

	handle->zone_dh_newzone = B_TRUE;
	if ((err = setrootattr(handle, DTD_ATTR_ZONEPATH, path)) != Z_OK)
		return (err);

	return (setrootattr(handle, DTD_ATTR_NAME, zonename));
}

int
zonecfg_get_snapshot_handle(const char *zonename, zone_dochandle_t handle)
{
	char path[MAXPATHLEN];

	if (!snap_file_path(zonename, path))
		return (Z_MISC_FS);
	handle->zone_dh_newzone = B_FALSE;
	return (zonecfg_get_handle_impl(zonename, path, handle));
}

int
zonecfg_get_template_handle(const char *template, const char *zonename,
    zone_dochandle_t handle)
{
	char path[MAXPATHLEN];
	int err;

	if (!config_file_path(template, path))
		return (Z_MISC_FS);

	if ((err = zonecfg_get_handle_impl(template, path, handle)) != Z_OK)
		return (err);
	handle->zone_dh_newzone = B_TRUE;
	return (setrootattr(handle, DTD_ATTR_NAME, zonename));
}

static boolean_t
is_renaming(zone_dochandle_t handle)
{
	if (handle->zone_dh_newzone)
		return (B_FALSE);
	if (strlen(handle->zone_dh_delete_name) > 0)
		return (B_TRUE);
	return (B_FALSE);
}

static boolean_t
is_new(zone_dochandle_t handle)
{
	return (handle->zone_dh_newzone || handle->zone_dh_snapshot);
}

static boolean_t
is_snapshot(zone_dochandle_t handle)
{
	return (handle->zone_dh_snapshot);
}

/*
 * It would be great to be able to use libc's ctype(3c) macros, but we
 * can't, as they are locale sensitive, and it would break our limited thread
 * safety if this routine had to change the app locale on the fly.
 */
int
zonecfg_validate_zonename(const char *zone)
{
	int i;

	if (strcmp(zone, GLOBAL_ZONENAME) == 0)
		return (Z_BOGUS_ZONE_NAME);

	if (strlen(zone) >= ZONENAME_MAX)
		return (Z_BOGUS_ZONE_NAME);

	if (!((zone[0] >= 'a' && zone[0] <= 'z') ||
	    (zone[0] >= 'A' && zone[0] <= 'Z') ||
	    (zone[0] >= '0' && zone[0] <= '9')))
		return (Z_BOGUS_ZONE_NAME);

	for (i = 1; zone[i] != '\0'; i++) {
		if (!((zone[i] >= 'a' && zone[i] <= 'z') ||
		    (zone[i] >= 'A' && zone[i] <= 'Z') ||
		    (zone[i] >= '0' && zone[i] <= '9') ||
		    (zone[i] == '-') || (zone[i] == '_') || (zone[i] == '.')))
			return (Z_BOGUS_ZONE_NAME);
	}

	return (Z_OK);
}

/*
 * Changing the zone name requires us to track both the old and new
 * name of the zone until commit time.
 */
int
zonecfg_get_name(zone_dochandle_t handle, char *name, size_t namesize)
{
	return (getrootattr(handle, DTD_ATTR_NAME, name, namesize));
}

int
zonecfg_set_name(zone_dochandle_t handle, char *name)
{
	zone_state_t state;
	char curname[ZONENAME_MAX], old_delname[ZONENAME_MAX];
	int err;

	if ((err = getrootattr(handle, DTD_ATTR_NAME, curname,
	    sizeof (curname))) != Z_OK)
		return (err);

	if (strcmp(name, curname) == 0)
		return (Z_OK);

	/*
	 * Switching zone names to one beginning with SUNW is not permitted.
	 */
	if (strncmp(name, "SUNW", 4) == 0)
		return (Z_BOGUS_ZONE_NAME);

	if ((err = zonecfg_validate_zonename(name)) != Z_OK)
		return (err);

	/*
	 * Setting the name back to the original name (effectively a revert of
	 * the name) is fine.  But if we carry on, we'll falsely identify the
	 * name as "in use," so special case here.
	 */
	if (strcmp(name, handle->zone_dh_delete_name) == 0) {
		err = setrootattr(handle, DTD_ATTR_NAME, name);
		handle->zone_dh_delete_name[0] = '\0';
		return (err);
	}

	/* Check to see if new name chosen is already in use */
	if (zone_get_state(name, &state) != Z_NO_ZONE)
		return (Z_NAME_IN_USE);

	/*
	 * If this isn't already "new" or in a renaming transition, then
	 * we're initiating a rename here; so stash the "delete name"
	 * (i.e. the name of the zone we'll be removing) for the rename.
	 */
	(void) strlcpy(old_delname, handle->zone_dh_delete_name,
	    sizeof (old_delname));
	if (!is_new(handle) && !is_renaming(handle)) {
		/*
		 * Name change is allowed only when the zone we're altering
		 * is not ready or running.
		 */
		err = zone_get_state(curname, &state);
		if (err == Z_OK) {
			if (state > ZONE_STATE_INSTALLED)
				return (Z_BAD_ZONE_STATE);
		} else if (err != Z_NO_ZONE) {
			return (err);
		}

		(void) strlcpy(handle->zone_dh_delete_name, curname,
		    sizeof (handle->zone_dh_delete_name));
		assert(is_renaming(handle));
	} else if (is_renaming(handle)) {
		err = zone_get_state(handle->zone_dh_delete_name, &state);
		if (err == Z_OK) {
			if (state > ZONE_STATE_INSTALLED)
				return (Z_BAD_ZONE_STATE);
		} else if (err != Z_NO_ZONE) {
			return (err);
		}
	}

	if ((err = setrootattr(handle, DTD_ATTR_NAME, name)) != Z_OK) {
		/*
		 * Restore the deletename to whatever it was at the
		 * top of the routine, since we've had a failure.
		 */
		(void) strlcpy(handle->zone_dh_delete_name, old_delname,
		    sizeof (handle->zone_dh_delete_name));
		return (err);
	}

	return (Z_OK);
}

int
zonecfg_get_zonepath(zone_dochandle_t handle, char *path, size_t pathsize)
{
	size_t len;

	if ((len = strlcpy(path, zonecfg_root, pathsize)) >= pathsize)
		return (Z_TOO_BIG);
	return (getrootattr(handle, DTD_ATTR_ZONEPATH, path + len,
	    pathsize - len));
}

int
zonecfg_set_zonepath(zone_dochandle_t handle, char *zonepath)
{
	return (setrootattr(handle, DTD_ATTR_ZONEPATH, zonepath));
}

int
zonecfg_get_autoboot(zone_dochandle_t handle, boolean_t *autoboot)
{
	char autobootstr[DTD_ENTITY_BOOL_LEN];
	int ret;

	if ((ret = getrootattr(handle, DTD_ATTR_AUTOBOOT, autobootstr,
	    sizeof (autobootstr))) != Z_OK)
		return (ret);

	if (strcmp(autobootstr, DTD_ENTITY_TRUE) == 0)
		*autoboot = B_TRUE;
	else if (strcmp(autobootstr, DTD_ENTITY_FALSE) == 0)
		*autoboot = B_FALSE;
	else
		ret = Z_BAD_PROPERTY;
	return (ret);
}

int
zonecfg_set_autoboot(zone_dochandle_t handle, boolean_t autoboot)
{
	return (setrootattr(handle, DTD_ATTR_AUTOBOOT,
	    autoboot ? DTD_ENTITY_TRUE : DTD_ENTITY_FALSE));
}

int
zonecfg_get_pool(zone_dochandle_t handle, char *pool, size_t poolsize)
{
	return (getrootattr(handle, DTD_ATTR_POOL, pool, poolsize));
}

int
zonecfg_set_pool(zone_dochandle_t handle, char *pool)
{
	return (setrootattr(handle, DTD_ATTR_POOL, pool));
}

/*
 * /etc/zones/index caches a vital piece of information which is also
 * in the <zonename>.xml file: the path to the zone.  This is for performance,
 * since we need to walk all zonepath's in order to be able to detect conflicts
 * (see crosscheck_zonepaths() in the zoneadm command).
 *
 * An additional complexity is that when doing a rename, we'd like the entire
 * index update operation (rename, and potential state changes) to be atomic.
 * In general, the operation of this function should succeed or fail as
 * a unit.
 */
int
zonecfg_refresh_index_file(zone_dochandle_t handle)
{
	char name[ZONENAME_MAX], zonepath[MAXPATHLEN];
	struct zoneent ze;
	int err;
	int opcode;
	char *zn;

	bzero(&ze, sizeof (ze));
	ze.zone_state = -1;	/* Preserve existing state in index */

	if ((err = zonecfg_get_name(handle, name, sizeof (name))) != Z_OK)
		return (err);
	(void) strlcpy(ze.zone_name, name, sizeof (ze.zone_name));

	if ((err = zonecfg_get_zonepath(handle, zonepath,
	    sizeof (zonepath))) != Z_OK)
		return (err);
	(void) strlcpy(ze.zone_path, zonepath, sizeof (ze.zone_path));

	if (is_renaming(handle)) {
		opcode = PZE_MODIFY;
		(void) strlcpy(ze.zone_name, handle->zone_dh_delete_name,
		    sizeof (ze.zone_name));
		(void) strlcpy(ze.zone_newname, name, sizeof (ze.zone_newname));
	} else if (is_new(handle)) {
		FILE *cookie;
		/*
		 * Be tolerant of the zone already existing in the index file,
		 * since we might be forcibly overwriting an existing
		 * configuration with a new one (for example 'create -F'
		 * in zonecfg).
		 */
		opcode = PZE_ADD;
		cookie = setzoneent();
		while ((zn = getzoneent(cookie)) != NULL) {
			if (strcmp(zn, name) == 0) {
				opcode = PZE_MODIFY;
				free(zn);
				break;
			}
			free(zn);
		}
		endzoneent(cookie);
		ze.zone_state = ZONE_STATE_CONFIGURED;
	} else {
		opcode = PZE_MODIFY;
	}

	if ((err = putzoneent(&ze, opcode)) != Z_OK)
		return (err);

	return (Z_OK);
}

/*
 * The goal of this routine is to cause the index file update and the
 * document save to happen as an atomic operation.  We do the document
 * first, saving a backup copy using a hard link; if that succeeds, we go
 * on to the index.  If that fails, we roll the document back into place.
 *
 * Strategy:
 *
 * New zone 'foo' configuration:
 * 	Create tmpfile (zonecfg.xxxxxx)
 * 	Write XML to tmpfile
 * 	Rename tmpfile to xmlfile (zonecfg.xxxxxx -> foo.xml)
 * 	Add entry to index file
 * 	If it fails, delete foo.xml, leaving nothing behind.
 *
 * Save existing zone 'foo':
 * 	Make backup of foo.xml -> .backup
 * 	Create tmpfile (zonecfg.xxxxxx)
 * 	Write XML to tmpfile
 * 	Rename tmpfile to xmlfile (zonecfg.xxxxxx -> foo.xml)
 * 	Modify index file as needed
 * 	If it fails, recover from .backup -> foo.xml
 *
 * Rename 'foo' to 'bar':
 * 	Create tmpfile (zonecfg.xxxxxx)
 * 	Write XML to tmpfile
 * 	Rename tmpfile to xmlfile (zonecfg.xxxxxx -> bar.xml)
 * 	Add entry for 'bar' to index file, Remove entry for 'foo' (refresh)
 * 	If it fails, delete bar.xml; foo.xml is left behind.
 */
static int
zonecfg_save_impl(zone_dochandle_t handle, char *filename)
{
	char tmpfile[MAXPATHLEN];
	char bakdir[MAXPATHLEN], bakbase[MAXPATHLEN], bakfile[MAXPATHLEN];
	int tmpfd, err;
	xmlValidCtxt cvp = { NULL };
	boolean_t backup;

	(void) strlcpy(tmpfile, filename, sizeof (tmpfile));
	(void) dirname(tmpfile);
	(void) strlcat(tmpfile, _PATH_TMPFILE, sizeof (tmpfile));

	tmpfd = mkstemp(tmpfile);
	if (tmpfd == -1) {
		(void) unlink(tmpfile);
		return (Z_TEMP_FILE);
	}
	(void) close(tmpfd);

	cvp.error = zonecfg_error_func;
	cvp.warning = zonecfg_error_func;

	/*
	 * We do a final validation of the document-- but the library has
	 * malfunctioned if it fails to validate, so it's an assert.
	 */
	assert(xmlValidateDocument(&cvp, handle->zone_dh_doc) != 0);

	if (xmlSaveFormatFile(tmpfile, handle->zone_dh_doc, 1) <= 0)
		goto err;

	(void) chmod(tmpfile, 0644);

	/*
	 * In the event we are doing a standard save, hard link a copy of the
	 * original file in .backup.<pid>.filename so we can restore it if
	 * something goes wrong.
	 */
	if (!is_new(handle) && !is_renaming(handle)) {
		backup = B_TRUE;

		(void) strlcpy(bakdir, filename, sizeof (bakdir));
		(void) strlcpy(bakbase, filename, sizeof (bakbase));
		(void) snprintf(bakfile, sizeof (bakfile), "%s/.backup.%d.%s",
		    dirname(bakdir), getpid(), basename(bakbase));

		if (link(filename, bakfile) == -1) {
			err = errno;
			(void) unlink(tmpfile);
			if (errno == EACCES)
				return (Z_ACCES);
			return (Z_MISC_FS);
		}
	}

	/*
	 * Move the new document over top of the old.
	 * i.e.:   zonecfg.XXXXXX  ->  myzone.xml
	 */
	if (rename(tmpfile, filename) == -1) {
		err = errno;
		(void) unlink(tmpfile);
		if (backup)
			(void) unlink(bakfile);
		if (err == EACCES)
			return (Z_ACCES);
		return (Z_MISC_FS);
	}

	/*
	 * If this is a snapshot, we're done-- don't add an index entry.
	 */
	if (is_snapshot(handle))
		return (Z_OK);

	/* now update the index file to reflect whatever we just did */
	if ((err = zonecfg_refresh_index_file(handle)) != Z_OK) {
		if (backup) {
			/*
			 * Try to restore from our backup.
			 */
			(void) unlink(filename);
			(void) rename(bakfile, filename);
		} else {
			/*
			 * Either the zone is new, in which case we can delete
			 * new.xml, or we're doing a rename, so ditto.
			 */
			assert(is_new(handle) || is_renaming(handle));
			(void) unlink(filename);
		}
		return (Z_UPDATING_INDEX);
	}

	if (backup)
		(void) unlink(bakfile);

	return (Z_OK);

err:
	(void) unlink(tmpfile);
	return (Z_SAVING_FILE);
}

int
zonecfg_save(zone_dochandle_t handle)
{
	char zname[ZONENAME_MAX], path[MAXPATHLEN];
	char delpath[MAXPATHLEN];
	int err = Z_SAVING_FILE;

	if (zonecfg_check_handle(handle) != Z_OK)
		return (Z_BAD_HANDLE);

	/*
	 * We don't support saving snapshots or a tree containing a sw
	 * inventory at this time.
	 */
	if (handle->zone_dh_snapshot || handle->zone_dh_sw_inv)
		return (Z_INVAL);

	if ((err = zonecfg_get_name(handle, zname, sizeof (zname))) != Z_OK)
		return (err);

	if (!config_file_path(zname, path))
		return (Z_MISC_FS);

	addcomment(handle, "\n    DO NOT EDIT THIS "
	    "FILE.  Use zonecfg(1M) instead.\n");

	err = zonecfg_save_impl(handle, path);

	stripcomments(handle);

	if (err != Z_OK)
		return (err);

	handle->zone_dh_newzone = B_FALSE;

	if (is_renaming(handle)) {
		if (config_file_path(handle->zone_dh_delete_name, delpath))
			(void) unlink(delpath);
		handle->zone_dh_delete_name[0] = '\0';
	}

	return (Z_OK);
}

int
zonecfg_detach_save(zone_dochandle_t handle)
{
	char zname[ZONENAME_MAX];
	char path[MAXPATHLEN];
	char migpath[MAXPATHLEN];
	xmlValidCtxt cvp = { NULL };
	int err = Z_SAVING_FILE;

	if (zonecfg_check_handle(handle) != Z_OK)
		return (Z_BAD_HANDLE);

	/*
	 * We can only detach if we have taken a sw inventory.
	 */
	if (!handle->zone_dh_sw_inv)
		return (Z_INVAL);

	if ((err = zonecfg_get_name(handle, zname, sizeof (zname))) != Z_OK)
		return (err);

	if ((err = zone_get_zonepath(zname, path, sizeof (path))) != Z_OK)
		return (err);

	if (snprintf(migpath, sizeof (migpath), "%s/%s", path, DETACHED) >=
	    sizeof (migpath))
		return (Z_NOMEM);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	addcomment(handle, "\n    DO NOT EDIT THIS FILE.  "
	    "Use zonecfg(1M) and zoneadm(1M) attach.\n");

	cvp.error = zonecfg_error_func;
	cvp.warning = zonecfg_error_func;

	/*
	 * We do a final validation of the document-- but the library has
	 * malfunctioned if it fails to validate, so it's an assert.
	 */
	assert(xmlValidateDocument(&cvp, handle->zone_dh_doc) != 0);

	if (xmlSaveFormatFile(migpath, handle->zone_dh_doc, 1) <= 0)
		return (Z_SAVING_FILE);

	(void) chmod(migpath, 0644);

	stripcomments(handle);

	handle->zone_dh_newzone = B_FALSE;

	return (Z_OK);
}

boolean_t
zonecfg_detached(const char *path)
{
	char		migpath[MAXPATHLEN];
	struct stat	buf;

	if (snprintf(migpath, sizeof (migpath), "%s/%s", path, DETACHED) >=
	    sizeof (migpath))
		return (B_FALSE);

	if (stat(migpath, &buf) != -1)
		return (B_TRUE);

	return (B_FALSE);
}

void
zonecfg_rm_detached(zone_dochandle_t handle, boolean_t forced)
{
	char zname[ZONENAME_MAX];
	char path[MAXPATHLEN];
	char detached[MAXPATHLEN];
	char attached[MAXPATHLEN];

	if (zonecfg_check_handle(handle) != Z_OK)
		return;

	if (zonecfg_get_name(handle, zname, sizeof (zname)) != Z_OK)
		return;

	if (zone_get_zonepath(zname, path, sizeof (path)) != Z_OK)
		return;

	(void) snprintf(detached, sizeof (detached), "%s/%s", path, DETACHED);
	(void) snprintf(attached, sizeof (attached), "%s/%s", path,
	    ATTACH_FORCED);

	if (forced) {
		(void) rename(detached, attached);
	} else {
		(void) unlink(attached);
		(void) unlink(detached);
	}
}

/*
 * Special case: if access(2) fails with ENOENT, then try again using
 * ZONE_CONFIG_ROOT instead of config_file_path(zonename).  This is how we
 * work around the case of a config file which has not been created yet:
 * the user will need access to the directory so use that as a heuristic.
 */

int
zonecfg_access(const char *zonename, int amode)
{
	char path[MAXPATHLEN];

	if (!config_file_path(zonename, path))
		return (Z_INVAL);
	if (access(path, amode) == 0)
		return (Z_OK);
	if (errno == ENOENT) {
		if (snprintf(path, sizeof (path), "%s%s", zonecfg_root,
		    ZONE_CONFIG_ROOT) >= sizeof (path))
			return (Z_INVAL);
		if (access(path, amode) == 0)
			return (Z_OK);
	}
	if (errno == EACCES)
		return (Z_ACCES);
	if (errno == EINVAL)
		return (Z_INVAL);
	return (Z_MISC_FS);
}

int
zonecfg_create_snapshot(const char *zonename)
{
	zone_dochandle_t handle;
	char path[MAXPATHLEN], zonepath[MAXPATHLEN], rpath[MAXPATHLEN];
	int error = Z_OK, res;

	if ((handle = zonecfg_init_handle()) == NULL) {
		return (Z_NOMEM);
	}

	handle->zone_dh_newzone = B_TRUE;
	handle->zone_dh_snapshot = B_TRUE;

	if ((error = zonecfg_get_handle(zonename, handle)) != Z_OK)
		goto out;
	if ((error = operation_prep(handle)) != Z_OK)
		goto out;
	error = zonecfg_get_zonepath(handle, zonepath, sizeof (zonepath));
	if (error != Z_OK)
		goto out;
	if ((res = resolvepath(zonepath, rpath, sizeof (rpath))) == -1) {
		error = Z_RESOLVED_PATH;
		goto out;
	}
	/*
	 * If the resolved path is not the same as the original path, then
	 * save the resolved path in the snapshot, thus preventing any
	 * potential problems down the line when zoneadmd goes to unmount
	 * file systems and depends on initial string matches with resolved
	 * paths.
	 */
	rpath[res] = '\0';
	if (strcmp(zonepath, rpath) != 0) {
		if ((error = zonecfg_set_zonepath(handle, rpath)) != Z_OK)
			goto out;
	}
	if (snprintf(path, sizeof (path), "%s%s", zonecfg_root,
	    ZONE_SNAPSHOT_ROOT) >= sizeof (path)) {
		error = Z_MISC_FS;
		goto out;
	}
	if ((mkdir(path, S_IRWXU) == -1) && (errno != EEXIST)) {
		error = Z_MISC_FS;
		goto out;
	}

	if (!snap_file_path(zonename, path)) {
		error = Z_MISC_FS;
		goto out;
	}

	addcomment(handle, "\n    DO NOT EDIT THIS FILE.  "
	    "It is a snapshot of running zone state.\n");

	error = zonecfg_save_impl(handle, path);

	stripcomments(handle);

out:
	zonecfg_fini_handle(handle);
	return (error);
}

static int
newprop(xmlNodePtr node, const xmlChar *attrname, char *src)
{
	xmlAttrPtr newattr;

	newattr = xmlNewProp(node, attrname, (xmlChar *)src);
	if (newattr == NULL) {
		xmlUnlinkNode(node);
		xmlFreeNode(node);
		return (Z_BAD_PROPERTY);
	}
	return (Z_OK);
}

static int
zonecfg_add_filesystem_core(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	xmlNodePtr newnode, cur = handle->zone_dh_cur, options_node;
	zone_fsopt_t *ptr;
	int err;

	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_FS, NULL);
	if ((err = newprop(newnode, DTD_ATTR_SPECIAL,
	    tabptr->zone_fs_special)) != Z_OK)
		return (err);
	if (tabptr->zone_fs_raw[0] != '\0' &&
	    (err = newprop(newnode, DTD_ATTR_RAW, tabptr->zone_fs_raw)) != Z_OK)
		return (err);
	if ((err = newprop(newnode, DTD_ATTR_DIR, tabptr->zone_fs_dir)) != Z_OK)
		return (err);
	if ((err = newprop(newnode, DTD_ATTR_TYPE,
	    tabptr->zone_fs_type)) != Z_OK)
		return (err);
	if (tabptr->zone_fs_options != NULL) {
		for (ptr = tabptr->zone_fs_options; ptr != NULL;
		    ptr = ptr->zone_fsopt_next) {
			options_node = xmlNewTextChild(newnode, NULL,
			    DTD_ELEM_FSOPTION, NULL);
			if ((err = newprop(options_node, DTD_ATTR_NAME,
			    ptr->zone_fsopt_opt)) != Z_OK)
				return (err);
		}
	}
	return (Z_OK);
}

int
zonecfg_add_filesystem(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_filesystem_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_add_ipd_core(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	xmlNodePtr newnode, cur = handle->zone_dh_cur;
	int err;

	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_IPD, NULL);
	if ((err = newprop(newnode, DTD_ATTR_DIR, tabptr->zone_fs_dir)) != Z_OK)
		return (err);
	return (Z_OK);
}

int
zonecfg_add_ipd(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_ipd_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_add_fs_option(struct zone_fstab *tabptr, char *option)
{
	zone_fsopt_t *last, *old, *new;

	last = tabptr->zone_fs_options;
	for (old = last; old != NULL; old = old->zone_fsopt_next)
		last = old;	/* walk to the end of the list */
	new = (zone_fsopt_t *)malloc(sizeof (zone_fsopt_t));
	if (new == NULL)
		return (Z_NOMEM);
	(void) strlcpy(new->zone_fsopt_opt, option,
	    sizeof (new->zone_fsopt_opt));
	new->zone_fsopt_next = NULL;
	if (last == NULL)
		tabptr->zone_fs_options = new;
	else
		last->zone_fsopt_next = new;
	return (Z_OK);
}

int
zonecfg_remove_fs_option(struct zone_fstab *tabptr, char *option)
{
	zone_fsopt_t *last, *this, *next;

	last = tabptr->zone_fs_options;
	for (this = last; this != NULL; this = this->zone_fsopt_next) {
		if (strcmp(this->zone_fsopt_opt, option) == 0) {
			next = this->zone_fsopt_next;
			if (this == tabptr->zone_fs_options)
				tabptr->zone_fs_options = next;
			else
				last->zone_fsopt_next = next;
			free(this);
			return (Z_OK);
		} else
			last = this;
	}
	return (Z_NO_PROPERTY_ID);
}

void
zonecfg_free_fs_option_list(zone_fsopt_t *list)
{
	zone_fsopt_t *this, *next;

	for (this = list; this != NULL; this = next) {
		next = this->zone_fsopt_next;
		free(this);
	}
}

void
zonecfg_free_rctl_value_list(struct zone_rctlvaltab *valtab)
{
	if (valtab == NULL)
		return;
	zonecfg_free_rctl_value_list(valtab->zone_rctlval_next);
	free(valtab);
}

static boolean_t
match_prop(xmlNodePtr cur, const xmlChar *attr, char *user_prop)
{
	xmlChar *gotten_prop;
	int prop_result;

	gotten_prop = xmlGetProp(cur, attr);
	if (gotten_prop == NULL)	/* shouldn't happen */
		return (B_FALSE);
	prop_result = xmlStrcmp(gotten_prop, (const xmlChar *) user_prop);
	xmlFree(gotten_prop);
	return ((prop_result == 0));
}

static int
zonecfg_delete_filesystem_core(zone_dochandle_t handle,
    struct zone_fstab *tabptr)
{
	xmlNodePtr cur = handle->zone_dh_cur;
	boolean_t dir_match, spec_match, raw_match, type_match;

	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_FS))
			continue;
		dir_match = match_prop(cur, DTD_ATTR_DIR, tabptr->zone_fs_dir);
		spec_match = match_prop(cur, DTD_ATTR_SPECIAL,
		    tabptr->zone_fs_special);
		raw_match = match_prop(cur, DTD_ATTR_RAW,
		    tabptr->zone_fs_raw);
		type_match = match_prop(cur, DTD_ATTR_TYPE,
		    tabptr->zone_fs_type);
		if (dir_match && spec_match && raw_match && type_match) {
			xmlUnlinkNode(cur);
			xmlFreeNode(cur);
			return (Z_OK);
		}
	}
	return (Z_NO_RESOURCE_ID);
}

int
zonecfg_delete_filesystem(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_filesystem_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_modify_filesystem(
	zone_dochandle_t handle,
	struct zone_fstab *oldtabptr,
	struct zone_fstab *newtabptr)
{
	int err;

	if (oldtabptr == NULL || newtabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_filesystem_core(handle, oldtabptr)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_filesystem_core(handle, newtabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_delete_ipd_core(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	xmlNodePtr cur = handle->zone_dh_cur;

	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_IPD))
			continue;
		if (match_prop(cur, DTD_ATTR_DIR, tabptr->zone_fs_dir)) {
			xmlUnlinkNode(cur);
			xmlFreeNode(cur);
			return (Z_OK);
		}
	}
	return (Z_NO_RESOURCE_ID);
}

int
zonecfg_delete_ipd(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_ipd_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_modify_ipd(zone_dochandle_t handle, struct zone_fstab *oldtabptr,
    struct zone_fstab *newtabptr)
{
	int err;

	if (oldtabptr == NULL || newtabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_ipd_core(handle, oldtabptr)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_ipd_core(handle, newtabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
fetchprop(xmlNodePtr cur, const xmlChar *propname, char *dst, size_t dstsize)
{
	xmlChar *property;
	size_t srcsize;

	if ((property = xmlGetProp(cur, propname)) == NULL)
		return (Z_BAD_PROPERTY);
	srcsize = strlcpy(dst, (char *)property, dstsize);
	xmlFree(property);
	if (srcsize >= dstsize)
		return (Z_TOO_BIG);
	return (Z_OK);
}

static int
fetch_alloc_prop(xmlNodePtr cur, const xmlChar *propname, char **dst)
{
	xmlChar *property;

	if ((property = xmlGetProp(cur, propname)) == NULL)
		return (Z_BAD_PROPERTY);
	if ((*dst = strdup((char *)property)) == NULL) {
		xmlFree(property);
		return (Z_NOMEM);
	}
	xmlFree(property);
	return (Z_OK);
}

int
zonecfg_lookup_filesystem(
	zone_dochandle_t handle,
	struct zone_fstab *tabptr)
{
	xmlNodePtr cur, options, firstmatch;
	int err;
	char dirname[MAXPATHLEN], special[MAXPATHLEN], raw[MAXPATHLEN];
	char type[FSTYPSZ];
	char options_str[MAX_MNTOPT_STR];

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	/*
	 * Walk the list of children looking for matches on any properties
	 * specified in the fstab parameter.  If more than one resource
	 * matches, we return Z_INSUFFICIENT_SPEC; if none match, we return
	 * Z_NO_RESOURCE_ID.
	 */
	cur = handle->zone_dh_cur;
	firstmatch = NULL;
	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_FS))
			continue;
		if (strlen(tabptr->zone_fs_dir) > 0) {
			if ((fetchprop(cur, DTD_ATTR_DIR, dirname,
			    sizeof (dirname)) == Z_OK) &&
			    (strcmp(tabptr->zone_fs_dir, dirname) == 0)) {
				if (firstmatch == NULL)
					firstmatch = cur;
				else
					return (Z_INSUFFICIENT_SPEC);
			}
		}
		if (strlen(tabptr->zone_fs_special) > 0) {
			if ((fetchprop(cur, DTD_ATTR_SPECIAL, special,
			    sizeof (special)) == Z_OK)) {
				if (strcmp(tabptr->zone_fs_special,
				    special) == 0) {
					if (firstmatch == NULL)
						firstmatch = cur;
					else if (firstmatch != cur)
						return (Z_INSUFFICIENT_SPEC);
				} else {
					/*
					 * If another property matched but this
					 * one doesn't then reset firstmatch.
					 */
					if (firstmatch == cur)
						firstmatch = NULL;
				}
			}
		}
		if (strlen(tabptr->zone_fs_raw) > 0) {
			if ((fetchprop(cur, DTD_ATTR_RAW, raw,
			    sizeof (raw)) == Z_OK)) {
				if (strcmp(tabptr->zone_fs_raw, raw) == 0) {
					if (firstmatch == NULL)
						firstmatch = cur;
					else if (firstmatch != cur)
						return (Z_INSUFFICIENT_SPEC);
				} else {
					/*
					 * If another property matched but this
					 * one doesn't then reset firstmatch.
					 */
					if (firstmatch == cur)
						firstmatch = NULL;
				}
			}
		}
		if (strlen(tabptr->zone_fs_type) > 0) {
			if ((fetchprop(cur, DTD_ATTR_TYPE, type,
			    sizeof (type)) == Z_OK)) {
				if (strcmp(tabptr->zone_fs_type, type) == 0) {
					if (firstmatch == NULL)
						firstmatch = cur;
					else if (firstmatch != cur)
						return (Z_INSUFFICIENT_SPEC);
				} else {
					/*
					 * If another property matched but this
					 * one doesn't then reset firstmatch.
					 */
					if (firstmatch == cur)
						firstmatch = NULL;
				}
			}
		}
	}

	if (firstmatch == NULL)
		return (Z_NO_RESOURCE_ID);

	cur = firstmatch;

	if ((err = fetchprop(cur, DTD_ATTR_DIR, tabptr->zone_fs_dir,
	    sizeof (tabptr->zone_fs_dir))) != Z_OK)
		return (err);

	if ((err = fetchprop(cur, DTD_ATTR_SPECIAL, tabptr->zone_fs_special,
	    sizeof (tabptr->zone_fs_special))) != Z_OK)
		return (err);

	if ((err = fetchprop(cur, DTD_ATTR_RAW, tabptr->zone_fs_raw,
	    sizeof (tabptr->zone_fs_raw))) != Z_OK)
		return (err);

	if ((err = fetchprop(cur, DTD_ATTR_TYPE, tabptr->zone_fs_type,
	    sizeof (tabptr->zone_fs_type))) != Z_OK)
		return (err);

	/* options are optional */
	tabptr->zone_fs_options = NULL;
	for (options = cur->xmlChildrenNode; options != NULL;
	    options = options->next) {
		if ((fetchprop(options, DTD_ATTR_NAME, options_str,
		    sizeof (options_str)) != Z_OK))
			break;
		if (zonecfg_add_fs_option(tabptr, options_str) != Z_OK)
			break;
	}
	return (Z_OK);
}

int
zonecfg_lookup_ipd(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	xmlNodePtr cur, match;
	int err;
	char dirname[MAXPATHLEN];

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	/*
	 * General algorithm:
	 * Walk the list of children looking for matches on any properties
	 * specified in the fstab parameter.  If more than one resource
	 * matches, we return Z_INSUFFICIENT_SPEC; if none match, we return
	 * Z_NO_RESOURCE_ID.
	 */
	cur = handle->zone_dh_cur;
	match = NULL;
	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_IPD))
			continue;
		if (strlen(tabptr->zone_fs_dir) > 0) {
			if ((fetchprop(cur, DTD_ATTR_DIR, dirname,
			    sizeof (dirname)) == Z_OK) &&
			    (strcmp(tabptr->zone_fs_dir, dirname) == 0)) {
				if (match == NULL)
					match = cur;
				else
					return (Z_INSUFFICIENT_SPEC);
			}
		}
	}

	if (match == NULL)
		return (Z_NO_RESOURCE_ID);

	cur = match;

	if ((err = fetchprop(cur, DTD_ATTR_DIR, tabptr->zone_fs_dir,
	    sizeof (tabptr->zone_fs_dir))) != Z_OK)
		return (err);

	return (Z_OK);
}

/*
 * Compare two IP addresses in string form.  Allow for the possibility that
 * one might have "/<prefix-length>" at the end: allow a match on just the
 * IP address (or host name) part.
 */

boolean_t
zonecfg_same_net_address(char *a1, char *a2)
{
	char *slashp, *slashp1, *slashp2;
	int result;

	if (strcmp(a1, a2) == 0)
		return (B_TRUE);

	/*
	 * If neither has a slash or both do, they need to match to be
	 * considered the same, but they did not match above, so fail.
	 */
	slashp1 = strchr(a1, '/');
	slashp2 = strchr(a2, '/');
	if ((slashp1 == NULL && slashp2 == NULL) ||
	    (slashp1 != NULL && slashp2 != NULL))
		return (B_FALSE);

	/*
	 * Only one had a slash: pick that one, zero out the slash, compare
	 * the "address only" strings, restore the slash, and return the
	 * result of the comparison.
	 */
	slashp = (slashp1 == NULL) ? slashp2 : slashp1;
	*slashp = '\0';
	result = strcmp(a1, a2);
	*slashp = '/';
	return ((result == 0));
}

int
zonecfg_valid_net_address(char *address, struct lifreq *lifr)
{
	struct sockaddr_in *sin4;
	struct sockaddr_in6 *sin6;
	struct addrinfo hints, *result;
	char *slashp = strchr(address, '/');

	bzero(lifr, sizeof (struct lifreq));
	sin4 = (struct sockaddr_in *)&lifr->lifr_addr;
	sin6 = (struct sockaddr_in6 *)&lifr->lifr_addr;
	if (slashp != NULL)
		*slashp = '\0';
	if (inet_pton(AF_INET, address, &sin4->sin_addr) == 1) {
		sin4->sin_family = AF_INET;
	} else if (inet_pton(AF_INET6, address, &sin6->sin6_addr) == 1) {
		if (slashp == NULL)
			return (Z_IPV6_ADDR_PREFIX_LEN);
		sin6->sin6_family = AF_INET6;
	} else {
		/* "address" may be a host name */
		(void) memset(&hints, 0, sizeof (hints));
		hints.ai_family = PF_INET;
		if (getaddrinfo(address, NULL, &hints, &result) != 0)
			return (Z_BOGUS_ADDRESS);
		sin4->sin_family = result->ai_family;

		(void) memcpy(&sin4->sin_addr,
		    /* LINTED E_BAD_PTR_CAST_ALIGN */
		    &((struct sockaddr_in *)result->ai_addr)->sin_addr,
		    sizeof (struct in_addr));

		freeaddrinfo(result);
	}
	return (Z_OK);
}

int
zonecfg_lookup_nwif(zone_dochandle_t handle, struct zone_nwiftab *tabptr)
{
	xmlNodePtr cur, firstmatch;
	int err;
	char address[INET6_ADDRSTRLEN], physical[LIFNAMSIZ];

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	cur = handle->zone_dh_cur;
	firstmatch = NULL;
	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_NET))
			continue;
		if (strlen(tabptr->zone_nwif_physical) > 0) {
			if ((fetchprop(cur, DTD_ATTR_PHYSICAL, physical,
			    sizeof (physical)) == Z_OK) &&
			    (strcmp(tabptr->zone_nwif_physical,
			    physical) == 0)) {
				if (firstmatch == NULL)
					firstmatch = cur;
				else
					return (Z_INSUFFICIENT_SPEC);
			}
		}
		if (strlen(tabptr->zone_nwif_address) > 0) {
			if ((fetchprop(cur, DTD_ATTR_ADDRESS, address,
			    sizeof (address)) == Z_OK)) {
				if (zonecfg_same_net_address(
				    tabptr->zone_nwif_address, address)) {
					if (firstmatch == NULL)
						firstmatch = cur;
					else if (firstmatch != cur)
						return (Z_INSUFFICIENT_SPEC);
				} else {
					/*
					 * If another property matched but this
					 * one doesn't then reset firstmatch.
					 */
					if (firstmatch == cur)
						firstmatch = NULL;
				}
			}
		}
	}
	if (firstmatch == NULL)
		return (Z_NO_RESOURCE_ID);

	cur = firstmatch;

	if ((err = fetchprop(cur, DTD_ATTR_PHYSICAL, tabptr->zone_nwif_physical,
	    sizeof (tabptr->zone_nwif_physical))) != Z_OK)
		return (err);

	if ((err = fetchprop(cur, DTD_ATTR_ADDRESS, tabptr->zone_nwif_address,
	    sizeof (tabptr->zone_nwif_address))) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_add_nwif_core(zone_dochandle_t handle, struct zone_nwiftab *tabptr)
{
	xmlNodePtr newnode, cur = handle->zone_dh_cur;
	int err;

	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_NET, NULL);
	if ((err = newprop(newnode, DTD_ATTR_ADDRESS,
	    tabptr->zone_nwif_address)) != Z_OK)
		return (err);
	if ((err = newprop(newnode, DTD_ATTR_PHYSICAL,
	    tabptr->zone_nwif_physical)) != Z_OK)
		return (err);
	return (Z_OK);
}

int
zonecfg_add_nwif(zone_dochandle_t handle, struct zone_nwiftab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_nwif_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_delete_nwif_core(zone_dochandle_t handle, struct zone_nwiftab *tabptr)
{
	xmlNodePtr cur = handle->zone_dh_cur;
	boolean_t addr_match, phys_match;

	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_NET))
			continue;

		addr_match = match_prop(cur, DTD_ATTR_ADDRESS,
		    tabptr->zone_nwif_address);
		phys_match = match_prop(cur, DTD_ATTR_PHYSICAL,
		    tabptr->zone_nwif_physical);

		if (addr_match && phys_match) {
			xmlUnlinkNode(cur);
			xmlFreeNode(cur);
			return (Z_OK);
		}
	}
	return (Z_NO_RESOURCE_ID);
}

int
zonecfg_delete_nwif(zone_dochandle_t handle, struct zone_nwiftab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_nwif_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_modify_nwif(
	zone_dochandle_t handle,
	struct zone_nwiftab *oldtabptr,
	struct zone_nwiftab *newtabptr)
{
	int err;

	if (oldtabptr == NULL || newtabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_nwif_core(handle, oldtabptr)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_nwif_core(handle, newtabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_lookup_dev(zone_dochandle_t handle, struct zone_devtab *tabptr)
{
	xmlNodePtr cur, firstmatch;
	int err;
	char match[MAXPATHLEN];

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	cur = handle->zone_dh_cur;
	firstmatch = NULL;
	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_DEVICE))
			continue;
		if (strlen(tabptr->zone_dev_match) == 0)
			continue;

		if ((fetchprop(cur, DTD_ATTR_MATCH, match,
		    sizeof (match)) == Z_OK)) {
			if (strcmp(tabptr->zone_dev_match,
			    match) == 0) {
				if (firstmatch == NULL)
					firstmatch = cur;
				else if (firstmatch != cur)
					return (Z_INSUFFICIENT_SPEC);
			} else {
				/*
				 * If another property matched but this
				 * one doesn't then reset firstmatch.
				 */
				if (firstmatch == cur)
					firstmatch = NULL;
			}
		}
	}
	if (firstmatch == NULL)
		return (Z_NO_RESOURCE_ID);

	cur = firstmatch;

	if ((err = fetchprop(cur, DTD_ATTR_MATCH, tabptr->zone_dev_match,
	    sizeof (tabptr->zone_dev_match))) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_add_dev_core(zone_dochandle_t handle, struct zone_devtab *tabptr)
{
	xmlNodePtr newnode, cur = handle->zone_dh_cur;
	int err;

	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_DEVICE, NULL);

	if ((err = newprop(newnode, DTD_ATTR_MATCH,
	    tabptr->zone_dev_match)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_add_dev(zone_dochandle_t handle, struct zone_devtab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_dev_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_delete_dev_core(zone_dochandle_t handle, struct zone_devtab *tabptr)
{
	xmlNodePtr cur = handle->zone_dh_cur;
	int match_match;

	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_DEVICE))
			continue;

		match_match = match_prop(cur, DTD_ATTR_MATCH,
		    tabptr->zone_dev_match);

		if (match_match) {
			xmlUnlinkNode(cur);
			xmlFreeNode(cur);
			return (Z_OK);
		}
	}
	return (Z_NO_RESOURCE_ID);
}

int
zonecfg_delete_dev(zone_dochandle_t handle, struct zone_devtab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_dev_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_modify_dev(
	zone_dochandle_t handle,
	struct zone_devtab *oldtabptr,
	struct zone_devtab *newtabptr)
{
	int err;

	if (oldtabptr == NULL || newtabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_dev_core(handle, oldtabptr)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_dev_core(handle, newtabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

/* Lock to serialize all zonecfg_devwalks */
static pthread_mutex_t zonecfg_devwalk_lock = PTHREAD_MUTEX_INITIALIZER;
/*
 * Global variables used to pass data from zonecfg_devwalk to the nftw
 * call-back (zonecfg_devwalk_cb).  g_devwalk_data is really the void*
 * parameter and g_devwalk_cb is really the *cb parameter from zonecfg_devwalk.
 */
static void *g_devwalk_data;
static int (*g_devwalk_cb)(const char *, uid_t, gid_t, mode_t, const char *,
    void *);
static size_t g_devwalk_skip_prefix;

/*
 * This is the nftw call-back function used by zonecfg_devwalk.  It is
 * responsible for calling the actual call-back that is passed in to
 * zonecfg_devwalk as the *cb argument.
 */
/* ARGSUSED2 */
static int
zonecfg_devwalk_cb(const char *path, const struct stat *st, int f,
    struct FTW *ftw)
{
	acl_t *acl;
	char *acl_txt = NULL;

	/* skip all but character and block devices */
	if (!S_ISBLK(st->st_mode) && !S_ISCHR(st->st_mode))
		return (0);

	if ((acl_get(path, ACL_NO_TRIVIAL, &acl) == 0) &&
	    acl != NULL) {
		acl_txt = acl_totext(acl, ACL_NORESOLVE);
		acl_free(acl);
	}

	if (strlen(path) <= g_devwalk_skip_prefix)
		return (0);

	g_devwalk_cb(path + g_devwalk_skip_prefix, st->st_uid, st->st_gid,
	    st->st_mode & S_IAMB, acl_txt != NULL ? acl_txt : "",
	    g_devwalk_data);
	free(acl_txt);
	return (0);
}

/*
 * Walk the dev tree for the zone specified by hdl and call the call-back (cb)
 * function for each entry in the tree.  The call-back will be passed the
 * name, uid, gid, mode, acl string and the void *data input parameter
 * for each dev entry.
 *
 * Data is passed to the zonecfg_devwalk_cb through the global variables
 * g_devwalk_data, *g_devwalk_cb, and g_devwalk_skip_prefix.  The
 * zonecfg_devwalk_cb function will actually call *cb.
 */
int
zonecfg_devwalk(zone_dochandle_t hdl,
    int (*cb)(const char *, uid_t, gid_t, mode_t, const char *, void *),
    void *data)
{
	char path[MAXPATHLEN];
	int ret;

	if ((ret = zonecfg_get_zonepath(hdl, path, sizeof (path))) != Z_OK)
		return (ret);

	if (strlcat(path, "/dev", sizeof (path)) >= sizeof (path))
		return (Z_TOO_BIG);
	g_devwalk_skip_prefix = strlen(path) + 1;

	/*
	 * We have to serialize all zonecfg_devwalks in the same process
	 * (which should be fine), since nftw() is so badly designed.
	 */
	(void) pthread_mutex_lock(&zonecfg_devwalk_lock);

	g_devwalk_data = data;
	g_devwalk_cb = cb;
	(void) nftw(path, zonecfg_devwalk_cb, 0, FTW_PHYS);

	(void) pthread_mutex_unlock(&zonecfg_devwalk_lock);
	return (Z_OK);
}

/*
 * Update the owner, group, mode and acl on the specified dev (inpath) for
 * the zone (hdl).  This function can be used to fix up the dev tree after
 * attaching a migrated zone.
 */
int
zonecfg_devperms_apply(zone_dochandle_t hdl, const char *inpath, uid_t owner,
    gid_t group, mode_t mode, const char *acltxt)
{
	int ret;
	char path[MAXPATHLEN];
	struct stat st;
	acl_t *aclp;

	if ((ret = zonecfg_get_zonepath(hdl, path, sizeof (path))) != Z_OK)
		return (ret);

	if (strlcat(path, "/dev/", sizeof (path)) >= sizeof (path))
		return (Z_TOO_BIG);
	if (strlcat(path, inpath, sizeof (path)) >= sizeof (path))
		return (Z_TOO_BIG);

	if (stat(path, &st) == -1)
		return (Z_INVAL);

	/* make sure we're only touching device nodes */
	if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode))
		return (Z_INVAL);

	if (chown(path, owner, group) == -1)
		return (Z_SYSTEM);

	if (chmod(path, mode) == -1)
		return (Z_SYSTEM);

	if ((acltxt == NULL) || (strcmp(acltxt, "") == 0))
		return (Z_OK);

	if (acl_fromtext(acltxt, &aclp) != 0)
		return (Z_SYSTEM);

	errno = 0;
	if (acl_set(path, aclp) == -1) {
		free(aclp);
		return (Z_SYSTEM);
	}

	free(aclp);
	return (Z_OK);
}

/*
 * This is the set of devices which must be present in every zone.  Users
 * can augment this list with additional device rules in their zone
 * configuration, but at present cannot remove any of the this set of
 * standard devices.  All matching is done by /dev pathname (the "/dev"
 * part is implicit.  Try to keep rules which match a large number of
 * devices (like the pts rule) first.
 */
static const char *standard_devs[] = {
	"pts/*",
	"ptmx",
	"random",
	"urandom",
	"poll",
	"pool",
	"kstat",
	"zero",
	"null",
	"crypto",
	"cryptoadm",
	"ticots",
	"ticotsord",
	"ticlts",
	"lo0",
	"lo1",
	"lo2",
	"lo3",
	"sad/user",
	"tty",
	"logindmux",
	"log",
	"conslog",
	"arp",
	"tcp",
	"tcp6",
	"udp",
	"udp6",
	"sysevent",
#ifdef __sparc
	"openprom",
#endif
	"cpu/self/cpuid",
	"dtrace/helper",
	"zfs",
	NULL
};

/*
 * This function finds everything mounted under a zone's rootpath.
 * This returns the number of mounts under rootpath, or -1 on error.
 * callback is called once per mount found with the first argument
 * pointing to the  mount point.
 *
 * If the callback function returns non-zero zonecfg_find_mounts
 * aborts with an error.
 */

int
zonecfg_find_mounts(char *rootpath, int (*callback)(const char *, void *),
    void *priv) {
	FILE *mnttab;
	struct mnttab m;
	size_t l;
	int rv = 0;

	assert(rootpath != NULL);

	l = strlen(rootpath);

	mnttab = fopen("/etc/mnttab", "r");

	if (mnttab == NULL)
		return (-1);

	if (ioctl(fileno(mnttab), MNTIOC_SHOWHIDDEN, NULL) < 0)  {
		rv = -1;
		goto out;
	}

	while (!getmntent(mnttab, &m)) {
		if ((strncmp(rootpath, m.mnt_mountp, l) == 0) &&
		    (m.mnt_mountp[l] == '/')) {
			rv++;
			if (callback == NULL)
				continue;
			if (callback(m.mnt_mountp, priv)) {
				rv = -1;
				goto out;

			}
		}
	}

out:
	(void) fclose(mnttab);
	return (rv);
}

/*
 * This routine is used to determine if a given device should appear in the
 * zone represented by 'handle'.  First it consults the list of "standard"
 * zone devices.  Then it scans the user-supplied device entries.
 */
int
zonecfg_match_dev(zone_dochandle_t handle, char *devpath,
    struct zone_devtab *out_match)
{
	int err;
	boolean_t found = B_FALSE;
	char match[MAXPATHLEN];
	const char **stdmatch;
	xmlNodePtr cur;

	if (handle == NULL || devpath == NULL)
		return (Z_INVAL);

	/*
	 * Check the "standard" devices which we require to be present.
	 */
	for (stdmatch = &standard_devs[0]; *stdmatch != NULL; stdmatch++) {
		/*
		 * fnmatch gives us simple but powerful shell-style matching.
		 */
		if (fnmatch(*stdmatch, devpath, FNM_PATHNAME) == 0) {
			if (!out_match)
				return (Z_OK);
			(void) snprintf(out_match->zone_dev_match,
			    sizeof (out_match->zone_dev_match),
			    "/dev/%s", *stdmatch);
			return (Z_OK);
		}
	}

	/*
	 * We got no hits in the set of standard devices.  On to the user
	 * supplied ones.
	 */
	if ((err = operation_prep(handle)) != Z_OK) {
		handle->zone_dh_cur = NULL;
		return (err);
	}

	cur = handle->zone_dh_cur;
	cur = cur->xmlChildrenNode;
	if (cur == NULL)
		return (Z_NO_ENTRY);
	handle->zone_dh_cur = cur;

	for (; cur != NULL; cur = cur->next) {
		char *m;
		if (xmlStrcmp(cur->name, DTD_ELEM_DEVICE) != 0)
			continue;
		if ((err = fetchprop(cur, DTD_ATTR_MATCH, match,
		    sizeof (match))) != Z_OK) {
			handle->zone_dh_cur = handle->zone_dh_top;
			return (err);
		}
		m = match;
		/*
		 * fnmatch gives us simple but powerful shell-style matching;
		 * but first, we need to strip out /dev/ from the matching rule.
		 */
		if (strncmp(m, "/dev/", 5) == 0)
			m += 5;

		if (fnmatch(m, devpath, FNM_PATHNAME) == 0) {
			found = B_TRUE;
			break;
		}
	}

	if (!found)
		return (Z_NO_ENTRY);

	if (!out_match)
		return (Z_OK);

	(void) strlcpy(out_match->zone_dev_match, match,
	    sizeof (out_match->zone_dev_match));
	return (Z_OK);
}

int
zonecfg_lookup_attr(zone_dochandle_t handle, struct zone_attrtab *tabptr)
{
	xmlNodePtr cur, firstmatch;
	int err;
	char name[MAXNAMELEN], type[MAXNAMELEN], value[MAXNAMELEN];

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	cur = handle->zone_dh_cur;
	firstmatch = NULL;
	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_ATTR))
			continue;
		if (strlen(tabptr->zone_attr_name) > 0) {
			if ((fetchprop(cur, DTD_ATTR_NAME, name,
			    sizeof (name)) == Z_OK) &&
			    (strcmp(tabptr->zone_attr_name, name) == 0)) {
				if (firstmatch == NULL)
					firstmatch = cur;
				else
					return (Z_INSUFFICIENT_SPEC);
			}
		}
		if (strlen(tabptr->zone_attr_type) > 0) {
			if ((fetchprop(cur, DTD_ATTR_TYPE, type,
			    sizeof (type)) == Z_OK)) {
				if (strcmp(tabptr->zone_attr_type, type) == 0) {
					if (firstmatch == NULL)
						firstmatch = cur;
					else if (firstmatch != cur)
						return (Z_INSUFFICIENT_SPEC);
				} else {
					/*
					 * If another property matched but this
					 * one doesn't then reset firstmatch.
					 */
					if (firstmatch == cur)
						firstmatch = NULL;
				}
			}
		}
		if (strlen(tabptr->zone_attr_value) > 0) {
			if ((fetchprop(cur, DTD_ATTR_VALUE, value,
			    sizeof (value)) == Z_OK)) {
				if (strcmp(tabptr->zone_attr_value, value) ==
				    0) {
					if (firstmatch == NULL)
						firstmatch = cur;
					else if (firstmatch != cur)
						return (Z_INSUFFICIENT_SPEC);
				} else {
					/*
					 * If another property matched but this
					 * one doesn't then reset firstmatch.
					 */
					if (firstmatch == cur)
						firstmatch = NULL;
				}
			}
		}
	}
	if (firstmatch == NULL)
		return (Z_NO_RESOURCE_ID);

	cur = firstmatch;

	if ((err = fetchprop(cur, DTD_ATTR_NAME, tabptr->zone_attr_name,
	    sizeof (tabptr->zone_attr_name))) != Z_OK)
		return (err);

	if ((err = fetchprop(cur, DTD_ATTR_TYPE, tabptr->zone_attr_type,
	    sizeof (tabptr->zone_attr_type))) != Z_OK)
		return (err);

	if ((err = fetchprop(cur, DTD_ATTR_VALUE, tabptr->zone_attr_value,
	    sizeof (tabptr->zone_attr_value))) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_add_attr_core(zone_dochandle_t handle, struct zone_attrtab *tabptr)
{
	xmlNodePtr newnode, cur = handle->zone_dh_cur;
	int err;

	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_ATTR, NULL);
	err = newprop(newnode, DTD_ATTR_NAME, tabptr->zone_attr_name);
	if (err != Z_OK)
		return (err);
	err = newprop(newnode, DTD_ATTR_TYPE, tabptr->zone_attr_type);
	if (err != Z_OK)
		return (err);
	err = newprop(newnode, DTD_ATTR_VALUE, tabptr->zone_attr_value);
	if (err != Z_OK)
		return (err);
	return (Z_OK);
}

int
zonecfg_add_attr(zone_dochandle_t handle, struct zone_attrtab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_attr_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_delete_attr_core(zone_dochandle_t handle, struct zone_attrtab *tabptr)
{
	xmlNodePtr cur = handle->zone_dh_cur;
	int name_match, type_match, value_match;

	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_ATTR))
			continue;

		name_match = match_prop(cur, DTD_ATTR_NAME,
		    tabptr->zone_attr_name);
		type_match = match_prop(cur, DTD_ATTR_TYPE,
		    tabptr->zone_attr_type);
		value_match = match_prop(cur, DTD_ATTR_VALUE,
		    tabptr->zone_attr_value);

		if (name_match && type_match && value_match) {
			xmlUnlinkNode(cur);
			xmlFreeNode(cur);
			return (Z_OK);
		}
	}
	return (Z_NO_RESOURCE_ID);
}

int
zonecfg_delete_attr(zone_dochandle_t handle, struct zone_attrtab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_attr_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_modify_attr(
	zone_dochandle_t handle,
	struct zone_attrtab *oldtabptr,
	struct zone_attrtab *newtabptr)
{
	int err;

	if (oldtabptr == NULL || newtabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_attr_core(handle, oldtabptr)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_attr_core(handle, newtabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_get_attr_boolean(const struct zone_attrtab *attr, boolean_t *value)
{
	if (attr == NULL)
		return (Z_INVAL);

	if (strcmp(attr->zone_attr_type, DTD_ENTITY_BOOLEAN) != 0)
		return (Z_INVAL);

	if (strcmp(attr->zone_attr_value, DTD_ENTITY_TRUE) == 0) {
		*value = B_TRUE;
		return (Z_OK);
	}
	if (strcmp(attr->zone_attr_value, DTD_ENTITY_FALSE) == 0) {
		*value = B_FALSE;
		return (Z_OK);
	}
	return (Z_INVAL);
}

int
zonecfg_get_attr_int(const struct zone_attrtab *attr, int64_t *value)
{
	long long result;
	char *endptr;

	if (attr == NULL)
		return (Z_INVAL);

	if (strcmp(attr->zone_attr_type, DTD_ENTITY_INT) != 0)
		return (Z_INVAL);

	errno = 0;
	result = strtoll(attr->zone_attr_value, &endptr, 10);
	if (errno != 0 || *endptr != '\0')
		return (Z_INVAL);
	*value = result;
	return (Z_OK);
}

int
zonecfg_get_attr_string(const struct zone_attrtab *attr, char *value,
    size_t val_sz)
{
	if (attr == NULL)
		return (Z_INVAL);

	if (strcmp(attr->zone_attr_type, DTD_ENTITY_STRING) != 0)
		return (Z_INVAL);

	if (strlcpy(value, attr->zone_attr_value, val_sz) >= val_sz)
		return (Z_TOO_BIG);
	return (Z_OK);
}

int
zonecfg_get_attr_uint(const struct zone_attrtab *attr, uint64_t *value)
{
	unsigned long long result;
	long long neg_result;
	char *endptr;

	if (attr == NULL)
		return (Z_INVAL);

	if (strcmp(attr->zone_attr_type, DTD_ENTITY_UINT) != 0)
		return (Z_INVAL);

	errno = 0;
	result = strtoull(attr->zone_attr_value, &endptr, 10);
	if (errno != 0 || *endptr != '\0')
		return (Z_INVAL);
	errno = 0;
	neg_result = strtoll(attr->zone_attr_value, &endptr, 10);
	/*
	 * Incredibly, strtoull("<negative number>", ...) will not fail but
	 * return whatever (negative) number cast as a u_longlong_t, so we
	 * need to look for this here.
	 */
	if (errno == 0 && neg_result < 0)
		return (Z_INVAL);
	*value = result;
	return (Z_OK);
}

int
zonecfg_lookup_rctl(zone_dochandle_t handle, struct zone_rctltab *tabptr)
{
	xmlNodePtr cur, val;
	char savedname[MAXNAMELEN];
	struct zone_rctlvaltab *valptr;
	int err;

	if (tabptr->zone_rctl_name == NULL ||
	    strlen(tabptr->zone_rctl_name) == 0)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	cur = handle->zone_dh_cur;
	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_RCTL))
			continue;
		if ((fetchprop(cur, DTD_ATTR_NAME, savedname,
		    sizeof (savedname)) == Z_OK) &&
		    (strcmp(savedname, tabptr->zone_rctl_name) == 0)) {
			tabptr->zone_rctl_valptr = NULL;
			for (val = cur->xmlChildrenNode; val != NULL;
			    val = val->next) {
				valptr = (struct zone_rctlvaltab *)malloc(
				    sizeof (struct zone_rctlvaltab));
				if (valptr == NULL)
					return (Z_NOMEM);
				if ((fetchprop(val, DTD_ATTR_PRIV,
				    valptr->zone_rctlval_priv,
				    sizeof (valptr->zone_rctlval_priv)) !=
				    Z_OK))
					break;
				if ((fetchprop(val, DTD_ATTR_LIMIT,
				    valptr->zone_rctlval_limit,
				    sizeof (valptr->zone_rctlval_limit)) !=
				    Z_OK))
					break;
				if ((fetchprop(val, DTD_ATTR_ACTION,
				    valptr->zone_rctlval_action,
				    sizeof (valptr->zone_rctlval_action)) !=
				    Z_OK))
					break;
				if (zonecfg_add_rctl_value(tabptr, valptr) !=
				    Z_OK)
					break;
			}
			return (Z_OK);
		}
	}
	return (Z_NO_RESOURCE_ID);
}

static int
zonecfg_add_rctl_core(zone_dochandle_t handle, struct zone_rctltab *tabptr)
{
	xmlNodePtr newnode, cur = handle->zone_dh_cur, valnode;
	struct zone_rctlvaltab *valptr;
	int err;

	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_RCTL, NULL);
	err = newprop(newnode, DTD_ATTR_NAME, tabptr->zone_rctl_name);
	if (err != Z_OK)
		return (err);
	for (valptr = tabptr->zone_rctl_valptr; valptr != NULL;
	    valptr = valptr->zone_rctlval_next) {
		valnode = xmlNewTextChild(newnode, NULL,
		    DTD_ELEM_RCTLVALUE, NULL);
		err = newprop(valnode, DTD_ATTR_PRIV,
		    valptr->zone_rctlval_priv);
		if (err != Z_OK)
			return (err);
		err = newprop(valnode, DTD_ATTR_LIMIT,
		    valptr->zone_rctlval_limit);
		if (err != Z_OK)
			return (err);
		err = newprop(valnode, DTD_ATTR_ACTION,
		    valptr->zone_rctlval_action);
		if (err != Z_OK)
			return (err);
	}
	return (Z_OK);
}

int
zonecfg_add_rctl(zone_dochandle_t handle, struct zone_rctltab *tabptr)
{
	int err;

	if (tabptr == NULL || tabptr->zone_rctl_name == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_rctl_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_delete_rctl_core(zone_dochandle_t handle, struct zone_rctltab *tabptr)
{
	xmlNodePtr cur = handle->zone_dh_cur;
	xmlChar *savedname;
	int name_result;

	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_RCTL))
			continue;

		savedname = xmlGetProp(cur, DTD_ATTR_NAME);
		if (savedname == NULL)	/* shouldn't happen */
			continue;
		name_result = xmlStrcmp(savedname,
		    (const xmlChar *) tabptr->zone_rctl_name);
		xmlFree(savedname);

		if (name_result == 0) {
			xmlUnlinkNode(cur);
			xmlFreeNode(cur);
			return (Z_OK);
		}
	}
	return (Z_NO_RESOURCE_ID);
}

int
zonecfg_delete_rctl(zone_dochandle_t handle, struct zone_rctltab *tabptr)
{
	int err;

	if (tabptr == NULL || tabptr->zone_rctl_name == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_rctl_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_modify_rctl(
	zone_dochandle_t handle,
	struct zone_rctltab *oldtabptr,
	struct zone_rctltab *newtabptr)
{
	int err;

	if (oldtabptr == NULL || oldtabptr->zone_rctl_name == NULL ||
	    newtabptr == NULL || newtabptr->zone_rctl_name == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_rctl_core(handle, oldtabptr)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_rctl_core(handle, newtabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_add_rctl_value(
	struct zone_rctltab *tabptr,
	struct zone_rctlvaltab *valtabptr)
{
	struct zone_rctlvaltab *last, *old, *new;
	rctlblk_t *rctlblk = alloca(rctlblk_size());

	last = tabptr->zone_rctl_valptr;
	for (old = last; old != NULL; old = old->zone_rctlval_next)
		last = old;	/* walk to the end of the list */
	new = valtabptr;	/* alloc'd by caller */
	new->zone_rctlval_next = NULL;
	if (zonecfg_construct_rctlblk(valtabptr, rctlblk) != Z_OK)
		return (Z_INVAL);
	if (!zonecfg_valid_rctlblk(rctlblk))
		return (Z_INVAL);
	if (last == NULL)
		tabptr->zone_rctl_valptr = new;
	else
		last->zone_rctlval_next = new;
	return (Z_OK);
}

int
zonecfg_remove_rctl_value(
	struct zone_rctltab *tabptr,
	struct zone_rctlvaltab *valtabptr)
{
	struct zone_rctlvaltab *last, *this, *next;

	last = tabptr->zone_rctl_valptr;
	for (this = last; this != NULL; this = this->zone_rctlval_next) {
		if (strcmp(this->zone_rctlval_priv,
		    valtabptr->zone_rctlval_priv) == 0 &&
		    strcmp(this->zone_rctlval_limit,
		    valtabptr->zone_rctlval_limit) == 0 &&
		    strcmp(this->zone_rctlval_action,
		    valtabptr->zone_rctlval_action) == 0) {
			next = this->zone_rctlval_next;
			if (this == tabptr->zone_rctl_valptr)
				tabptr->zone_rctl_valptr = next;
			else
				last->zone_rctlval_next = next;
			free(this);
			return (Z_OK);
		} else
			last = this;
	}
	return (Z_NO_PROPERTY_ID);
}

char *
zonecfg_strerror(int errnum)
{
	switch (errnum) {
	case Z_OK:
		return (dgettext(TEXT_DOMAIN, "OK"));
	case Z_EMPTY_DOCUMENT:
		return (dgettext(TEXT_DOMAIN, "Empty document"));
	case Z_WRONG_DOC_TYPE:
		return (dgettext(TEXT_DOMAIN, "Wrong document type"));
	case Z_BAD_PROPERTY:
		return (dgettext(TEXT_DOMAIN, "Bad document property"));
	case Z_TEMP_FILE:
		return (dgettext(TEXT_DOMAIN,
		    "Problem creating temporary file"));
	case Z_SAVING_FILE:
		return (dgettext(TEXT_DOMAIN, "Problem saving file"));
	case Z_NO_ENTRY:
		return (dgettext(TEXT_DOMAIN, "No such entry"));
	case Z_BOGUS_ZONE_NAME:
		return (dgettext(TEXT_DOMAIN, "Bogus zone name"));
	case Z_REQD_RESOURCE_MISSING:
		return (dgettext(TEXT_DOMAIN, "Required resource missing"));
	case Z_REQD_PROPERTY_MISSING:
		return (dgettext(TEXT_DOMAIN, "Required property missing"));
	case Z_BAD_HANDLE:
		return (dgettext(TEXT_DOMAIN, "Bad handle"));
	case Z_NOMEM:
		return (dgettext(TEXT_DOMAIN, "Out of memory"));
	case Z_INVAL:
		return (dgettext(TEXT_DOMAIN, "Invalid argument"));
	case Z_ACCES:
		return (dgettext(TEXT_DOMAIN, "Permission denied"));
	case Z_TOO_BIG:
		return (dgettext(TEXT_DOMAIN, "Argument list too long"));
	case Z_MISC_FS:
		return (dgettext(TEXT_DOMAIN,
		    "Miscellaneous file system error"));
	case Z_NO_ZONE:
		return (dgettext(TEXT_DOMAIN, "No such zone configured"));
	case Z_NO_RESOURCE_TYPE:
		return (dgettext(TEXT_DOMAIN, "No such resource type"));
	case Z_NO_RESOURCE_ID:
		return (dgettext(TEXT_DOMAIN, "No such resource with that id"));
	case Z_NO_PROPERTY_TYPE:
		return (dgettext(TEXT_DOMAIN, "No such property type"));
	case Z_NO_PROPERTY_ID:
		return (dgettext(TEXT_DOMAIN, "No such property with that id"));
	case Z_BAD_ZONE_STATE:
		return (dgettext(TEXT_DOMAIN,
		    "Zone state is invalid for the requested operation"));
	case Z_INVALID_DOCUMENT:
		return (dgettext(TEXT_DOMAIN, "Invalid document"));
	case Z_NAME_IN_USE:
		return (dgettext(TEXT_DOMAIN, "Zone name already in use"));
	case Z_NO_SUCH_ID:
		return (dgettext(TEXT_DOMAIN, "No such zone ID"));
	case Z_UPDATING_INDEX:
		return (dgettext(TEXT_DOMAIN, "Problem updating index file"));
	case Z_LOCKING_FILE:
		return (dgettext(TEXT_DOMAIN, "Locking index file"));
	case Z_UNLOCKING_FILE:
		return (dgettext(TEXT_DOMAIN, "Unlocking index file"));
	case Z_INSUFFICIENT_SPEC:
		return (dgettext(TEXT_DOMAIN, "Insufficient specification"));
	case Z_RESOLVED_PATH:
		return (dgettext(TEXT_DOMAIN, "Resolved path mismatch"));
	case Z_IPV6_ADDR_PREFIX_LEN:
		return (dgettext(TEXT_DOMAIN,
		    "IPv6 address missing required prefix length"));
	case Z_BOGUS_ADDRESS:
		return (dgettext(TEXT_DOMAIN,
		    "Neither an IPv4 nor an IPv6 address nor a host name"));
	default:
		return (dgettext(TEXT_DOMAIN, "Unknown error"));
	}
}

/*
 * Note that the zonecfg_setXent() and zonecfg_endXent() calls are all the
 * same, as they just turn around and call zonecfg_setent() / zonecfg_endent().
 */

static int
zonecfg_setent(zone_dochandle_t handle)
{
	xmlNodePtr cur;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK) {
		handle->zone_dh_cur = NULL;
		return (err);
	}
	cur = handle->zone_dh_cur;
	cur = cur->xmlChildrenNode;
	handle->zone_dh_cur = cur;
	return (Z_OK);
}

static int
zonecfg_endent(zone_dochandle_t handle)
{
	if (handle == NULL)
		return (Z_INVAL);

	handle->zone_dh_cur = handle->zone_dh_top;
	return (Z_OK);
}

int
zonecfg_setfsent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getfsent(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	xmlNodePtr cur, options;
	char options_str[MAX_MNTOPT_STR];
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_FS))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_SPECIAL, tabptr->zone_fs_special,
	    sizeof (tabptr->zone_fs_special))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	if ((err = fetchprop(cur, DTD_ATTR_RAW, tabptr->zone_fs_raw,
	    sizeof (tabptr->zone_fs_raw))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	if ((err = fetchprop(cur, DTD_ATTR_DIR, tabptr->zone_fs_dir,
	    sizeof (tabptr->zone_fs_dir))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	if ((err = fetchprop(cur, DTD_ATTR_TYPE, tabptr->zone_fs_type,
	    sizeof (tabptr->zone_fs_type))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	/* OK for options to be NULL */
	tabptr->zone_fs_options = NULL;
	for (options = cur->xmlChildrenNode; options != NULL;
	    options = options->next) {
		if (fetchprop(options, DTD_ATTR_NAME, options_str,
		    sizeof (options_str)) != Z_OK)
			break;
		if (zonecfg_add_fs_option(tabptr, options_str) != Z_OK)
			break;
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_endfsent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

int
zonecfg_setipdent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getipdent(zone_dochandle_t handle, struct zone_fstab *tabptr)
{
	xmlNodePtr cur;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_IPD))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_DIR, tabptr->zone_fs_dir,
	    sizeof (tabptr->zone_fs_dir))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_endipdent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

int
zonecfg_setnwifent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getnwifent(zone_dochandle_t handle, struct zone_nwiftab *tabptr)
{
	xmlNodePtr cur;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_NET))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_ADDRESS, tabptr->zone_nwif_address,
	    sizeof (tabptr->zone_nwif_address))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	if ((err = fetchprop(cur, DTD_ATTR_PHYSICAL, tabptr->zone_nwif_physical,
	    sizeof (tabptr->zone_nwif_physical))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_endnwifent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

int
zonecfg_setdevent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getdevent(zone_dochandle_t handle, struct zone_devtab *tabptr)
{
	xmlNodePtr cur;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_DEVICE))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_MATCH, tabptr->zone_dev_match,
	    sizeof (tabptr->zone_dev_match))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_enddevent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

int
zonecfg_setrctlent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getrctlent(zone_dochandle_t handle, struct zone_rctltab *tabptr)
{
	xmlNodePtr cur, val;
	struct zone_rctlvaltab *valptr;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_RCTL))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_NAME, tabptr->zone_rctl_name,
	    sizeof (tabptr->zone_rctl_name))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	tabptr->zone_rctl_valptr = NULL;
	for (val = cur->xmlChildrenNode; val != NULL; val = val->next) {
		valptr = (struct zone_rctlvaltab *)malloc(
		    sizeof (struct zone_rctlvaltab));
		if (valptr == NULL)
			return (Z_NOMEM);
		if (fetchprop(val, DTD_ATTR_PRIV, valptr->zone_rctlval_priv,
		    sizeof (valptr->zone_rctlval_priv)) != Z_OK)
			break;
		if (fetchprop(val, DTD_ATTR_LIMIT, valptr->zone_rctlval_limit,
		    sizeof (valptr->zone_rctlval_limit)) != Z_OK)
			break;
		if (fetchprop(val, DTD_ATTR_ACTION, valptr->zone_rctlval_action,
		    sizeof (valptr->zone_rctlval_action)) != Z_OK)
			break;
		if (zonecfg_add_rctl_value(tabptr, valptr) != Z_OK)
			break;
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_endrctlent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

int
zonecfg_setattrent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getattrent(zone_dochandle_t handle, struct zone_attrtab *tabptr)
{
	xmlNodePtr cur;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_ATTR))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_NAME, tabptr->zone_attr_name,
	    sizeof (tabptr->zone_attr_name))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	if ((err = fetchprop(cur, DTD_ATTR_TYPE, tabptr->zone_attr_type,
	    sizeof (tabptr->zone_attr_type))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	if ((err = fetchprop(cur, DTD_ATTR_VALUE, tabptr->zone_attr_value,
	    sizeof (tabptr->zone_attr_value))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_endattrent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

/* This will ultimately be configurable. */
static const char *priv_list[] = {
	PRIV_FILE_CHOWN,
	PRIV_FILE_CHOWN_SELF,
	PRIV_FILE_DAC_EXECUTE,
	PRIV_FILE_DAC_READ,
	PRIV_FILE_DAC_SEARCH,
	PRIV_FILE_DAC_WRITE,
	PRIV_FILE_OWNER,
	PRIV_FILE_SETID,
	PRIV_IPC_DAC_READ,
	PRIV_IPC_DAC_WRITE,
	PRIV_IPC_OWNER,
	PRIV_NET_ICMPACCESS,
	PRIV_NET_PRIVADDR,
	PRIV_PROC_CHROOT,
	PRIV_SYS_AUDIT,
	PRIV_PROC_AUDIT,
	PRIV_PROC_OWNER,
	PRIV_PROC_SETID,
	PRIV_PROC_TASKID,
	PRIV_SYS_ACCT,
	PRIV_SYS_ADMIN,
	PRIV_SYS_MOUNT,
	PRIV_SYS_NFS,
	PRIV_SYS_RESOURCE,
	PRIV_CONTRACT_EVENT,
	PRIV_CONTRACT_OBSERVER,
	NULL
};

int
zonecfg_get_privset(priv_set_t *privs)
{
	const char **strp;
	priv_set_t *basic = priv_str_to_set("basic", ",", NULL);

	if (basic == NULL)
		return (Z_INVAL);

	priv_union(basic, privs);
	priv_freeset(basic);

	for (strp = priv_list; *strp != NULL; strp++) {
		if (priv_addset(privs, *strp) != 0) {
			return (Z_INVAL);
		}
	}
	return (Z_OK);
}

int
zone_get_zonepath(char *zone_name, char *zonepath, size_t rp_sz)
{
	zone_dochandle_t handle;
	boolean_t found = B_FALSE;
	struct zoneent *ze;
	FILE *cookie;
	int err;
	char *cp;

	if (zone_name == NULL)
		return (Z_INVAL);

	(void) strlcpy(zonepath, zonecfg_root, rp_sz);
	cp = zonepath + strlen(zonepath);
	while (cp > zonepath && cp[-1] == '/')
		*--cp = '\0';

	if (strcmp(zone_name, GLOBAL_ZONENAME) == 0) {
		if (zonepath[0] == '\0')
			(void) strlcpy(zonepath, "/", rp_sz);
		return (Z_OK);
	}

	/*
	 * First check the index file.  Because older versions did not have
	 * a copy of the zone path, allow for it to be zero length, in which
	 * case we ignore this result and fall back to the XML files.
	 */
	cookie = setzoneent();
	while ((ze = getzoneent_private(cookie)) != NULL) {
		if (strcmp(ze->zone_name, zone_name) == 0) {
			found = B_TRUE;
			if (ze->zone_path[0] != '\0')
				(void) strlcpy(cp, ze->zone_path,
				    rp_sz - (cp - zonepath));
		}
		free(ze);
		if (found)
			break;
	}
	endzoneent(cookie);
	if (found && *cp != '\0')
		return (Z_OK);

	/* Fall back to the XML files. */
	if ((handle = zonecfg_init_handle()) == NULL)
		return (Z_NOMEM);

	/*
	 * Check the snapshot first: if a zone is running, its zonepath
	 * may have changed.
	 */
	if (zonecfg_get_snapshot_handle(zone_name, handle) != Z_OK) {
		if ((err = zonecfg_get_handle(zone_name, handle)) != Z_OK)
			return (err);
	}
	err = zonecfg_get_zonepath(handle, zonepath, rp_sz);
	zonecfg_fini_handle(handle);
	return (err);
}

int
zone_get_rootpath(char *zone_name, char *rootpath, size_t rp_sz)
{
	int err;

	/* This function makes sense for non-global zones only. */
	if (strcmp(zone_name, GLOBAL_ZONENAME) == 0)
		return (Z_BOGUS_ZONE_NAME);
	if ((err = zone_get_zonepath(zone_name, rootpath, rp_sz)) != Z_OK)
		return (err);
	if (strlcat(rootpath, "/root", rp_sz) >= rp_sz)
		return (Z_TOO_BIG);
	return (Z_OK);
}

static zone_state_t
kernel_state_to_user_state(zoneid_t zoneid, zone_status_t kernel_state)
{
	char zoneroot[MAXPATHLEN];
	size_t zlen;

	assert(kernel_state <= ZONE_MAX_STATE);
	switch (kernel_state) {
		case ZONE_IS_UNINITIALIZED:
			return (ZONE_STATE_READY);
		case ZONE_IS_READY:
			/*
			 * If the zone's root is mounted on $ZONEPATH/lu, then
			 * it's a mounted scratch zone.
			 */
			if (zone_getattr(zoneid, ZONE_ATTR_ROOT, zoneroot,
			    sizeof (zoneroot)) >= 0) {
				zlen = strlen(zoneroot);
				if (zlen > 3 &&
				    strcmp(zoneroot + zlen - 3, "/lu") == 0)
					return (ZONE_STATE_MOUNTED);
			}
			return (ZONE_STATE_READY);
		case ZONE_IS_BOOTING:
		case ZONE_IS_RUNNING:
			return (ZONE_STATE_RUNNING);
		case ZONE_IS_SHUTTING_DOWN:
		case ZONE_IS_EMPTY:
			return (ZONE_STATE_SHUTTING_DOWN);
		case ZONE_IS_DOWN:
		case ZONE_IS_DYING:
		case ZONE_IS_DEAD:
		default:
			return (ZONE_STATE_DOWN);
	}
	/* NOTREACHED */
}

int
zone_get_state(char *zone_name, zone_state_t *state_num)
{
	zone_status_t status;
	zoneid_t zone_id;
	struct zoneent *ze;
	boolean_t found = B_FALSE;
	FILE *cookie;
	char kernzone[ZONENAME_MAX];
	FILE *fp;

	if (zone_name == NULL)
		return (Z_INVAL);

	/*
	 * If we're looking at an alternate root, then we need to query the
	 * kernel using the scratch zone name.
	 */
	zone_id = -1;
	if (*zonecfg_root != '\0' && !zonecfg_is_scratch(zone_name)) {
		if ((fp = zonecfg_open_scratch("", B_FALSE)) != NULL) {
			if (zonecfg_find_scratch(fp, zone_name, zonecfg_root,
			    kernzone, sizeof (kernzone)) == 0)
				zone_id = getzoneidbyname(kernzone);
			zonecfg_close_scratch(fp);
		}
	} else {
		zone_id = getzoneidbyname(zone_name);
	}

	/* check to see if zone is running */
	if (zone_id != -1 &&
	    zone_getattr(zone_id, ZONE_ATTR_STATUS, &status,
	    sizeof (status)) >= 0) {
		*state_num = kernel_state_to_user_state(zone_id, status);
		return (Z_OK);
	}

	cookie = setzoneent();
	while ((ze = getzoneent_private(cookie)) != NULL) {
		if (strcmp(ze->zone_name, zone_name) == 0) {
			found = B_TRUE;
			*state_num = ze->zone_state;
		}
		free(ze);
		if (found)
			break;
	}
	endzoneent(cookie);
	return ((found) ? Z_OK : Z_NO_ZONE);
}

int
zone_set_state(char *zone, zone_state_t state)
{
	struct zoneent ze;

	if (state != ZONE_STATE_CONFIGURED && state != ZONE_STATE_INSTALLED &&
	    state != ZONE_STATE_INCOMPLETE)
		return (Z_INVAL);

	bzero(&ze, sizeof (ze));
	(void) strlcpy(ze.zone_name, zone, sizeof (ze.zone_name));
	ze.zone_state = state;
	(void) strlcpy(ze.zone_path, "", sizeof (ze.zone_path));
	return (putzoneent(&ze, PZE_MODIFY));
}

/*
 * Get id (if any) for specified zone.  There are four possible outcomes:
 * - If the string corresponds to the numeric id of an active (booted)
 *   zone, sets *zip to the zone id and returns 0.
 * - If the string corresponds to the name of an active (booted) zone,
 *   sets *zip to the zone id and returns 0.
 * - If the string is a name in the configuration but is not booted,
 *   sets *zip to ZONE_ID_UNDEFINED and returns 0.
 * - Otherwise, leaves *zip unchanged and returns -1.
 *
 * This function acts as an auxiliary filter on the function of the same
 * name in libc; the linker binds to this version if libzonecfg exists,
 * and the libc version if it doesn't.  Any changes to this version of
 * the function should probably be reflected in the libc version as well.
 */
int
zone_get_id(const char *str, zoneid_t *zip)
{
	zone_dochandle_t hdl;
	zoneid_t zoneid;
	char *cp;
	int err;

	/* first try looking for active zone by id */
	errno = 0;
	zoneid = (zoneid_t)strtol(str, &cp, 0);
	if (errno == 0 && cp != str && *cp == '\0' &&
	    getzonenamebyid(zoneid, NULL, 0) != -1) {
		*zip = zoneid;
		return (0);
	}

	/* then look for active zone by name */
	if ((zoneid = getzoneidbyname(str)) != -1) {
		*zip = zoneid;
		return (0);
	}

	/* if in global zone, try looking up name in configuration database */
	if (getzoneid() != GLOBAL_ZONEID ||
	    (hdl = zonecfg_init_handle()) == NULL)
		return (-1);

	if (zonecfg_get_handle(str, hdl) == Z_OK) {
		/* zone exists but isn't active */
		*zip = ZONE_ID_UNDEFINED;
		err = 0;
	} else {
		err = -1;
	}

	zonecfg_fini_handle(hdl);
	return (err);
}

char *
zone_state_str(zone_state_t state_num)
{
	switch (state_num) {
	case ZONE_STATE_CONFIGURED:
		return (ZONE_STATE_STR_CONFIGURED);
	case ZONE_STATE_INCOMPLETE:
		return (ZONE_STATE_STR_INCOMPLETE);
	case ZONE_STATE_INSTALLED:
		return (ZONE_STATE_STR_INSTALLED);
	case ZONE_STATE_READY:
		return (ZONE_STATE_STR_READY);
	case ZONE_STATE_MOUNTED:
		return (ZONE_STATE_STR_MOUNTED);
	case ZONE_STATE_RUNNING:
		return (ZONE_STATE_STR_RUNNING);
	case ZONE_STATE_SHUTTING_DOWN:
		return (ZONE_STATE_STR_SHUTTING_DOWN);
	case ZONE_STATE_DOWN:
		return (ZONE_STATE_STR_DOWN);
	default:
		return ("unknown");
	}
}

/*
 * Given a UUID value, find an associated zone name.  This is intended to be
 * used by callers who set up some 'default' name (corresponding to the
 * expected name for the zone) in the zonename buffer, and thus the function
 * doesn't touch this buffer on failure.
 */
int
zonecfg_get_name_by_uuid(const uuid_t uuid, char *zonename, size_t namelen)
{
	FILE *fp;
	struct zoneent *ze;

	/*
	 * A small amount of subterfuge via casts is necessary here because
	 * libuuid doesn't use const correctly, but we don't want to export
	 * this brokenness to our clients.
	 */
	if (uuid_is_null(*(uuid_t *)&uuid))
		return (Z_NO_ZONE);
	if ((fp = setzoneent()) == NULL)
		return (Z_NO_ZONE);
	while ((ze = getzoneent_private(fp)) != NULL) {
		if (uuid_compare(*(uuid_t *)&uuid, ze->zone_uuid) == 0)
			break;
		free(ze);
	}
	endzoneent(fp);
	if (ze != NULL) {
		(void) strlcpy(zonename, ze->zone_name, namelen);
		free(ze);
		return (Z_OK);
	} else {
		return (Z_NO_ZONE);
	}
}

/*
 * Given a zone name, get its UUID.  Returns a "NULL" UUID value if the zone
 * exists but the file doesn't have a value set yet.  Returns an error if the
 * zone cannot be located.
 */
int
zonecfg_get_uuid(const char *zonename, uuid_t uuid)
{
	FILE *fp;
	struct zoneent *ze;

	if ((fp = setzoneent()) == NULL)
		return (Z_NO_ZONE);
	while ((ze = getzoneent_private(fp)) != NULL) {
		if (strcmp(ze->zone_name, zonename) == 0)
			break;
		free(ze);
	}
	endzoneent(fp);
	if (ze != NULL) {
		uuid_copy(uuid, ze->zone_uuid);
		free(ze);
		return (Z_OK);
	} else {
		return (Z_NO_ZONE);
	}
}

/*
 * File-system convenience functions.
 */
boolean_t
zonecfg_valid_fs_type(const char *type)
{
	/*
	 * We already know which FS types don't work.
	 */
	if (strcmp(type, "proc") == 0 ||
	    strcmp(type, "mntfs") == 0 ||
	    strcmp(type, "autofs") == 0 ||
	    strncmp(type, "nfs", sizeof ("nfs") - 1) == 0 ||
	    strcmp(type, "cachefs") == 0)
		return (B_FALSE);
	/*
	 * The caller may do more detailed verification to make sure other
	 * aspects of this filesystem type make sense.
	 */
	return (B_TRUE);
}

/*
 * Generally uninteresting rctl convenience functions.
 */

int
zonecfg_construct_rctlblk(const struct zone_rctlvaltab *rctlval,
    rctlblk_t *rctlblk)
{
	unsigned long long ull;
	char *endp;
	rctl_priv_t priv;
	rctl_qty_t limit;
	uint_t action;

	/* Get the privilege */
	if (strcmp(rctlval->zone_rctlval_priv, "basic") == 0) {
		priv = RCPRIV_BASIC;
	} else if (strcmp(rctlval->zone_rctlval_priv, "privileged") == 0) {
		priv = RCPRIV_PRIVILEGED;
	} else {
		/* Invalid privilege */
		return (Z_INVAL);
	}

	/* deal with negative input; strtoull(3c) doesn't do what we want */
	if (rctlval->zone_rctlval_limit[0] == '-')
		return (Z_INVAL);
	/* Get the limit */
	errno = 0;
	ull = strtoull(rctlval->zone_rctlval_limit, &endp, 0);
	if (errno != 0 || *endp != '\0') {
		/* parse failed */
		return (Z_INVAL);
	}
	limit = (rctl_qty_t)ull;

	/* Get the action */
	if (strcmp(rctlval->zone_rctlval_action, "none") == 0) {
		action = RCTL_LOCAL_NOACTION;
	} else if (strcmp(rctlval->zone_rctlval_action, "signal") == 0) {
		action = RCTL_LOCAL_SIGNAL;
	} else if (strcmp(rctlval->zone_rctlval_action, "deny") == 0) {
		action = RCTL_LOCAL_DENY;
	} else {
		/* Invalid Action */
		return (Z_INVAL);
	}
	rctlblk_set_local_action(rctlblk, action, 0);
	rctlblk_set_privilege(rctlblk, priv);
	rctlblk_set_value(rctlblk, limit);
	return (Z_OK);
}

static int
rctl_check(const char *rctlname, void *arg)
{
	const char *attrname = arg;

	/*
	 * Returning 1 here is our signal to zonecfg_is_rctl() that it is
	 * indeed an rctl name recognized by the system.
	 */
	return (strcmp(rctlname, attrname) == 0 ? 1 : 0);
}

boolean_t
zonecfg_is_rctl(const char *name)
{
	return (rctl_walk(rctl_check, (void *)name) == 1);
}

boolean_t
zonecfg_valid_rctlname(const char *name)
{
	const char *c;

	if (strncmp(name, "zone.", sizeof ("zone.") - 1) != 0)
		return (B_FALSE);
	if (strlen(name) == sizeof ("zone.") - 1)
		return (B_FALSE);
	for (c = name + sizeof ("zone.") - 1; *c != '\0'; c++) {
		if (!isalpha(*c) && *c != '-')
			return (B_FALSE);
	}
	return (B_TRUE);
}

boolean_t
zonecfg_valid_rctlblk(const rctlblk_t *rctlblk)
{
	rctl_priv_t priv = rctlblk_get_privilege((rctlblk_t *)rctlblk);
	uint_t action = rctlblk_get_local_action((rctlblk_t *)rctlblk, NULL);

	if (priv != RCPRIV_PRIVILEGED)
		return (B_FALSE);
	if (action != RCTL_LOCAL_NOACTION && action != RCTL_LOCAL_DENY)
		return (B_FALSE);
	return (B_TRUE);
}

boolean_t
zonecfg_valid_rctl(const char *name, const rctlblk_t *rctlblk)
{
	rctlblk_t *current, *next;
	rctl_qty_t limit = rctlblk_get_value((rctlblk_t *)rctlblk);
	uint_t action = rctlblk_get_local_action((rctlblk_t *)rctlblk, NULL);
	uint_t global_flags;

	if (!zonecfg_valid_rctlblk(rctlblk))
		return (B_FALSE);
	if (!zonecfg_valid_rctlname(name))
		return (B_FALSE);

	current = alloca(rctlblk_size());
	if (getrctl(name, NULL, current, RCTL_FIRST) != 0)
		return (B_TRUE);	/* not an rctl on this system */
	/*
	 * Make sure the proposed value isn't greater than the current system
	 * value.
	 */
	next = alloca(rctlblk_size());
	while (rctlblk_get_privilege(current) != RCPRIV_SYSTEM) {
		rctlblk_t *tmp;

		if (getrctl(name, current, next, RCTL_NEXT) != 0)
			return (B_FALSE);	/* shouldn't happen */
		tmp = current;
		current = next;
		next = tmp;
	}
	if (limit > rctlblk_get_value(current))
		return (B_FALSE);

	/*
	 * Make sure the proposed action is allowed.
	 */
	global_flags = rctlblk_get_global_flags(current);
	if ((global_flags & RCTL_GLOBAL_DENY_NEVER) &&
	    action == RCTL_LOCAL_DENY)
		return (B_FALSE);
	if ((global_flags & RCTL_GLOBAL_DENY_ALWAYS) &&
	    action == RCTL_LOCAL_NOACTION)
		return (B_FALSE);

	return (B_TRUE);
}

/*
 * There is always a race condition between reading the initial copy of
 * a zones state and its state changing.  We address this by providing
 * zonecfg_notify_critical_enter and zonecfg_noticy_critical_exit functions.
 * When zonecfg_critical_enter is called, sets the state field to LOCKED
 * and aquires biglock. Biglock protects against other threads executing
 * critical_enter and the state field protects against state changes during
 * the critical period.
 *
 * If any state changes occur, zn_cb will set the failed field of the znotify
 * structure.  This will cause the critical_exit function to re-lock the
 * channel and return an error. Since evsnts may be delayed, the critical_exit
 * function "flushes" the queue by putting an event on the queue and waiting for
 * zn_cb to notify critical_exit that it received the ping event.
 */
static const char *
string_get_tok(const char *in, char delim, int num)
{
	int i = 0;

	for (; i < num; in++) {
		if (*in == delim)
			i++;
		if (*in == 0)
			return (NULL);
	}
	return (in);
}

static boolean_t
is_ping(sysevent_t *ev)
{
	if (strcmp(sysevent_get_subclass_name(ev),
		ZONE_EVENT_PING_SUBCLASS) == 0) {
		return (B_TRUE);
	} else {
		return (B_FALSE);
	}
}

static boolean_t
is_my_ping(sysevent_t *ev)
{
	const char *sender;
	char mypid[sizeof (pid_t) * 3 + 1];

	(void) snprintf(mypid, sizeof (mypid), "%i", getpid());
	sender = string_get_tok(sysevent_get_pub(ev), ':', 3);
	if (sender == NULL)
		return (B_FALSE);
	if (strcmp(sender, mypid) != 0)
		return (B_FALSE);
	return (B_TRUE);
}

static int
do_callback(struct znotify *zevtchan, sysevent_t *ev)
{
	nvlist_t *l;
	int zid;
	char *zonename;
	char *newstate;
	char *oldstate;
	int ret;
	hrtime_t when;

	if (strcmp(sysevent_get_subclass_name(ev),
	    ZONE_EVENT_STATUS_SUBCLASS) == 0) {

		if (sysevent_get_attr_list(ev, &l) != 0) {
			if (errno == ENOMEM) {
				zevtchan->zn_failure_count++;
				return (EAGAIN);
			}
			return (0);
		}
		ret = 0;

		if ((nvlist_lookup_string(l, ZONE_CB_NAME, &zonename) == 0) &&
		    (nvlist_lookup_string(l, ZONE_CB_NEWSTATE, &newstate)
			== 0) &&
		    (nvlist_lookup_string(l, ZONE_CB_OLDSTATE, &oldstate)
			== 0) &&
		    (nvlist_lookup_uint64(l, ZONE_CB_TIMESTAMP,
			    (uint64_t *)&when) == 0) &&
		    (nvlist_lookup_int32(l, ZONE_CB_ZONEID, &zid) == 0)) {
			ret = zevtchan->zn_callback(zonename, zid, newstate,
			    oldstate, when, zevtchan->zn_private);
		}

		zevtchan->zn_failure_count = 0;
		nvlist_free(l);
		return (ret);
	} else {
		/*
		 * We have received an event in an unknown subclass. Ignore.
		 */
		zevtchan->zn_failure_count = 0;
		return (0);
	}
}

static int
zn_cb(sysevent_t *ev, void *p)
{
	struct znotify *zevtchan = p;
	int error;

	(void) pthread_mutex_lock(&(zevtchan->zn_mutex));

	if (is_ping(ev) && !is_my_ping(ev)) {
		(void) pthread_mutex_unlock((&zevtchan->zn_mutex));
		return (0);
	}

	if (zevtchan->zn_state == ZN_LOCKED) {
		assert(!is_ping(ev));
		zevtchan->zn_failed = B_TRUE;
		(void) pthread_mutex_unlock(&(zevtchan->zn_mutex));
		return (0);
	}

	if (zevtchan->zn_state == ZN_PING_INFLIGHT) {
		if (is_ping(ev)) {
			zevtchan->zn_state = ZN_PING_RECEIVED;
			(void) pthread_cond_signal(&(zevtchan->zn_cond));
			(void) pthread_mutex_unlock(&(zevtchan->zn_mutex));
			return (0);
		} else {
			zevtchan->zn_failed = B_TRUE;
			(void) pthread_mutex_unlock(&(zevtchan->zn_mutex));
			return (0);
		}
	}

	if (zevtchan->zn_state == ZN_UNLOCKED) {

		error = do_callback(zevtchan, ev);
		(void) pthread_mutex_unlock(&(zevtchan->zn_mutex));
		/*
		 * Every ENOMEM failure causes do_callback to increment
		 * zn_failure_count and every success causes it to
		 * set zn_failure_count to zero.  If we got EAGAIN,
		 * we will sleep for zn_failure_count seconds and return
		 * EAGAIN to gpec to try again.
		 *
		 * After 55 seconds, or 10 try's we give up and drop the
		 * event.
		 */
		if (error == EAGAIN) {
			if (zevtchan->zn_failure_count > ZONE_CB_RETRY_COUNT) {
				return (0);
			}
			(void) sleep(zevtchan->zn_failure_count);
		}
		return (error);
	}

	if (zevtchan->zn_state == ZN_PING_RECEIVED) {
		(void) pthread_mutex_unlock(&(zevtchan->zn_mutex));
		return (0);
	}

	abort();
	return (0);
}

void
zonecfg_notify_critical_enter(void *h)
{
	struct znotify *zevtchan = h;

	(void) pthread_mutex_lock(&(zevtchan->zn_bigmutex));
	zevtchan->zn_state = ZN_LOCKED;
}

int
zonecfg_notify_critical_exit(void * h)
{

	struct znotify *zevtchan = h;

	if (zevtchan->zn_state == ZN_UNLOCKED)
		return (0);

	(void) pthread_mutex_lock(&(zevtchan->zn_mutex));
	zevtchan->zn_state = ZN_PING_INFLIGHT;

	(void) sysevent_evc_publish(zevtchan->zn_eventchan,
	    ZONE_EVENT_STATUS_CLASS,
	    ZONE_EVENT_PING_SUBCLASS, ZONE_EVENT_PING_PUBLISHER,
	    zevtchan->zn_subscriber_id, NULL, EVCH_SLEEP);

	while (zevtchan->zn_state != ZN_PING_RECEIVED) {
		(void) pthread_cond_wait(&(zevtchan->zn_cond),
		    &(zevtchan->zn_mutex));
	}

	if (zevtchan->zn_failed == B_TRUE) {
		zevtchan->zn_state = ZN_LOCKED;
		zevtchan->zn_failed = B_FALSE;
		(void) pthread_mutex_unlock(&(zevtchan->zn_mutex));
		return (1);
	}

	zevtchan->zn_state = ZN_UNLOCKED;
	(void) pthread_mutex_unlock(&(zevtchan->zn_mutex));
	(void) pthread_mutex_unlock(&(zevtchan->zn_bigmutex));
	return (0);
}

void
zonecfg_notify_critical_abort(void *h)
{
	struct znotify *zevtchan = h;

	zevtchan->zn_state = ZN_UNLOCKED;
	zevtchan->zn_failed = B_FALSE;
	/*
	 * Don't do anything about zn_lock. If it is held, it could only be
	 * held by zn_cb and it will be unlocked soon.
	 */
	(void) pthread_mutex_unlock(&(zevtchan->zn_bigmutex));
}

void *
zonecfg_notify_bind(int(*func)(const char *zonename, zoneid_t zid,
    const char *newstate, const char *oldstate, hrtime_t when, void *p),
    void *p)
{
	struct znotify *zevtchan;
	int i = 1;
	int r;

	zevtchan = malloc(sizeof (struct znotify));

	if (zevtchan == NULL)
		return (NULL);

	zevtchan->zn_private = p;
	zevtchan->zn_callback = func;
	zevtchan->zn_state = ZN_UNLOCKED;
	zevtchan->zn_failed = B_FALSE;

	if (pthread_mutex_init(&(zevtchan->zn_mutex), NULL))
		goto out3;
	if (pthread_cond_init(&(zevtchan->zn_cond), NULL)) {
		(void) pthread_mutex_destroy(&(zevtchan->zn_mutex));
		goto out3;
	}
	if (pthread_mutex_init(&(zevtchan->zn_bigmutex), NULL)) {
		(void) pthread_mutex_destroy(&(zevtchan->zn_mutex));
		(void) pthread_cond_destroy(&(zevtchan->zn_cond));
		goto out3;
	}

	if (sysevent_evc_bind(ZONE_EVENT_CHANNEL, &(zevtchan->zn_eventchan),
		0) != 0)
		goto out2;

	do {
		/*
		 * At 4 digits the subscriber ID gets too long and we have
		 * no chance of successfully registering.
		 */
		if (i > 999)
			goto out1;

		(void) sprintf(zevtchan->zn_subscriber_id, "zone_%li_%i",
		    getpid() % 999999l, i);

		r = sysevent_evc_subscribe(zevtchan->zn_eventchan,
		    zevtchan->zn_subscriber_id, ZONE_EVENT_STATUS_CLASS, zn_cb,
		    zevtchan, 0);

		i++;

	} while (r);

	return (zevtchan);
out1:
	sysevent_evc_unbind(zevtchan->zn_eventchan);
out2:
	(void) pthread_mutex_destroy(&zevtchan->zn_mutex);
	(void) pthread_cond_destroy(&zevtchan->zn_cond);
	(void) pthread_mutex_destroy(&(zevtchan->zn_bigmutex));
out3:
	free(zevtchan);

	return (NULL);
}

void
zonecfg_notify_unbind(void *handle)
{

	int ret;

	sysevent_evc_unbind(((struct znotify *)handle)->zn_eventchan);
	/*
	 * Check that all evc threads have gone away. This should be
	 * enforced by sysevent_evc_unbind.
	 */
	ret = pthread_mutex_trylock(&((struct znotify *)handle)->zn_mutex);

	if (ret)
		abort();

	(void) pthread_mutex_unlock(&((struct znotify *)handle)->zn_mutex);
	(void) pthread_mutex_destroy(&((struct znotify *)handle)->zn_mutex);
	(void) pthread_cond_destroy(&((struct znotify *)handle)->zn_cond);
	(void) pthread_mutex_destroy(&((struct znotify *)handle)->zn_bigmutex);

	free(handle);
}

static int
zonecfg_add_ds_core(zone_dochandle_t handle, struct zone_dstab *tabptr)
{
	xmlNodePtr newnode, cur = handle->zone_dh_cur;
	int err;

	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_DATASET, NULL);
	if ((err = newprop(newnode, DTD_ATTR_NAME,
	    tabptr->zone_dataset_name)) != Z_OK)
		return (err);
	return (Z_OK);
}

int
zonecfg_add_ds(zone_dochandle_t handle, struct zone_dstab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_ds_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

static int
zonecfg_delete_ds_core(zone_dochandle_t handle, struct zone_dstab *tabptr)
{
	xmlNodePtr cur = handle->zone_dh_cur;

	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_DATASET))
			continue;

		if (match_prop(cur, DTD_ATTR_NAME,
		    tabptr->zone_dataset_name)) {
			xmlUnlinkNode(cur);
			xmlFreeNode(cur);
			return (Z_OK);
		}
	}
	return (Z_NO_RESOURCE_ID);
}

int
zonecfg_delete_ds(zone_dochandle_t handle, struct zone_dstab *tabptr)
{
	int err;

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_ds_core(handle, tabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_modify_ds(
	zone_dochandle_t handle,
	struct zone_dstab *oldtabptr,
	struct zone_dstab *newtabptr)
{
	int err;

	if (oldtabptr == NULL || newtabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	if ((err = zonecfg_delete_ds_core(handle, oldtabptr)) != Z_OK)
		return (err);

	if ((err = zonecfg_add_ds_core(handle, newtabptr)) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_lookup_ds(zone_dochandle_t handle, struct zone_dstab *tabptr)
{
	xmlNodePtr cur, firstmatch;
	int err;
	char dataset[MAXNAMELEN];

	if (tabptr == NULL)
		return (Z_INVAL);

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	cur = handle->zone_dh_cur;
	firstmatch = NULL;
	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_DATASET))
			continue;
		if (strlen(tabptr->zone_dataset_name) > 0) {
			if ((fetchprop(cur, DTD_ATTR_NAME, dataset,
			    sizeof (dataset)) == Z_OK) &&
			    (strcmp(tabptr->zone_dataset_name,
			    dataset) == 0)) {
				if (firstmatch == NULL)
					firstmatch = cur;
				else
					return (Z_INSUFFICIENT_SPEC);
			}
		}
	}
	if (firstmatch == NULL)
		return (Z_NO_RESOURCE_ID);

	cur = firstmatch;

	if ((err = fetchprop(cur, DTD_ATTR_NAME, tabptr->zone_dataset_name,
	    sizeof (tabptr->zone_dataset_name))) != Z_OK)
		return (err);

	return (Z_OK);
}

int
zonecfg_setdsent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getdsent(zone_dochandle_t handle, struct zone_dstab *tabptr)
{
	xmlNodePtr cur;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_DATASET))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_NAME, tabptr->zone_dataset_name,
	    sizeof (tabptr->zone_dataset_name))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_enddsent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

int
zonecfg_setpkgent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getpkgent(zone_dochandle_t handle, struct zone_pkgtab *tabptr)
{
	xmlNodePtr cur;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_PACKAGE))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_NAME, tabptr->zone_pkg_name,
	    sizeof (tabptr->zone_pkg_name))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	if ((err = fetchprop(cur, DTD_ATTR_VERSION, tabptr->zone_pkg_version,
	    sizeof (tabptr->zone_pkg_version))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_endpkgent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

int
zonecfg_setpatchent(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getpatchent(zone_dochandle_t handle, struct zone_patchtab *tabptr)
{
	xmlNodePtr cur;
	int err;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_PATCH))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_ID, tabptr->zone_patch_id,
	    sizeof (tabptr->zone_patch_id))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_endpatchent(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

int
zonecfg_setdevperment(zone_dochandle_t handle)
{
	return (zonecfg_setent(handle));
}

int
zonecfg_getdevperment(zone_dochandle_t handle, struct zone_devpermtab *tabptr)
{
	xmlNodePtr cur;
	int err;
	char buf[128];

	tabptr->zone_devperm_acl = NULL;

	if (handle == NULL)
		return (Z_INVAL);

	if ((cur = handle->zone_dh_cur) == NULL)
		return (Z_NO_ENTRY);

	for (; cur != NULL; cur = cur->next)
		if (!xmlStrcmp(cur->name, DTD_ELEM_DEV_PERM))
			break;
	if (cur == NULL) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (Z_NO_ENTRY);
	}

	if ((err = fetchprop(cur, DTD_ATTR_NAME, tabptr->zone_devperm_name,
	    sizeof (tabptr->zone_devperm_name))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	if ((err = fetchprop(cur, DTD_ATTR_UID, buf, sizeof (buf))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}
	tabptr->zone_devperm_uid = (uid_t)atol(buf);

	if ((err = fetchprop(cur, DTD_ATTR_GID, buf, sizeof (buf))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}
	tabptr->zone_devperm_gid = (gid_t)atol(buf);

	if ((err = fetchprop(cur, DTD_ATTR_MODE, buf, sizeof (buf))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}
	tabptr->zone_devperm_mode = (mode_t)strtol(buf, (char **)NULL, 8);

	if ((err = fetch_alloc_prop(cur, DTD_ATTR_ACL,
	    &(tabptr->zone_devperm_acl))) != Z_OK) {
		handle->zone_dh_cur = handle->zone_dh_top;
		return (err);
	}

	handle->zone_dh_cur = cur->next;
	return (Z_OK);
}

int
zonecfg_enddevperment(zone_dochandle_t handle)
{
	return (zonecfg_endent(handle));
}

/*
 * Process a list of pkgs from an entry in the contents file, adding each pkg
 * name to the list of pkgs.
 *
 * It is possible for the pkg name to be preceeded by a special character
 * which indicates some bookkeeping information for pkging.  Check if the
 * first char is not an Alpha char.  If so, skip over it.
 */
static int
add_pkg_list(char *lastp, char ***plist, int *pcnt)
{
	char	*p;
	int	pkg_cnt = *pcnt;
	char	**pkgs = *plist;
	int	res = Z_OK;

	while ((p = strtok_r(NULL, " ", &lastp)) != NULL) {
		char	**tmpp;
		int	i;

		/* skip over any special pkg bookkeeping char */
		if (!isalpha(*p))
			p++;

		/* Check if the pkg is already in the list */
		for (i = 0; i < pkg_cnt; i++) {
			if (strcmp(p, pkgs[i]) == 0)
				break;
		}

		if (i < pkg_cnt)
			continue;

		/* The pkg is not in the list; add it. */
		if ((tmpp = (char **)realloc(pkgs,
		    sizeof (char *) * (pkg_cnt + 1))) == NULL) {
			res = Z_NOMEM;
			break;
		}
		pkgs = tmpp;

		if ((pkgs[pkg_cnt] = strdup(p)) == NULL) {
			res = Z_NOMEM;
			break;
		}
		pkg_cnt++;
	}

	*plist = pkgs;
	*pcnt = pkg_cnt;

	return (res);
}

/*
 * Process an entry from the contents file (type "directory") and if the
 * directory path is in the list of paths, add the associated list of pkgs
 * to the pkg list.  The input parameter "entry" will be broken up by
 * the parser within this function so its value will be modified when this
 * function exits.
 *
 * The entries we are looking for will look something like:
 *	/usr d none 0755 root sys SUNWctpls SUNWidnl SUNWlibCf ....
 */
static int
get_path_pkgs(char *entry, char **paths, int cnt, char ***pkgs, int *pkg_cnt)
{
	char	*f1;
	char	*f2;
	char	*lastp;
	int	i;
	int	res = Z_OK;

	if ((f1 = strtok_r(entry, " ", &lastp)) == NULL ||
	    (f2 = strtok_r(NULL, " ", &lastp)) == NULL || strcmp(f2, "d") != 0)
		return (Z_OK);

	/* Check if this directory entry is in the list of paths. */
	for (i = 0; i < cnt; i++) {
		if (fnmatch(paths[i], f1, FNM_PATHNAME) == 0) {
			/*
			 * We do want the pkgs for this path.  First, skip
			 * over the next 4 fields in the entry so that we call
			 * add_pkg_list starting with the pkg names.
			 */
			int j;

			for (j = 0; j < 4 &&
			    strtok_r(NULL, " ", &lastp) != NULL; j++);
			/*
			 * If there are < 4 fields this entry is corrupt,
			 * just skip it.
			 */
			if (j < 4)
				return (Z_OK);

			res = add_pkg_list(lastp, pkgs, pkg_cnt);
			break;
		}
	}

	return (res);
}

/*
 * Read an entry from a pkginfo or contents file.  Some of these lines can
 * either be arbitrarily long or be continued by a backslash at the end of
 * the line.  This function coalesces lines that are longer than the read
 * buffer, and lines that are continued, into one buffer which is returned.
 * The caller must free this memory.  NULL is returned when we hit EOF or
 * if we run out of memory (errno is set to ENOMEM).
 */
static char *
read_pkg_data(FILE *fp)
{
	char *start;
	char *inp;
	char *p;
	int char_cnt = 0;

	errno = 0;
	if ((start = (char *)malloc(PKGINFO_RD_LEN)) == NULL) {
		errno = ENOMEM;
		return (NULL);
	}

	inp = start;
	while ((p = fgets(inp, PKGINFO_RD_LEN, fp)) != NULL) {
		int len;

		len = strlen(inp);
		if (inp[len - 1] == '\n' &&
		    (len == 1 || inp[len - 2] != '\\')) {
			char_cnt = len;
			break;
		}

		if (inp[len - 2] == '\\')
			char_cnt += len - 2;
		else
			char_cnt += PKGINFO_RD_LEN - 1;

		if ((p = realloc(start, char_cnt + PKGINFO_RD_LEN)) == NULL) {
			errno = ENOMEM;
			break;
		}

		start = p;
		inp = start + char_cnt;
	}

	if (errno == ENOMEM || (p == NULL && char_cnt == 0)) {
		free(start);
		start = NULL;
	}

	return (start);
}

static void
free_ipd_pkgs(char **pkgs, int cnt)
{
	int i;

	for (i = 0; i < cnt; i++)
		free(pkgs[i]);
	free(pkgs);
}

/*
 * Get the list of inherited-pkg-dirs (ipd) for the zone and then get the
 * list of pkgs that deliver into those dirs.
 */
static int
get_ipd_pkgs(zone_dochandle_t handle, char ***pkg_list, int *cnt)
{
	int	res;
	struct zone_fstab fstab;
	int	ipd_cnt = 0;
	char	**ipds = NULL;
	int	pkg_cnt = 0;
	char	**pkgs = NULL;
	int	i;

	if ((res = zonecfg_setipdent(handle)) != Z_OK)
		return (res);

	while (zonecfg_getipdent(handle, &fstab) == Z_OK) {
		char	**p;
		int	len;

		if ((p = (char **)realloc(ipds,
		    sizeof (char *) * (ipd_cnt + 2))) == NULL) {
			res = Z_NOMEM;
			break;
		}
		ipds = p;

		if ((ipds[ipd_cnt] = strdup(fstab.zone_fs_dir)) == NULL) {
			res = Z_NOMEM;
			break;
		}
		ipd_cnt++;

		len = strlen(fstab.zone_fs_dir) + 3;
		if ((ipds[ipd_cnt] = malloc(len)) == NULL) {
			res = Z_NOMEM;
			break;
		}

		(void) snprintf(ipds[ipd_cnt], len, "%s/*", fstab.zone_fs_dir);
		ipd_cnt++;
	}

	(void) zonecfg_endipdent(handle);

	if (res != Z_OK) {
		for (i = 0; i < ipd_cnt; i++)
			free(ipds[i]);
		free(ipds);
		return (res);
	}

	/* We only have to process the contents file if we have ipds. */
	if (ipd_cnt > 0) {
		FILE	*fp;

		if ((fp = fopen(CONTENTS_FILE, "r")) != NULL) {
			char	*buf;

			while ((buf = read_pkg_data(fp)) != NULL) {
				res = get_path_pkgs(buf, ipds, ipd_cnt, &pkgs,
				    &pkg_cnt);
				free(buf);
				if (res != Z_OK)
					break;
			}

			(void) fclose(fp);
		}
	}

	for (i = 0; i < ipd_cnt; i++)
		free(ipds[i]);
	free(ipds);

	if (res != Z_OK) {
		free_ipd_pkgs(pkgs, pkg_cnt);
	} else {
		*pkg_list = pkgs;
		*cnt = pkg_cnt;
	}

	return (res);
}

/*
 * Return true if pkg_name is in the list of pkgs that deliver into an
 * inherited pkg directory for the zone.
 */
static boolean_t
dir_pkg(char *pkg_name, char **pkg_list, int cnt)
{
	int i;

	for (i = 0; i < cnt; i++) {
		if (strcmp(pkg_name, pkg_list[i]) == 0)
			return (B_TRUE);
	}

	return (B_FALSE);
}

/*
 * Start by adding the patch to the sw inventory on the handle.
 *
 * The info parameter will be the portion of the PATCH_INFO_ entry following
 * the '='.  For example:
 * Installed: Wed Dec  7 07:13:51 PST 2005 From: mum Obsoletes: 120777-03 \
 *	121087-02 119108-07 Requires: 119575-02 119255-06 Incompatibles:
 *
 * We also want to add the Obsolete and Incompatible patches to the
 * sw inventory description of this patch.
 */
static int
add_patch(zone_dochandle_t handle, char *patch, char *info)
{
	xmlNodePtr	node;
	xmlNodePtr	cur;
	int		err;
	char		*p;
	char		*lastp;
	boolean_t	add_info = B_FALSE;
	boolean_t	obsolete;

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	cur = handle->zone_dh_cur;
	node = xmlNewTextChild(cur, NULL, DTD_ELEM_PATCH, NULL);
	if ((err = newprop(node, DTD_ATTR_ID, patch)) != Z_OK)
		return (err);

	/*
	 * Start with the first token.  This will probably be "Installed:".
	 * If we can't tokenize this entry, just return.
	 */
	if ((p = strtok_r(info, " ", &lastp)) == NULL)
		return (Z_OK);

	do {
		xmlNodePtr new_node;
		char	*nlp;

		if (strcmp(p, "Installed:") == 0 ||
		    strcmp(p, "Requires:") == 0 ||
		    strcmp(p, "From:") == 0) {
			add_info = B_FALSE;
			continue;
		} else if (strcmp(p, "Obsoletes:") == 0) {
			obsolete = B_TRUE;
			add_info = B_TRUE;
			continue;
		} else if (strcmp(p, "Incompatibles:") == 0) {
			obsolete = B_FALSE;
			add_info = B_TRUE;
			continue;
		}

		if (!add_info)
			continue;

		/* strip newline from last patch in the line */
		nlp = (p + strlen(p) - 1);
		if (*nlp == '\n')
			*nlp = '\0';

		if (obsolete)
			new_node = xmlNewTextChild(node, NULL,
			    DTD_ELEM_OBSOLETES, NULL);
		else
			new_node = xmlNewTextChild(node, NULL,
			    DTD_ELEM_INCOMPATIBLE, NULL);

		if ((err = newprop(new_node, DTD_ATTR_ID, p)) != Z_OK)
			return (err);

	} while ((p = strtok_r(NULL, " ", &lastp)) != NULL);

	return (Z_OK);
}

static boolean_t
unique_patch(zone_dochandle_t handle, char *patch)
{
	xmlNodePtr	cur;
	char		id[MAXNAMELEN];

	cur = xmlDocGetRootElement(handle->zone_dh_doc);
	for (cur = cur->xmlChildrenNode; cur != NULL; cur = cur->next) {
		if (xmlStrcmp(cur->name, DTD_ELEM_PATCH) == 0) {
			if (fetchprop(cur, DTD_ATTR_ID, id, sizeof (id))
			    != Z_OK)
				continue;

			if (strcmp(patch, id) == 0)
				return (B_FALSE);
		}
	}

	return (B_TRUE);
}

/*
 * Add the unique patches associated with this pkg to the sw inventory on the
 * handle.
 *
 * We are processing entries of the form:
 * PATCH_INFO_121454-02=Installed: Wed Dec  7 07:13:51 PST 2005 From: mum \
 *	Obsoletes: 120777-03 121087-02 119108-07 Requires: 119575-02 \
 *	119255-06 Incompatibles:
 *
 */
static int
add_patches(zone_dochandle_t handle, struct zone_pkginfo *infop)
{
	int i;
	int res = Z_OK;

	for (i = 0; i < infop->zpi_patch_cnt; i++) {
		char *p, *ep;

		if (strlen(infop->zpi_patchinfo[i]) < (sizeof (PATCHINFO) - 1))
			continue;

		/* Skip over "PATCH_INFO_" to get the patch id. */
		p = infop->zpi_patchinfo[i] + sizeof (PATCHINFO) - 1;
		if ((ep = strchr(p, '=')) == NULL)
			continue;

		*ep = '\0';
		if (unique_patch(handle, p))
			res = add_patch(handle, p, ep + 1);
	}

	return (res);
}

/*
 * Add the pkg to the sw inventory on the handle.
 */
static int
add_pkg(zone_dochandle_t handle, char *name, char *version)
{
	xmlNodePtr newnode;
	xmlNodePtr cur;
	int err;

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	cur = handle->zone_dh_cur;
	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_PACKAGE, NULL);
	if ((err = newprop(newnode, DTD_ATTR_NAME, name)) != Z_OK)
		return (err);
	if ((err = newprop(newnode, DTD_ATTR_VERSION, version)) != Z_OK)
		return (err);
	return (Z_OK);
}

static void
free_pkginfo(struct zone_pkginfo *infop)
{
	free(infop->zpi_version);
	if (infop->zpi_patch_cnt > 0) {
		int i;

		for (i = 0; i < infop->zpi_patch_cnt; i++)
			free(infop->zpi_patchinfo[i]);
		free(infop->zpi_patchinfo);
	}
}

/*
 * Read the pkginfo file and populate the structure with the data we need
 * from this pkg for a sw inventory.
 */
static int
get_pkginfo(char *pkginfo, struct zone_pkginfo *infop)
{
	FILE	*fp;
	char	*buf;
	int	err = 0;

	infop->zpi_all_zones = B_FALSE;
	infop->zpi_this_zone = B_FALSE;
	infop->zpi_version = NULL;
	infop->zpi_patch_cnt = 0;
	infop->zpi_patchinfo = NULL;

	if ((fp = fopen(pkginfo, "r")) == NULL)
		return (errno);

	while ((buf = read_pkg_data(fp)) != NULL) {
		if (strncmp(buf, VERSION, sizeof (VERSION) - 1) == 0) {
			int len;

			if ((infop->zpi_version =
			    strdup(buf + sizeof (VERSION) - 1)) == NULL) {
				err = ENOMEM;
				break;
			}

			/* remove trailing newline */
			len = strlen(infop->zpi_version);
			*(infop->zpi_version + len - 1) = 0;

		} else if (strcmp(buf, ALL_ZONES) == 0) {
			infop->zpi_all_zones = B_TRUE;

		} else if (strcmp(buf, THIS_ZONE) == 0) {
			infop->zpi_this_zone = B_TRUE;

		} else if (strncmp(buf, PATCHINFO, sizeof (PATCHINFO) - 1)
		    == 0) {
			char **p;

			if ((p = (char **)realloc(infop->zpi_patchinfo,
			    sizeof (char *) * (infop->zpi_patch_cnt + 1)))
			    == NULL) {
				err = ENOMEM;
				break;
			}
			infop->zpi_patchinfo = p;

			if ((infop->zpi_patchinfo[infop->zpi_patch_cnt] =
			    strdup(buf)) == NULL) {
				err = ENOMEM;
				break;
			}
			infop->zpi_patch_cnt++;
		}

		free(buf);
	}

	free(buf);

	if (errno == ENOMEM) {
		err = ENOMEM;
		/* Clean up anything we did manage to allocate. */
		free_pkginfo(infop);
	}

	(void) fclose(fp);

	return (err);
}

/*
 * Take a software inventory of the global zone.  We need to get the set of
 * packages and patches that are on the global zone that the specified
 * non-global zone depends on.  The packages we need in the inventory are:
 *
 * - skip the package if SUNW_PKG_THISZONE is 'true'
 * otherwise,
 * - add the package if
 * a) SUNW_PKG_ALLZONES is 'true',
 * or
 * b) any file delivered by the package is in a file system that is inherited
 * from the global zone.
 * If the zone does not inherit any file systems (whole root)
 * then (b) will be skipped.
 *
 * For each of the packages that is being added to the inventory, we will also
 * add all of the associated, unique patches to the inventory.
 */
static int
zonecfg_sw_inventory(zone_dochandle_t handle)
{
	char		pkginfo[MAXPATHLEN];
	int		res;
	struct dirent	*dp;
	DIR		*dirp;
	struct stat	buf;
	struct zone_pkginfo	info;
	int		pkg_cnt = 0;
	char		**pkgs = NULL;

	if ((res = get_ipd_pkgs(handle, &pkgs, &pkg_cnt)) != Z_OK)
		return (res);

	if ((dirp = opendir(PKG_PATH)) == NULL) {
		free_ipd_pkgs(pkgs, pkg_cnt);
		return (Z_OK);
	}

	while ((dp = readdir(dirp)) != (struct dirent *)0) {
		if (strcmp(dp->d_name, ".") == 0 ||
		    strcmp(dp->d_name, "..") == 0)
			continue;

		(void) snprintf(pkginfo, sizeof (pkginfo), "%s/%s/pkginfo",
		    PKG_PATH, dp->d_name);

		if (stat(pkginfo, &buf) == -1 || !S_ISREG(buf.st_mode))
			continue;

		if (get_pkginfo(pkginfo, &info) != 0) {
			res = Z_NOMEM;
			break;
		}

		if (!info.zpi_this_zone &&
		    (info.zpi_all_zones ||
		    dir_pkg(dp->d_name, pkgs, pkg_cnt))) {
			if ((res = add_pkg(handle, dp->d_name,
			    info.zpi_version)) == Z_OK) {
				if (info.zpi_patch_cnt > 0)
					res = add_patches(handle, &info);
			}
		}

		free_pkginfo(&info);

		if (res != Z_OK)
			break;
	}

	(void) closedir(dirp);

	free_ipd_pkgs(pkgs, pkg_cnt);

	if (res == Z_OK)
		handle->zone_dh_sw_inv = B_TRUE;

	return (res);
}

/*
 * zonecfg_devwalk call-back function used during detach to generate the
 * dev info in the manifest.
 */
static int
get_detach_dev_entry(const char *name, uid_t uid, gid_t gid, mode_t mode,
    const char *acl, void *hdl)
{
	zone_dochandle_t handle = (zone_dochandle_t)hdl;
	xmlNodePtr newnode;
	xmlNodePtr cur;
	int err;
	char buf[128];

	if ((err = operation_prep(handle)) != Z_OK)
		return (err);

	cur = handle->zone_dh_cur;
	newnode = xmlNewTextChild(cur, NULL, DTD_ELEM_DEV_PERM, NULL);
	if ((err = newprop(newnode, DTD_ATTR_NAME, (char *)name)) != Z_OK)
		return (err);
	(void) snprintf(buf, sizeof (buf), "%lu", uid);
	if ((err = newprop(newnode, DTD_ATTR_UID, buf)) != Z_OK)
		return (err);
	(void) snprintf(buf, sizeof (buf), "%lu", gid);
	if ((err = newprop(newnode, DTD_ATTR_GID, buf)) != Z_OK)
		return (err);
	(void) snprintf(buf, sizeof (buf), "%o", mode);
	if ((err = newprop(newnode, DTD_ATTR_MODE, buf)) != Z_OK)
		return (err);
	if ((err = newprop(newnode, DTD_ATTR_ACL, (char *)acl)) != Z_OK)
		return (err);
	return (Z_OK);
}

/*
 * Get the information required to support detaching a zone.  This is
 * called on the source system when detaching (the detaching parameter should
 * be set to true) and on the destination system before attaching (the
 * detaching parameter should be false).
 *
 * For native Solaris zones, the detach/attach process involves validating
 * that the software on the global zone can support the zone when we attach.
 * To do this we take a software inventory of the global zone.  We also
 * have to keep track of the device configuration so that we can properly
 * recreate it on the destination.
 */
int
zonecfg_get_detach_info(zone_dochandle_t handle, boolean_t detaching)
{
	int		res;

	if ((res = zonecfg_sw_inventory(handle)) != Z_OK)
		return (res);

	if (detaching)
		res = zonecfg_devwalk(handle, get_detach_dev_entry, handle);

	return (res);
}