/*	$NetBSD: makefs.c,v 1.26 2006/10/22 21:11:56 christos Exp $	*/

/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (c) 2001-2003 Wasabi Systems, Inc.
 * All rights reserved.
 *
 * Written by Luke Mewburn for Wasabi Systems, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed for the NetBSD Project by
 *      Wasabi Systems, Inc.
 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <stdbool.h>
#include <util.h>

#include "makefs.h"
#include "mtree.h"

/*
 * list of supported file systems and dispatch functions
 */
typedef struct {
	const char	*type;
	void		(*prepare_options)(fsinfo_t *);
	int		(*parse_options)(const char *, fsinfo_t *);
	void		(*cleanup_options)(fsinfo_t *);
	void		(*make_fs)(const char *, const char *, fsnode *,
				fsinfo_t *);
} fstype_t;

static fstype_t fstypes[] = {
#define ENTRY(name) { \
	# name, name ## _prep_opts, name ## _parse_opts, \
	name ## _cleanup_opts, name ## _makefs  \
}
	ENTRY(cd9660),
	ENTRY(ffs),
	ENTRY(msdos),
#ifdef HAVE_ZFS
	ENTRY(zfs),
#endif
	{ .type = NULL	},
};

u_int		debug;
int		dupsok;
struct timespec	start_time;
struct stat stampst;

static	fstype_t *get_fstype(const char *);
static int get_tstamp(const char *, struct stat *);
static	void	usage(fstype_t *, fsinfo_t *);

int
main(int argc, char *argv[])
{
	struct stat	 sb;
	struct timeval	 start;
	fstype_t	*fstype;
	fsinfo_t	 fsoptions;
	fsnode		*root;
	int		 ch, i, len;
	const char	*subtree;
	const char	*specfile;

	setprogname(argv[0]);

	debug = 0;
	if ((fstype = get_fstype(DEFAULT_FSTYPE)) == NULL)
		errx(1, "Unknown default fs type `%s'.", DEFAULT_FSTYPE);

		/* set default fsoptions */
	(void)memset(&fsoptions, 0, sizeof(fsoptions));
	fsoptions.fd = -1;
	fsoptions.sectorsize = -1;

	if (fstype->prepare_options)
		fstype->prepare_options(&fsoptions);

	specfile = NULL;
#ifdef CLOCK_REALTIME
	ch = clock_gettime(CLOCK_REALTIME, &start_time);
#else
	ch = gettimeofday(&start, NULL);
	start_time.tv_sec = start.tv_sec;
	start_time.tv_nsec = start.tv_usec * 1000;
#endif
	if (ch == -1)
		err(1, "Unable to get system time");


	while ((ch = getopt(argc, argv, "B:b:Dd:f:F:M:m:N:O:o:pR:s:S:t:T:xZ")) != -1) {
		switch (ch) {

		case 'B':
			if (strcmp(optarg, "be") == 0 ||
			    strcmp(optarg, "4321") == 0 ||
			    strcmp(optarg, "big") == 0) {
#if BYTE_ORDER == LITTLE_ENDIAN
				fsoptions.needswap = 1;
#endif
			} else if (strcmp(optarg, "le") == 0 ||
			    strcmp(optarg, "1234") == 0 ||
			    strcmp(optarg, "little") == 0) {
#if BYTE_ORDER == BIG_ENDIAN
				fsoptions.needswap = 1;
#endif
			} else {
				warnx("Invalid endian `%s'.", optarg);
				usage(fstype, &fsoptions);
			}
			break;

		case 'b':
			len = strlen(optarg) - 1;
			if (optarg[len] == '%') {
				optarg[len] = '\0';
				fsoptions.freeblockpc =
				    strsuftoll("free block percentage",
					optarg, 0, 99);
			} else {
				fsoptions.freeblocks =
				    strsuftoll("free blocks",
					optarg, 0, LLONG_MAX);
			}
			break;

		case 'D':
			dupsok++;
			break;

		case 'd':
			debug = strtoll(optarg, NULL, 0);
			break;

		case 'f':
			len = strlen(optarg) - 1;
			if (optarg[len] == '%') {
				optarg[len] = '\0';
				fsoptions.freefilepc =
				    strsuftoll("free file percentage",
					optarg, 0, 99);
			} else {
				fsoptions.freefiles =
				    strsuftoll("free files",
					optarg, 0, LLONG_MAX);
			}
			break;

		case 'F':
			specfile = optarg;
			break;

		case 'M':
			fsoptions.minsize =
			    strsuftoll("minimum size", optarg, 1LL, LLONG_MAX);
			break;

		case 'N':
			if (! setup_getid(optarg))
				errx(1,
			    "Unable to use user and group databases in `%s'",
				    optarg);
			break;

		case 'm':
			fsoptions.maxsize =
			    strsuftoll("maximum size", optarg, 1LL, LLONG_MAX);
			break;

		case 'O':
			fsoptions.offset =
			    strsuftoll("offset", optarg, 0LL, LLONG_MAX);
			break;

		case 'o':
		{
			char *p;

			while ((p = strsep(&optarg, ",")) != NULL) {
				if (*p == '\0')
					errx(1, "Empty option");
				if (! fstype->parse_options(p, &fsoptions))
					usage(fstype, &fsoptions);
			}
			break;
		}
		case 'p':
			/* Deprecated in favor of 'Z' */
			fsoptions.sparse = 1;
			break;

		case 'R':
			/* Round image size up to specified block size */
			fsoptions.roundup =
			    strsuftoll("roundup-size", optarg, 0, LLONG_MAX);
			break;

		case 's':
			fsoptions.minsize = fsoptions.maxsize =
			    strsuftoll("size", optarg, 1LL, LLONG_MAX);
			break;

		case 'S':
			fsoptions.sectorsize =
			    (int)strsuftoll("sector size", optarg,
				1LL, INT_MAX);
			break;

		case 't':
			/* Check current one and cleanup if necessary. */
			if (fstype->cleanup_options)
				fstype->cleanup_options(&fsoptions);
			fsoptions.fs_specific = NULL;
			if ((fstype = get_fstype(optarg)) == NULL)
				errx(1, "Unknown fs type `%s'.", optarg);
			fstype->prepare_options(&fsoptions);
			break;

		case 'T':
			if (get_tstamp(optarg, &stampst) == -1)
				errx(1, "Cannot get timestamp from `%s'",
				    optarg);
			break;

		case 'x':
			fsoptions.onlyspec = 1;
			break;

		case 'Z':
			/* Superscedes 'p' for compatibility with NetBSD makefs(8) */
			fsoptions.sparse = 1;
			break;

		default:
			usage(fstype, &fsoptions);
			/* NOTREACHED */

		}
	}
	if (debug) {
		printf("debug mask: 0x%08x\n", debug);
		printf("start time: %ld.%ld, %s",
		    (long)start_time.tv_sec, (long)start_time.tv_nsec,
		    ctime(&start_time.tv_sec));
	}
	argc -= optind;
	argv += optind;

	if (argc < 2)
		usage(fstype, &fsoptions);

	/* -x must be accompanied by -F */
	if (fsoptions.onlyspec != 0 && specfile == NULL)
		errx(1, "-x requires -F mtree-specfile.");

	/* Accept '-' as meaning "read from standard input". */
	if (strcmp(argv[1], "-") == 0)
		sb.st_mode = S_IFREG;
	else {
		if (stat(argv[1], &sb) == -1)
			err(1, "Can't stat `%s'", argv[1]);
	}

	switch (sb.st_mode & S_IFMT) {
	case S_IFDIR:		/* walk the tree */
		subtree = argv[1];
		TIMER_START(start);
		root = walk_dir(subtree, ".", NULL, NULL);
		TIMER_RESULTS(start, "walk_dir");
		break;
	case S_IFREG:		/* read the manifest file */
		subtree = ".";
		TIMER_START(start);
		root = read_mtree(argv[1], NULL);
		TIMER_RESULTS(start, "manifest");
		break;
	default:
		errx(1, "%s: not a file or directory", argv[1]);
		/* NOTREACHED */
	}

	/* append extra directory */
	for (i = 2; i < argc; i++) {
		if (stat(argv[i], &sb) == -1)
			err(1, "Can't stat `%s'", argv[i]);
		if (!S_ISDIR(sb.st_mode))
			errx(1, "%s: not a directory", argv[i]);
		TIMER_START(start);
		root = walk_dir(argv[i], ".", NULL, root);
		TIMER_RESULTS(start, "walk_dir2");
	}

	if (specfile) {		/* apply a specfile */
		TIMER_START(start);
		apply_specfile(specfile, subtree, root, fsoptions.onlyspec);
		TIMER_RESULTS(start, "apply_specfile");
	}

	if (debug & DEBUG_DUMP_FSNODES) {
		printf("\nparent: %s\n", subtree);
		dump_fsnodes(root);
		putchar('\n');
	}

				/* build the file system */
	TIMER_START(start);
	fstype->make_fs(argv[0], subtree, root, &fsoptions);
	TIMER_RESULTS(start, "make_fs");

	free_fsnodes(root);

	exit(0);
	/* NOTREACHED */
}

int
set_option(const option_t *options, const char *option, char *buf, size_t len)
{
	char *var, *val;
	int retval;

	assert(option != NULL);

	var = estrdup(option);
	for (val = var; *val; val++)
		if (*val == '=') {
			*val++ = '\0';
			break;
		}
	retval = set_option_var(options, var, val, buf, len);
	free(var);
	return retval;
}

int
set_option_var(const option_t *options, const char *var, const char *val,
    char *buf, size_t len)
{
	char *s;
	size_t i;

#define NUM(type) \
	if (!*val) { \
		*(type *)options[i].value = 1; \
		break; \
	} \
	*(type *)options[i].value = (type)strsuftoll(options[i].desc, val, \
	    options[i].minimum, options[i].maximum); break

	for (i = 0; options[i].name != NULL; i++) {
		if (var[1] == '\0') {
			if (options[i].letter != var[0])
				continue;
		} else if (strcmp(options[i].name, var) != 0)
			continue;
		switch (options[i].type) {
		case OPT_BOOL:
			*(bool *)options[i].value = 1;
			break;
		case OPT_STRARRAY:
			strlcpy((void *)options[i].value, val, (size_t)
			    options[i].maximum);
			break;
		case OPT_STRPTR:
			s = estrdup(val);
			*(char **)options[i].value = s;
			break;
		case OPT_STRBUF:
			if (buf == NULL)
				abort();
			strlcpy(buf, val, len);
			break;
		case OPT_INT64:
			NUM(uint64_t);
		case OPT_INT32:
			NUM(uint32_t);
		case OPT_INT16:
			NUM(uint16_t);
		case OPT_INT8:
			NUM(uint8_t);
		default:
			warnx("Unknown type %d in option %s", options[i].type,
			    val);
			return 0;
		}
		return i;
	}
	warnx("Unknown option `%s'", var);
	return -1;
}


static fstype_t *
get_fstype(const char *type)
{
	int i;
	
	for (i = 0; fstypes[i].type != NULL; i++)
		if (strcmp(fstypes[i].type, type) == 0)
			return (&fstypes[i]);
	return (NULL);
}

option_t *
copy_opts(const option_t *o)
{
	size_t i;

	for (i = 0; o[i].name; i++)
		continue;
	i++;
	return memcpy(ecalloc(i, sizeof(*o)), o, i * sizeof(*o));
}

static int
get_tstamp(const char *b, struct stat *st)
{
	time_t when;
	char *eb;
	long long l;

	if (stat(b, st) != -1)
		return 0;

	{
		errno = 0;
		l = strtoll(b, &eb, 0);
		if (b == eb || *eb || errno)
			return -1;
		when = (time_t)l;
	}

	st->st_ino = 1;
#ifdef HAVE_STRUCT_STAT_BIRTHTIME
	st->st_birthtime =
#endif
	st->st_mtime = st->st_ctime = st->st_atime = when;
	return 0;
}

static void
usage(fstype_t *fstype, fsinfo_t *fsoptions)
{
	const char *prog;

	prog = getprogname();
	fprintf(stderr,
"Usage: %s [-xZ] [-B endian] [-b free-blocks] [-d debug-mask]\n"
"\t[-F mtree-specfile] [-f free-files] [-M minimum-size] [-m maximum-size]\n"
"\t[-N userdb-dir] [-O offset] [-o fs-options] [-R roundup-size]\n"
"\t[-S sector-size] [-s image-size] [-T <timestamp/file>] [-t fs-type]\n"
"\timage-file directory | manifest [extra-directory ...]\n",
	    prog);

	if (fstype) {
		size_t i;
		option_t *o = fsoptions->fs_options;

		fprintf(stderr, "\n%s specific options:\n", fstype->type);
		for (i = 0; o[i].name != NULL; i++)
			fprintf(stderr, "\t%c%c%20.20s\t%s\n",
			    o[i].letter ? o[i].letter : ' ',
			    o[i].letter ? ',' : ' ',
			    o[i].name, o[i].desc);
	}
	exit(1);
}