xref: /freebsd/bin/pax/cache.c (revision 40feca3a9979694e450bf3da5bbc6cf192ce878b)
14b88c807SRodney W. Grimes /*-
24b88c807SRodney W. Grimes  * Copyright (c) 1992 Keith Muller.
34b88c807SRodney W. Grimes  * Copyright (c) 1992, 1993
44b88c807SRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
54b88c807SRodney W. Grimes  *
64b88c807SRodney W. Grimes  * This code is derived from software contributed to Berkeley by
74b88c807SRodney W. Grimes  * Keith Muller of the University of California, San Diego.
84b88c807SRodney W. Grimes  *
94b88c807SRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
104b88c807SRodney W. Grimes  * modification, are permitted provided that the following conditions
114b88c807SRodney W. Grimes  * are met:
124b88c807SRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
134b88c807SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
144b88c807SRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
154b88c807SRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
164b88c807SRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
174b88c807SRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
184b88c807SRodney W. Grimes  *    must display the following acknowledgement:
194b88c807SRodney W. Grimes  *	This product includes software developed by the University of
204b88c807SRodney W. Grimes  *	California, Berkeley and its contributors.
214b88c807SRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
224b88c807SRodney W. Grimes  *    may be used to endorse or promote products derived from this software
234b88c807SRodney W. Grimes  *    without specific prior written permission.
244b88c807SRodney W. Grimes  *
254b88c807SRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
264b88c807SRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
274b88c807SRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
284b88c807SRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
294b88c807SRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
304b88c807SRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
314b88c807SRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
324b88c807SRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
334b88c807SRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
344b88c807SRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
354b88c807SRodney W. Grimes  * SUCH DAMAGE.
364b88c807SRodney W. Grimes  */
374b88c807SRodney W. Grimes 
384b88c807SRodney W. Grimes #ifndef lint
39c9a8d1f4SPhilippe Charnier #if 0
40c9a8d1f4SPhilippe Charnier static char sccsid[] = "@(#)cache.c	8.1 (Berkeley) 5/31/93";
41c9a8d1f4SPhilippe Charnier #endif
424b88c807SRodney W. Grimes #endif /* not lint */
432749b141SDavid E. O'Brien #include <sys/cdefs.h>
442749b141SDavid E. O'Brien __FBSDID("$FreeBSD$");
454b88c807SRodney W. Grimes 
464b88c807SRodney W. Grimes #include <sys/types.h>
474b88c807SRodney W. Grimes #include <sys/stat.h>
484b88c807SRodney W. Grimes #include <string.h>
494b88c807SRodney W. Grimes #include <stdio.h>
504b88c807SRodney W. Grimes #include <pwd.h>
514b88c807SRodney W. Grimes #include <grp.h>
524b88c807SRodney W. Grimes #include <unistd.h>
534b88c807SRodney W. Grimes #include <stdlib.h>
544b88c807SRodney W. Grimes #include "pax.h"
554b88c807SRodney W. Grimes #include "cache.h"
564b88c807SRodney W. Grimes #include "extern.h"
574b88c807SRodney W. Grimes 
584b88c807SRodney W. Grimes /*
594b88c807SRodney W. Grimes  * routines that control user, group, uid and gid caches (for the archive
604b88c807SRodney W. Grimes  * member print routine).
614b88c807SRodney W. Grimes  * IMPORTANT:
624b88c807SRodney W. Grimes  * these routines cache BOTH hits and misses, a major performance improvement
634b88c807SRodney W. Grimes  */
644b88c807SRodney W. Grimes 
654b88c807SRodney W. Grimes static	int pwopn = 0;		/* is password file open */
664b88c807SRodney W. Grimes static	int gropn = 0;		/* is group file open */
674b88c807SRodney W. Grimes static UIDC **uidtb = NULL;	/* uid to name cache */
684b88c807SRodney W. Grimes static GIDC **gidtb = NULL;	/* gid to name cache */
694b88c807SRodney W. Grimes static UIDC **usrtb = NULL;	/* user name to uid cache */
704b88c807SRodney W. Grimes static GIDC **grptb = NULL;	/* group name to gid cache */
714b88c807SRodney W. Grimes 
724b88c807SRodney W. Grimes /*
734b88c807SRodney W. Grimes  * uidtb_start
744b88c807SRodney W. Grimes  *	creates an an empty uidtb
754b88c807SRodney W. Grimes  * Return:
764b88c807SRodney W. Grimes  *	0 if ok, -1 otherwise
774b88c807SRodney W. Grimes  */
784b88c807SRodney W. Grimes 
794b88c807SRodney W. Grimes int
804b88c807SRodney W. Grimes uidtb_start(void)
814b88c807SRodney W. Grimes {
824b88c807SRodney W. Grimes 	static int fail = 0;
834b88c807SRodney W. Grimes 
844b88c807SRodney W. Grimes 	if (uidtb != NULL)
854b88c807SRodney W. Grimes 		return(0);
864b88c807SRodney W. Grimes 	if (fail)
874b88c807SRodney W. Grimes 		return(-1);
884b88c807SRodney W. Grimes 	if ((uidtb = (UIDC **)calloc(UID_SZ, sizeof(UIDC *))) == NULL) {
894b88c807SRodney W. Grimes 		++fail;
90778766feSKris Kennaway 		paxwarn(1, "Unable to allocate memory for user id cache table");
914b88c807SRodney W. Grimes 		return(-1);
924b88c807SRodney W. Grimes 	}
934b88c807SRodney W. Grimes 	return(0);
944b88c807SRodney W. Grimes }
954b88c807SRodney W. Grimes 
964b88c807SRodney W. Grimes /*
974b88c807SRodney W. Grimes  * gidtb_start
984b88c807SRodney W. Grimes  *	creates an an empty gidtb
994b88c807SRodney W. Grimes  * Return:
1004b88c807SRodney W. Grimes  *	0 if ok, -1 otherwise
1014b88c807SRodney W. Grimes  */
1024b88c807SRodney W. Grimes 
1034b88c807SRodney W. Grimes int
1044b88c807SRodney W. Grimes gidtb_start(void)
1054b88c807SRodney W. Grimes {
1064b88c807SRodney W. Grimes 	static int fail = 0;
1074b88c807SRodney W. Grimes 
1084b88c807SRodney W. Grimes 	if (gidtb != NULL)
1094b88c807SRodney W. Grimes 		return(0);
1104b88c807SRodney W. Grimes 	if (fail)
1114b88c807SRodney W. Grimes 		return(-1);
1124b88c807SRodney W. Grimes 	if ((gidtb = (GIDC **)calloc(GID_SZ, sizeof(GIDC *))) == NULL) {
1134b88c807SRodney W. Grimes 		++fail;
114778766feSKris Kennaway 		paxwarn(1, "Unable to allocate memory for group id cache table");
1154b88c807SRodney W. Grimes 		return(-1);
1164b88c807SRodney W. Grimes 	}
1174b88c807SRodney W. Grimes 	return(0);
1184b88c807SRodney W. Grimes }
1194b88c807SRodney W. Grimes 
1204b88c807SRodney W. Grimes /*
1214b88c807SRodney W. Grimes  * usrtb_start
1224b88c807SRodney W. Grimes  *	creates an an empty usrtb
1234b88c807SRodney W. Grimes  * Return:
1244b88c807SRodney W. Grimes  *	0 if ok, -1 otherwise
1254b88c807SRodney W. Grimes  */
1264b88c807SRodney W. Grimes 
1274b88c807SRodney W. Grimes int
1284b88c807SRodney W. Grimes usrtb_start(void)
1294b88c807SRodney W. Grimes {
1304b88c807SRodney W. Grimes 	static int fail = 0;
1314b88c807SRodney W. Grimes 
1324b88c807SRodney W. Grimes 	if (usrtb != NULL)
1334b88c807SRodney W. Grimes 		return(0);
1344b88c807SRodney W. Grimes 	if (fail)
1354b88c807SRodney W. Grimes 		return(-1);
1364b88c807SRodney W. Grimes 	if ((usrtb = (UIDC **)calloc(UNM_SZ, sizeof(UIDC *))) == NULL) {
1374b88c807SRodney W. Grimes 		++fail;
138778766feSKris Kennaway 		paxwarn(1, "Unable to allocate memory for user name cache table");
1394b88c807SRodney W. Grimes 		return(-1);
1404b88c807SRodney W. Grimes 	}
1414b88c807SRodney W. Grimes 	return(0);
1424b88c807SRodney W. Grimes }
1434b88c807SRodney W. Grimes 
1444b88c807SRodney W. Grimes /*
1454b88c807SRodney W. Grimes  * grptb_start
1464b88c807SRodney W. Grimes  *	creates an an empty grptb
1474b88c807SRodney W. Grimes  * Return:
1484b88c807SRodney W. Grimes  *	0 if ok, -1 otherwise
1494b88c807SRodney W. Grimes  */
1504b88c807SRodney W. Grimes 
1514b88c807SRodney W. Grimes int
1524b88c807SRodney W. Grimes grptb_start(void)
1534b88c807SRodney W. Grimes {
1544b88c807SRodney W. Grimes 	static int fail = 0;
1554b88c807SRodney W. Grimes 
1564b88c807SRodney W. Grimes 	if (grptb != NULL)
1574b88c807SRodney W. Grimes 		return(0);
1584b88c807SRodney W. Grimes 	if (fail)
1594b88c807SRodney W. Grimes 		return(-1);
1604b88c807SRodney W. Grimes 	if ((grptb = (GIDC **)calloc(GNM_SZ, sizeof(GIDC *))) == NULL) {
1614b88c807SRodney W. Grimes 		++fail;
162778766feSKris Kennaway 		paxwarn(1,"Unable to allocate memory for group name cache table");
1634b88c807SRodney W. Grimes 		return(-1);
1644b88c807SRodney W. Grimes 	}
1654b88c807SRodney W. Grimes 	return(0);
1664b88c807SRodney W. Grimes }
1674b88c807SRodney W. Grimes 
1684b88c807SRodney W. Grimes /*
1694b88c807SRodney W. Grimes  * name_uid()
1704b88c807SRodney W. Grimes  *	caches the name (if any) for the uid. If frc set, we always return the
1714b88c807SRodney W. Grimes  *	the stored name (if valid or invalid match). We use a simple hash table.
1724b88c807SRodney W. Grimes  * Return
1739d5abbddSJens Schweikhardt  *	Pointer to stored name (or an empty string).
1744b88c807SRodney W. Grimes  */
1754b88c807SRodney W. Grimes 
17640feca3aSMark Murray const char *
1774b88c807SRodney W. Grimes name_uid(uid_t uid, int frc)
1784b88c807SRodney W. Grimes {
179f789b261SWarner Losh 	struct passwd *pw;
180f789b261SWarner Losh 	UIDC *ptr;
1814b88c807SRodney W. Grimes 
1824b88c807SRodney W. Grimes 	if ((uidtb == NULL) && (uidtb_start() < 0))
1834b88c807SRodney W. Grimes 		return("");
1844b88c807SRodney W. Grimes 
1854b88c807SRodney W. Grimes 	/*
1864b88c807SRodney W. Grimes 	 * see if we have this uid cached
1874b88c807SRodney W. Grimes 	 */
1884b88c807SRodney W. Grimes 	ptr = uidtb[uid % UID_SZ];
1894b88c807SRodney W. Grimes 	if ((ptr != NULL) && (ptr->valid > 0) && (ptr->uid == uid)) {
1904b88c807SRodney W. Grimes 		/*
1914b88c807SRodney W. Grimes 		 * have an entry for this uid
1924b88c807SRodney W. Grimes 		 */
1934b88c807SRodney W. Grimes 		if (frc || (ptr->valid == VALID))
1944b88c807SRodney W. Grimes 			return(ptr->name);
1954b88c807SRodney W. Grimes 		return("");
1964b88c807SRodney W. Grimes 	}
1974b88c807SRodney W. Grimes 
1984b88c807SRodney W. Grimes 	/*
1994b88c807SRodney W. Grimes 	 * No entry for this uid, we will add it
2004b88c807SRodney W. Grimes 	 */
2014b88c807SRodney W. Grimes 	if (!pwopn) {
2024b88c807SRodney W. Grimes 		setpassent(1);
2034b88c807SRodney W. Grimes 		++pwopn;
2044b88c807SRodney W. Grimes 	}
2054b88c807SRodney W. Grimes 	if (ptr == NULL)
2064b88c807SRodney W. Grimes 		ptr = (UIDC *)malloc(sizeof(UIDC));
2074b88c807SRodney W. Grimes 
2084b88c807SRodney W. Grimes 	if ((pw = getpwuid(uid)) == NULL) {
2094b88c807SRodney W. Grimes 		/*
2104b88c807SRodney W. Grimes 		 * no match for this uid in the local password file
21146be34b9SKris Kennaway 		 * a string that is the uid in numeric format
2124b88c807SRodney W. Grimes 		 */
2134b88c807SRodney W. Grimes 		if (ptr == NULL)
2144b88c807SRodney W. Grimes 			return("");
2154b88c807SRodney W. Grimes 		ptr->uid = uid;
2164b88c807SRodney W. Grimes 		ptr->valid = INVALID;
2174b88c807SRodney W. Grimes #		ifdef NET2_STAT
218778766feSKris Kennaway 		(void)snprintf(ptr->name, sizeof(ptr->name), "%u", uid);
2194b88c807SRodney W. Grimes #		else
220778766feSKris Kennaway 		(void)snprintf(ptr->name, sizeof(ptr->name), "%lu",
221778766feSKris Kennaway 			       (unsigned long)uid);
2224b88c807SRodney W. Grimes #		endif
2234b88c807SRodney W. Grimes 		if (frc == 0)
2244b88c807SRodney W. Grimes 			return("");
2254b88c807SRodney W. Grimes 	} else {
2264b88c807SRodney W. Grimes 		/*
2274b88c807SRodney W. Grimes 		 * there is an entry for this uid in the password file
2284b88c807SRodney W. Grimes 		 */
2294b88c807SRodney W. Grimes 		if (ptr == NULL)
2304b88c807SRodney W. Grimes 			return(pw->pw_name);
2314b88c807SRodney W. Grimes 		ptr->uid = uid;
232877155d0SPhilippe Charnier 		(void)strncpy(ptr->name, pw->pw_name, UNMLEN - 1);
2334b88c807SRodney W. Grimes 		ptr->name[UNMLEN-1] = '\0';
2344b88c807SRodney W. Grimes 		ptr->valid = VALID;
2354b88c807SRodney W. Grimes 	}
2364b88c807SRodney W. Grimes 	return(ptr->name);
2374b88c807SRodney W. Grimes }
2384b88c807SRodney W. Grimes 
2394b88c807SRodney W. Grimes /*
2404b88c807SRodney W. Grimes  * name_gid()
2414b88c807SRodney W. Grimes  *	caches the name (if any) for the gid. If frc set, we always return the
2424b88c807SRodney W. Grimes  *	the stored name (if valid or invalid match). We use a simple hash table.
2434b88c807SRodney W. Grimes  * Return
2449d5abbddSJens Schweikhardt  *	Pointer to stored name (or an empty string).
2454b88c807SRodney W. Grimes  */
2464b88c807SRodney W. Grimes 
24740feca3aSMark Murray const char *
2484b88c807SRodney W. Grimes name_gid(gid_t gid, int frc)
2494b88c807SRodney W. Grimes {
250f789b261SWarner Losh 	struct group *gr;
251f789b261SWarner Losh 	GIDC *ptr;
2524b88c807SRodney W. Grimes 
2534b88c807SRodney W. Grimes 	if ((gidtb == NULL) && (gidtb_start() < 0))
2544b88c807SRodney W. Grimes 		return("");
2554b88c807SRodney W. Grimes 
2564b88c807SRodney W. Grimes 	/*
2574b88c807SRodney W. Grimes 	 * see if we have this gid cached
2584b88c807SRodney W. Grimes 	 */
2594b88c807SRodney W. Grimes 	ptr = gidtb[gid % GID_SZ];
2604b88c807SRodney W. Grimes 	if ((ptr != NULL) && (ptr->valid > 0) && (ptr->gid == gid)) {
2614b88c807SRodney W. Grimes 		/*
2624b88c807SRodney W. Grimes 		 * have an entry for this gid
2634b88c807SRodney W. Grimes 		 */
2644b88c807SRodney W. Grimes 		if (frc || (ptr->valid == VALID))
2654b88c807SRodney W. Grimes 			return(ptr->name);
2664b88c807SRodney W. Grimes 		return("");
2674b88c807SRodney W. Grimes 	}
2684b88c807SRodney W. Grimes 
2694b88c807SRodney W. Grimes 	/*
2704b88c807SRodney W. Grimes 	 * No entry for this gid, we will add it
2714b88c807SRodney W. Grimes 	 */
2724b88c807SRodney W. Grimes 	if (!gropn) {
2734b88c807SRodney W. Grimes 		setgroupent(1);
2744b88c807SRodney W. Grimes 		++gropn;
2754b88c807SRodney W. Grimes 	}
2764b88c807SRodney W. Grimes 	if (ptr == NULL)
2774b88c807SRodney W. Grimes 		ptr = (GIDC *)malloc(sizeof(GIDC));
2784b88c807SRodney W. Grimes 
2794b88c807SRodney W. Grimes 	if ((gr = getgrgid(gid)) == NULL) {
2804b88c807SRodney W. Grimes 		/*
2814b88c807SRodney W. Grimes 		 * no match for this gid in the local group file, put in
28246be34b9SKris Kennaway 		 * a string that is the gid in numeric format
2834b88c807SRodney W. Grimes 		 */
2844b88c807SRodney W. Grimes 		if (ptr == NULL)
2854b88c807SRodney W. Grimes 			return("");
2864b88c807SRodney W. Grimes 		ptr->gid = gid;
2874b88c807SRodney W. Grimes 		ptr->valid = INVALID;
2884b88c807SRodney W. Grimes #		ifdef NET2_STAT
289778766feSKris Kennaway 		(void)snprintf(ptr->name, sizeof(ptr->name), "%u", gid);
2904b88c807SRodney W. Grimes #		else
291778766feSKris Kennaway 		(void)snprintf(ptr->name, sizeof(ptr->name), "%lu",
292778766feSKris Kennaway 			       (unsigned long)gid);
2934b88c807SRodney W. Grimes #		endif
2944b88c807SRodney W. Grimes 		if (frc == 0)
2954b88c807SRodney W. Grimes 			return("");
2964b88c807SRodney W. Grimes 	} else {
2974b88c807SRodney W. Grimes 		/*
2984b88c807SRodney W. Grimes 		 * there is an entry for this group in the group file
2994b88c807SRodney W. Grimes 		 */
3004b88c807SRodney W. Grimes 		if (ptr == NULL)
3014b88c807SRodney W. Grimes 			return(gr->gr_name);
3024b88c807SRodney W. Grimes 		ptr->gid = gid;
303877155d0SPhilippe Charnier 		(void)strncpy(ptr->name, gr->gr_name, GNMLEN - 1);
3044b88c807SRodney W. Grimes 		ptr->name[GNMLEN-1] = '\0';
3054b88c807SRodney W. Grimes 		ptr->valid = VALID;
3064b88c807SRodney W. Grimes 	}
3074b88c807SRodney W. Grimes 	return(ptr->name);
3084b88c807SRodney W. Grimes }
3094b88c807SRodney W. Grimes 
3104b88c807SRodney W. Grimes /*
3114b88c807SRodney W. Grimes  * uid_name()
3124b88c807SRodney W. Grimes  *	caches the uid for a given user name. We use a simple hash table.
3134b88c807SRodney W. Grimes  * Return
3144b88c807SRodney W. Grimes  *	the uid (if any) for a user name, or a -1 if no match can be found
3154b88c807SRodney W. Grimes  */
3164b88c807SRodney W. Grimes 
3174b88c807SRodney W. Grimes int
3184b88c807SRodney W. Grimes uid_name(char *name, uid_t *uid)
3194b88c807SRodney W. Grimes {
320f789b261SWarner Losh 	struct passwd *pw;
321f789b261SWarner Losh 	UIDC *ptr;
322f789b261SWarner Losh 	int namelen;
3234b88c807SRodney W. Grimes 
3244b88c807SRodney W. Grimes 	/*
3254b88c807SRodney W. Grimes 	 * return -1 for mangled names
3264b88c807SRodney W. Grimes 	 */
3274b88c807SRodney W. Grimes 	if (((namelen = strlen(name)) == 0) || (name[0] == '\0'))
3284b88c807SRodney W. Grimes 		return(-1);
3294b88c807SRodney W. Grimes 	if ((usrtb == NULL) && (usrtb_start() < 0))
3304b88c807SRodney W. Grimes 		return(-1);
3314b88c807SRodney W. Grimes 
3324b88c807SRodney W. Grimes 	/*
3334b88c807SRodney W. Grimes 	 * look up in hash table, if found and valid return the uid,
3344b88c807SRodney W. Grimes 	 * if found and invalid, return a -1
3354b88c807SRodney W. Grimes 	 */
3364b88c807SRodney W. Grimes 	ptr = usrtb[st_hash(name, namelen, UNM_SZ)];
3374b88c807SRodney W. Grimes 	if ((ptr != NULL) && (ptr->valid > 0) && !strcmp(name, ptr->name)) {
3384b88c807SRodney W. Grimes 		if (ptr->valid == INVALID)
3394b88c807SRodney W. Grimes 			return(-1);
3404b88c807SRodney W. Grimes 		*uid = ptr->uid;
3414b88c807SRodney W. Grimes 		return(0);
3424b88c807SRodney W. Grimes 	}
3434b88c807SRodney W. Grimes 
3444b88c807SRodney W. Grimes 	if (!pwopn) {
3454b88c807SRodney W. Grimes 		setpassent(1);
3464b88c807SRodney W. Grimes 		++pwopn;
3474b88c807SRodney W. Grimes 	}
3484b88c807SRodney W. Grimes 
3494b88c807SRodney W. Grimes 	if (ptr == NULL)
350b1787decSKris Kennaway 		ptr = usrtb[st_hash(name, namelen, UNM_SZ)] =
351b1787decSKris Kennaway 		  (UIDC *)malloc(sizeof(UIDC));
3524b88c807SRodney W. Grimes 
3534b88c807SRodney W. Grimes 	/*
3544b88c807SRodney W. Grimes 	 * no match, look it up, if no match store it as an invalid entry,
3554b88c807SRodney W. Grimes 	 * or store the matching uid
3564b88c807SRodney W. Grimes 	 */
3574b88c807SRodney W. Grimes 	if (ptr == NULL) {
3584b88c807SRodney W. Grimes 		if ((pw = getpwnam(name)) == NULL)
3594b88c807SRodney W. Grimes 			return(-1);
3604b88c807SRodney W. Grimes 		*uid = pw->pw_uid;
3614b88c807SRodney W. Grimes 		return(0);
3624b88c807SRodney W. Grimes 	}
363877155d0SPhilippe Charnier 	(void)strncpy(ptr->name, name, UNMLEN - 1);
3644b88c807SRodney W. Grimes 	ptr->name[UNMLEN-1] = '\0';
3654b88c807SRodney W. Grimes 	if ((pw = getpwnam(name)) == NULL) {
3664b88c807SRodney W. Grimes 		ptr->valid = INVALID;
3674b88c807SRodney W. Grimes 		return(-1);
3684b88c807SRodney W. Grimes 	}
3694b88c807SRodney W. Grimes 	ptr->valid = VALID;
3704b88c807SRodney W. Grimes 	*uid = ptr->uid = pw->pw_uid;
3714b88c807SRodney W. Grimes 	return(0);
3724b88c807SRodney W. Grimes }
3734b88c807SRodney W. Grimes 
3744b88c807SRodney W. Grimes /*
3754b88c807SRodney W. Grimes  * gid_name()
3764b88c807SRodney W. Grimes  *	caches the gid for a given group name. We use a simple hash table.
3774b88c807SRodney W. Grimes  * Return
3784b88c807SRodney W. Grimes  *	the gid (if any) for a group name, or a -1 if no match can be found
3794b88c807SRodney W. Grimes  */
3804b88c807SRodney W. Grimes 
3814b88c807SRodney W. Grimes int
3824b88c807SRodney W. Grimes gid_name(char *name, gid_t *gid)
3834b88c807SRodney W. Grimes {
384f789b261SWarner Losh 	struct group *gr;
385f789b261SWarner Losh 	GIDC *ptr;
386f789b261SWarner Losh 	int namelen;
3874b88c807SRodney W. Grimes 
3884b88c807SRodney W. Grimes 	/*
3894b88c807SRodney W. Grimes 	 * return -1 for mangled names
3904b88c807SRodney W. Grimes 	 */
3914b88c807SRodney W. Grimes 	if (((namelen = strlen(name)) == 0) || (name[0] == '\0'))
3924b88c807SRodney W. Grimes 		return(-1);
3934b88c807SRodney W. Grimes 	if ((grptb == NULL) && (grptb_start() < 0))
3944b88c807SRodney W. Grimes 		return(-1);
3954b88c807SRodney W. Grimes 
3964b88c807SRodney W. Grimes 	/*
3974b88c807SRodney W. Grimes 	 * look up in hash table, if found and valid return the uid,
3984b88c807SRodney W. Grimes 	 * if found and invalid, return a -1
3994b88c807SRodney W. Grimes 	 */
4004b88c807SRodney W. Grimes 	ptr = grptb[st_hash(name, namelen, GID_SZ)];
4014b88c807SRodney W. Grimes 	if ((ptr != NULL) && (ptr->valid > 0) && !strcmp(name, ptr->name)) {
4024b88c807SRodney W. Grimes 		if (ptr->valid == INVALID)
4034b88c807SRodney W. Grimes 			return(-1);
4044b88c807SRodney W. Grimes 		*gid = ptr->gid;
4054b88c807SRodney W. Grimes 		return(0);
4064b88c807SRodney W. Grimes 	}
4074b88c807SRodney W. Grimes 
4084b88c807SRodney W. Grimes 	if (!gropn) {
4094b88c807SRodney W. Grimes 		setgroupent(1);
4104b88c807SRodney W. Grimes 		++gropn;
4114b88c807SRodney W. Grimes 	}
4124b88c807SRodney W. Grimes 	if (ptr == NULL)
413b1787decSKris Kennaway 		ptr = grptb[st_hash(name, namelen, GID_SZ)] =
414b1787decSKris Kennaway 		  (GIDC *)malloc(sizeof(GIDC));
4154b88c807SRodney W. Grimes 
4164b88c807SRodney W. Grimes 	/*
4174b88c807SRodney W. Grimes 	 * no match, look it up, if no match store it as an invalid entry,
4184b88c807SRodney W. Grimes 	 * or store the matching gid
4194b88c807SRodney W. Grimes 	 */
4204b88c807SRodney W. Grimes 	if (ptr == NULL) {
4214b88c807SRodney W. Grimes 		if ((gr = getgrnam(name)) == NULL)
4224b88c807SRodney W. Grimes 			return(-1);
4234b88c807SRodney W. Grimes 		*gid = gr->gr_gid;
4244b88c807SRodney W. Grimes 		return(0);
4254b88c807SRodney W. Grimes 	}
4264b88c807SRodney W. Grimes 
427877155d0SPhilippe Charnier 	(void)strncpy(ptr->name, name, GNMLEN - 1);
4284b88c807SRodney W. Grimes 	ptr->name[GNMLEN-1] = '\0';
4294b88c807SRodney W. Grimes 	if ((gr = getgrnam(name)) == NULL) {
4304b88c807SRodney W. Grimes 		ptr->valid = INVALID;
4314b88c807SRodney W. Grimes 		return(-1);
4324b88c807SRodney W. Grimes 	}
4334b88c807SRodney W. Grimes 	ptr->valid = VALID;
4344b88c807SRodney W. Grimes 	*gid = ptr->gid = gr->gr_gid;
4354b88c807SRodney W. Grimes 	return(0);
4364b88c807SRodney W. Grimes }
437