2 * Copyright (c) 2003 Networks Associates Technology, Inc.
5 * This software was developed for the FreeBSD Project by
6 * Jacques A. Vidrine, Safeport Network Services, and Network
7 * Associates Laboratories, the Security Research Division of Network
8 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $FreeBSD: src/lib/libc/gen/getgrent.c,v 1.37 2007/12/12 10:08:02 bushman Exp $
35 #include "namespace.h"
36 #include <sys/param.h>
39 #include <rpcsvc/yp_prot.h>
40 #include <rpcsvc/ypclnt.h>
51 #include <pthread_np.h>
57 #include "un-namespace.h"
58 #include "libc_private.h"
65 GRP_STORAGE_INITIAL = 1 << 10, /* 1 KByte */
66 GRP_STORAGE_MAX = 1 << 20, /* 1 MByte */
69 HESIOD_NAME_MAX = 256,
72 static const ns_src defaultsrc[] = {
73 { NSSRC_COMPAT, NS_SUCCESS },
77 int __gr_match_entry(const char *, size_t, enum nss_lookup_type,
79 int __gr_parse_entry(char *, size_t, struct group *, char *, size_t,
82 static int is_comment_line(const char *, size_t);
88 static struct group *getgr(int (*)(union key, struct group *, char *, size_t,
89 struct group **), union key);
90 static int wrap_getgrnam_r(union key, struct group *, char *, size_t,
92 static int wrap_getgrgid_r(union key, struct group *, char *, size_t,
94 static int wrap_getgrent_r(union key, struct group *, char *, size_t,
101 static void files_endstate(void *);
102 NSS_TLS_HANDLING(files);
103 static int files_setgrent(void *, void *, va_list);
104 static int files_group(void *, void *, va_list);
111 static void dns_endstate(void *);
112 NSS_TLS_HANDLING(dns);
113 static int dns_setgrent(void *, void *, va_list);
114 static int dns_group(void *, void *, va_list);
120 char domain[MAXHOSTNAMELEN];
125 static void nis_endstate(void *);
126 NSS_TLS_HANDLING(nis);
127 static int nis_setgrent(void *, void *, va_list);
128 static int nis_group(void *, void *, va_list);
131 struct compat_state {
141 static void compat_endstate(void *);
142 NSS_TLS_HANDLING(compat);
143 static int compat_setgrent(void *, void *, va_list);
144 static int compat_group(void *, void *, va_list);
146 static int gr_addgid(gid_t, gid_t *, int, int *);
147 static int getgroupmembership_fallback(void *, void *, va_list);
150 static int grp_id_func(char *, size_t *, va_list, void *);
151 static int grp_marshal_func(char *, size_t *, void *, va_list, void *);
152 static int grp_unmarshal_func(char *, size_t, void *, va_list, void *);
155 grp_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata)
160 size_t desired_size, size;
161 int res = NS_UNAVAIL;
162 enum nss_lookup_type lookup_type;
165 lookup_type = (enum nss_lookup_type)cache_mdata;
166 switch (lookup_type) {
168 name = va_arg(ap, char *);
170 desired_size = sizeof(enum nss_lookup_type) + size + 1;
171 if (desired_size > *buffer_size) {
176 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
177 memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1);
182 gid = va_arg(ap, gid_t);
183 desired_size = sizeof(enum nss_lookup_type) + sizeof(gid_t);
184 if (desired_size > *buffer_size) {
189 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
190 memcpy(buffer + sizeof(enum nss_lookup_type), &gid,
196 /* should be unreachable */
201 *buffer_size = desired_size;
206 grp_marshal_func(char *buffer, size_t *buffer_size, void *retval __unused,
207 va_list ap, void *cache_mdata)
212 char *orig_buf __unused;
213 size_t orig_buf_size __unused;
215 struct group new_grp;
216 size_t desired_size, size, mem_size;
219 switch ((enum nss_lookup_type)cache_mdata) {
221 name = va_arg(ap, char *);
224 gid = va_arg(ap, gid_t);
229 /* should be unreachable */
233 grp = va_arg(ap, struct group *);
234 orig_buf = va_arg(ap, char *);
235 orig_buf_size = va_arg(ap, size_t);
237 desired_size = _ALIGNBYTES + sizeof(struct group) + sizeof(char *);
239 if (grp->gr_name != NULL)
240 desired_size += strlen(grp->gr_name) + 1;
241 if (grp->gr_passwd != NULL)
242 desired_size += strlen(grp->gr_passwd) + 1;
244 if (grp->gr_mem != NULL) {
246 for (mem = grp->gr_mem; *mem; ++mem) {
247 desired_size += strlen(*mem) + 1;
251 desired_size += _ALIGNBYTES + (mem_size + 1) * sizeof(char *);
254 if (desired_size > *buffer_size) {
255 /* this assignment is here for future use */
256 *buffer_size = desired_size;
260 memcpy(&new_grp, grp, sizeof(struct group));
261 memset(buffer, 0, desired_size);
263 *buffer_size = desired_size;
264 p = buffer + sizeof(struct group) + sizeof(char *);
265 memcpy(buffer + sizeof(struct group), &p, sizeof(char *));
266 p = (char *)_ALIGN(p);
268 if (new_grp.gr_name != NULL) {
269 size = strlen(new_grp.gr_name);
270 memcpy(p, new_grp.gr_name, size);
275 if (new_grp.gr_passwd != NULL) {
276 size = strlen(new_grp.gr_passwd);
277 memcpy(p, new_grp.gr_passwd, size);
278 new_grp.gr_passwd = p;
282 if (new_grp.gr_mem != NULL) {
283 p = (char *)_ALIGN(p);
284 memcpy(p, new_grp.gr_mem, sizeof(char *) * mem_size);
285 new_grp.gr_mem = (char **)p;
286 p += sizeof(char *) * (mem_size + 1);
288 for (mem = new_grp.gr_mem; *mem; ++mem) {
290 memcpy(p, *mem, size);
296 memcpy(buffer, &new_grp, sizeof(struct group));
301 grp_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap,
308 size_t orig_buf_size;
314 switch ((enum nss_lookup_type)cache_mdata) {
316 name = va_arg(ap, char *);
319 gid = va_arg(ap, gid_t);
324 /* should be unreachable */
328 grp = va_arg(ap, struct group *);
329 orig_buf = va_arg(ap, char *);
330 orig_buf_size = va_arg(ap, size_t);
331 ret_errno = va_arg(ap, int *);
334 buffer_size - sizeof(struct group) - sizeof(char *)) {
339 memcpy(grp, buffer, sizeof(struct group));
340 memcpy(&p, buffer + sizeof(struct group), sizeof(char *));
342 orig_buf = (char *)_ALIGN(orig_buf);
343 memcpy(orig_buf, buffer + sizeof(struct group) + sizeof(char *) +
344 _ALIGN(p) - (size_t)p,
345 buffer_size - sizeof(struct group) - sizeof(char *) -
346 _ALIGN(p) + (size_t)p);
347 p = (char *)_ALIGN(p);
349 NS_APPLY_OFFSET(grp->gr_name, orig_buf, p, char *);
350 NS_APPLY_OFFSET(grp->gr_passwd, orig_buf, p, char *);
351 if (grp->gr_mem != NULL) {
352 NS_APPLY_OFFSET(grp->gr_mem, orig_buf, p, char **);
354 for (mem = grp->gr_mem; *mem; ++mem)
355 NS_APPLY_OFFSET(*mem, orig_buf, p, char *);
359 *((struct group **)retval) = grp;
364 NSS_MP_CACHE_HANDLING(group);
365 #endif /* NS_CACHING */
368 static const nss_cache_info setgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
369 group, (void *)nss_lt_all,
373 static const ns_dtab setgrent_dtab[] = {
374 { NSSRC_FILES, files_setgrent, (void *)SETGRENT },
376 { NSSRC_DNS, dns_setgrent, (void *)SETGRENT },
379 { NSSRC_NIS, nis_setgrent, (void *)SETGRENT },
381 { NSSRC_COMPAT, compat_setgrent, (void *)SETGRENT },
383 NS_CACHE_CB(&setgrent_cache_info)
389 static const nss_cache_info endgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
390 group, (void *)nss_lt_all,
394 static const ns_dtab endgrent_dtab[] = {
395 { NSSRC_FILES, files_setgrent, (void *)ENDGRENT },
397 { NSSRC_DNS, dns_setgrent, (void *)ENDGRENT },
400 { NSSRC_NIS, nis_setgrent, (void *)ENDGRENT },
402 { NSSRC_COMPAT, compat_setgrent, (void *)ENDGRENT },
404 NS_CACHE_CB(&endgrent_cache_info)
410 static const nss_cache_info getgrent_r_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
411 group, (void *)nss_lt_all,
412 grp_marshal_func, grp_unmarshal_func);
415 static const ns_dtab getgrent_r_dtab[] = {
416 { NSSRC_FILES, files_group, (void *)nss_lt_all },
418 { NSSRC_DNS, dns_group, (void *)nss_lt_all },
421 { NSSRC_NIS, nis_group, (void *)nss_lt_all },
423 { NSSRC_COMPAT, compat_group, (void *)nss_lt_all },
425 NS_CACHE_CB(&getgrent_r_cache_info)
431 gr_addgid(gid_t gid, gid_t *groups, int maxgrp, int *grpcnt)
435 for (dupc = 0; dupc < MIN(maxgrp, *grpcnt); dupc++) {
436 if (groups[dupc] == gid)
441 if (*grpcnt < maxgrp)
442 groups[*grpcnt] = gid;
452 getgroupmembership_fallback(void *retval __unused, void *mdata, va_list ap)
454 const ns_src src[] = {
455 { mdata, NS_SUCCESS },
466 int i, rv, ret_errno;
469 * As this is a fallback method, only provided src
470 * list will be respected during methods search.
472 assert(src[0].name != NULL);
474 uname = va_arg(ap, const char *);
475 agroup = va_arg(ap, gid_t);
476 groups = va_arg(ap, gid_t *);
477 maxgrp = va_arg(ap, int);
478 grpcnt = va_arg(ap, int *);
482 buf = malloc(GRP_STORAGE_INITIAL);
486 bufsize = GRP_STORAGE_INITIAL;
488 gr_addgid(agroup, groups, maxgrp, grpcnt);
490 _nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", src, 0);
495 rv = _nsdispatch(&grp_p, getgrent_r_dtab, NSDB_GROUP,
496 "getgrent_r", src, &grp, buf, bufsize, &ret_errno);
498 if (grp_p == NULL && ret_errno == ERANGE) {
500 if ((bufsize << 1) > GRP_STORAGE_MAX) {
507 buf = malloc(bufsize);
512 } while (grp_p == NULL && ret_errno == ERANGE);
514 if (ret_errno != 0) {
522 for (i = 0; grp.gr_mem[i]; i++) {
523 if (strcmp(grp.gr_mem[i], uname) == 0)
524 gr_addgid(grp.gr_gid, groups, maxgrp, grpcnt);
528 _nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", src);
537 _nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc, 0);
542 setgroupent(int stayopen)
544 _nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc,
553 _nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", defaultsrc);
558 getgrent_r(struct group *grp, char *buffer, size_t bufsize,
559 struct group **result)
565 rv = _nsdispatch(result, getgrent_r_dtab, NSDB_GROUP, "getgrent_r", defaultsrc,
566 grp, buffer, bufsize, &ret_errno);
567 if (rv == NS_SUCCESS)
575 getgrnam_r(const char *name, struct group *grp, char *buffer, size_t bufsize,
576 struct group **result)
579 static const nss_cache_info cache_info =
580 NS_COMMON_CACHE_INFO_INITIALIZER(
581 group, (void *)nss_lt_name,
582 grp_id_func, grp_marshal_func, grp_unmarshal_func);
585 static const ns_dtab dtab[] = {
586 { NSSRC_FILES, files_group, (void *)nss_lt_name },
588 { NSSRC_DNS, dns_group, (void *)nss_lt_name },
591 { NSSRC_NIS, nis_group, (void *)nss_lt_name },
593 { NSSRC_COMPAT, compat_group, (void *)nss_lt_name },
595 NS_CACHE_CB(&cache_info)
603 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrnam_r", defaultsrc,
604 name, grp, buffer, bufsize, &ret_errno);
605 if (rv == NS_SUCCESS)
613 getgrgid_r(gid_t gid, struct group *grp, char *buffer, size_t bufsize,
614 struct group **result)
617 static const nss_cache_info cache_info =
618 NS_COMMON_CACHE_INFO_INITIALIZER(
619 group, (void *)nss_lt_id,
620 grp_id_func, grp_marshal_func, grp_unmarshal_func);
623 static const ns_dtab dtab[] = {
624 { NSSRC_FILES, files_group, (void *)nss_lt_id },
626 { NSSRC_DNS, dns_group, (void *)nss_lt_id },
629 { NSSRC_NIS, nis_group, (void *)nss_lt_id },
631 { NSSRC_COMPAT, compat_group, (void *)nss_lt_id },
633 NS_CACHE_CB(&cache_info)
641 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrgid_r", defaultsrc,
642 gid, grp, buffer, bufsize, &ret_errno);
643 if (rv == NS_SUCCESS)
652 __getgroupmembership(const char *uname, gid_t agroup, gid_t *groups,
653 int maxgrp, int *grpcnt)
655 static const ns_dtab dtab[] = {
656 NS_FALLBACK_CB(getgroupmembership_fallback)
661 assert(uname != NULL);
662 /* groups may be NULL if just sizing when invoked with maxgrp = 0 */
663 assert(grpcnt != NULL);
666 rv = _nsdispatch(NULL, dtab, NSDB_GROUP, "getgroupmembership",
667 defaultsrc, uname, agroup, groups, maxgrp, grpcnt);
669 /* too many groups found? */
670 return (*grpcnt > maxgrp ? -1 : 0);
674 static struct group grp;
675 static char *grp_storage;
676 static size_t grp_storage_size;
678 static struct group *
679 getgr(int (*fn)(union key, struct group *, char *, size_t, struct group **),
685 if (grp_storage == NULL) {
686 grp_storage = malloc(GRP_STORAGE_INITIAL);
687 if (grp_storage == NULL)
689 grp_storage_size = GRP_STORAGE_INITIAL;
692 rv = fn(key, &grp, grp_storage, grp_storage_size, &res);
693 if (res == NULL && rv == ERANGE) {
695 if ((grp_storage_size << 1) > GRP_STORAGE_MAX) {
700 grp_storage_size <<= 1;
701 grp_storage = malloc(grp_storage_size);
702 if (grp_storage == NULL)
705 } while (res == NULL && rv == ERANGE);
713 wrap_getgrnam_r(union key key, struct group *grp, char *buffer, size_t bufsize,
716 return (getgrnam_r(key.name, grp, buffer, bufsize, res));
721 wrap_getgrgid_r(union key key, struct group *grp, char *buffer, size_t bufsize,
724 return (getgrgid_r(key.gid, grp, buffer, bufsize, res));
729 wrap_getgrent_r(union key key __unused, struct group *grp, char *buffer,
730 size_t bufsize, struct group **res)
732 return (getgrent_r(grp, buffer, bufsize, res));
737 getgrnam(const char *name)
742 return (getgr(wrap_getgrnam_r, key));
752 return (getgr(wrap_getgrgid_r, key));
761 key.gid = 0; /* not used */
762 return (getgr(wrap_getgrent_r, key));
767 is_comment_line(const char *s, size_t n)
774 if (*s == '#' || !isspace((unsigned char)*s))
776 return (*s == '#' || s == eom);
784 files_endstate(void *p)
789 if (((struct files_state *)p)->fp != NULL)
790 fclose(((struct files_state *)p)->fp);
796 files_setgrent(void *retval __unused, void *mdata, va_list ap)
798 struct files_state *st;
801 rv = files_getstate(&st);
804 switch ((enum constants)mdata) {
806 stayopen = va_arg(ap, int);
810 st->fp = fopen(_PATH_GROUP, "r");
813 if (st->fp != NULL) {
826 files_group(void *retval, void *mdata, va_list ap)
828 struct files_state *st;
829 enum nss_lookup_type how;
830 const char *name, *line;
834 size_t bufsize, linesize;
836 int rv, stayopen, *errnop;
840 how = (enum nss_lookup_type)mdata;
843 name = va_arg(ap, const char *);
846 gid = va_arg(ap, gid_t);
851 return (NS_NOTFOUND);
853 grp = va_arg(ap, struct group *);
854 buffer = va_arg(ap, char *);
855 bufsize = va_arg(ap, size_t);
856 errnop = va_arg(ap, int *);
857 *errnop = files_getstate(&st);
860 if (st->fp == NULL &&
861 ((st->fp = fopen(_PATH_GROUP, "r")) == NULL)) {
865 if (how == nss_lt_all)
869 stayopen = st->stayopen;
872 pos = ftello(st->fp);
873 while ((line = fgetln(st->fp, &linesize)) != NULL) {
874 if (line[linesize-1] == '\n')
876 rv = __gr_match_entry(line, linesize, how, name, gid);
877 if (rv != NS_SUCCESS)
879 /* We need room at least for the line, a string NUL
880 * terminator, alignment padding, and one (char *)
881 * pointer for the member list terminator.
883 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) {
888 memcpy(buffer, line, linesize);
889 buffer[linesize] = '\0';
890 rv = __gr_parse_entry(buffer, linesize, grp,
891 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
892 if (rv & NS_TERMINATE)
894 pos = ftello(st->fp);
896 if (!stayopen && st->fp != NULL) {
900 if (rv == NS_SUCCESS && retval != NULL)
901 *(struct group **)retval = grp;
902 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL)
903 fseeko(st->fp, pos, SEEK_SET);
913 dns_endstate(void *p)
921 dns_setgrent(void *retval, void *cb_data, va_list ap)
923 struct dns_state *st;
926 rv = dns_getstate(&st);
935 dns_group(void *retval, void *mdata, va_list ap)
937 char buf[HESIOD_NAME_MAX];
938 struct dns_state *st;
940 const char *name, *label;
943 size_t bufsize, adjsize, linesize;
945 enum nss_lookup_type how;
952 how = (enum nss_lookup_type)mdata;
955 name = va_arg(ap, const char *);
958 gid = va_arg(ap, gid_t);
963 grp = va_arg(ap, struct group *);
964 buffer = va_arg(ap, char *);
965 bufsize = va_arg(ap, size_t);
966 errnop = va_arg(ap, int *);
967 *errnop = dns_getstate(&st);
970 if (hesiod_init(&ctx) != 0) {
982 if (snprintf(buf, sizeof(buf), "%lu",
983 (unsigned long)gid) >= sizeof(buf))
990 if (snprintf(buf, sizeof(buf), "group-%ld",
991 st->counter++) >= sizeof(buf))
996 hes = hesiod_resolve(ctx, label,
997 how == nss_lt_id ? "gid" : "group");
998 if ((how == nss_lt_id && hes == NULL &&
999 (hes = hesiod_resolve(ctx, buf, "group")) == NULL) ||
1001 if (how == nss_lt_all)
1003 if (errno != ENOENT)
1007 rv = __gr_match_entry(hes[0], strlen(hes[0]), how, name, gid);
1008 if (rv != NS_SUCCESS) {
1009 hesiod_free_list(ctx, hes);
1013 /* We need room at least for the line, a string NUL
1014 * terminator, alignment padding, and one (char *)
1015 * pointer for the member list terminator.
1017 adjsize = bufsize - _ALIGNBYTES - sizeof(char *);
1018 linesize = strlcpy(buffer, hes[0], adjsize);
1019 if (linesize >= adjsize) {
1024 hesiod_free_list(ctx, hes);
1026 rv = __gr_parse_entry(buffer, linesize, grp,
1027 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
1028 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1031 hesiod_free_list(ctx, hes);
1034 if (rv == NS_SUCCESS && retval != NULL)
1035 *(struct group **)retval = grp;
1046 nis_endstate(void *p)
1051 free(((struct nis_state *)p)->key);
1057 nis_setgrent(void *retval __unused, void *cb_data __unused, va_list ap __unused)
1059 struct nis_state *st;
1062 rv = nis_getstate(&st);
1064 return (NS_UNAVAIL);
1068 return (NS_UNAVAIL);
1073 nis_group(void *retval, void *mdata, va_list ap)
1076 struct nis_state *st;
1079 char *buffer, *key, *result;
1082 enum nss_lookup_type how;
1083 int *errnop, keylen, resultlen, rv;
1087 how = (enum nss_lookup_type)mdata;
1090 name = va_arg(ap, const char *);
1091 map = "group.byname";
1094 gid = va_arg(ap, gid_t);
1095 map = "group.bygid";
1098 map = "group.byname";
1101 grp = va_arg(ap, struct group *);
1102 buffer = va_arg(ap, char *);
1103 bufsize = va_arg(ap, size_t);
1104 errnop = va_arg(ap, int *);
1105 *errnop = nis_getstate(&st);
1107 return (NS_UNAVAIL);
1108 if (st->domain[0] == '\0') {
1109 if (getdomainname(st->domain, sizeof(st->domain)) != 0) {
1111 return (NS_UNAVAIL);
1119 if (strlcpy(buffer, name, bufsize) >= bufsize)
1123 if (snprintf(buffer, bufsize, "%lu",
1124 (unsigned long)gid) >= bufsize)
1133 if (how == nss_lt_all) {
1134 if (st->key == NULL)
1135 rv = yp_first(st->domain, map, &st->key,
1136 &st->keylen, &result, &resultlen);
1139 keylen = st->keylen;
1141 rv = yp_next(st->domain, map, key, keylen,
1142 &st->key, &st->keylen, &result,
1150 if (rv == YPERR_NOMORE) {
1158 rv = yp_match(st->domain, map, buffer, strlen(buffer),
1159 &result, &resultlen);
1160 if (rv == YPERR_KEY) {
1163 } else if (rv != 0) {
1169 /* We need room at least for the line, a string NUL
1170 * terminator, alignment padding, and one (char *)
1171 * pointer for the member list terminator.
1173 if (resultlen >= bufsize - _ALIGNBYTES - sizeof(char *))
1175 memcpy(buffer, result, resultlen);
1176 buffer[resultlen] = '\0';
1178 rv = __gr_match_entry(buffer, resultlen, how, name, gid);
1179 if (rv == NS_SUCCESS)
1180 rv = __gr_parse_entry(buffer, resultlen, grp,
1181 &buffer[resultlen+1], bufsize - resultlen - 1,
1183 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1185 if (rv == NS_SUCCESS && retval != NULL)
1186 *(struct group **)retval = grp;
1200 compat_endstate(void *p)
1202 struct compat_state *st;
1206 st = (struct compat_state *)p;
1215 compat_setgrent(void *retval __unused, void *mdata, va_list ap)
1217 static const ns_src compatsrc[] = {
1219 { NSSRC_NIS, NS_SUCCESS },
1225 { NSSRC_DNS, dns_setgrent, NULL },
1228 { NSSRC_NIS, nis_setgrent, NULL },
1230 { NULL, NULL, NULL }
1232 struct compat_state *st;
1235 #define set_setent(x, y) do { \
1238 for (i = 0; i < (sizeof(x)/sizeof(x[0])) - 1; i++) \
1239 x[i].mdata = (void *)y; \
1242 rv = compat_getstate(&st);
1244 return (NS_UNAVAIL);
1245 switch ((enum constants)mdata) {
1247 stayopen = va_arg(ap, int);
1251 st->fp = fopen(_PATH_GROUP, "r");
1252 set_setent(dtab, mdata);
1253 _nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "setgrent",
1257 if (st->fp != NULL) {
1261 set_setent(dtab, mdata);
1262 _nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "endgrent",
1268 st->compat = COMPAT_MODE_OFF;
1271 return (NS_UNAVAIL);
1277 compat_group(void *retval, void *mdata, va_list ap)
1279 static const ns_src compatsrc[] = {
1281 { NSSRC_NIS, NS_SUCCESS },
1287 { NSSRC_NIS, nis_group, NULL },
1290 { NSSRC_DNS, dns_group, NULL },
1292 { NULL, NULL, NULL }
1294 struct compat_state *st;
1295 enum nss_lookup_type how;
1296 const char *name, *line;
1301 size_t bufsize, linesize;
1303 int rv, stayopen, *errnop;
1305 #define set_lookup_type(x, y) do { \
1308 for (i = 0; i < (sizeof(x)/sizeof(x[0])) - 1; i++) \
1309 x[i].mdata = (void *)y; \
1314 how = (enum nss_lookup_type)mdata;
1317 name = va_arg(ap, const char *);
1320 gid = va_arg(ap, gid_t);
1325 return (NS_NOTFOUND);
1327 grp = va_arg(ap, struct group *);
1328 buffer = va_arg(ap, char *);
1329 bufsize = va_arg(ap, size_t);
1330 errnop = va_arg(ap, int *);
1331 *errnop = compat_getstate(&st);
1333 return (NS_UNAVAIL);
1334 if (st->fp == NULL &&
1335 ((st->fp = fopen(_PATH_GROUP, "r")) == NULL)) {
1340 if (how == nss_lt_all)
1344 stayopen = st->stayopen;
1347 switch (st->compat) {
1348 case COMPAT_MODE_ALL:
1349 set_lookup_type(dtab, how);
1352 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1353 "getgrent_r", compatsrc, grp, buffer, bufsize,
1357 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1358 "getgrgid_r", compatsrc, gid, grp, buffer, bufsize,
1362 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1363 "getgrnam_r", compatsrc, name, grp, buffer,
1367 if (rv & NS_TERMINATE)
1369 st->compat = COMPAT_MODE_OFF;
1371 case COMPAT_MODE_NAME:
1372 set_lookup_type(dtab, nss_lt_name);
1373 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1374 "getgrnam_r", compatsrc, st->name, grp, buffer, bufsize,
1380 if (strcmp(name, grp->gr_name) != 0)
1384 if (gid != grp->gr_gid)
1398 st->compat = COMPAT_MODE_OFF;
1399 if (rv == NS_SUCCESS)
1406 pos = ftello(st->fp);
1407 while ((line = fgetln(st->fp, &linesize)) != NULL) {
1408 if (line[linesize-1] == '\n')
1410 if (linesize > 2 && line[0] == '+') {
1411 p = memchr(&line[1], ':', linesize);
1412 if (p == NULL || p == &line[1])
1413 st->compat = COMPAT_MODE_ALL;
1415 st->name = malloc(p - line);
1416 if (st->name == NULL) {
1418 "getgrent memory allocation failure");
1423 memcpy(st->name, &line[1], p - line - 1);
1424 st->name[p - line - 1] = '\0';
1425 st->compat = COMPAT_MODE_NAME;
1429 rv = __gr_match_entry(line, linesize, how, name, gid);
1430 if (rv != NS_SUCCESS)
1432 /* We need room at least for the line, a string NUL
1433 * terminator, alignment padding, and one (char *)
1434 * pointer for the member list terminator.
1436 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) {
1441 memcpy(buffer, line, linesize);
1442 buffer[linesize] = '\0';
1443 rv = __gr_parse_entry(buffer, linesize, grp,
1444 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
1445 if (rv & NS_TERMINATE)
1447 pos = ftello(st->fp);
1450 if (!stayopen && st->fp != NULL) {
1454 if (rv == NS_SUCCESS && retval != NULL)
1455 *(struct group **)retval = grp;
1456 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL)
1457 fseeko(st->fp, pos, SEEK_SET);
1459 #undef set_lookup_type
1464 * common group line matching and parsing
1467 __gr_match_entry(const char *line, size_t linesize, enum nss_lookup_type how,
1468 const char *name, gid_t gid)
1471 const char *p, *eol;
1476 if (linesize == 0 || is_comment_line(line, linesize))
1477 return (NS_NOTFOUND);
1479 case nss_lt_name: needed = 1; break;
1480 case nss_lt_id: needed = 2; break;
1481 default: needed = 2; break;
1483 eol = &line[linesize];
1484 for (p = line, i = 0; i < needed && p < eol; p++)
1488 return (NS_NOTFOUND);
1491 namesize = strlen(name);
1492 if (namesize + 1 == (size_t)(p - line) &&
1493 memcmp(line, name, namesize) == 0)
1494 return (NS_SUCCESS);
1497 n = strtoul(p, &q, 10);
1498 if (q < eol && *q == ':' && gid == (gid_t)n)
1499 return (NS_SUCCESS);
1502 return (NS_SUCCESS);
1506 return (NS_NOTFOUND);
1511 __gr_parse_entry(char *line, size_t linesize __unused, struct group *grp,
1512 char *membuf, size_t membufsize, int *errnop)
1514 char *s_gid, *s_mem, *p, **members;
1518 memset(grp, 0, sizeof(*grp));
1519 members = (char **)_ALIGN(membuf);
1520 membufsize -= (char *)members - membuf;
1521 maxmembers = membufsize / sizeof(*members);
1522 if (maxmembers <= 0 ||
1523 (grp->gr_name = strsep(&line, ":")) == NULL ||
1524 grp->gr_name[0] == '\0' ||
1525 (grp->gr_passwd = strsep(&line, ":")) == NULL ||
1526 (s_gid = strsep(&line, ":")) == NULL ||
1528 return (NS_NOTFOUND);
1530 n = strtoul(s_gid, &s_gid, 10);
1531 if (s_gid[0] != '\0')
1532 return (NS_NOTFOUND);
1533 grp->gr_gid = (gid_t)n;
1534 grp->gr_mem = members;
1535 while (maxmembers > 1 && s_mem != NULL) {
1536 p = strsep(&s_mem, ",");
1537 if (p != NULL && *p != '\0') {
1544 return (NS_SUCCESS);