2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2003 Networks Associates Technology, Inc.
7 * This software was developed for the FreeBSD Project by
8 * Jacques A. Vidrine, Safeport Network Services, and Network
9 * Associates Laboratories, the Security Research Division of Network
10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
11 * ("CBOSS"), as part of the DARPA CHATS research program.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include "namespace.h"
39 #include <sys/param.h>
42 #include <rpcsvc/yp_prot.h>
43 #include <rpcsvc/ypclnt.h>
54 #include <pthread_np.h>
60 #include "un-namespace.h"
61 #include "libc_private.h"
68 GRP_STORAGE_INITIAL = 1 << 10, /* 1 KByte */
69 GRP_STORAGE_MAX = 1 << 20, /* 1 MByte */
72 HESIOD_NAME_MAX = 256,
75 static const ns_src defaultsrc[] = {
76 { NSSRC_COMPAT, NS_SUCCESS },
80 int __getgroupmembership(const char *, gid_t, gid_t *, int, int *);
81 int __gr_match_entry(const char *, size_t, enum nss_lookup_type,
83 int __gr_parse_entry(char *, size_t, struct group *, char *, size_t,
86 static int is_comment_line(const char *, size_t);
92 static struct group *getgr(int (*)(union key, struct group *, char *, size_t,
93 struct group **), union key);
94 static int wrap_getgrnam_r(union key, struct group *, char *, size_t,
96 static int wrap_getgrgid_r(union key, struct group *, char *, size_t,
98 static int wrap_getgrent_r(union key, struct group *, char *, size_t,
105 static void files_endstate(void *);
106 NSS_TLS_HANDLING(files);
107 static int files_setgrent(void *, void *, va_list);
108 static int files_group(void *, void *, va_list);
115 static void dns_endstate(void *);
116 NSS_TLS_HANDLING(dns);
117 static int dns_setgrent(void *, void *, va_list);
118 static int dns_group(void *, void *, va_list);
124 char domain[MAXHOSTNAMELEN];
129 static void nis_endstate(void *);
130 NSS_TLS_HANDLING(nis);
131 static int nis_setgrent(void *, void *, va_list);
132 static int nis_group(void *, void *, va_list);
135 struct compat_state {
145 static void compat_endstate(void *);
146 NSS_TLS_HANDLING(compat);
147 static int compat_setgrent(void *, void *, va_list);
148 static int compat_group(void *, void *, va_list);
150 static int gr_addgid(gid_t, gid_t *, int, int *);
151 static int getgroupmembership_fallback(void *, void *, va_list);
154 static int grp_id_func(char *, size_t *, va_list, void *);
155 static int grp_marshal_func(char *, size_t *, void *, va_list, void *);
156 static int grp_unmarshal_func(char *, size_t, void *, va_list, void *);
159 grp_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata)
164 size_t desired_size, size;
165 int res = NS_UNAVAIL;
166 enum nss_lookup_type lookup_type;
169 lookup_type = (enum nss_lookup_type)(uintptr_t)cache_mdata;
170 switch (lookup_type) {
172 name = va_arg(ap, char *);
174 desired_size = sizeof(enum nss_lookup_type) + size + 1;
175 if (desired_size > *buffer_size) {
180 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
181 memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1);
186 gid = va_arg(ap, gid_t);
187 desired_size = sizeof(enum nss_lookup_type) + sizeof(gid_t);
188 if (desired_size > *buffer_size) {
193 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
194 memcpy(buffer + sizeof(enum nss_lookup_type), &gid,
200 /* should be unreachable */
205 *buffer_size = desired_size;
210 grp_marshal_func(char *buffer, size_t *buffer_size, void *retval, va_list ap,
216 char *orig_buf __unused;
217 size_t orig_buf_size __unused;
218 struct group new_grp;
219 size_t desired_size, size, mem_size;
222 switch ((enum nss_lookup_type)(uintptr_t)cache_mdata) {
224 name = va_arg(ap, char *);
227 gid = va_arg(ap, gid_t);
232 /* should be unreachable */
236 grp = va_arg(ap, struct group *);
237 orig_buf = va_arg(ap, char *);
238 orig_buf_size = va_arg(ap, size_t);
240 desired_size = _ALIGNBYTES + sizeof(struct group) + sizeof(char *);
242 if (grp->gr_name != NULL)
243 desired_size += strlen(grp->gr_name) + 1;
244 if (grp->gr_passwd != NULL)
245 desired_size += strlen(grp->gr_passwd) + 1;
247 if (grp->gr_mem != NULL) {
249 for (mem = grp->gr_mem; *mem; ++mem) {
250 desired_size += strlen(*mem) + 1;
254 desired_size += _ALIGNBYTES + (mem_size + 1) * sizeof(char *);
257 if (desired_size > *buffer_size) {
258 /* this assignment is here for future use */
259 *buffer_size = desired_size;
263 memcpy(&new_grp, grp, sizeof(struct group));
264 memset(buffer, 0, desired_size);
266 *buffer_size = desired_size;
267 p = buffer + sizeof(struct group) + sizeof(char *);
268 memcpy(buffer + sizeof(struct group), &p, sizeof(char *));
269 p = (char *)_ALIGN(p);
271 if (new_grp.gr_name != NULL) {
272 size = strlen(new_grp.gr_name);
273 memcpy(p, new_grp.gr_name, size);
278 if (new_grp.gr_passwd != NULL) {
279 size = strlen(new_grp.gr_passwd);
280 memcpy(p, new_grp.gr_passwd, size);
281 new_grp.gr_passwd = p;
285 if (new_grp.gr_mem != NULL) {
286 p = (char *)_ALIGN(p);
287 memcpy(p, new_grp.gr_mem, sizeof(char *) * mem_size);
288 new_grp.gr_mem = (char **)p;
289 p += sizeof(char *) * (mem_size + 1);
291 for (mem = new_grp.gr_mem; *mem; ++mem) {
293 memcpy(p, *mem, size);
299 memcpy(buffer, &new_grp, sizeof(struct group));
304 grp_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap,
311 size_t orig_buf_size;
317 switch ((enum nss_lookup_type)(uintptr_t)cache_mdata) {
319 name = va_arg(ap, char *);
322 gid = va_arg(ap, gid_t);
327 /* should be unreachable */
331 grp = va_arg(ap, struct group *);
332 orig_buf = va_arg(ap, char *);
333 orig_buf_size = va_arg(ap, size_t);
334 ret_errno = va_arg(ap, int *);
336 if (orig_buf_size + sizeof(struct group) + sizeof(char *) < buffer_size)
340 } else if (buffer_size < sizeof(struct group) + sizeof(char *)) {
342 * nscd(8) sometimes returns buffer_size=1 for nonexistent
346 return (NS_NOTFOUND);
349 memcpy(grp, buffer, sizeof(struct group));
350 memcpy(&p, buffer + sizeof(struct group), sizeof(char *));
352 if (orig_buf_size + sizeof(struct group) + sizeof(char *) +
353 _ALIGN(p) - (size_t)p < buffer_size) {
358 orig_buf = (char *)_ALIGN(orig_buf);
359 memcpy(orig_buf, buffer + sizeof(struct group) + sizeof(char *) +
360 _ALIGN(p) - (size_t)p,
361 buffer_size - sizeof(struct group) - sizeof(char *) -
362 _ALIGN(p) + (size_t)p);
363 p = (char *)_ALIGN(p);
365 NS_APPLY_OFFSET(grp->gr_name, orig_buf, p, char *);
366 NS_APPLY_OFFSET(grp->gr_passwd, orig_buf, p, char *);
367 if (grp->gr_mem != NULL) {
368 NS_APPLY_OFFSET(grp->gr_mem, orig_buf, p, char **);
370 for (mem = grp->gr_mem; *mem; ++mem)
371 NS_APPLY_OFFSET(*mem, orig_buf, p, char *);
375 *((struct group **)retval) = grp;
380 NSS_MP_CACHE_HANDLING(group);
381 #endif /* NS_CACHING */
384 static const nss_cache_info setgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
385 group, (void *)nss_lt_all,
389 static const ns_dtab setgrent_dtab[] = {
390 { NSSRC_FILES, files_setgrent, (void *)SETGRENT },
392 { NSSRC_DNS, dns_setgrent, (void *)SETGRENT },
395 { NSSRC_NIS, nis_setgrent, (void *)SETGRENT },
397 { NSSRC_COMPAT, compat_setgrent, (void *)SETGRENT },
399 NS_CACHE_CB(&setgrent_cache_info)
405 static const nss_cache_info endgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
406 group, (void *)nss_lt_all,
410 static const ns_dtab endgrent_dtab[] = {
411 { NSSRC_FILES, files_setgrent, (void *)ENDGRENT },
413 { NSSRC_DNS, dns_setgrent, (void *)ENDGRENT },
416 { NSSRC_NIS, nis_setgrent, (void *)ENDGRENT },
418 { NSSRC_COMPAT, compat_setgrent, (void *)ENDGRENT },
420 NS_CACHE_CB(&endgrent_cache_info)
426 static const nss_cache_info getgrent_r_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
427 group, (void *)nss_lt_all,
428 grp_marshal_func, grp_unmarshal_func);
431 static const ns_dtab getgrent_r_dtab[] = {
432 { NSSRC_FILES, files_group, (void *)nss_lt_all },
434 { NSSRC_DNS, dns_group, (void *)nss_lt_all },
437 { NSSRC_NIS, nis_group, (void *)nss_lt_all },
439 { NSSRC_COMPAT, compat_group, (void *)nss_lt_all },
441 NS_CACHE_CB(&getgrent_r_cache_info)
447 gr_addgid(gid_t gid, gid_t *groups, int maxgrp, int *grpcnt)
451 for (dupc = 1; dupc < MIN(maxgrp, *grpcnt); dupc++) {
452 if (groups[dupc] == gid)
457 if (*grpcnt < maxgrp)
458 groups[*grpcnt] = gid;
468 getgroupmembership_fallback(void *retval, void *mdata, va_list ap)
470 const ns_src src[] = {
471 { mdata, NS_SUCCESS },
482 int i, rv, ret_errno;
485 * As this is a fallback method, only provided src
486 * list will be respected during methods search.
488 assert(src[0].name != NULL);
490 uname = va_arg(ap, const char *);
491 agroup = va_arg(ap, gid_t);
492 groups = va_arg(ap, gid_t *);
493 maxgrp = va_arg(ap, int);
494 grpcnt = va_arg(ap, int *);
498 buf = malloc(GRP_STORAGE_INITIAL);
502 bufsize = GRP_STORAGE_INITIAL;
504 gr_addgid(agroup, groups, maxgrp, grpcnt);
506 _nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", src, 0);
511 rv = _nsdispatch(&grp_p, getgrent_r_dtab, NSDB_GROUP,
512 "getgrent_r", src, &grp, buf, bufsize, &ret_errno);
514 if (grp_p == NULL && ret_errno == ERANGE) {
516 if ((bufsize << 1) > GRP_STORAGE_MAX) {
523 buf = malloc(bufsize);
528 } while (grp_p == NULL && ret_errno == ERANGE);
530 if (ret_errno != 0) {
538 for (i = 0; grp.gr_mem[i]; i++) {
539 if (strcmp(grp.gr_mem[i], uname) == 0)
540 gr_addgid(grp.gr_gid, groups, maxgrp, grpcnt);
544 _nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", src);
553 (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc, 0);
558 setgroupent(int stayopen)
560 (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc,
569 (void)_nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", defaultsrc);
574 getgrent_r(struct group *grp, char *buffer, size_t bufsize,
575 struct group **result)
581 rv = _nsdispatch(result, getgrent_r_dtab, NSDB_GROUP, "getgrent_r", defaultsrc,
582 grp, buffer, bufsize, &ret_errno);
583 if (rv == NS_SUCCESS)
591 getgrnam_r(const char *name, struct group *grp, char *buffer, size_t bufsize,
592 struct group **result)
595 static const nss_cache_info cache_info =
596 NS_COMMON_CACHE_INFO_INITIALIZER(
597 group, (void *)nss_lt_name,
598 grp_id_func, grp_marshal_func, grp_unmarshal_func);
601 static const ns_dtab dtab[] = {
602 { NSSRC_FILES, files_group, (void *)nss_lt_name },
604 { NSSRC_DNS, dns_group, (void *)nss_lt_name },
607 { NSSRC_NIS, nis_group, (void *)nss_lt_name },
609 { NSSRC_COMPAT, compat_group, (void *)nss_lt_name },
611 NS_CACHE_CB(&cache_info)
619 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrnam_r", defaultsrc,
620 name, grp, buffer, bufsize, &ret_errno);
621 if (rv == NS_SUCCESS)
629 getgrgid_r(gid_t gid, struct group *grp, char *buffer, size_t bufsize,
630 struct group **result)
633 static const nss_cache_info cache_info =
634 NS_COMMON_CACHE_INFO_INITIALIZER(
635 group, (void *)nss_lt_id,
636 grp_id_func, grp_marshal_func, grp_unmarshal_func);
639 static const ns_dtab dtab[] = {
640 { NSSRC_FILES, files_group, (void *)nss_lt_id },
642 { NSSRC_DNS, dns_group, (void *)nss_lt_id },
645 { NSSRC_NIS, nis_group, (void *)nss_lt_id },
647 { NSSRC_COMPAT, compat_group, (void *)nss_lt_id },
649 NS_CACHE_CB(&cache_info)
657 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrgid_r", defaultsrc,
658 gid, grp, buffer, bufsize, &ret_errno);
659 if (rv == NS_SUCCESS)
668 __getgroupmembership(const char *uname, gid_t agroup, gid_t *groups,
669 int maxgrp, int *grpcnt)
671 static const ns_dtab dtab[] = {
672 NS_FALLBACK_CB(getgroupmembership_fallback)
676 assert(uname != NULL);
677 /* groups may be NULL if just sizing when invoked with maxgrp = 0 */
678 assert(grpcnt != NULL);
681 (void)_nsdispatch(NULL, dtab, NSDB_GROUP, "getgroupmembership",
682 defaultsrc, uname, agroup, groups, maxgrp, grpcnt);
684 /* too many groups found? */
685 return (*grpcnt > maxgrp ? -1 : 0);
689 static struct group grp;
690 static char *grp_storage;
691 static size_t grp_storage_size;
693 static struct group *
694 getgr(int (*fn)(union key, struct group *, char *, size_t, struct group **),
700 if (grp_storage == NULL) {
701 grp_storage = malloc(GRP_STORAGE_INITIAL);
702 if (grp_storage == NULL)
704 grp_storage_size = GRP_STORAGE_INITIAL;
707 rv = fn(key, &grp, grp_storage, grp_storage_size, &res);
708 if (res == NULL && rv == ERANGE) {
710 if ((grp_storage_size << 1) > GRP_STORAGE_MAX) {
715 grp_storage_size <<= 1;
716 grp_storage = malloc(grp_storage_size);
717 if (grp_storage == NULL)
720 } while (res == NULL && rv == ERANGE);
728 wrap_getgrnam_r(union key key, struct group *grp, char *buffer, size_t bufsize,
731 return (getgrnam_r(key.name, grp, buffer, bufsize, res));
736 wrap_getgrgid_r(union key key, struct group *grp, char *buffer, size_t bufsize,
739 return (getgrgid_r(key.gid, grp, buffer, bufsize, res));
744 wrap_getgrent_r(union key key __unused, struct group *grp, char *buffer,
745 size_t bufsize, struct group **res)
747 return (getgrent_r(grp, buffer, bufsize, res));
752 getgrnam(const char *name)
757 return (getgr(wrap_getgrnam_r, key));
767 return (getgr(wrap_getgrgid_r, key));
776 key.gid = 0; /* not used */
777 return (getgr(wrap_getgrent_r, key));
782 is_comment_line(const char *s, size_t n)
789 if (*s == '#' || !isspace((unsigned char)*s))
791 return (*s == '#' || s == eom);
799 files_endstate(void *p)
804 if (((struct files_state *)p)->fp != NULL)
805 fclose(((struct files_state *)p)->fp);
811 files_setgrent(void *retval, void *mdata, va_list ap)
813 struct files_state *st;
816 rv = files_getstate(&st);
819 switch ((enum constants)(uintptr_t)mdata) {
821 stayopen = va_arg(ap, int);
825 st->fp = fopen(_PATH_GROUP, "re");
826 st->stayopen = stayopen;
829 if (st->fp != NULL) {
842 files_group(void *retval, void *mdata, va_list ap)
844 struct files_state *st;
845 enum nss_lookup_type how;
846 const char *name, *line;
850 size_t bufsize, linesize;
852 int fresh, rv, stayopen, *errnop;
857 how = (enum nss_lookup_type)(uintptr_t)mdata;
860 name = va_arg(ap, const char *);
863 gid = va_arg(ap, gid_t);
868 return (NS_NOTFOUND);
870 grp = va_arg(ap, struct group *);
871 buffer = va_arg(ap, char *);
872 bufsize = va_arg(ap, size_t);
873 errnop = va_arg(ap, int *);
874 *errnop = files_getstate(&st);
877 if (st->fp == NULL) {
878 st->fp = fopen(_PATH_GROUP, "re");
879 if (st->fp == NULL) {
885 stayopen = (how == nss_lt_all || !fresh) ? 1 : st->stayopen;
887 pos = ftello(st->fp);
888 if (how != nss_lt_all && !fresh)
891 while ((line = fgetln(st->fp, &linesize)) != NULL) {
892 if (line[linesize-1] == '\n')
894 rv = __gr_match_entry(line, linesize, how, name, gid);
895 if (rv != NS_SUCCESS)
897 /* We need room at least for the line, a string NUL
898 * terminator, alignment padding, and one (char *)
899 * pointer for the member list terminator.
901 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) {
906 memcpy(buffer, line, linesize);
907 buffer[linesize] = '\0';
908 rv = __gr_parse_entry(buffer, linesize, grp,
909 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
910 if (rv & NS_TERMINATE)
912 if (how == nss_lt_all)
913 pos = ftello(st->fp);
915 if (st->fp != NULL && !stayopen) {
919 if (st->fp != NULL && how != nss_lt_all)
920 fseeko(st->fp, pos, SEEK_SET);
921 if (rv == NS_SUCCESS && retval != NULL)
922 *(struct group **)retval = grp;
923 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL)
924 fseeko(st->fp, pos, SEEK_SET);
934 dns_endstate(void *p)
942 dns_setgrent(void *retval, void *cb_data, va_list ap)
944 struct dns_state *st;
947 rv = dns_getstate(&st);
956 dns_group(void *retval, void *mdata, va_list ap)
958 char buf[HESIOD_NAME_MAX];
959 struct dns_state *st;
961 const char *name, *label;
964 size_t bufsize, adjsize, linesize;
966 enum nss_lookup_type how;
973 how = (enum nss_lookup_type)(uintptr_t)mdata;
976 name = va_arg(ap, const char *);
979 gid = va_arg(ap, gid_t);
984 grp = va_arg(ap, struct group *);
985 buffer = va_arg(ap, char *);
986 bufsize = va_arg(ap, size_t);
987 errnop = va_arg(ap, int *);
988 *errnop = dns_getstate(&st);
991 if (hesiod_init(&ctx) != 0) {
1003 if (snprintf(buf, sizeof(buf), "%lu",
1004 (unsigned long)gid) >= sizeof(buf))
1009 if (st->counter < 0)
1011 if (snprintf(buf, sizeof(buf), "group-%ld",
1012 st->counter++) >= sizeof(buf))
1017 hes = hesiod_resolve(ctx, label,
1018 how == nss_lt_id ? "gid" : "group");
1019 if ((how == nss_lt_id && hes == NULL &&
1020 (hes = hesiod_resolve(ctx, buf, "group")) == NULL) ||
1022 if (how == nss_lt_all)
1024 if (errno != ENOENT)
1028 rv = __gr_match_entry(hes[0], strlen(hes[0]), how, name, gid);
1029 if (rv != NS_SUCCESS) {
1030 hesiod_free_list(ctx, hes);
1034 /* We need room at least for the line, a string NUL
1035 * terminator, alignment padding, and one (char *)
1036 * pointer for the member list terminator.
1038 adjsize = bufsize - _ALIGNBYTES - sizeof(char *);
1039 linesize = strlcpy(buffer, hes[0], adjsize);
1040 if (linesize >= adjsize) {
1045 hesiod_free_list(ctx, hes);
1047 rv = __gr_parse_entry(buffer, linesize, grp,
1048 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
1049 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1052 hesiod_free_list(ctx, hes);
1055 if (rv == NS_SUCCESS && retval != NULL)
1056 *(struct group **)retval = grp;
1067 nis_endstate(void *p)
1072 free(((struct nis_state *)p)->key);
1078 nis_setgrent(void *retval, void *cb_data, va_list ap)
1080 struct nis_state *st;
1083 rv = nis_getstate(&st);
1085 return (NS_UNAVAIL);
1089 return (NS_UNAVAIL);
1094 nis_group(void *retval, void *mdata, va_list ap)
1097 struct nis_state *st;
1100 char *buffer, *key, *result;
1103 enum nss_lookup_type how;
1104 int *errnop, keylen, resultlen, rv;
1108 how = (enum nss_lookup_type)(uintptr_t)mdata;
1111 name = va_arg(ap, const char *);
1112 map = "group.byname";
1115 gid = va_arg(ap, gid_t);
1116 map = "group.bygid";
1119 map = "group.byname";
1122 grp = va_arg(ap, struct group *);
1123 buffer = va_arg(ap, char *);
1124 bufsize = va_arg(ap, size_t);
1125 errnop = va_arg(ap, int *);
1126 *errnop = nis_getstate(&st);
1128 return (NS_UNAVAIL);
1129 if (st->domain[0] == '\0') {
1130 if (getdomainname(st->domain, sizeof(st->domain)) != 0) {
1132 return (NS_UNAVAIL);
1140 if (strlcpy(buffer, name, bufsize) >= bufsize)
1144 if (snprintf(buffer, bufsize, "%lu",
1145 (unsigned long)gid) >= bufsize)
1154 if (how == nss_lt_all) {
1155 if (st->key == NULL)
1156 rv = yp_first(st->domain, map, &st->key,
1157 &st->keylen, &result, &resultlen);
1160 keylen = st->keylen;
1162 rv = yp_next(st->domain, map, key, keylen,
1163 &st->key, &st->keylen, &result,
1171 if (rv == YPERR_NOMORE) {
1179 rv = yp_match(st->domain, map, buffer, strlen(buffer),
1180 &result, &resultlen);
1181 if (rv == YPERR_KEY) {
1184 } else if (rv != 0) {
1190 /* We need room at least for the line, a string NUL
1191 * terminator, alignment padding, and one (char *)
1192 * pointer for the member list terminator.
1194 if (resultlen >= bufsize - _ALIGNBYTES - sizeof(char *)) {
1198 memcpy(buffer, result, resultlen);
1199 buffer[resultlen] = '\0';
1201 rv = __gr_match_entry(buffer, resultlen, how, name, gid);
1202 if (rv == NS_SUCCESS)
1203 rv = __gr_parse_entry(buffer, resultlen, grp,
1204 &buffer[resultlen+1], bufsize - resultlen - 1,
1206 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1208 if (rv == NS_SUCCESS && retval != NULL)
1209 *(struct group **)retval = grp;
1223 compat_endstate(void *p)
1225 struct compat_state *st;
1229 st = (struct compat_state *)p;
1238 compat_setgrent(void *retval, void *mdata, va_list ap)
1240 static const ns_src compatsrc[] = {
1242 { NSSRC_NIS, NS_SUCCESS },
1248 { NSSRC_DNS, dns_setgrent, NULL },
1251 { NSSRC_NIS, nis_setgrent, NULL },
1253 { NULL, NULL, NULL }
1255 struct compat_state *st;
1258 #define set_setent(x, y) do { \
1260 for (i = 0; i < (int)(nitems(x) - 1); i++) \
1261 x[i].mdata = (void *)y; \
1264 rv = compat_getstate(&st);
1266 return (NS_UNAVAIL);
1267 switch ((enum constants)(uintptr_t)mdata) {
1269 stayopen = va_arg(ap, int);
1273 st->fp = fopen(_PATH_GROUP, "re");
1274 st->stayopen = stayopen;
1275 set_setent(dtab, mdata);
1276 (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "setgrent",
1280 if (st->fp != NULL) {
1284 set_setent(dtab, mdata);
1285 (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "endgrent",
1291 st->compat = COMPAT_MODE_OFF;
1294 return (NS_UNAVAIL);
1300 compat_group(void *retval, void *mdata, va_list ap)
1302 static const ns_src compatsrc[] = {
1304 { NSSRC_NIS, NS_SUCCESS },
1310 { NSSRC_NIS, nis_group, NULL },
1313 { NSSRC_DNS, dns_group, NULL },
1315 { NULL, NULL, NULL }
1317 struct compat_state *st;
1318 enum nss_lookup_type how;
1319 const char *name, *line;
1324 size_t bufsize, linesize;
1326 int fresh, rv, stayopen, *errnop;
1328 #define set_lookup_type(x, y) do { \
1330 for (i = 0; i < (int)(nitems(x) - 1); i++) \
1331 x[i].mdata = (void *)y; \
1337 how = (enum nss_lookup_type)(uintptr_t)mdata;
1340 name = va_arg(ap, const char *);
1343 gid = va_arg(ap, gid_t);
1348 return (NS_NOTFOUND);
1350 grp = va_arg(ap, struct group *);
1351 buffer = va_arg(ap, char *);
1352 bufsize = va_arg(ap, size_t);
1353 errnop = va_arg(ap, int *);
1354 *errnop = compat_getstate(&st);
1356 return (NS_UNAVAIL);
1357 if (st->fp == NULL) {
1358 st->fp = fopen(_PATH_GROUP, "re");
1359 if (st->fp == NULL) {
1366 stayopen = (how == nss_lt_all || !fresh) ? 1 : st->stayopen;
1368 pos = ftello(st->fp);
1369 if (how != nss_lt_all && !fresh)
1372 switch (st->compat) {
1373 case COMPAT_MODE_ALL:
1374 set_lookup_type(dtab, how);
1377 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1378 "getgrent_r", compatsrc, grp, buffer, bufsize,
1382 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1383 "getgrgid_r", compatsrc, gid, grp, buffer, bufsize,
1387 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1388 "getgrnam_r", compatsrc, name, grp, buffer,
1392 if (rv & NS_TERMINATE)
1394 st->compat = COMPAT_MODE_OFF;
1396 case COMPAT_MODE_NAME:
1397 set_lookup_type(dtab, nss_lt_name);
1398 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1399 "getgrnam_r", compatsrc, st->name, grp, buffer, bufsize,
1405 if (strcmp(name, grp->gr_name) != 0)
1409 if (gid != grp->gr_gid)
1423 st->compat = COMPAT_MODE_OFF;
1424 if (rv == NS_SUCCESS)
1431 while ((line = fgetln(st->fp, &linesize)) != NULL) {
1432 if (line[linesize-1] == '\n')
1434 if (linesize > 2 && line[0] == '+') {
1435 p = memchr(&line[1], ':', linesize);
1436 if (p == NULL || p == &line[1])
1437 st->compat = COMPAT_MODE_ALL;
1439 st->name = malloc(p - line);
1440 if (st->name == NULL) {
1442 "getgrent memory allocation failure");
1447 memcpy(st->name, &line[1], p - line - 1);
1448 st->name[p - line - 1] = '\0';
1449 st->compat = COMPAT_MODE_NAME;
1453 rv = __gr_match_entry(line, linesize, how, name, gid);
1454 if (rv != NS_SUCCESS)
1456 /* We need room at least for the line, a string NUL
1457 * terminator, alignment padding, and one (char *)
1458 * pointer for the member list terminator.
1460 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) {
1465 memcpy(buffer, line, linesize);
1466 buffer[linesize] = '\0';
1467 rv = __gr_parse_entry(buffer, linesize, grp,
1468 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
1469 if (rv & NS_TERMINATE)
1471 if (how == nss_lt_all)
1472 pos = ftello(st->fp);
1475 if (st->fp != NULL && !stayopen) {
1479 if (st->fp != NULL && how != nss_lt_all)
1480 fseeko(st->fp, pos, SEEK_SET);
1481 if (rv == NS_SUCCESS && retval != NULL)
1482 *(struct group **)retval = grp;
1483 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL)
1484 fseeko(st->fp, pos, SEEK_SET);
1486 #undef set_lookup_type
1491 * common group line matching and parsing
1494 __gr_match_entry(const char *line, size_t linesize, enum nss_lookup_type how,
1495 const char *name, gid_t gid)
1498 const char *p, *eol;
1503 if (linesize == 0 || is_comment_line(line, linesize))
1504 return (NS_NOTFOUND);
1506 case nss_lt_name: needed = 1; break;
1507 case nss_lt_id: needed = 2; break;
1508 default: needed = 2; break;
1510 eol = &line[linesize];
1511 for (p = line, i = 0; i < needed && p < eol; p++)
1515 return (NS_NOTFOUND);
1518 namesize = strlen(name);
1519 if (namesize + 1 == (size_t)(p - line) &&
1520 memcmp(line, name, namesize) == 0)
1521 return (NS_SUCCESS);
1524 n = strtoul(p, &q, 10);
1525 if (q < eol && *q == ':' && gid == (gid_t)n)
1526 return (NS_SUCCESS);
1529 return (NS_SUCCESS);
1533 return (NS_NOTFOUND);
1538 __gr_parse_entry(char *line, size_t linesize, struct group *grp, char *membuf,
1539 size_t membufsize, int *errnop)
1541 char *s_gid, *s_mem, *p, **members;
1545 memset(grp, 0, sizeof(*grp));
1546 members = (char **)_ALIGN(membuf);
1547 membufsize -= (char *)members - membuf;
1548 maxmembers = membufsize / sizeof(*members);
1549 if (maxmembers <= 0 ||
1550 (grp->gr_name = strsep(&line, ":")) == NULL ||
1551 grp->gr_name[0] == '\0' ||
1552 (grp->gr_passwd = strsep(&line, ":")) == NULL ||
1553 (s_gid = strsep(&line, ":")) == NULL ||
1555 return (NS_NOTFOUND);
1557 n = strtoul(s_gid, &s_gid, 10);
1558 if (s_gid[0] != '\0')
1559 return (NS_NOTFOUND);
1560 grp->gr_gid = (gid_t)n;
1561 grp->gr_mem = members;
1562 while (maxmembers > 1 && s_mem != NULL) {
1563 p = strsep(&s_mem, ",");
1564 if (p != NULL && *p != '\0') {
1571 return (NS_SUCCESS);