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 "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 __getgroupmembership(const char *, gid_t, gid_t *, int, int *);
78 int __gr_match_entry(const char *, size_t, enum nss_lookup_type,
80 int __gr_parse_entry(char *, size_t, struct group *, char *, size_t,
83 static int is_comment_line(const char *, size_t);
89 static struct group *getgr(int (*)(union key, struct group *, char *, size_t,
90 struct group **), union key);
91 static int wrap_getgrnam_r(union key, struct group *, char *, size_t,
93 static int wrap_getgrgid_r(union key, struct group *, char *, size_t,
95 static int wrap_getgrent_r(union key, struct group *, char *, size_t,
102 static void files_endstate(void *);
103 NSS_TLS_HANDLING(files);
104 static int files_setgrent(void *, void *, va_list);
105 static int files_group(void *, void *, va_list);
112 static void dns_endstate(void *);
113 NSS_TLS_HANDLING(dns);
114 static int dns_setgrent(void *, void *, va_list);
115 static int dns_group(void *, void *, va_list);
121 char domain[MAXHOSTNAMELEN];
126 static void nis_endstate(void *);
127 NSS_TLS_HANDLING(nis);
128 static int nis_setgrent(void *, void *, va_list);
129 static int nis_group(void *, void *, va_list);
132 struct compat_state {
142 static void compat_endstate(void *);
143 NSS_TLS_HANDLING(compat);
144 static int compat_setgrent(void *, void *, va_list);
145 static int compat_group(void *, void *, va_list);
147 static int gr_addgid(gid_t, gid_t *, int, int *);
148 static int getgroupmembership_fallback(void *, void *, va_list);
151 static int grp_id_func(char *, size_t *, va_list, void *);
152 static int grp_marshal_func(char *, size_t *, void *, va_list, void *);
153 static int grp_unmarshal_func(char *, size_t, void *, va_list, void *);
156 grp_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata)
161 size_t desired_size, size;
162 int res = NS_UNAVAIL;
163 enum nss_lookup_type lookup_type;
166 lookup_type = (enum nss_lookup_type)(uintptr_t)cache_mdata;
167 switch (lookup_type) {
169 name = va_arg(ap, char *);
171 desired_size = sizeof(enum nss_lookup_type) + size + 1;
172 if (desired_size > *buffer_size) {
177 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
178 memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1);
183 gid = va_arg(ap, gid_t);
184 desired_size = sizeof(enum nss_lookup_type) + sizeof(gid_t);
185 if (desired_size > *buffer_size) {
190 memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type));
191 memcpy(buffer + sizeof(enum nss_lookup_type), &gid,
197 /* should be unreachable */
202 *buffer_size = desired_size;
207 grp_marshal_func(char *buffer, size_t *buffer_size, void *retval, va_list ap,
213 char *orig_buf __unused;
214 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)(uintptr_t)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)(uintptr_t)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 *);
333 if (orig_buf_size + sizeof(struct group) + sizeof(char *) < buffer_size)
337 } else if (buffer_size < sizeof(struct group) + sizeof(char *)) {
339 * nscd(8) sometimes returns buffer_size=1 for nonexistent
343 return (NS_NOTFOUND);
346 memcpy(grp, buffer, sizeof(struct group));
347 memcpy(&p, buffer + sizeof(struct group), sizeof(char *));
349 if (orig_buf_size + sizeof(struct group) + sizeof(char *) +
350 _ALIGN(p) - (size_t)p < buffer_size) {
355 orig_buf = (char *)_ALIGN(orig_buf);
356 memcpy(orig_buf, buffer + sizeof(struct group) + sizeof(char *) +
357 _ALIGN(p) - (size_t)p,
358 buffer_size - sizeof(struct group) - sizeof(char *) -
359 _ALIGN(p) + (size_t)p);
360 p = (char *)_ALIGN(p);
362 NS_APPLY_OFFSET(grp->gr_name, orig_buf, p, char *);
363 NS_APPLY_OFFSET(grp->gr_passwd, orig_buf, p, char *);
364 if (grp->gr_mem != NULL) {
365 NS_APPLY_OFFSET(grp->gr_mem, orig_buf, p, char **);
367 for (mem = grp->gr_mem; *mem; ++mem)
368 NS_APPLY_OFFSET(*mem, orig_buf, p, char *);
372 *((struct group **)retval) = grp;
377 NSS_MP_CACHE_HANDLING(group);
378 #endif /* NS_CACHING */
381 static const nss_cache_info setgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
382 group, (void *)nss_lt_all,
386 static const ns_dtab setgrent_dtab[] = {
387 { NSSRC_FILES, files_setgrent, (void *)SETGRENT },
389 { NSSRC_DNS, dns_setgrent, (void *)SETGRENT },
392 { NSSRC_NIS, nis_setgrent, (void *)SETGRENT },
394 { NSSRC_COMPAT, compat_setgrent, (void *)SETGRENT },
396 NS_CACHE_CB(&setgrent_cache_info)
402 static const nss_cache_info endgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
403 group, (void *)nss_lt_all,
407 static const ns_dtab endgrent_dtab[] = {
408 { NSSRC_FILES, files_setgrent, (void *)ENDGRENT },
410 { NSSRC_DNS, dns_setgrent, (void *)ENDGRENT },
413 { NSSRC_NIS, nis_setgrent, (void *)ENDGRENT },
415 { NSSRC_COMPAT, compat_setgrent, (void *)ENDGRENT },
417 NS_CACHE_CB(&endgrent_cache_info)
423 static const nss_cache_info getgrent_r_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
424 group, (void *)nss_lt_all,
425 grp_marshal_func, grp_unmarshal_func);
428 static const ns_dtab getgrent_r_dtab[] = {
429 { NSSRC_FILES, files_group, (void *)nss_lt_all },
431 { NSSRC_DNS, dns_group, (void *)nss_lt_all },
434 { NSSRC_NIS, nis_group, (void *)nss_lt_all },
436 { NSSRC_COMPAT, compat_group, (void *)nss_lt_all },
438 NS_CACHE_CB(&getgrent_r_cache_info)
444 gr_addgid(gid_t gid, gid_t *groups, int maxgrp, int *grpcnt)
448 for (dupc = 1; dupc < MIN(maxgrp, *grpcnt); dupc++) {
449 if (groups[dupc] == gid)
454 if (*grpcnt < maxgrp)
455 groups[*grpcnt] = gid;
465 getgroupmembership_fallback(void *retval, void *mdata, va_list ap)
467 const ns_src src[] = {
468 { mdata, NS_SUCCESS },
479 int i, rv, ret_errno;
482 * As this is a fallback method, only provided src
483 * list will be respected during methods search.
485 assert(src[0].name != NULL);
487 uname = va_arg(ap, const char *);
488 agroup = va_arg(ap, gid_t);
489 groups = va_arg(ap, gid_t *);
490 maxgrp = va_arg(ap, int);
491 grpcnt = va_arg(ap, int *);
495 buf = malloc(GRP_STORAGE_INITIAL);
499 bufsize = GRP_STORAGE_INITIAL;
501 gr_addgid(agroup, groups, maxgrp, grpcnt);
503 _nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", src, 0);
508 rv = _nsdispatch(&grp_p, getgrent_r_dtab, NSDB_GROUP,
509 "getgrent_r", src, &grp, buf, bufsize, &ret_errno);
511 if (grp_p == NULL && ret_errno == ERANGE) {
513 if ((bufsize << 1) > GRP_STORAGE_MAX) {
520 buf = malloc(bufsize);
525 } while (grp_p == NULL && ret_errno == ERANGE);
527 if (ret_errno != 0) {
535 for (i = 0; grp.gr_mem[i]; i++) {
536 if (strcmp(grp.gr_mem[i], uname) == 0)
537 gr_addgid(grp.gr_gid, groups, maxgrp, grpcnt);
541 _nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", src);
550 (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc, 0);
555 setgroupent(int stayopen)
557 (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc,
566 (void)_nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", defaultsrc);
571 getgrent_r(struct group *grp, char *buffer, size_t bufsize,
572 struct group **result)
578 rv = _nsdispatch(result, getgrent_r_dtab, NSDB_GROUP, "getgrent_r", defaultsrc,
579 grp, buffer, bufsize, &ret_errno);
580 if (rv == NS_SUCCESS)
588 getgrnam_r(const char *name, struct group *grp, char *buffer, size_t bufsize,
589 struct group **result)
592 static const nss_cache_info cache_info =
593 NS_COMMON_CACHE_INFO_INITIALIZER(
594 group, (void *)nss_lt_name,
595 grp_id_func, grp_marshal_func, grp_unmarshal_func);
598 static const ns_dtab dtab[] = {
599 { NSSRC_FILES, files_group, (void *)nss_lt_name },
601 { NSSRC_DNS, dns_group, (void *)nss_lt_name },
604 { NSSRC_NIS, nis_group, (void *)nss_lt_name },
606 { NSSRC_COMPAT, compat_group, (void *)nss_lt_name },
608 NS_CACHE_CB(&cache_info)
616 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrnam_r", defaultsrc,
617 name, grp, buffer, bufsize, &ret_errno);
618 if (rv == NS_SUCCESS)
626 getgrgid_r(gid_t gid, struct group *grp, char *buffer, size_t bufsize,
627 struct group **result)
630 static const nss_cache_info cache_info =
631 NS_COMMON_CACHE_INFO_INITIALIZER(
632 group, (void *)nss_lt_id,
633 grp_id_func, grp_marshal_func, grp_unmarshal_func);
636 static const ns_dtab dtab[] = {
637 { NSSRC_FILES, files_group, (void *)nss_lt_id },
639 { NSSRC_DNS, dns_group, (void *)nss_lt_id },
642 { NSSRC_NIS, nis_group, (void *)nss_lt_id },
644 { NSSRC_COMPAT, compat_group, (void *)nss_lt_id },
646 NS_CACHE_CB(&cache_info)
654 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrgid_r", defaultsrc,
655 gid, grp, buffer, bufsize, &ret_errno);
656 if (rv == NS_SUCCESS)
665 __getgroupmembership(const char *uname, gid_t agroup, gid_t *groups,
666 int maxgrp, int *grpcnt)
668 static const ns_dtab dtab[] = {
669 NS_FALLBACK_CB(getgroupmembership_fallback)
673 assert(uname != NULL);
674 /* groups may be NULL if just sizing when invoked with maxgrp = 0 */
675 assert(grpcnt != NULL);
678 (void)_nsdispatch(NULL, dtab, NSDB_GROUP, "getgroupmembership",
679 defaultsrc, uname, agroup, groups, maxgrp, grpcnt);
681 /* too many groups found? */
682 return (*grpcnt > maxgrp ? -1 : 0);
686 static struct group grp;
687 static char *grp_storage;
688 static size_t grp_storage_size;
690 static struct group *
691 getgr(int (*fn)(union key, struct group *, char *, size_t, struct group **),
697 if (grp_storage == NULL) {
698 grp_storage = malloc(GRP_STORAGE_INITIAL);
699 if (grp_storage == NULL)
701 grp_storage_size = GRP_STORAGE_INITIAL;
704 rv = fn(key, &grp, grp_storage, grp_storage_size, &res);
705 if (res == NULL && rv == ERANGE) {
707 if ((grp_storage_size << 1) > GRP_STORAGE_MAX) {
712 grp_storage_size <<= 1;
713 grp_storage = malloc(grp_storage_size);
714 if (grp_storage == NULL)
717 } while (res == NULL && rv == ERANGE);
725 wrap_getgrnam_r(union key key, struct group *grp, char *buffer, size_t bufsize,
728 return (getgrnam_r(key.name, grp, buffer, bufsize, res));
733 wrap_getgrgid_r(union key key, struct group *grp, char *buffer, size_t bufsize,
736 return (getgrgid_r(key.gid, grp, buffer, bufsize, res));
741 wrap_getgrent_r(union key key __unused, struct group *grp, char *buffer,
742 size_t bufsize, struct group **res)
744 return (getgrent_r(grp, buffer, bufsize, res));
749 getgrnam(const char *name)
754 return (getgr(wrap_getgrnam_r, key));
764 return (getgr(wrap_getgrgid_r, key));
773 key.gid = 0; /* not used */
774 return (getgr(wrap_getgrent_r, key));
779 is_comment_line(const char *s, size_t n)
786 if (*s == '#' || !isspace((unsigned char)*s))
788 return (*s == '#' || s == eom);
796 files_endstate(void *p)
801 if (((struct files_state *)p)->fp != NULL)
802 fclose(((struct files_state *)p)->fp);
808 files_setgrent(void *retval, void *mdata, va_list ap)
810 struct files_state *st;
813 rv = files_getstate(&st);
816 switch ((enum constants)(uintptr_t)mdata) {
818 stayopen = va_arg(ap, int);
822 st->fp = fopen(_PATH_GROUP, "re");
823 st->stayopen = stayopen;
826 if (st->fp != NULL) {
839 files_group(void *retval, void *mdata, va_list ap)
841 struct files_state *st;
842 enum nss_lookup_type how;
843 const char *name, *line;
847 size_t bufsize, linesize;
849 int fresh, rv, stayopen, *errnop;
854 how = (enum nss_lookup_type)(uintptr_t)mdata;
857 name = va_arg(ap, const char *);
860 gid = va_arg(ap, gid_t);
865 return (NS_NOTFOUND);
867 grp = va_arg(ap, struct group *);
868 buffer = va_arg(ap, char *);
869 bufsize = va_arg(ap, size_t);
870 errnop = va_arg(ap, int *);
871 *errnop = files_getstate(&st);
874 if (st->fp == NULL) {
875 st->fp = fopen(_PATH_GROUP, "re");
876 if (st->fp == NULL) {
882 stayopen = (how == nss_lt_all || !fresh) ? 1 : st->stayopen;
884 pos = ftello(st->fp);
885 if (how != nss_lt_all && !fresh)
888 while ((line = fgetln(st->fp, &linesize)) != NULL) {
889 if (line[linesize-1] == '\n')
891 rv = __gr_match_entry(line, linesize, how, name, gid);
892 if (rv != NS_SUCCESS)
894 /* We need room at least for the line, a string NUL
895 * terminator, alignment padding, and one (char *)
896 * pointer for the member list terminator.
898 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) {
903 memcpy(buffer, line, linesize);
904 buffer[linesize] = '\0';
905 rv = __gr_parse_entry(buffer, linesize, grp,
906 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
907 if (rv & NS_TERMINATE)
909 if (how == nss_lt_all)
910 pos = ftello(st->fp);
912 if (st->fp != NULL && !stayopen) {
916 if (st->fp != NULL && how != nss_lt_all)
917 fseeko(st->fp, pos, SEEK_SET);
918 if (rv == NS_SUCCESS && retval != NULL)
919 *(struct group **)retval = grp;
920 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL)
921 fseeko(st->fp, pos, SEEK_SET);
931 dns_endstate(void *p)
939 dns_setgrent(void *retval, void *cb_data, va_list ap)
941 struct dns_state *st;
944 rv = dns_getstate(&st);
953 dns_group(void *retval, void *mdata, va_list ap)
955 char buf[HESIOD_NAME_MAX];
956 struct dns_state *st;
958 const char *name, *label;
961 size_t bufsize, adjsize, linesize;
963 enum nss_lookup_type how;
970 how = (enum nss_lookup_type)(uintptr_t)mdata;
973 name = va_arg(ap, const char *);
976 gid = va_arg(ap, gid_t);
981 grp = va_arg(ap, struct group *);
982 buffer = va_arg(ap, char *);
983 bufsize = va_arg(ap, size_t);
984 errnop = va_arg(ap, int *);
985 *errnop = dns_getstate(&st);
988 if (hesiod_init(&ctx) != 0) {
1000 if (snprintf(buf, sizeof(buf), "%lu",
1001 (unsigned long)gid) >= sizeof(buf))
1006 if (st->counter < 0)
1008 if (snprintf(buf, sizeof(buf), "group-%ld",
1009 st->counter++) >= sizeof(buf))
1014 hes = hesiod_resolve(ctx, label,
1015 how == nss_lt_id ? "gid" : "group");
1016 if ((how == nss_lt_id && hes == NULL &&
1017 (hes = hesiod_resolve(ctx, buf, "group")) == NULL) ||
1019 if (how == nss_lt_all)
1021 if (errno != ENOENT)
1025 rv = __gr_match_entry(hes[0], strlen(hes[0]), how, name, gid);
1026 if (rv != NS_SUCCESS) {
1027 hesiod_free_list(ctx, hes);
1031 /* We need room at least for the line, a string NUL
1032 * terminator, alignment padding, and one (char *)
1033 * pointer for the member list terminator.
1035 adjsize = bufsize - _ALIGNBYTES - sizeof(char *);
1036 linesize = strlcpy(buffer, hes[0], adjsize);
1037 if (linesize >= adjsize) {
1042 hesiod_free_list(ctx, hes);
1044 rv = __gr_parse_entry(buffer, linesize, grp,
1045 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
1046 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1049 hesiod_free_list(ctx, hes);
1052 if (rv == NS_SUCCESS && retval != NULL)
1053 *(struct group **)retval = grp;
1064 nis_endstate(void *p)
1069 free(((struct nis_state *)p)->key);
1075 nis_setgrent(void *retval, void *cb_data, va_list ap)
1077 struct nis_state *st;
1080 rv = nis_getstate(&st);
1082 return (NS_UNAVAIL);
1086 return (NS_UNAVAIL);
1091 nis_group(void *retval, void *mdata, va_list ap)
1094 struct nis_state *st;
1097 char *buffer, *key, *result;
1100 enum nss_lookup_type how;
1101 int *errnop, keylen, resultlen, rv;
1105 how = (enum nss_lookup_type)(uintptr_t)mdata;
1108 name = va_arg(ap, const char *);
1109 map = "group.byname";
1112 gid = va_arg(ap, gid_t);
1113 map = "group.bygid";
1116 map = "group.byname";
1119 grp = va_arg(ap, struct group *);
1120 buffer = va_arg(ap, char *);
1121 bufsize = va_arg(ap, size_t);
1122 errnop = va_arg(ap, int *);
1123 *errnop = nis_getstate(&st);
1125 return (NS_UNAVAIL);
1126 if (st->domain[0] == '\0') {
1127 if (getdomainname(st->domain, sizeof(st->domain)) != 0) {
1129 return (NS_UNAVAIL);
1137 if (strlcpy(buffer, name, bufsize) >= bufsize)
1141 if (snprintf(buffer, bufsize, "%lu",
1142 (unsigned long)gid) >= bufsize)
1151 if (how == nss_lt_all) {
1152 if (st->key == NULL)
1153 rv = yp_first(st->domain, map, &st->key,
1154 &st->keylen, &result, &resultlen);
1157 keylen = st->keylen;
1159 rv = yp_next(st->domain, map, key, keylen,
1160 &st->key, &st->keylen, &result,
1168 if (rv == YPERR_NOMORE) {
1176 rv = yp_match(st->domain, map, buffer, strlen(buffer),
1177 &result, &resultlen);
1178 if (rv == YPERR_KEY) {
1181 } else if (rv != 0) {
1187 /* We need room at least for the line, a string NUL
1188 * terminator, alignment padding, and one (char *)
1189 * pointer for the member list terminator.
1191 if (resultlen >= bufsize - _ALIGNBYTES - sizeof(char *)) {
1195 memcpy(buffer, result, resultlen);
1196 buffer[resultlen] = '\0';
1198 rv = __gr_match_entry(buffer, resultlen, how, name, gid);
1199 if (rv == NS_SUCCESS)
1200 rv = __gr_parse_entry(buffer, resultlen, grp,
1201 &buffer[resultlen+1], bufsize - resultlen - 1,
1203 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1205 if (rv == NS_SUCCESS && retval != NULL)
1206 *(struct group **)retval = grp;
1220 compat_endstate(void *p)
1222 struct compat_state *st;
1226 st = (struct compat_state *)p;
1235 compat_setgrent(void *retval, void *mdata, va_list ap)
1237 static const ns_src compatsrc[] = {
1239 { NSSRC_NIS, NS_SUCCESS },
1245 { NSSRC_DNS, dns_setgrent, NULL },
1248 { NSSRC_NIS, nis_setgrent, NULL },
1250 { NULL, NULL, NULL }
1252 struct compat_state *st;
1255 #define set_setent(x, y) do { \
1257 for (i = 0; i < (int)(nitems(x) - 1); i++) \
1258 x[i].mdata = (void *)y; \
1261 rv = compat_getstate(&st);
1263 return (NS_UNAVAIL);
1264 switch ((enum constants)(uintptr_t)mdata) {
1266 stayopen = va_arg(ap, int);
1270 st->fp = fopen(_PATH_GROUP, "re");
1271 st->stayopen = stayopen;
1272 set_setent(dtab, mdata);
1273 (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "setgrent",
1277 if (st->fp != NULL) {
1281 set_setent(dtab, mdata);
1282 (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "endgrent",
1288 st->compat = COMPAT_MODE_OFF;
1291 return (NS_UNAVAIL);
1297 compat_group(void *retval, void *mdata, va_list ap)
1299 static const ns_src compatsrc[] = {
1301 { NSSRC_NIS, NS_SUCCESS },
1307 { NSSRC_NIS, nis_group, NULL },
1310 { NSSRC_DNS, dns_group, NULL },
1312 { NULL, NULL, NULL }
1314 struct compat_state *st;
1315 enum nss_lookup_type how;
1316 const char *name, *line;
1321 size_t bufsize, linesize;
1323 int fresh, rv, stayopen, *errnop;
1325 #define set_lookup_type(x, y) do { \
1327 for (i = 0; i < (int)(nitems(x) - 1); i++) \
1328 x[i].mdata = (void *)y; \
1334 how = (enum nss_lookup_type)(uintptr_t)mdata;
1337 name = va_arg(ap, const char *);
1340 gid = va_arg(ap, gid_t);
1345 return (NS_NOTFOUND);
1347 grp = va_arg(ap, struct group *);
1348 buffer = va_arg(ap, char *);
1349 bufsize = va_arg(ap, size_t);
1350 errnop = va_arg(ap, int *);
1351 *errnop = compat_getstate(&st);
1353 return (NS_UNAVAIL);
1354 if (st->fp == NULL) {
1355 st->fp = fopen(_PATH_GROUP, "re");
1356 if (st->fp == NULL) {
1363 stayopen = (how == nss_lt_all || !fresh) ? 1 : st->stayopen;
1365 pos = ftello(st->fp);
1366 if (how != nss_lt_all && !fresh)
1369 switch (st->compat) {
1370 case COMPAT_MODE_ALL:
1371 set_lookup_type(dtab, how);
1374 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1375 "getgrent_r", compatsrc, grp, buffer, bufsize,
1379 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1380 "getgrgid_r", compatsrc, gid, grp, buffer, bufsize,
1384 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1385 "getgrnam_r", compatsrc, name, grp, buffer,
1389 if (rv & NS_TERMINATE)
1391 st->compat = COMPAT_MODE_OFF;
1393 case COMPAT_MODE_NAME:
1394 set_lookup_type(dtab, nss_lt_name);
1395 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1396 "getgrnam_r", compatsrc, st->name, grp, buffer, bufsize,
1402 if (strcmp(name, grp->gr_name) != 0)
1406 if (gid != grp->gr_gid)
1420 st->compat = COMPAT_MODE_OFF;
1421 if (rv == NS_SUCCESS)
1428 while ((line = fgetln(st->fp, &linesize)) != NULL) {
1429 if (line[linesize-1] == '\n')
1431 if (linesize > 2 && line[0] == '+') {
1432 p = memchr(&line[1], ':', linesize);
1433 if (p == NULL || p == &line[1])
1434 st->compat = COMPAT_MODE_ALL;
1436 st->name = malloc(p - line);
1437 if (st->name == NULL) {
1439 "getgrent memory allocation failure");
1444 memcpy(st->name, &line[1], p - line - 1);
1445 st->name[p - line - 1] = '\0';
1446 st->compat = COMPAT_MODE_NAME;
1450 rv = __gr_match_entry(line, linesize, how, name, gid);
1451 if (rv != NS_SUCCESS)
1453 /* We need room at least for the line, a string NUL
1454 * terminator, alignment padding, and one (char *)
1455 * pointer for the member list terminator.
1457 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) {
1462 memcpy(buffer, line, linesize);
1463 buffer[linesize] = '\0';
1464 rv = __gr_parse_entry(buffer, linesize, grp,
1465 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
1466 if (rv & NS_TERMINATE)
1468 if (how == nss_lt_all)
1469 pos = ftello(st->fp);
1472 if (st->fp != NULL && !stayopen) {
1476 if (st->fp != NULL && how != nss_lt_all)
1477 fseeko(st->fp, pos, SEEK_SET);
1478 if (rv == NS_SUCCESS && retval != NULL)
1479 *(struct group **)retval = grp;
1480 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL)
1481 fseeko(st->fp, pos, SEEK_SET);
1483 #undef set_lookup_type
1488 * common group line matching and parsing
1491 __gr_match_entry(const char *line, size_t linesize, enum nss_lookup_type how,
1492 const char *name, gid_t gid)
1495 const char *p, *eol;
1500 if (linesize == 0 || is_comment_line(line, linesize))
1501 return (NS_NOTFOUND);
1503 case nss_lt_name: needed = 1; break;
1504 case nss_lt_id: needed = 2; break;
1505 default: needed = 2; break;
1507 eol = &line[linesize];
1508 for (p = line, i = 0; i < needed && p < eol; p++)
1512 return (NS_NOTFOUND);
1515 namesize = strlen(name);
1516 if (namesize + 1 == (size_t)(p - line) &&
1517 memcmp(line, name, namesize) == 0)
1518 return (NS_SUCCESS);
1521 n = strtoul(p, &q, 10);
1522 if (q < eol && *q == ':' && gid == (gid_t)n)
1523 return (NS_SUCCESS);
1526 return (NS_SUCCESS);
1530 return (NS_NOTFOUND);
1535 __gr_parse_entry(char *line, size_t linesize, struct group *grp, char *membuf,
1536 size_t membufsize, int *errnop)
1538 char *s_gid, *s_mem, *p, **members;
1542 memset(grp, 0, sizeof(*grp));
1543 members = (char **)_ALIGN(membuf);
1544 membufsize -= (char *)members - membuf;
1545 maxmembers = membufsize / sizeof(*members);
1546 if (maxmembers <= 0 ||
1547 (grp->gr_name = strsep(&line, ":")) == NULL ||
1548 grp->gr_name[0] == '\0' ||
1549 (grp->gr_passwd = strsep(&line, ":")) == NULL ||
1550 (s_gid = strsep(&line, ":")) == NULL ||
1552 return (NS_NOTFOUND);
1554 n = strtoul(s_gid, &s_gid, 10);
1555 if (s_gid[0] != '\0')
1556 return (NS_NOTFOUND);
1557 grp->gr_gid = (gid_t)n;
1558 grp->gr_mem = members;
1559 while (maxmembers > 1 && s_mem != NULL) {
1560 p = strsep(&s_mem, ",");
1561 if (p != NULL && *p != '\0') {
1568 return (NS_SUCCESS);