2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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)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,
217 size_t orig_buf_size;
219 struct group new_grp;
220 size_t desired_size, size, mem_size;
223 switch ((enum nss_lookup_type)cache_mdata) {
225 name = va_arg(ap, char *);
228 gid = va_arg(ap, gid_t);
233 /* should be unreachable */
237 grp = va_arg(ap, struct group *);
238 orig_buf = va_arg(ap, char *);
239 orig_buf_size = va_arg(ap, size_t);
241 desired_size = _ALIGNBYTES + sizeof(struct group) + sizeof(char *);
243 if (grp->gr_name != NULL)
244 desired_size += strlen(grp->gr_name) + 1;
245 if (grp->gr_passwd != NULL)
246 desired_size += strlen(grp->gr_passwd) + 1;
248 if (grp->gr_mem != NULL) {
250 for (mem = grp->gr_mem; *mem; ++mem) {
251 desired_size += strlen(*mem) + 1;
255 desired_size += _ALIGNBYTES + (mem_size + 1) * sizeof(char *);
258 if (desired_size > *buffer_size) {
259 /* this assignment is here for future use */
260 *buffer_size = desired_size;
264 memcpy(&new_grp, grp, sizeof(struct group));
265 memset(buffer, 0, desired_size);
267 *buffer_size = desired_size;
268 p = buffer + sizeof(struct group) + sizeof(char *);
269 memcpy(buffer + sizeof(struct group), &p, sizeof(char *));
270 p = (char *)_ALIGN(p);
272 if (new_grp.gr_name != NULL) {
273 size = strlen(new_grp.gr_name);
274 memcpy(p, new_grp.gr_name, size);
279 if (new_grp.gr_passwd != NULL) {
280 size = strlen(new_grp.gr_passwd);
281 memcpy(p, new_grp.gr_passwd, size);
282 new_grp.gr_passwd = p;
286 if (new_grp.gr_mem != NULL) {
287 p = (char *)_ALIGN(p);
288 memcpy(p, new_grp.gr_mem, sizeof(char *) * mem_size);
289 new_grp.gr_mem = (char **)p;
290 p += sizeof(char *) * (mem_size + 1);
292 for (mem = new_grp.gr_mem; *mem; ++mem) {
294 memcpy(p, *mem, size);
300 memcpy(buffer, &new_grp, sizeof(struct group));
305 grp_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap,
312 size_t orig_buf_size;
318 switch ((enum nss_lookup_type)cache_mdata) {
320 name = va_arg(ap, char *);
323 gid = va_arg(ap, gid_t);
328 /* should be unreachable */
332 grp = va_arg(ap, struct group *);
333 orig_buf = va_arg(ap, char *);
334 orig_buf_size = va_arg(ap, size_t);
335 ret_errno = va_arg(ap, int *);
338 buffer_size - sizeof(struct group) - sizeof(char *)) {
343 memcpy(grp, buffer, sizeof(struct group));
344 memcpy(&p, buffer + sizeof(struct group), sizeof(char *));
346 orig_buf = (char *)_ALIGN(orig_buf);
347 memcpy(orig_buf, buffer + sizeof(struct group) + sizeof(char *) +
348 _ALIGN(p) - (size_t)p,
349 buffer_size - sizeof(struct group) - sizeof(char *) -
350 _ALIGN(p) + (size_t)p);
351 p = (char *)_ALIGN(p);
353 NS_APPLY_OFFSET(grp->gr_name, orig_buf, p, char *);
354 NS_APPLY_OFFSET(grp->gr_passwd, orig_buf, p, char *);
355 if (grp->gr_mem != NULL) {
356 NS_APPLY_OFFSET(grp->gr_mem, orig_buf, p, char **);
358 for (mem = grp->gr_mem; *mem; ++mem)
359 NS_APPLY_OFFSET(*mem, orig_buf, p, char *);
363 *((struct group **)retval) = grp;
368 NSS_MP_CACHE_HANDLING(group);
369 #endif /* NS_CACHING */
372 static const nss_cache_info setgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
373 group, (void *)nss_lt_all,
377 static const ns_dtab setgrent_dtab[] = {
378 { NSSRC_FILES, files_setgrent, (void *)SETGRENT },
380 { NSSRC_DNS, dns_setgrent, (void *)SETGRENT },
383 { NSSRC_NIS, nis_setgrent, (void *)SETGRENT },
385 { NSSRC_COMPAT, compat_setgrent, (void *)SETGRENT },
387 NS_CACHE_CB(&setgrent_cache_info)
393 static const nss_cache_info endgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
394 group, (void *)nss_lt_all,
398 static const ns_dtab endgrent_dtab[] = {
399 { NSSRC_FILES, files_setgrent, (void *)ENDGRENT },
401 { NSSRC_DNS, dns_setgrent, (void *)ENDGRENT },
404 { NSSRC_NIS, nis_setgrent, (void *)ENDGRENT },
406 { NSSRC_COMPAT, compat_setgrent, (void *)ENDGRENT },
408 NS_CACHE_CB(&endgrent_cache_info)
414 static const nss_cache_info getgrent_r_cache_info = NS_MP_CACHE_INFO_INITIALIZER(
415 group, (void *)nss_lt_all,
416 grp_marshal_func, grp_unmarshal_func);
419 static const ns_dtab getgrent_r_dtab[] = {
420 { NSSRC_FILES, files_group, (void *)nss_lt_all },
422 { NSSRC_DNS, dns_group, (void *)nss_lt_all },
425 { NSSRC_NIS, nis_group, (void *)nss_lt_all },
427 { NSSRC_COMPAT, compat_group, (void *)nss_lt_all },
429 NS_CACHE_CB(&getgrent_r_cache_info)
435 gr_addgid(gid_t gid, gid_t *groups, int maxgrp, int *grpcnt)
439 for (dupc = 1; dupc < MIN(maxgrp, *grpcnt); dupc++) {
440 if (groups[dupc] == gid)
445 if (*grpcnt < maxgrp)
446 groups[*grpcnt] = gid;
456 getgroupmembership_fallback(void *retval, void *mdata, va_list ap)
458 const ns_src src[] = {
459 { mdata, NS_SUCCESS },
470 int i, rv, ret_errno;
473 * As this is a fallback method, only provided src
474 * list will be respected during methods search.
476 assert(src[0].name != NULL);
478 uname = va_arg(ap, const char *);
479 agroup = va_arg(ap, gid_t);
480 groups = va_arg(ap, gid_t *);
481 maxgrp = va_arg(ap, int);
482 grpcnt = va_arg(ap, int *);
486 buf = malloc(GRP_STORAGE_INITIAL);
490 bufsize = GRP_STORAGE_INITIAL;
492 gr_addgid(agroup, groups, maxgrp, grpcnt);
494 _nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", src, 0);
499 rv = _nsdispatch(&grp_p, getgrent_r_dtab, NSDB_GROUP,
500 "getgrent_r", src, &grp, buf, bufsize, &ret_errno);
502 if (grp_p == NULL && ret_errno == ERANGE) {
504 if ((bufsize << 1) > GRP_STORAGE_MAX) {
511 buf = malloc(bufsize);
516 } while (grp_p == NULL && ret_errno == ERANGE);
518 if (ret_errno != 0) {
526 for (i = 0; grp.gr_mem[i]; i++) {
527 if (strcmp(grp.gr_mem[i], uname) == 0)
528 gr_addgid(grp.gr_gid, groups, maxgrp, grpcnt);
532 _nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", src);
541 (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc, 0);
546 setgroupent(int stayopen)
548 (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc,
557 (void)_nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", defaultsrc);
562 getgrent_r(struct group *grp, char *buffer, size_t bufsize,
563 struct group **result)
569 rv = _nsdispatch(result, getgrent_r_dtab, NSDB_GROUP, "getgrent_r", defaultsrc,
570 grp, buffer, bufsize, &ret_errno);
571 if (rv == NS_SUCCESS)
579 getgrnam_r(const char *name, struct group *grp, char *buffer, size_t bufsize,
580 struct group **result)
583 static const nss_cache_info cache_info =
584 NS_COMMON_CACHE_INFO_INITIALIZER(
585 group, (void *)nss_lt_name,
586 grp_id_func, grp_marshal_func, grp_unmarshal_func);
589 static const ns_dtab dtab[] = {
590 { NSSRC_FILES, files_group, (void *)nss_lt_name },
592 { NSSRC_DNS, dns_group, (void *)nss_lt_name },
595 { NSSRC_NIS, nis_group, (void *)nss_lt_name },
597 { NSSRC_COMPAT, compat_group, (void *)nss_lt_name },
599 NS_CACHE_CB(&cache_info)
607 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrnam_r", defaultsrc,
608 name, grp, buffer, bufsize, &ret_errno);
609 if (rv == NS_SUCCESS)
617 getgrgid_r(gid_t gid, struct group *grp, char *buffer, size_t bufsize,
618 struct group **result)
621 static const nss_cache_info cache_info =
622 NS_COMMON_CACHE_INFO_INITIALIZER(
623 group, (void *)nss_lt_id,
624 grp_id_func, grp_marshal_func, grp_unmarshal_func);
627 static const ns_dtab dtab[] = {
628 { NSSRC_FILES, files_group, (void *)nss_lt_id },
630 { NSSRC_DNS, dns_group, (void *)nss_lt_id },
633 { NSSRC_NIS, nis_group, (void *)nss_lt_id },
635 { NSSRC_COMPAT, compat_group, (void *)nss_lt_id },
637 NS_CACHE_CB(&cache_info)
645 rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrgid_r", defaultsrc,
646 gid, grp, buffer, bufsize, &ret_errno);
647 if (rv == NS_SUCCESS)
656 __getgroupmembership(const char *uname, gid_t agroup, gid_t *groups,
657 int maxgrp, int *grpcnt)
659 static const ns_dtab dtab[] = {
660 NS_FALLBACK_CB(getgroupmembership_fallback)
664 assert(uname != NULL);
665 /* groups may be NULL if just sizing when invoked with maxgrp = 0 */
666 assert(grpcnt != NULL);
669 (void)_nsdispatch(NULL, dtab, NSDB_GROUP, "getgroupmembership",
670 defaultsrc, uname, agroup, groups, maxgrp, grpcnt);
672 /* too many groups found? */
673 return (*grpcnt > maxgrp ? -1 : 0);
677 static struct group grp;
678 static char *grp_storage;
679 static size_t grp_storage_size;
681 static struct group *
682 getgr(int (*fn)(union key, struct group *, char *, size_t, struct group **),
688 if (grp_storage == NULL) {
689 grp_storage = malloc(GRP_STORAGE_INITIAL);
690 if (grp_storage == NULL)
692 grp_storage_size = GRP_STORAGE_INITIAL;
695 rv = fn(key, &grp, grp_storage, grp_storage_size, &res);
696 if (res == NULL && rv == ERANGE) {
698 if ((grp_storage_size << 1) > GRP_STORAGE_MAX) {
703 grp_storage_size <<= 1;
704 grp_storage = malloc(grp_storage_size);
705 if (grp_storage == NULL)
708 } while (res == NULL && rv == ERANGE);
716 wrap_getgrnam_r(union key key, struct group *grp, char *buffer, size_t bufsize,
719 return (getgrnam_r(key.name, grp, buffer, bufsize, res));
724 wrap_getgrgid_r(union key key, struct group *grp, char *buffer, size_t bufsize,
727 return (getgrgid_r(key.gid, grp, buffer, bufsize, res));
732 wrap_getgrent_r(union key key __unused, struct group *grp, char *buffer,
733 size_t bufsize, struct group **res)
735 return (getgrent_r(grp, buffer, bufsize, res));
740 getgrnam(const char *name)
745 return (getgr(wrap_getgrnam_r, key));
755 return (getgr(wrap_getgrgid_r, key));
764 key.gid = 0; /* not used */
765 return (getgr(wrap_getgrent_r, key));
770 is_comment_line(const char *s, size_t n)
777 if (*s == '#' || !isspace((unsigned char)*s))
779 return (*s == '#' || s == eom);
787 files_endstate(void *p)
792 if (((struct files_state *)p)->fp != NULL)
793 fclose(((struct files_state *)p)->fp);
799 files_setgrent(void *retval, void *mdata, va_list ap)
801 struct files_state *st;
804 rv = files_getstate(&st);
807 switch ((enum constants)mdata) {
809 stayopen = va_arg(ap, int);
813 st->fp = fopen(_PATH_GROUP, "re");
816 if (st->fp != NULL) {
829 files_group(void *retval, void *mdata, va_list ap)
831 struct files_state *st;
832 enum nss_lookup_type how;
833 const char *name, *line;
837 size_t bufsize, linesize;
839 int fresh, rv, stayopen, *errnop;
844 how = (enum nss_lookup_type)mdata;
847 name = va_arg(ap, const char *);
850 gid = va_arg(ap, gid_t);
855 return (NS_NOTFOUND);
857 grp = va_arg(ap, struct group *);
858 buffer = va_arg(ap, char *);
859 bufsize = va_arg(ap, size_t);
860 errnop = va_arg(ap, int *);
861 *errnop = files_getstate(&st);
864 if (st->fp == NULL) {
865 st->fp = fopen(_PATH_GROUP, "re");
866 if (st->fp == NULL) {
872 if (how == nss_lt_all)
877 stayopen = st->stayopen;
881 pos = ftello(st->fp);
882 while ((line = fgetln(st->fp, &linesize)) != NULL) {
883 if (line[linesize-1] == '\n')
885 rv = __gr_match_entry(line, linesize, how, name, gid);
886 if (rv != NS_SUCCESS)
888 /* We need room at least for the line, a string NUL
889 * terminator, alignment padding, and one (char *)
890 * pointer for the member list terminator.
892 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) {
897 memcpy(buffer, line, linesize);
898 buffer[linesize] = '\0';
899 rv = __gr_parse_entry(buffer, linesize, grp,
900 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
901 if (rv & NS_TERMINATE)
904 pos = ftello(st->fp);
906 if (st->fp != NULL && !stayopen) {
910 if (rv == NS_SUCCESS && retval != NULL)
911 *(struct group **)retval = grp;
912 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL)
913 fseeko(st->fp, pos, SEEK_SET);
923 dns_endstate(void *p)
931 dns_setgrent(void *retval, void *cb_data, va_list ap)
933 struct dns_state *st;
936 rv = dns_getstate(&st);
945 dns_group(void *retval, void *mdata, va_list ap)
947 char buf[HESIOD_NAME_MAX];
948 struct dns_state *st;
950 const char *name, *label;
953 size_t bufsize, adjsize, linesize;
955 enum nss_lookup_type how;
962 how = (enum nss_lookup_type)mdata;
965 name = va_arg(ap, const char *);
968 gid = va_arg(ap, gid_t);
973 grp = va_arg(ap, struct group *);
974 buffer = va_arg(ap, char *);
975 bufsize = va_arg(ap, size_t);
976 errnop = va_arg(ap, int *);
977 *errnop = dns_getstate(&st);
980 if (hesiod_init(&ctx) != 0) {
992 if (snprintf(buf, sizeof(buf), "%lu",
993 (unsigned long)gid) >= sizeof(buf))
1000 if (snprintf(buf, sizeof(buf), "group-%ld",
1001 st->counter++) >= sizeof(buf))
1006 hes = hesiod_resolve(ctx, label,
1007 how == nss_lt_id ? "gid" : "group");
1008 if ((how == nss_lt_id && hes == NULL &&
1009 (hes = hesiod_resolve(ctx, buf, "group")) == NULL) ||
1011 if (how == nss_lt_all)
1013 if (errno != ENOENT)
1017 rv = __gr_match_entry(hes[0], strlen(hes[0]), how, name, gid);
1018 if (rv != NS_SUCCESS) {
1019 hesiod_free_list(ctx, hes);
1023 /* We need room at least for the line, a string NUL
1024 * terminator, alignment padding, and one (char *)
1025 * pointer for the member list terminator.
1027 adjsize = bufsize - _ALIGNBYTES - sizeof(char *);
1028 linesize = strlcpy(buffer, hes[0], adjsize);
1029 if (linesize >= adjsize) {
1034 hesiod_free_list(ctx, hes);
1036 rv = __gr_parse_entry(buffer, linesize, grp,
1037 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
1038 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1041 hesiod_free_list(ctx, hes);
1044 if (rv == NS_SUCCESS && retval != NULL)
1045 *(struct group **)retval = grp;
1056 nis_endstate(void *p)
1061 free(((struct nis_state *)p)->key);
1067 nis_setgrent(void *retval, void *cb_data, va_list ap)
1069 struct nis_state *st;
1072 rv = nis_getstate(&st);
1074 return (NS_UNAVAIL);
1078 return (NS_UNAVAIL);
1083 nis_group(void *retval, void *mdata, va_list ap)
1086 struct nis_state *st;
1089 char *buffer, *key, *result;
1092 enum nss_lookup_type how;
1093 int *errnop, keylen, resultlen, rv;
1097 how = (enum nss_lookup_type)mdata;
1100 name = va_arg(ap, const char *);
1101 map = "group.byname";
1104 gid = va_arg(ap, gid_t);
1105 map = "group.bygid";
1108 map = "group.byname";
1111 grp = va_arg(ap, struct group *);
1112 buffer = va_arg(ap, char *);
1113 bufsize = va_arg(ap, size_t);
1114 errnop = va_arg(ap, int *);
1115 *errnop = nis_getstate(&st);
1117 return (NS_UNAVAIL);
1118 if (st->domain[0] == '\0') {
1119 if (getdomainname(st->domain, sizeof(st->domain)) != 0) {
1121 return (NS_UNAVAIL);
1129 if (strlcpy(buffer, name, bufsize) >= bufsize)
1133 if (snprintf(buffer, bufsize, "%lu",
1134 (unsigned long)gid) >= bufsize)
1143 if (how == nss_lt_all) {
1144 if (st->key == NULL)
1145 rv = yp_first(st->domain, map, &st->key,
1146 &st->keylen, &result, &resultlen);
1149 keylen = st->keylen;
1151 rv = yp_next(st->domain, map, key, keylen,
1152 &st->key, &st->keylen, &result,
1160 if (rv == YPERR_NOMORE) {
1168 rv = yp_match(st->domain, map, buffer, strlen(buffer),
1169 &result, &resultlen);
1170 if (rv == YPERR_KEY) {
1173 } else if (rv != 0) {
1179 /* We need room at least for the line, a string NUL
1180 * terminator, alignment padding, and one (char *)
1181 * pointer for the member list terminator.
1183 if (resultlen >= bufsize - _ALIGNBYTES - sizeof(char *)) {
1187 memcpy(buffer, result, resultlen);
1188 buffer[resultlen] = '\0';
1190 rv = __gr_match_entry(buffer, resultlen, how, name, gid);
1191 if (rv == NS_SUCCESS)
1192 rv = __gr_parse_entry(buffer, resultlen, grp,
1193 &buffer[resultlen+1], bufsize - resultlen - 1,
1195 } while (how == nss_lt_all && !(rv & NS_TERMINATE));
1197 if (rv == NS_SUCCESS && retval != NULL)
1198 *(struct group **)retval = grp;
1212 compat_endstate(void *p)
1214 struct compat_state *st;
1218 st = (struct compat_state *)p;
1227 compat_setgrent(void *retval, void *mdata, va_list ap)
1229 static const ns_src compatsrc[] = {
1231 { NSSRC_NIS, NS_SUCCESS },
1237 { NSSRC_DNS, dns_setgrent, NULL },
1240 { NSSRC_NIS, nis_setgrent, NULL },
1242 { NULL, NULL, NULL }
1244 struct compat_state *st;
1247 #define set_setent(x, y) do { \
1249 for (i = 0; i < (int)(nitems(x) - 1); i++) \
1250 x[i].mdata = (void *)y; \
1253 rv = compat_getstate(&st);
1255 return (NS_UNAVAIL);
1256 switch ((enum constants)mdata) {
1258 stayopen = va_arg(ap, int);
1262 st->fp = fopen(_PATH_GROUP, "re");
1263 set_setent(dtab, mdata);
1264 (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "setgrent",
1268 if (st->fp != NULL) {
1272 set_setent(dtab, mdata);
1273 (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "endgrent",
1279 st->compat = COMPAT_MODE_OFF;
1282 return (NS_UNAVAIL);
1288 compat_group(void *retval, void *mdata, va_list ap)
1290 static const ns_src compatsrc[] = {
1292 { NSSRC_NIS, NS_SUCCESS },
1298 { NSSRC_NIS, nis_group, NULL },
1301 { NSSRC_DNS, dns_group, NULL },
1303 { NULL, NULL, NULL }
1305 struct compat_state *st;
1306 enum nss_lookup_type how;
1307 const char *name, *line;
1312 size_t bufsize, linesize;
1314 int fresh, rv, stayopen, *errnop;
1316 #define set_lookup_type(x, y) do { \
1318 for (i = 0; i < (int)(nitems(x) - 1); i++) \
1319 x[i].mdata = (void *)y; \
1325 how = (enum nss_lookup_type)mdata;
1328 name = va_arg(ap, const char *);
1331 gid = va_arg(ap, gid_t);
1336 return (NS_NOTFOUND);
1338 grp = va_arg(ap, struct group *);
1339 buffer = va_arg(ap, char *);
1340 bufsize = va_arg(ap, size_t);
1341 errnop = va_arg(ap, int *);
1342 *errnop = compat_getstate(&st);
1344 return (NS_UNAVAIL);
1345 if (st->fp == NULL) {
1346 st->fp = fopen(_PATH_GROUP, "re");
1347 if (st->fp == NULL) {
1354 if (how == nss_lt_all)
1359 stayopen = st->stayopen;
1362 switch (st->compat) {
1363 case COMPAT_MODE_ALL:
1364 set_lookup_type(dtab, how);
1367 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1368 "getgrent_r", compatsrc, grp, buffer, bufsize,
1372 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1373 "getgrgid_r", compatsrc, gid, grp, buffer, bufsize,
1377 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1378 "getgrnam_r", compatsrc, name, grp, buffer,
1382 if (rv & NS_TERMINATE)
1384 st->compat = COMPAT_MODE_OFF;
1386 case COMPAT_MODE_NAME:
1387 set_lookup_type(dtab, nss_lt_name);
1388 rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT,
1389 "getgrnam_r", compatsrc, st->name, grp, buffer, bufsize,
1395 if (strcmp(name, grp->gr_name) != 0)
1399 if (gid != grp->gr_gid)
1413 st->compat = COMPAT_MODE_OFF;
1414 if (rv == NS_SUCCESS)
1422 pos = ftello(st->fp);
1423 while ((line = fgetln(st->fp, &linesize)) != NULL) {
1424 if (line[linesize-1] == '\n')
1426 if (linesize > 2 && line[0] == '+') {
1427 p = memchr(&line[1], ':', linesize);
1428 if (p == NULL || p == &line[1])
1429 st->compat = COMPAT_MODE_ALL;
1431 st->name = malloc(p - line);
1432 if (st->name == NULL) {
1434 "getgrent memory allocation failure");
1439 memcpy(st->name, &line[1], p - line - 1);
1440 st->name[p - line - 1] = '\0';
1441 st->compat = COMPAT_MODE_NAME;
1445 rv = __gr_match_entry(line, linesize, how, name, gid);
1446 if (rv != NS_SUCCESS)
1448 /* We need room at least for the line, a string NUL
1449 * terminator, alignment padding, and one (char *)
1450 * pointer for the member list terminator.
1452 if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) {
1457 memcpy(buffer, line, linesize);
1458 buffer[linesize] = '\0';
1459 rv = __gr_parse_entry(buffer, linesize, grp,
1460 &buffer[linesize + 1], bufsize - linesize - 1, errnop);
1461 if (rv & NS_TERMINATE)
1464 pos = ftello(st->fp);
1467 if (st->fp != NULL && !stayopen) {
1471 if (rv == NS_SUCCESS && retval != NULL)
1472 *(struct group **)retval = grp;
1473 else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL)
1474 fseeko(st->fp, pos, SEEK_SET);
1476 #undef set_lookup_type
1481 * common group line matching and parsing
1484 __gr_match_entry(const char *line, size_t linesize, enum nss_lookup_type how,
1485 const char *name, gid_t gid)
1488 const char *p, *eol;
1493 if (linesize == 0 || is_comment_line(line, linesize))
1494 return (NS_NOTFOUND);
1496 case nss_lt_name: needed = 1; break;
1497 case nss_lt_id: needed = 2; break;
1498 default: needed = 2; break;
1500 eol = &line[linesize];
1501 for (p = line, i = 0; i < needed && p < eol; p++)
1505 return (NS_NOTFOUND);
1508 namesize = strlen(name);
1509 if (namesize + 1 == (size_t)(p - line) &&
1510 memcmp(line, name, namesize) == 0)
1511 return (NS_SUCCESS);
1514 n = strtoul(p, &q, 10);
1515 if (q < eol && *q == ':' && gid == (gid_t)n)
1516 return (NS_SUCCESS);
1519 return (NS_SUCCESS);
1523 return (NS_NOTFOUND);
1528 __gr_parse_entry(char *line, size_t linesize, struct group *grp, char *membuf,
1529 size_t membufsize, int *errnop)
1531 char *s_gid, *s_mem, *p, **members;
1535 memset(grp, 0, sizeof(*grp));
1536 members = (char **)_ALIGN(membuf);
1537 membufsize -= (char *)members - membuf;
1538 maxmembers = membufsize / sizeof(*members);
1539 if (maxmembers <= 0 ||
1540 (grp->gr_name = strsep(&line, ":")) == NULL ||
1541 grp->gr_name[0] == '\0' ||
1542 (grp->gr_passwd = strsep(&line, ":")) == NULL ||
1543 (s_gid = strsep(&line, ":")) == NULL ||
1545 return (NS_NOTFOUND);
1547 n = strtoul(s_gid, &s_gid, 10);
1548 if (s_gid[0] != '\0')
1549 return (NS_NOTFOUND);
1550 grp->gr_gid = (gid_t)n;
1551 grp->gr_mem = members;
1552 while (maxmembers > 1 && s_mem != NULL) {
1553 p = strsep(&s_mem, ",");
1554 if (p != NULL && *p != '\0') {
1561 return (NS_SUCCESS);