diff options
Diffstat (limited to 'lib/libc/gen/getgrent.c')
| -rw-r--r-- | lib/libc/gen/getgrent.c | 1554 |
1 files changed, 0 insertions, 1554 deletions
diff --git a/lib/libc/gen/getgrent.c b/lib/libc/gen/getgrent.c deleted file mode 100644 index 18f64a8..0000000 --- a/lib/libc/gen/getgrent.c +++ /dev/null @@ -1,1554 +0,0 @@ -/*- - * Copyright (c) 2003 Networks Associates Technology, Inc. - * All rights reserved. - * - * This software was developed for the FreeBSD Project by - * Jacques A. Vidrine, Safeport Network Services, and Network - * Associates Laboratories, the Security Research Division of Network - * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 - * ("CBOSS"), as part of the DARPA CHATS research program. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "namespace.h" -#include <sys/param.h> -#ifdef YP -#include <rpc/rpc.h> -#include <rpcsvc/yp_prot.h> -#include <rpcsvc/ypclnt.h> -#endif -#include <assert.h> -#include <ctype.h> -#include <errno.h> -#ifdef HESIOD -#include <hesiod.h> -#endif -#include <grp.h> -#include <nsswitch.h> -#include <pthread.h> -#include <pthread_np.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <syslog.h> -#include <unistd.h> -#include "un-namespace.h" -#include "libc_private.h" -#include "nss_tls.h" -#ifdef NS_CACHING -#include "nscache.h" -#endif - -enum constants { - GRP_STORAGE_INITIAL = 1 << 10, /* 1 KByte */ - GRP_STORAGE_MAX = 1 << 20, /* 1 MByte */ - SETGRENT = 1, - ENDGRENT = 2, - HESIOD_NAME_MAX = 256, -}; - -static const ns_src defaultsrc[] = { - { NSSRC_COMPAT, NS_SUCCESS }, - { NULL, 0 } -}; - -int __gr_match_entry(const char *, size_t, enum nss_lookup_type, - const char *, gid_t); -int __gr_parse_entry(char *, size_t, struct group *, char *, size_t, - int *); - -static int is_comment_line(const char *, size_t); - -union key { - const char *name; - gid_t gid; -}; -static struct group *getgr(int (*)(union key, struct group *, char *, size_t, - struct group **), union key); -static int wrap_getgrnam_r(union key, struct group *, char *, size_t, - struct group **); -static int wrap_getgrgid_r(union key, struct group *, char *, size_t, - struct group **); -static int wrap_getgrent_r(union key, struct group *, char *, size_t, - struct group **); - -struct files_state { - FILE *fp; - int stayopen; -}; -static void files_endstate(void *); -NSS_TLS_HANDLING(files); -static int files_setgrent(void *, void *, va_list); -static int files_group(void *, void *, va_list); - - -#ifdef HESIOD -struct dns_state { - long counter; -}; -static void dns_endstate(void *); -NSS_TLS_HANDLING(dns); -static int dns_setgrent(void *, void *, va_list); -static int dns_group(void *, void *, va_list); -#endif - - -#ifdef YP -struct nis_state { - char domain[MAXHOSTNAMELEN]; - int done; - char *key; - int keylen; -}; -static void nis_endstate(void *); -NSS_TLS_HANDLING(nis); -static int nis_setgrent(void *, void *, va_list); -static int nis_group(void *, void *, va_list); -#endif - -struct compat_state { - FILE *fp; - int stayopen; - char *name; - enum _compat { - COMPAT_MODE_OFF = 0, - COMPAT_MODE_ALL, - COMPAT_MODE_NAME - } compat; -}; -static void compat_endstate(void *); -NSS_TLS_HANDLING(compat); -static int compat_setgrent(void *, void *, va_list); -static int compat_group(void *, void *, va_list); - -static int gr_addgid(gid_t, gid_t *, int, int *); -static int getgroupmembership_fallback(void *, void *, va_list); - -#ifdef NS_CACHING -static int grp_id_func(char *, size_t *, va_list, void *); -static int grp_marshal_func(char *, size_t *, void *, va_list, void *); -static int grp_unmarshal_func(char *, size_t, void *, va_list, void *); - -static int -grp_id_func(char *buffer, size_t *buffer_size, va_list ap, void *cache_mdata) -{ - char *name; - gid_t gid; - - size_t desired_size, size; - int res = NS_UNAVAIL; - enum nss_lookup_type lookup_type; - - - lookup_type = (enum nss_lookup_type)cache_mdata; - switch (lookup_type) { - case nss_lt_name: - name = va_arg(ap, char *); - size = strlen(name); - desired_size = sizeof(enum nss_lookup_type) + size + 1; - if (desired_size > *buffer_size) { - res = NS_RETURN; - goto fin; - } - - memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type)); - memcpy(buffer + sizeof(enum nss_lookup_type), name, size + 1); - - res = NS_SUCCESS; - break; - case nss_lt_id: - gid = va_arg(ap, gid_t); - desired_size = sizeof(enum nss_lookup_type) + sizeof(gid_t); - if (desired_size > *buffer_size) { - res = NS_RETURN; - goto fin; - } - - memcpy(buffer, &lookup_type, sizeof(enum nss_lookup_type)); - memcpy(buffer + sizeof(enum nss_lookup_type), &gid, - sizeof(gid_t)); - - res = NS_SUCCESS; - break; - default: - /* should be unreachable */ - return (NS_UNAVAIL); - } - -fin: - *buffer_size = desired_size; - return (res); -} - -static int -grp_marshal_func(char *buffer, size_t *buffer_size, void *retval, va_list ap, - void *cache_mdata) -{ - char *name; - gid_t gid; - struct group *grp; - char *orig_buf; - size_t orig_buf_size; - - struct group new_grp; - size_t desired_size, size, mem_size; - char *p, **mem; - - switch ((enum nss_lookup_type)cache_mdata) { - case nss_lt_name: - name = va_arg(ap, char *); - break; - case nss_lt_id: - gid = va_arg(ap, gid_t); - break; - case nss_lt_all: - break; - default: - /* should be unreachable */ - return (NS_UNAVAIL); - } - - grp = va_arg(ap, struct group *); - orig_buf = va_arg(ap, char *); - orig_buf_size = va_arg(ap, size_t); - - desired_size = _ALIGNBYTES + sizeof(struct group) + sizeof(char *); - - if (grp->gr_name != NULL) - desired_size += strlen(grp->gr_name) + 1; - if (grp->gr_passwd != NULL) - desired_size += strlen(grp->gr_passwd) + 1; - - if (grp->gr_mem != NULL) { - mem_size = 0; - for (mem = grp->gr_mem; *mem; ++mem) { - desired_size += strlen(*mem) + 1; - ++mem_size; - } - - desired_size += _ALIGNBYTES + (mem_size + 1) * sizeof(char *); - } - - if (desired_size > *buffer_size) { - /* this assignment is here for future use */ - *buffer_size = desired_size; - return (NS_RETURN); - } - - memcpy(&new_grp, grp, sizeof(struct group)); - memset(buffer, 0, desired_size); - - *buffer_size = desired_size; - p = buffer + sizeof(struct group) + sizeof(char *); - memcpy(buffer + sizeof(struct group), &p, sizeof(char *)); - p = (char *)_ALIGN(p); - - if (new_grp.gr_name != NULL) { - size = strlen(new_grp.gr_name); - memcpy(p, new_grp.gr_name, size); - new_grp.gr_name = p; - p += size + 1; - } - - if (new_grp.gr_passwd != NULL) { - size = strlen(new_grp.gr_passwd); - memcpy(p, new_grp.gr_passwd, size); - new_grp.gr_passwd = p; - p += size + 1; - } - - if (new_grp.gr_mem != NULL) { - p = (char *)_ALIGN(p); - memcpy(p, new_grp.gr_mem, sizeof(char *) * mem_size); - new_grp.gr_mem = (char **)p; - p += sizeof(char *) * (mem_size + 1); - - for (mem = new_grp.gr_mem; *mem; ++mem) { - size = strlen(*mem); - memcpy(p, *mem, size); - *mem = p; - p += size + 1; - } - } - - memcpy(buffer, &new_grp, sizeof(struct group)); - return (NS_SUCCESS); -} - -static int -grp_unmarshal_func(char *buffer, size_t buffer_size, void *retval, va_list ap, - void *cache_mdata) -{ - char *name; - gid_t gid; - struct group *grp; - char *orig_buf; - size_t orig_buf_size; - int *ret_errno; - - char *p; - char **mem; - - switch ((enum nss_lookup_type)cache_mdata) { - case nss_lt_name: - name = va_arg(ap, char *); - break; - case nss_lt_id: - gid = va_arg(ap, gid_t); - break; - case nss_lt_all: - break; - default: - /* should be unreachable */ - return (NS_UNAVAIL); - } - - grp = va_arg(ap, struct group *); - orig_buf = va_arg(ap, char *); - orig_buf_size = va_arg(ap, size_t); - ret_errno = va_arg(ap, int *); - - if (orig_buf_size < - buffer_size - sizeof(struct group) - sizeof(char *)) { - *ret_errno = ERANGE; - return (NS_RETURN); - } - - memcpy(grp, buffer, sizeof(struct group)); - memcpy(&p, buffer + sizeof(struct group), sizeof(char *)); - - orig_buf = (char *)_ALIGN(orig_buf); - memcpy(orig_buf, buffer + sizeof(struct group) + sizeof(char *) + - _ALIGN(p) - (size_t)p, - buffer_size - sizeof(struct group) - sizeof(char *) - - _ALIGN(p) + (size_t)p); - p = (char *)_ALIGN(p); - - NS_APPLY_OFFSET(grp->gr_name, orig_buf, p, char *); - NS_APPLY_OFFSET(grp->gr_passwd, orig_buf, p, char *); - if (grp->gr_mem != NULL) { - NS_APPLY_OFFSET(grp->gr_mem, orig_buf, p, char **); - - for (mem = grp->gr_mem; *mem; ++mem) - NS_APPLY_OFFSET(*mem, orig_buf, p, char *); - } - - if (retval != NULL) - *((struct group **)retval) = grp; - - return (NS_SUCCESS); -} - -NSS_MP_CACHE_HANDLING(group); -#endif /* NS_CACHING */ - -#ifdef NS_CACHING -static const nss_cache_info setgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER( - group, (void *)nss_lt_all, - NULL, NULL); -#endif - -static const ns_dtab setgrent_dtab[] = { - { NSSRC_FILES, files_setgrent, (void *)SETGRENT }, -#ifdef HESIOD - { NSSRC_DNS, dns_setgrent, (void *)SETGRENT }, -#endif -#ifdef YP - { NSSRC_NIS, nis_setgrent, (void *)SETGRENT }, -#endif - { NSSRC_COMPAT, compat_setgrent, (void *)SETGRENT }, -#ifdef NS_CACHING - NS_CACHE_CB(&setgrent_cache_info) -#endif - { NULL, NULL, NULL } -}; - -#ifdef NS_CACHING -static const nss_cache_info endgrent_cache_info = NS_MP_CACHE_INFO_INITIALIZER( - group, (void *)nss_lt_all, - NULL, NULL); -#endif - -static const ns_dtab endgrent_dtab[] = { - { NSSRC_FILES, files_setgrent, (void *)ENDGRENT }, -#ifdef HESIOD - { NSSRC_DNS, dns_setgrent, (void *)ENDGRENT }, -#endif -#ifdef YP - { NSSRC_NIS, nis_setgrent, (void *)ENDGRENT }, -#endif - { NSSRC_COMPAT, compat_setgrent, (void *)ENDGRENT }, -#ifdef NS_CACHING - NS_CACHE_CB(&endgrent_cache_info) -#endif - { NULL, NULL, NULL } -}; - -#ifdef NS_CACHING -static const nss_cache_info getgrent_r_cache_info = NS_MP_CACHE_INFO_INITIALIZER( - group, (void *)nss_lt_all, - grp_marshal_func, grp_unmarshal_func); -#endif - -static const ns_dtab getgrent_r_dtab[] = { - { NSSRC_FILES, files_group, (void *)nss_lt_all }, -#ifdef HESIOD - { NSSRC_DNS, dns_group, (void *)nss_lt_all }, -#endif -#ifdef YP - { NSSRC_NIS, nis_group, (void *)nss_lt_all }, -#endif - { NSSRC_COMPAT, compat_group, (void *)nss_lt_all }, -#ifdef NS_CACHING - NS_CACHE_CB(&getgrent_r_cache_info) -#endif - { NULL, NULL, NULL } -}; - -static int -gr_addgid(gid_t gid, gid_t *groups, int maxgrp, int *grpcnt) -{ - int ret, dupc; - - for (dupc = 0; dupc < MIN(maxgrp, *grpcnt); dupc++) { - if (groups[dupc] == gid) - return 1; - } - - ret = 1; - if (*grpcnt < maxgrp) - groups[*grpcnt] = gid; - else - ret = 0; - - (*grpcnt)++; - - return ret; -} - -static int -getgroupmembership_fallback(void *retval, void *mdata, va_list ap) -{ - const ns_src src[] = { - { mdata, NS_SUCCESS }, - { NULL, 0} - }; - struct group grp; - struct group *grp_p; - char *buf; - size_t bufsize; - const char *uname; - gid_t *groups; - gid_t agroup; - int maxgrp, *grpcnt; - int i, rv, ret_errno; - - /* - * As this is a fallback method, only provided src - * list will be respected during methods search. - */ - assert(src[0].name != NULL); - - uname = va_arg(ap, const char *); - agroup = va_arg(ap, gid_t); - groups = va_arg(ap, gid_t *); - maxgrp = va_arg(ap, int); - grpcnt = va_arg(ap, int *); - - rv = NS_UNAVAIL; - - buf = malloc(GRP_STORAGE_INITIAL); - if (buf == NULL) - goto out; - - bufsize = GRP_STORAGE_INITIAL; - - gr_addgid(agroup, groups, maxgrp, grpcnt); - - _nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", src, 0); - for (;;) { - do { - ret_errno = 0; - grp_p = NULL; - rv = _nsdispatch(&grp_p, getgrent_r_dtab, NSDB_GROUP, - "getgrent_r", src, &grp, buf, bufsize, &ret_errno); - - if (grp_p == NULL && ret_errno == ERANGE) { - free(buf); - if ((bufsize << 1) > GRP_STORAGE_MAX) { - buf = NULL; - errno = ERANGE; - goto out; - } - - bufsize <<= 1; - buf = malloc(bufsize); - if (buf == NULL) { - goto out; - } - } - } while (grp_p == NULL && ret_errno == ERANGE); - - if (ret_errno != 0) { - errno = ret_errno; - goto out; - } - - if (grp_p == NULL) - break; - - for (i = 0; grp.gr_mem[i]; i++) { - if (strcmp(grp.gr_mem[i], uname) == 0) - gr_addgid(grp.gr_gid, groups, maxgrp, grpcnt); - } - } - - _nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", src); -out: - free(buf); - return (rv); -} - -/* XXX IEEE Std 1003.1, 2003 specifies `void setgrent(void)' */ -int -setgrent(void) -{ - (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc, 0); - return (1); -} - - -int -setgroupent(int stayopen) -{ - (void)_nsdispatch(NULL, setgrent_dtab, NSDB_GROUP, "setgrent", defaultsrc, - stayopen); - return (1); -} - - -void -endgrent(void) -{ - (void)_nsdispatch(NULL, endgrent_dtab, NSDB_GROUP, "endgrent", defaultsrc); -} - - -int -getgrent_r(struct group *grp, char *buffer, size_t bufsize, - struct group **result) -{ - int rv, ret_errno; - - ret_errno = 0; - *result = NULL; - rv = _nsdispatch(result, getgrent_r_dtab, NSDB_GROUP, "getgrent_r", defaultsrc, - grp, buffer, bufsize, &ret_errno); - if (rv == NS_SUCCESS) - return (0); - else - return (ret_errno); -} - - -int -getgrnam_r(const char *name, struct group *grp, char *buffer, size_t bufsize, - struct group **result) -{ -#ifdef NS_CACHING - static const nss_cache_info cache_info = - NS_COMMON_CACHE_INFO_INITIALIZER( - group, (void *)nss_lt_name, - grp_id_func, grp_marshal_func, grp_unmarshal_func); -#endif - - static const ns_dtab dtab[] = { - { NSSRC_FILES, files_group, (void *)nss_lt_name }, -#ifdef HESIOD - { NSSRC_DNS, dns_group, (void *)nss_lt_name }, -#endif -#ifdef YP - { NSSRC_NIS, nis_group, (void *)nss_lt_name }, -#endif - { NSSRC_COMPAT, compat_group, (void *)nss_lt_name }, -#ifdef NS_CACHING - NS_CACHE_CB(&cache_info) -#endif - { NULL, NULL, NULL } - }; - int rv, ret_errno; - - ret_errno = 0; - *result = NULL; - rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrnam_r", defaultsrc, - name, grp, buffer, bufsize, &ret_errno); - if (rv == NS_SUCCESS) - return (0); - else - return (ret_errno); -} - - -int -getgrgid_r(gid_t gid, struct group *grp, char *buffer, size_t bufsize, - struct group **result) -{ -#ifdef NS_CACHING - static const nss_cache_info cache_info = - NS_COMMON_CACHE_INFO_INITIALIZER( - group, (void *)nss_lt_id, - grp_id_func, grp_marshal_func, grp_unmarshal_func); -#endif - - static const ns_dtab dtab[] = { - { NSSRC_FILES, files_group, (void *)nss_lt_id }, -#ifdef HESIOD - { NSSRC_DNS, dns_group, (void *)nss_lt_id }, -#endif -#ifdef YP - { NSSRC_NIS, nis_group, (void *)nss_lt_id }, -#endif - { NSSRC_COMPAT, compat_group, (void *)nss_lt_id }, -#ifdef NS_CACHING - NS_CACHE_CB(&cache_info) -#endif - { NULL, NULL, NULL } - }; - int rv, ret_errno; - - ret_errno = 0; - *result = NULL; - rv = _nsdispatch(result, dtab, NSDB_GROUP, "getgrgid_r", defaultsrc, - gid, grp, buffer, bufsize, &ret_errno); - if (rv == NS_SUCCESS) - return (0); - else - return (ret_errno); -} - - - -int -__getgroupmembership(const char *uname, gid_t agroup, gid_t *groups, - int maxgrp, int *grpcnt) -{ - static const ns_dtab dtab[] = { - NS_FALLBACK_CB(getgroupmembership_fallback) - { NULL, NULL, NULL } - }; - int rv; - - assert(uname != NULL); - /* groups may be NULL if just sizing when invoked with maxgrp = 0 */ - assert(grpcnt != NULL); - - *grpcnt = 0; - rv = _nsdispatch(NULL, dtab, NSDB_GROUP, "getgroupmembership", - defaultsrc, uname, agroup, groups, maxgrp, grpcnt); - - /* too many groups found? */ - return (*grpcnt > maxgrp ? -1 : 0); -} - - -static struct group grp; -static char *grp_storage; -static size_t grp_storage_size; - -static struct group * -getgr(int (*fn)(union key, struct group *, char *, size_t, struct group **), - union key key) -{ - int rv; - struct group *res; - - if (grp_storage == NULL) { - grp_storage = malloc(GRP_STORAGE_INITIAL); - if (grp_storage == NULL) - return (NULL); - grp_storage_size = GRP_STORAGE_INITIAL; - } - do { - rv = fn(key, &grp, grp_storage, grp_storage_size, &res); - if (res == NULL && rv == ERANGE) { - free(grp_storage); - if ((grp_storage_size << 1) > GRP_STORAGE_MAX) { - grp_storage = NULL; - errno = ERANGE; - return (NULL); - } - grp_storage_size <<= 1; - grp_storage = malloc(grp_storage_size); - if (grp_storage == NULL) - return (NULL); - } - } while (res == NULL && rv == ERANGE); - if (rv != 0) - errno = rv; - return (res); -} - - -static int -wrap_getgrnam_r(union key key, struct group *grp, char *buffer, size_t bufsize, - struct group **res) -{ - return (getgrnam_r(key.name, grp, buffer, bufsize, res)); -} - - -static int -wrap_getgrgid_r(union key key, struct group *grp, char *buffer, size_t bufsize, - struct group **res) -{ - return (getgrgid_r(key.gid, grp, buffer, bufsize, res)); -} - - -static int -wrap_getgrent_r(union key key __unused, struct group *grp, char *buffer, - size_t bufsize, struct group **res) -{ - return (getgrent_r(grp, buffer, bufsize, res)); -} - - -struct group * -getgrnam(const char *name) -{ - union key key; - - key.name = name; - return (getgr(wrap_getgrnam_r, key)); -} - - -struct group * -getgrgid(gid_t gid) -{ - union key key; - - key.gid = gid; - return (getgr(wrap_getgrgid_r, key)); -} - - -struct group * -getgrent(void) -{ - union key key; - - key.gid = 0; /* not used */ - return (getgr(wrap_getgrent_r, key)); -} - - -static int -is_comment_line(const char *s, size_t n) -{ - const char *eom; - - eom = &s[n]; - - for (; s < eom; s++) - if (*s == '#' || !isspace((unsigned char)*s)) - break; - return (*s == '#' || s == eom); -} - - -/* - * files backend - */ -static void -files_endstate(void *p) -{ - - if (p == NULL) - return; - if (((struct files_state *)p)->fp != NULL) - fclose(((struct files_state *)p)->fp); - free(p); -} - - -static int -files_setgrent(void *retval, void *mdata, va_list ap) -{ - struct files_state *st; - int rv, stayopen; - - rv = files_getstate(&st); - if (rv != 0) - return (NS_UNAVAIL); - switch ((enum constants)mdata) { - case SETGRENT: - stayopen = va_arg(ap, int); - if (st->fp != NULL) - rewind(st->fp); - else if (stayopen) - st->fp = fopen(_PATH_GROUP, "r"); - break; - case ENDGRENT: - if (st->fp != NULL) { - fclose(st->fp); - st->fp = NULL; - } - break; - default: - break; - } - return (NS_UNAVAIL); -} - - -static int -files_group(void *retval, void *mdata, va_list ap) -{ - struct files_state *st; - enum nss_lookup_type how; - const char *name, *line; - struct group *grp; - gid_t gid; - char *buffer; - size_t bufsize, linesize; - off_t pos; - int rv, stayopen, *errnop; - - name = NULL; - gid = (gid_t)-1; - how = (enum nss_lookup_type)mdata; - switch (how) { - case nss_lt_name: - name = va_arg(ap, const char *); - break; - case nss_lt_id: - gid = va_arg(ap, gid_t); - break; - case nss_lt_all: - break; - default: - return (NS_NOTFOUND); - } - grp = va_arg(ap, struct group *); - buffer = va_arg(ap, char *); - bufsize = va_arg(ap, size_t); - errnop = va_arg(ap, int *); - *errnop = files_getstate(&st); - if (*errnop != 0) - return (NS_UNAVAIL); - if (st->fp == NULL && - ((st->fp = fopen(_PATH_GROUP, "r")) == NULL)) { - *errnop = errno; - return (NS_UNAVAIL); - } - if (how == nss_lt_all) - stayopen = 1; - else { - rewind(st->fp); - stayopen = st->stayopen; - } - rv = NS_NOTFOUND; - pos = ftello(st->fp); - while ((line = fgetln(st->fp, &linesize)) != NULL) { - if (line[linesize-1] == '\n') - linesize--; - rv = __gr_match_entry(line, linesize, how, name, gid); - if (rv != NS_SUCCESS) - continue; - /* We need room at least for the line, a string NUL - * terminator, alignment padding, and one (char *) - * pointer for the member list terminator. - */ - if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) { - *errnop = ERANGE; - rv = NS_RETURN; - break; - } - memcpy(buffer, line, linesize); - buffer[linesize] = '\0'; - rv = __gr_parse_entry(buffer, linesize, grp, - &buffer[linesize + 1], bufsize - linesize - 1, errnop); - if (rv & NS_TERMINATE) - break; - pos = ftello(st->fp); - } - if (!stayopen && st->fp != NULL) { - fclose(st->fp); - st->fp = NULL; - } - if (rv == NS_SUCCESS && retval != NULL) - *(struct group **)retval = grp; - else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL) - fseeko(st->fp, pos, SEEK_SET); - return (rv); -} - - -#ifdef HESIOD -/* - * dns backend - */ -static void -dns_endstate(void *p) -{ - - free(p); -} - - -static int -dns_setgrent(void *retval, void *cb_data, va_list ap) -{ - struct dns_state *st; - int rv; - - rv = dns_getstate(&st); - if (rv != 0) - return (NS_UNAVAIL); - st->counter = 0; - return (NS_UNAVAIL); -} - - -static int -dns_group(void *retval, void *mdata, va_list ap) -{ - char buf[HESIOD_NAME_MAX]; - struct dns_state *st; - struct group *grp; - const char *name, *label; - void *ctx; - char *buffer, **hes; - size_t bufsize, adjsize, linesize; - gid_t gid; - enum nss_lookup_type how; - int rv, *errnop; - - ctx = NULL; - hes = NULL; - name = NULL; - gid = (gid_t)-1; - how = (enum nss_lookup_type)mdata; - switch (how) { - case nss_lt_name: - name = va_arg(ap, const char *); - break; - case nss_lt_id: - gid = va_arg(ap, gid_t); - break; - case nss_lt_all: - break; - } - grp = va_arg(ap, struct group *); - buffer = va_arg(ap, char *); - bufsize = va_arg(ap, size_t); - errnop = va_arg(ap, int *); - *errnop = dns_getstate(&st); - if (*errnop != 0) - return (NS_UNAVAIL); - if (hesiod_init(&ctx) != 0) { - *errnop = errno; - rv = NS_UNAVAIL; - goto fin; - } - do { - rv = NS_NOTFOUND; - switch (how) { - case nss_lt_name: - label = name; - break; - case nss_lt_id: - if (snprintf(buf, sizeof(buf), "%lu", - (unsigned long)gid) >= sizeof(buf)) - goto fin; - label = buf; - break; - case nss_lt_all: - if (st->counter < 0) - goto fin; - if (snprintf(buf, sizeof(buf), "group-%ld", - st->counter++) >= sizeof(buf)) - goto fin; - label = buf; - break; - } - hes = hesiod_resolve(ctx, label, - how == nss_lt_id ? "gid" : "group"); - if ((how == nss_lt_id && hes == NULL && - (hes = hesiod_resolve(ctx, buf, "group")) == NULL) || - hes == NULL) { - if (how == nss_lt_all) - st->counter = -1; - if (errno != ENOENT) - *errnop = errno; - goto fin; - } - rv = __gr_match_entry(hes[0], strlen(hes[0]), how, name, gid); - if (rv != NS_SUCCESS) { - hesiod_free_list(ctx, hes); - hes = NULL; - continue; - } - /* We need room at least for the line, a string NUL - * terminator, alignment padding, and one (char *) - * pointer for the member list terminator. - */ - adjsize = bufsize - _ALIGNBYTES - sizeof(char *); - linesize = strlcpy(buffer, hes[0], adjsize); - if (linesize >= adjsize) { - *errnop = ERANGE; - rv = NS_RETURN; - goto fin; - } - hesiod_free_list(ctx, hes); - hes = NULL; - rv = __gr_parse_entry(buffer, linesize, grp, - &buffer[linesize + 1], bufsize - linesize - 1, errnop); - } while (how == nss_lt_all && !(rv & NS_TERMINATE)); -fin: - if (hes != NULL) - hesiod_free_list(ctx, hes); - if (ctx != NULL) - hesiod_end(ctx); - if (rv == NS_SUCCESS && retval != NULL) - *(struct group **)retval = grp; - return (rv); -} -#endif /* HESIOD */ - - -#ifdef YP -/* - * nis backend - */ -static void -nis_endstate(void *p) -{ - - if (p == NULL) - return; - free(((struct nis_state *)p)->key); - free(p); -} - - -static int -nis_setgrent(void *retval, void *cb_data, va_list ap) -{ - struct nis_state *st; - int rv; - - rv = nis_getstate(&st); - if (rv != 0) - return (NS_UNAVAIL); - st->done = 0; - free(st->key); - st->key = NULL; - return (NS_UNAVAIL); -} - - -static int -nis_group(void *retval, void *mdata, va_list ap) -{ - char *map; - struct nis_state *st; - struct group *grp; - const char *name; - char *buffer, *key, *result; - size_t bufsize; - gid_t gid; - enum nss_lookup_type how; - int *errnop, keylen, resultlen, rv; - - name = NULL; - gid = (gid_t)-1; - how = (enum nss_lookup_type)mdata; - switch (how) { - case nss_lt_name: - name = va_arg(ap, const char *); - map = "group.byname"; - break; - case nss_lt_id: - gid = va_arg(ap, gid_t); - map = "group.bygid"; - break; - case nss_lt_all: - map = "group.byname"; - break; - } - grp = va_arg(ap, struct group *); - buffer = va_arg(ap, char *); - bufsize = va_arg(ap, size_t); - errnop = va_arg(ap, int *); - *errnop = nis_getstate(&st); - if (*errnop != 0) - return (NS_UNAVAIL); - if (st->domain[0] == '\0') { - if (getdomainname(st->domain, sizeof(st->domain)) != 0) { - *errnop = errno; - return (NS_UNAVAIL); - } - } - result = NULL; - do { - rv = NS_NOTFOUND; - switch (how) { - case nss_lt_name: - if (strlcpy(buffer, name, bufsize) >= bufsize) - goto erange; - break; - case nss_lt_id: - if (snprintf(buffer, bufsize, "%lu", - (unsigned long)gid) >= bufsize) - goto erange; - break; - case nss_lt_all: - if (st->done) - goto fin; - break; - } - result = NULL; - if (how == nss_lt_all) { - if (st->key == NULL) - rv = yp_first(st->domain, map, &st->key, - &st->keylen, &result, &resultlen); - else { - key = st->key; - keylen = st->keylen; - st->key = NULL; - rv = yp_next(st->domain, map, key, keylen, - &st->key, &st->keylen, &result, - &resultlen); - free(key); - } - if (rv != 0) { - free(result); - free(st->key); - st->key = NULL; - if (rv == YPERR_NOMORE) { - st->done = 1; - rv = NS_NOTFOUND; - } else - rv = NS_UNAVAIL; - goto fin; - } - } else { - rv = yp_match(st->domain, map, buffer, strlen(buffer), - &result, &resultlen); - if (rv == YPERR_KEY) { - rv = NS_NOTFOUND; - continue; - } else if (rv != 0) { - free(result); - rv = NS_UNAVAIL; - continue; - } - } - /* We need room at least for the line, a string NUL - * terminator, alignment padding, and one (char *) - * pointer for the member list terminator. - */ - if (resultlen >= bufsize - _ALIGNBYTES - sizeof(char *)) - goto erange; - memcpy(buffer, result, resultlen); - buffer[resultlen] = '\0'; - free(result); - rv = __gr_match_entry(buffer, resultlen, how, name, gid); - if (rv == NS_SUCCESS) - rv = __gr_parse_entry(buffer, resultlen, grp, - &buffer[resultlen+1], bufsize - resultlen - 1, - errnop); - } while (how == nss_lt_all && !(rv & NS_TERMINATE)); -fin: - if (rv == NS_SUCCESS && retval != NULL) - *(struct group **)retval = grp; - return (rv); -erange: - *errnop = ERANGE; - return (NS_RETURN); -} -#endif /* YP */ - - - -/* - * compat backend - */ -static void -compat_endstate(void *p) -{ - struct compat_state *st; - - if (p == NULL) - return; - st = (struct compat_state *)p; - free(st->name); - if (st->fp != NULL) - fclose(st->fp); - free(p); -} - - -static int -compat_setgrent(void *retval, void *mdata, va_list ap) -{ - static const ns_src compatsrc[] = { -#ifdef YP - { NSSRC_NIS, NS_SUCCESS }, -#endif - { NULL, 0 } - }; - ns_dtab dtab[] = { -#ifdef HESIOD - { NSSRC_DNS, dns_setgrent, NULL }, -#endif -#ifdef YP - { NSSRC_NIS, nis_setgrent, NULL }, -#endif - { NULL, NULL, NULL } - }; - struct compat_state *st; - int rv, stayopen; - -#define set_setent(x, y) do { \ - int i; \ - \ - for (i = 0; i < (sizeof(x)/sizeof(x[0])) - 1; i++) \ - x[i].mdata = (void *)y; \ -} while (0) - - rv = compat_getstate(&st); - if (rv != 0) - return (NS_UNAVAIL); - switch ((enum constants)mdata) { - case SETGRENT: - stayopen = va_arg(ap, int); - if (st->fp != NULL) - rewind(st->fp); - else if (stayopen) - st->fp = fopen(_PATH_GROUP, "r"); - set_setent(dtab, mdata); - (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "setgrent", - compatsrc, 0); - break; - case ENDGRENT: - if (st->fp != NULL) { - fclose(st->fp); - st->fp = NULL; - } - set_setent(dtab, mdata); - (void)_nsdispatch(NULL, dtab, NSDB_GROUP_COMPAT, "endgrent", - compatsrc, 0); - break; - default: - break; - } - st->compat = COMPAT_MODE_OFF; - free(st->name); - st->name = NULL; - return (NS_UNAVAIL); -#undef set_setent -} - - -static int -compat_group(void *retval, void *mdata, va_list ap) -{ - static const ns_src compatsrc[] = { -#ifdef YP - { NSSRC_NIS, NS_SUCCESS }, -#endif - { NULL, 0 } - }; - ns_dtab dtab[] = { -#ifdef YP - { NSSRC_NIS, nis_group, NULL }, -#endif -#ifdef HESIOD - { NSSRC_DNS, dns_group, NULL }, -#endif - { NULL, NULL, NULL } - }; - struct compat_state *st; - enum nss_lookup_type how; - const char *name, *line; - struct group *grp; - gid_t gid; - char *buffer, *p; - void *discard; - size_t bufsize, linesize; - off_t pos; - int rv, stayopen, *errnop; - -#define set_lookup_type(x, y) do { \ - int i; \ - \ - for (i = 0; i < (sizeof(x)/sizeof(x[0])) - 1; i++) \ - x[i].mdata = (void *)y; \ -} while (0) - - name = NULL; - gid = (gid_t)-1; - how = (enum nss_lookup_type)mdata; - switch (how) { - case nss_lt_name: - name = va_arg(ap, const char *); - break; - case nss_lt_id: - gid = va_arg(ap, gid_t); - break; - case nss_lt_all: - break; - default: - return (NS_NOTFOUND); - } - grp = va_arg(ap, struct group *); - buffer = va_arg(ap, char *); - bufsize = va_arg(ap, size_t); - errnop = va_arg(ap, int *); - *errnop = compat_getstate(&st); - if (*errnop != 0) - return (NS_UNAVAIL); - if (st->fp == NULL && - ((st->fp = fopen(_PATH_GROUP, "r")) == NULL)) { - *errnop = errno; - rv = NS_UNAVAIL; - goto fin; - } - if (how == nss_lt_all) - stayopen = 1; - else { - rewind(st->fp); - stayopen = st->stayopen; - } -docompat: - switch (st->compat) { - case COMPAT_MODE_ALL: - set_lookup_type(dtab, how); - switch (how) { - case nss_lt_all: - rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT, - "getgrent_r", compatsrc, grp, buffer, bufsize, - errnop); - break; - case nss_lt_id: - rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT, - "getgrgid_r", compatsrc, gid, grp, buffer, bufsize, - errnop); - break; - case nss_lt_name: - rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT, - "getgrnam_r", compatsrc, name, grp, buffer, - bufsize, errnop); - break; - } - if (rv & NS_TERMINATE) - goto fin; - st->compat = COMPAT_MODE_OFF; - break; - case COMPAT_MODE_NAME: - set_lookup_type(dtab, nss_lt_name); - rv = _nsdispatch(&discard, dtab, NSDB_GROUP_COMPAT, - "getgrnam_r", compatsrc, st->name, grp, buffer, bufsize, - errnop); - switch (rv) { - case NS_SUCCESS: - switch (how) { - case nss_lt_name: - if (strcmp(name, grp->gr_name) != 0) - rv = NS_NOTFOUND; - break; - case nss_lt_id: - if (gid != grp->gr_gid) - rv = NS_NOTFOUND; - break; - default: - break; - } - break; - case NS_RETURN: - goto fin; - default: - break; - } - free(st->name); - st->name = NULL; - st->compat = COMPAT_MODE_OFF; - if (rv == NS_SUCCESS) - goto fin; - break; - default: - break; - } - rv = NS_NOTFOUND; - pos = ftello(st->fp); - while ((line = fgetln(st->fp, &linesize)) != NULL) { - if (line[linesize-1] == '\n') - linesize--; - if (linesize > 2 && line[0] == '+') { - p = memchr(&line[1], ':', linesize); - if (p == NULL || p == &line[1]) - st->compat = COMPAT_MODE_ALL; - else { - st->name = malloc(p - line); - if (st->name == NULL) { - syslog(LOG_ERR, - "getgrent memory allocation failure"); - *errnop = ENOMEM; - rv = NS_UNAVAIL; - break; - } - memcpy(st->name, &line[1], p - line - 1); - st->name[p - line - 1] = '\0'; - st->compat = COMPAT_MODE_NAME; - } - goto docompat; - } - rv = __gr_match_entry(line, linesize, how, name, gid); - if (rv != NS_SUCCESS) - continue; - /* We need room at least for the line, a string NUL - * terminator, alignment padding, and one (char *) - * pointer for the member list terminator. - */ - if (bufsize <= linesize + _ALIGNBYTES + sizeof(char *)) { - *errnop = ERANGE; - rv = NS_RETURN; - break; - } - memcpy(buffer, line, linesize); - buffer[linesize] = '\0'; - rv = __gr_parse_entry(buffer, linesize, grp, - &buffer[linesize + 1], bufsize - linesize - 1, errnop); - if (rv & NS_TERMINATE) - break; - pos = ftello(st->fp); - } -fin: - if (!stayopen && st->fp != NULL) { - fclose(st->fp); - st->fp = NULL; - } - if (rv == NS_SUCCESS && retval != NULL) - *(struct group **)retval = grp; - else if (rv == NS_RETURN && *errnop == ERANGE && st->fp != NULL) - fseeko(st->fp, pos, SEEK_SET); - return (rv); -#undef set_lookup_type -} - - -/* - * common group line matching and parsing - */ -int -__gr_match_entry(const char *line, size_t linesize, enum nss_lookup_type how, - const char *name, gid_t gid) -{ - size_t namesize; - const char *p, *eol; - char *q; - unsigned long n; - int i, needed; - - if (linesize == 0 || is_comment_line(line, linesize)) - return (NS_NOTFOUND); - switch (how) { - case nss_lt_name: needed = 1; break; - case nss_lt_id: needed = 2; break; - default: needed = 2; break; - } - eol = &line[linesize]; - for (p = line, i = 0; i < needed && p < eol; p++) - if (*p == ':') - i++; - if (i < needed) - return (NS_NOTFOUND); - switch (how) { - case nss_lt_name: - namesize = strlen(name); - if (namesize + 1 == (size_t)(p - line) && - memcmp(line, name, namesize) == 0) - return (NS_SUCCESS); - break; - case nss_lt_id: - n = strtoul(p, &q, 10); - if (q < eol && *q == ':' && gid == (gid_t)n) - return (NS_SUCCESS); - break; - case nss_lt_all: - return (NS_SUCCESS); - default: - break; - } - return (NS_NOTFOUND); -} - - -int -__gr_parse_entry(char *line, size_t linesize, struct group *grp, char *membuf, - size_t membufsize, int *errnop) -{ - char *s_gid, *s_mem, *p, **members; - unsigned long n; - int maxmembers; - - memset(grp, 0, sizeof(*grp)); - members = (char **)_ALIGN(membuf); - membufsize -= (char *)members - membuf; - maxmembers = membufsize / sizeof(*members); - if (maxmembers <= 0 || - (grp->gr_name = strsep(&line, ":")) == NULL || - grp->gr_name[0] == '\0' || - (grp->gr_passwd = strsep(&line, ":")) == NULL || - (s_gid = strsep(&line, ":")) == NULL || - s_gid[0] == '\0') - return (NS_NOTFOUND); - s_mem = line; - n = strtoul(s_gid, &s_gid, 10); - if (s_gid[0] != '\0') - return (NS_NOTFOUND); - grp->gr_gid = (gid_t)n; - grp->gr_mem = members; - while (maxmembers > 1 && s_mem != NULL) { - p = strsep(&s_mem, ","); - if (p != NULL && *p != '\0') { - *members++ = p; - maxmembers--; - } - } - *members = NULL; - if (s_mem == NULL) - return (NS_SUCCESS); - else { - *errnop = ERANGE; - return (NS_RETURN); - } -} - - |
