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/* Copyright (C) 1996-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <ctype.h>
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#include <errno.h>
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#include <grp.h>
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#include <nss.h>
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#include <string.h>
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#include <libc-lock.h>
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#include <rpcsvc/yp.h>
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#include <rpcsvc/ypclnt.h>
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#include "nss-nis.h"
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#include <libnsl.h>
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/* Get the declaration of the parser function. */
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#define ENTNAME grent
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#define STRUCTURE group
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#define EXTERN_PARSER
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#include <nss/nss_files/files-parse.c>
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/* Protect global state against multiple changers */
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__libc_lock_define_initialized (static, lock)
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static bool_t new_start = 1;
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static char *oldkey;
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static int oldkeylen;
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static intern_t intern;
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static void
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internal_nis_endgrent (void)
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{
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new_start = 1;
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if (oldkey != NULL)
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{
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free (oldkey);
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oldkey = NULL;
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oldkeylen = 0;
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}
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struct response_t *curr = intern.start;
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while (curr != NULL)
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{
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struct response_t *last = curr;
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curr = curr->next;
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free (last);
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}
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intern.next = intern.start = NULL;
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}
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enum nss_status
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_nss_nis_endgrent (void)
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{
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__libc_lock_lock (lock);
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internal_nis_endgrent ();
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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internal_nis_setgrent (void)
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{
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/* We have to read all the data now. */
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char *domain;
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if (__glibc_unlikely (yp_get_default_domain (&domain)))
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return NSS_STATUS_UNAVAIL;
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struct ypall_callback ypcb;
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ypcb.foreach = _nis_saveit;
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ypcb.data = (char *) &intern;
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enum nss_status status = yperr2nss (yp_all (domain, "group.byname", &ypcb));
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/* Mark the last buffer as full. */
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if (intern.next != NULL)
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intern.next->size = intern.offset;
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intern.next = intern.start;
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intern.offset = 0;
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return status;
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}
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enum nss_status
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_nss_nis_setgrent (int stayopen)
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{
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enum nss_status result = NSS_STATUS_SUCCESS;
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__libc_lock_lock (lock);
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internal_nis_endgrent ();
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if (_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
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result = internal_nis_setgrent ();
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__libc_lock_unlock (lock);
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return result;
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}
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static enum nss_status
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internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen,
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int *errnop)
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{
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/* If we read the entire database at setpwent time we just iterate
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over the data we have in memory. */
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bool batch_read = intern.start != NULL;
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char *domain = NULL;
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if (!batch_read && __builtin_expect (yp_get_default_domain (&domain), 0))
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return NSS_STATUS_UNAVAIL;
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/* Get the next entry until we found a correct one. */
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int parse_res;
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do
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{
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char *result;
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char *outkey;
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int len;
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int keylen;
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if (batch_read)
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{
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struct response_t *bucket;
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handle_batch_read:
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bucket = intern.next;
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if (__glibc_unlikely (intern.offset >= bucket->size))
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{
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if (bucket->next == NULL)
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return NSS_STATUS_NOTFOUND;
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/* We look at all the content in the current bucket. Go on
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to the next. */
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bucket = intern.next = bucket->next;
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intern.offset = 0;
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}
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for (result = &bucket->mem[intern.offset]; isspace (*result);
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++result)
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++intern.offset;
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len = strlen (result);
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}
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else
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{
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int yperr;
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if (new_start)
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{
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/* Maybe we should read the database in one piece. */
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if ((_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ)
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&& internal_nis_setgrent () == NSS_STATUS_SUCCESS
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&& intern.start != NULL)
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{
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batch_read = true;
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goto handle_batch_read;
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}
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yperr = yp_first (domain, "group.byname", &outkey, &keylen,
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&result, &len;;
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}
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else
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yperr = yp_next (domain, "group.byname", oldkey, oldkeylen,
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&outkey, &keylen, &result, &len;;
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if (__glibc_unlikely (yperr != YPERR_SUCCESS))
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{
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enum nss_status retval = yperr2nss (yperr);
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if (retval == NSS_STATUS_TRYAGAIN)
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*errnop = errno;
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return retval;
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}
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}
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if (__glibc_unlikely ((size_t) (len + 1) > buflen))
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{
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if (!batch_read)
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free (result);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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char *p = strncpy (buffer, result, len);
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buffer[len] = '\0';
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while (isspace (*p))
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++p;
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if (!batch_read)
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free (result);
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parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
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errnop);
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if (__glibc_unlikely (parse_res == -1))
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{
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if (!batch_read)
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free (outkey);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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if (batch_read)
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intern.offset += len + 1;
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else
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{
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free (oldkey);
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oldkey = outkey;
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oldkeylen = keylen;
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new_start = 0;
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}
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}
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while (parse_res < 1);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nis_getgrent_r (struct group *result, char *buffer, size_t buflen,
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int *errnop)
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{
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int status;
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__libc_lock_lock (lock);
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status = internal_nis_getgrent_r (result, buffer, buflen, errnop);
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__libc_lock_unlock (lock);
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return status;
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}
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enum nss_status
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_nss_nis_getgrnam_r (const char *name, struct group *grp,
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char *buffer, size_t buflen, int *errnop)
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{
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if (name == NULL)
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{
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*errnop = EINVAL;
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return NSS_STATUS_UNAVAIL;
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}
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char *domain;
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if (__glibc_unlikely (yp_get_default_domain (&domain)))
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return NSS_STATUS_UNAVAIL;
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char *result;
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int len;
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int yperr = yp_match (domain, "group.byname", name, strlen (name), &result,
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&len;;
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if (__glibc_unlikely (yperr != YPERR_SUCCESS))
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{
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enum nss_status retval = yperr2nss (yperr);
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if (retval == NSS_STATUS_TRYAGAIN)
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*errnop = errno;
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return retval;
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6c4009 |
}
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if (__glibc_unlikely ((size_t) (len + 1) > buflen))
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{
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free (result);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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6c4009 |
}
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char *p = strncpy (buffer, result, len);
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buffer[len] = '\0';
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6c4009 |
while (isspace (*p))
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++p;
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free (result);
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int parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
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6c4009 |
errnop);
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6c4009 |
if (__builtin_expect (parse_res < 1, 0))
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{
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6c4009 |
if (parse_res == -1)
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6c4009 |
return NSS_STATUS_TRYAGAIN;
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6c4009 |
else
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6c4009 |
return NSS_STATUS_NOTFOUND;
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6c4009 |
}
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6c4009 |
return NSS_STATUS_SUCCESS;
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6c4009 |
}
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6c4009 |
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6c4009 |
enum nss_status
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6c4009 |
_nss_nis_getgrgid_r (gid_t gid, struct group *grp,
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6c4009 |
char *buffer, size_t buflen, int *errnop)
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
char *domain;
|
|
Packit |
6c4009 |
if (__glibc_unlikely (yp_get_default_domain (&domain)))
|
|
Packit |
6c4009 |
return NSS_STATUS_UNAVAIL;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
char buf[32];
|
|
Packit |
6c4009 |
int nlen = sprintf (buf, "%lu", (unsigned long int) gid);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
char *result;
|
|
Packit |
6c4009 |
int len;
|
|
Packit |
6c4009 |
int yperr = yp_match (domain, "group.bygid", buf, nlen, &result, &len;;
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (__glibc_unlikely (yperr != YPERR_SUCCESS))
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
enum nss_status retval = yperr2nss (yperr);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (retval == NSS_STATUS_TRYAGAIN)
|
|
Packit |
6c4009 |
*errnop = errno;
|
|
Packit |
6c4009 |
return retval;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
if (__glibc_unlikely ((size_t) (len + 1) > buflen))
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
free (result);
|
|
Packit |
6c4009 |
*errnop = ERANGE;
|
|
Packit |
6c4009 |
return NSS_STATUS_TRYAGAIN;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
char *p = strncpy (buffer, result, len);
|
|
Packit |
6c4009 |
buffer[len] = '\0';
|
|
Packit |
6c4009 |
while (isspace (*p))
|
|
Packit |
6c4009 |
++p;
|
|
Packit |
6c4009 |
free (result);
|
|
Packit |
6c4009 |
|
|
Packit |
6c4009 |
int parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen,
|
|
Packit |
6c4009 |
errnop);
|
|
Packit |
6c4009 |
if (__glibc_unlikely (parse_res < 1))
|
|
Packit |
6c4009 |
{
|
|
Packit |
6c4009 |
if (parse_res == -1)
|
|
Packit |
6c4009 |
return NSS_STATUS_TRYAGAIN;
|
|
Packit |
6c4009 |
else
|
|
Packit |
6c4009 |
return NSS_STATUS_NOTFOUND;
|
|
Packit |
6c4009 |
}
|
|
Packit |
6c4009 |
return NSS_STATUS_SUCCESS;
|
|
Packit |
6c4009 |
}
|