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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
1019 lines
24 KiB
C
1019 lines
24 KiB
C
/* Copyright (C) 1996, 1997, 1998, 1999, 2001 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <fcntl.h>
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#include <nss.h>
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#include <grp.h>
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#include <ctype.h>
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#include <bits/libc-lock.h>
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#include <string.h>
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#include <rpcsvc/yp.h>
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#include <rpcsvc/ypclnt.h>
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#include <rpcsvc/nis.h>
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#include <nsswitch.h>
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#include "nss-nisplus.h"
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#include "nisplus-parser.h"
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static service_user *ni;
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static bool_t use_nisplus; /* default: group_compat: nis */
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static nis_name grptable; /* Name of the group table */
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static size_t grptablelen;
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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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/* Structure for remembering -group members ... */
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#define BLACKLIST_INITIAL_SIZE 512
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#define BLACKLIST_INCREMENT 256
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struct blacklist_t
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{
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char *data;
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int current;
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int size;
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};
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struct ent_t
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{
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bool_t nis;
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bool_t nis_first;
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char *oldkey;
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int oldkeylen;
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nis_result *result;
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FILE *stream;
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struct blacklist_t blacklist;
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};
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typedef struct ent_t ent_t;
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static ent_t ext_ent = {0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0}};
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/* Protect global state against multiple changers. */
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__libc_lock_define_initialized (static, lock)
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/* Prototypes for local functions. */
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static void blacklist_store_name (const char *, ent_t *);
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static int in_blacklist (const char *, int, ent_t *);
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static enum nss_status
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_nss_first_init (void)
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{
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if (ni == NULL)
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{
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__nss_database_lookup ("group_compat", NULL, "nis", &ni);
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use_nisplus = (strcmp (ni->name, "nisplus") == 0);
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}
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if (grptable == NULL)
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{
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static const char key[] = "group.org_dir.";
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const char *local_dir = nis_local_directory ();
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size_t len_local_dir = strlen (local_dir);
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grptable = malloc (sizeof (key) + len_local_dir);
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if (grptable == NULL)
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return NSS_STATUS_TRYAGAIN;
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grptablelen = ((char *) mempcpy (mempcpy (grptable,
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key, sizeof (key) - 1),
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local_dir, len_local_dir + 1)
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- grptable) - 1;
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}
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return NSS_STATUS_SUCCESS;
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}
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static enum nss_status
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internal_setgrent (ent_t *ent)
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{
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enum nss_status status = NSS_STATUS_SUCCESS;
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ent->nis = ent->nis_first = 0;
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if (_nss_first_init () != NSS_STATUS_SUCCESS)
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return NSS_STATUS_UNAVAIL;
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if (ent->oldkey != NULL)
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{
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free (ent->oldkey);
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ent->oldkey = NULL;
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ent->oldkeylen = 0;
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}
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if (ent->result != NULL)
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{
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nis_freeresult (ent->result);
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ent->result = NULL;
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}
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if (ent->blacklist.data != NULL)
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{
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ent->blacklist.current = 1;
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ent->blacklist.data[0] = '|';
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ent->blacklist.data[1] = '\0';
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}
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else
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ent->blacklist.current = 0;
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if (ent->stream == NULL)
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{
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ent->stream = fopen ("/etc/group", "r");
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if (ent->stream == NULL)
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status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
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else
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{
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/* We have to make sure the file is `closed on exec'. */
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int result, flags;
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result = flags = fcntl (fileno (ent->stream), F_GETFD, 0);
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if (result >= 0)
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{
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flags |= FD_CLOEXEC;
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result = fcntl (fileno (ent->stream), F_SETFD, flags);
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}
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if (result < 0)
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{
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/* Something went wrong. Close the stream and return a
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failure. */
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fclose (ent->stream);
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ent->stream = NULL;
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status = NSS_STATUS_UNAVAIL;
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}
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}
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}
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else
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rewind (ent->stream);
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return status;
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}
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enum nss_status
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_nss_compat_setgrent (int stayopen)
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{
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enum nss_status result;
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__libc_lock_lock (lock);
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result = internal_setgrent (&ext_ent);
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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_endgrent (ent_t *ent)
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{
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if (ent->stream != NULL)
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{
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fclose (ent->stream);
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ent->stream = NULL;
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}
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ent->nis = ent->nis_first = 0;
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if (ent->oldkey != NULL)
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{
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free (ent->oldkey);
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ent->oldkey = NULL;
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ent->oldkeylen = 0;
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}
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if (ent->result != NULL)
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{
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nis_freeresult (ent->result);
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ent->result = NULL;
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}
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if (ent->blacklist.data != NULL)
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{
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ent->blacklist.current = 1;
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ent->blacklist.data[0] = '|';
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ent->blacklist.data[1] = '\0';
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}
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else
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ent->blacklist.current = 0;
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_compat_endgrent (void)
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{
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enum nss_status result;
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__libc_lock_lock (lock);
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result = internal_endgrent (&ext_ent);
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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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getgrent_next_nis (struct group *result, ent_t *ent, char *buffer,
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size_t buflen, int *errnop)
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{
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struct parser_data *data = (void *) buffer;
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char *domain;
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char *outkey, *outval;
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int outkeylen, outvallen, parse_res;
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char *p;
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if (yp_get_default_domain (&domain) != YPERR_SUCCESS)
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{
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ent->nis = 0;
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*errnop = ENOENT;
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return NSS_STATUS_NOTFOUND;
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}
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do
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{
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char *save_oldkey;
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int save_oldlen;
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bool_t save_nis_first;
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if (ent->nis_first)
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{
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if (yp_first (domain, "group.byname", &outkey, &outkeylen,
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&outval, &outvallen) != YPERR_SUCCESS)
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{
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ent->nis = 0;
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return NSS_STATUS_UNAVAIL;
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}
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if ( buflen < ((size_t) outvallen + 1))
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{
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free (outval);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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save_oldkey = ent->oldkey;
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save_oldlen = ent->oldkeylen;
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save_nis_first = TRUE;
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ent->oldkey = outkey;
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ent->oldkeylen = outkeylen;
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ent->nis_first = FALSE;
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}
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else
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{
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if (yp_next (domain, "group.byname", ent->oldkey, ent->oldkeylen,
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&outkey, &outkeylen, &outval, &outvallen)
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!= YPERR_SUCCESS)
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{
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ent->nis = 0;
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*errnop = ENOENT;
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return NSS_STATUS_NOTFOUND;
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}
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if ( buflen < ((size_t) outvallen + 1))
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{
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free (outval);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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save_oldkey = ent->oldkey;
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save_oldlen = ent->oldkeylen;
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save_nis_first = FALSE;
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ent->oldkey = outkey;
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ent->oldkeylen = outkeylen;
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}
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/* Copy the found data to our buffer... */
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p = strncpy (buffer, outval, buflen);
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/* ...and free the data. */
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free (outval);
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while (isspace (*p))
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++p;
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parse_res = _nss_files_parse_grent (p, result, data, buflen, errnop);
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if (parse_res == -1)
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{
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free (ent->oldkey);
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ent->oldkey = save_oldkey;
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ent->oldkeylen = save_oldlen;
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ent->nis_first = save_nis_first;
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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else
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{
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if (!save_nis_first)
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free (save_oldkey);
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}
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if (parse_res &&
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in_blacklist (result->gr_name, strlen (result->gr_name), ent))
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parse_res = 0; /* if result->gr_name in blacklist,search next entry */
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}
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while (!parse_res);
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return NSS_STATUS_SUCCESS;
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}
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static enum nss_status
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getgrent_next_nisplus (struct group *result, ent_t *ent, char *buffer,
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size_t buflen, int *errnop)
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{
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int parse_res;
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do
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{
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nis_result *save_oldres;
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bool_t save_nis_first;
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if (ent->nis_first)
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{
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save_oldres = ent->result;
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save_nis_first = TRUE;
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ent->result = nis_first_entry(grptable);
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if (niserr2nss (ent->result->status) != NSS_STATUS_SUCCESS)
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{
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ent->nis = 0;
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return niserr2nss (ent->result->status);
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}
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ent->nis_first = FALSE;
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}
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else
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{
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nis_result *res;
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save_oldres = ent->result;
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save_nis_first = FALSE;
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res = nis_next_entry(grptable, &ent->result->cookie);
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ent->result = res;
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if (niserr2nss (ent->result->status) != NSS_STATUS_SUCCESS)
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{
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ent->nis = 0;
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return niserr2nss (ent->result->status);
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}
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}
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parse_res = _nss_nisplus_parse_grent (ent->result, 0, result,
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buffer, buflen, errnop);
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if (parse_res == -1)
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{
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nis_freeresult (ent->result);
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ent->result = save_oldres;
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ent->nis_first = save_nis_first;
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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else
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{
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if (!save_nis_first)
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nis_freeresult (save_oldres);
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}
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if (parse_res &&
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in_blacklist (result->gr_name, strlen (result->gr_name), ent))
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parse_res = 0; /* if result->gr_name in blacklist,search next entry */
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}
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while (!parse_res);
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return NSS_STATUS_SUCCESS;
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}
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/* This function handle the +group entrys in /etc/group */
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static enum nss_status
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getgrnam_plusgroup (const char *name, struct group *result, char *buffer,
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size_t buflen, int *errnop)
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{
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struct parser_data *data = (void *) buffer;
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int parse_res;
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if (use_nisplus) /* Do the NIS+ query here */
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{
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nis_result *res;
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char buf[strlen (name) + 24 + grptablelen];
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sprintf(buf, "[name=%s],%s", name, grptable);
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res = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
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if (niserr2nss (res->status) != NSS_STATUS_SUCCESS)
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{
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enum nss_status status = niserr2nss (res->status);
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nis_freeresult (res);
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return status;
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}
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parse_res = _nss_nisplus_parse_grent (res, 0, result, buffer, buflen,
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errnop);
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if (parse_res == -1)
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{
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nis_freeresult (res);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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nis_freeresult (res);
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}
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else /* Use NIS */
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{
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char *domain, *outval, *p;
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int outvallen;
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if (yp_get_default_domain (&domain) != YPERR_SUCCESS)
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{
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*errnop = ENOENT;
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return NSS_STATUS_NOTFOUND;
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}
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if (yp_match (domain, "group.byname", name, strlen (name),
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&outval, &outvallen) != YPERR_SUCCESS)
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{
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*errnop = ENOENT;
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return NSS_STATUS_NOTFOUND;
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}
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if (buflen < ((size_t) outvallen + 1))
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{
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free (outval);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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/* Copy the found data to our buffer... */
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p = strncpy (buffer, outval, buflen);
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/* ... and free the data. */
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free (outval);
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while (isspace (*p))
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++p;
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parse_res = _nss_files_parse_grent (p, result, data, buflen, errnop);
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if (parse_res == -1)
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return NSS_STATUS_TRYAGAIN;
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}
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if (parse_res)
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/* We found the entry. */
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return NSS_STATUS_SUCCESS;
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else
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return NSS_STATUS_RETURN;
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}
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static enum nss_status
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getgrent_next_file (struct group *result, ent_t *ent,
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char *buffer, size_t buflen, int *errnop)
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{
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struct parser_data *data = (void *) buffer;
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while (1)
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{
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fpos_t pos;
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int parse_res = 0;
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char *p;
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do
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{
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fgetpos (ent->stream, &pos);
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buffer[buflen - 1] = '\xff';
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p = fgets (buffer, buflen, ent->stream);
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if (p == NULL && feof (ent->stream))
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{
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*errnop = ENOENT;
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return NSS_STATUS_NOTFOUND;
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}
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if (p == NULL || buffer[buflen - 1] != '\xff')
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{
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fsetpos (ent->stream, &pos);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
|
|
|
|
/* Terminate the line for any case. */
|
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buffer[buflen - 1] = '\0';
|
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|
|
/* Skip leading blanks. */
|
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while (isspace (*p))
|
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++p;
|
|
}
|
|
while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
|
|
/* Parse the line. If it is invalid, loop to
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|
get the next line of the file to parse. */
|
|
!(parse_res = _nss_files_parse_grent (p, result, data, buflen,
|
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errnop)));
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|
|
if (parse_res == -1)
|
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{
|
|
/* The parser ran out of space. */
|
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fsetpos (ent->stream, &pos);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
|
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}
|
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|
|
if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
|
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/* This is a real entry. */
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break;
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|
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/* -group */
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if (result->gr_name[0] == '-' && result->gr_name[1] != '\0'
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|
&& result->gr_name[1] != '@')
|
|
{
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blacklist_store_name (&result->gr_name[1], ent);
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continue;
|
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}
|
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|
|
/* +group */
|
|
if (result->gr_name[0] == '+' && result->gr_name[1] != '\0'
|
|
&& result->gr_name[1] != '@')
|
|
{
|
|
enum nss_status status;
|
|
|
|
/* Store the group in the blacklist for the "+" at the end of
|
|
/etc/group */
|
|
blacklist_store_name (&result->gr_name[1], ent);
|
|
status = getgrnam_plusgroup (&result->gr_name[1], result, buffer,
|
|
buflen, errnop);
|
|
if (status == NSS_STATUS_SUCCESS) /* We found the entry. */
|
|
break;
|
|
else
|
|
if (status == NSS_STATUS_RETURN /* We couldn't parse the entry */
|
|
|| status == NSS_STATUS_NOTFOUND) /* No group in NIS */
|
|
continue;
|
|
else
|
|
{
|
|
if (status == NSS_STATUS_TRYAGAIN)
|
|
{
|
|
/* The parser ran out of space. */
|
|
fsetpos (ent->stream, &pos);
|
|
*errnop = ERANGE;
|
|
}
|
|
return status;
|
|
}
|
|
}
|
|
|
|
/* +:... */
|
|
if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
|
|
{
|
|
ent->nis = TRUE;
|
|
ent->nis_first = TRUE;
|
|
|
|
if (use_nisplus)
|
|
return getgrent_next_nisplus (result, ent, buffer, buflen, errnop);
|
|
else
|
|
return getgrent_next_nis (result, ent, buffer, buflen, errnop);
|
|
}
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static enum nss_status
|
|
internal_getgrent_r (struct group *gr, ent_t *ent, char *buffer,
|
|
size_t buflen, int *errnop)
|
|
{
|
|
if (ent->nis)
|
|
{
|
|
if (use_nisplus)
|
|
return getgrent_next_nisplus (gr, ent, buffer, buflen, errnop);
|
|
else
|
|
return getgrent_next_nis (gr, ent, buffer, buflen, errnop);
|
|
}
|
|
else
|
|
return getgrent_next_file (gr, ent, buffer, buflen, errnop);
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_compat_getgrent_r (struct group *grp, char *buffer, size_t buflen,
|
|
int *errnop)
|
|
{
|
|
enum nss_status status = NSS_STATUS_SUCCESS;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
/* Be prepared that the setgrent function was not called before. */
|
|
if (ext_ent.stream == NULL)
|
|
status = internal_setgrent (&ext_ent);
|
|
|
|
if (status == NSS_STATUS_SUCCESS)
|
|
status = internal_getgrent_r (grp, &ext_ent, buffer, buflen, errnop);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
/* Searches in /etc/group and the NIS/NIS+ map for a special group */
|
|
static enum nss_status
|
|
internal_getgrnam_r (const char *name, struct group *result, ent_t *ent,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
struct parser_data *data = (void *) buffer;
|
|
while (1)
|
|
{
|
|
fpos_t pos;
|
|
int parse_res = 0;
|
|
char *p;
|
|
|
|
do
|
|
{
|
|
fgetpos (ent->stream, &pos);
|
|
buffer[buflen - 1] = '\xff';
|
|
p = fgets (buffer, buflen, ent->stream);
|
|
if (p == NULL && feof (ent->stream))
|
|
{
|
|
*errnop = ENOENT;
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
if (p == NULL || buffer[buflen - 1] != '\xff')
|
|
{
|
|
fsetpos (ent->stream, &pos);
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
/* Terminate the line for any case. */
|
|
buffer[buflen - 1] = '\0';
|
|
|
|
/* Skip leading blanks. */
|
|
while (isspace (*p))
|
|
++p;
|
|
}
|
|
while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
|
|
/* Parse the line. If it is invalid, loop to
|
|
get the next line of the file to parse. */
|
|
!(parse_res = _nss_files_parse_grent (p, result, data, buflen,
|
|
errnop)));
|
|
|
|
if (parse_res == -1)
|
|
{
|
|
/* The parser ran out of space. */
|
|
fsetpos (ent->stream, &pos);
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
/* This is a real entry. */
|
|
if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
|
|
{
|
|
if (strcmp (result->gr_name, name) == 0)
|
|
return NSS_STATUS_SUCCESS;
|
|
else
|
|
continue;
|
|
}
|
|
|
|
/* -group */
|
|
if (result->gr_name[0] == '-' && result->gr_name[1] != '\0')
|
|
{
|
|
if (strcmp (&result->gr_name[1], name) == 0)
|
|
{
|
|
*errnop = ENOENT;
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
else
|
|
continue;
|
|
}
|
|
|
|
/* +group */
|
|
if (result->gr_name[0] == '+' && result->gr_name[1] != '\0')
|
|
{
|
|
if (strcmp (name, &result->gr_name[1]) == 0)
|
|
{
|
|
enum nss_status status;
|
|
|
|
status = getgrnam_plusgroup (name, result, buffer, buflen,
|
|
errnop);
|
|
if (status == NSS_STATUS_RETURN)
|
|
/* We couldn't parse the entry */
|
|
continue;
|
|
else
|
|
return status;
|
|
}
|
|
}
|
|
/* +:... */
|
|
if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
|
|
{
|
|
enum nss_status status;
|
|
|
|
status = getgrnam_plusgroup (name, result, buffer, buflen, errnop);
|
|
if (status == NSS_STATUS_RETURN)
|
|
/* We couldn't parse the entry */
|
|
continue;
|
|
else
|
|
return status;
|
|
}
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_compat_getgrnam_r (const char *name, struct group *grp,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
ent_t ent = {0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0}};
|
|
enum nss_status status;
|
|
|
|
if (name[0] == '-' || name[0] == '+')
|
|
{
|
|
*errnop = ENOENT;
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
status = internal_setgrent (&ent);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
|
|
status = internal_getgrnam_r (name, grp, &ent, buffer, buflen, errnop);
|
|
|
|
internal_endgrent (&ent);
|
|
|
|
return status;
|
|
}
|
|
|
|
/* This function handle the + entry in /etc/group */
|
|
static enum nss_status
|
|
getgrgid_plusgroup (gid_t gid, struct group *result, char *buffer,
|
|
size_t buflen, int *errnop)
|
|
{
|
|
struct parser_data *data = (void *) buffer;
|
|
int parse_res;
|
|
|
|
if (use_nisplus) /* Do the NIS+ query here */
|
|
{
|
|
nis_result *res;
|
|
char buf[24 + grptablelen];
|
|
|
|
sprintf(buf, "[gid=%d],%s", gid, grptable);
|
|
res = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
|
|
if (niserr2nss (res->status) != NSS_STATUS_SUCCESS)
|
|
{
|
|
enum nss_status status = niserr2nss (res->status);
|
|
|
|
nis_freeresult (res);
|
|
return status;
|
|
}
|
|
if ((parse_res = _nss_nisplus_parse_grent (res, 0, result, buffer,
|
|
buflen, errnop)) == -1)
|
|
{
|
|
nis_freeresult (res);
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
nis_freeresult (res);
|
|
}
|
|
else /* Use NIS */
|
|
{
|
|
char buf[24];
|
|
char *domain, *outval, *p;
|
|
int outvallen;
|
|
|
|
if (yp_get_default_domain (&domain) != YPERR_SUCCESS)
|
|
{
|
|
*errnop = ENOENT;
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
|
|
snprintf (buf, sizeof (buf), "%d", gid);
|
|
|
|
if (yp_match (domain, "group.bygid", buf, strlen (buf),
|
|
&outval, &outvallen) != YPERR_SUCCESS)
|
|
{
|
|
*errnop = ENOENT;
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
|
|
if (buflen < ((size_t) outvallen + 1))
|
|
{
|
|
free (outval);
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
/* Copy the found data to our buffer... */
|
|
p = strncpy (buffer, outval, buflen);
|
|
|
|
/* ... and free the data. */
|
|
free (outval);
|
|
|
|
while (isspace (*p))
|
|
p++;
|
|
parse_res = _nss_files_parse_grent (p, result, data, buflen, errnop);
|
|
if (parse_res == -1)
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
if (parse_res)
|
|
/* We found the entry. */
|
|
return NSS_STATUS_SUCCESS;
|
|
else
|
|
return NSS_STATUS_RETURN;
|
|
}
|
|
|
|
/* Searches in /etc/group and the NIS/NIS+ map for a special group id */
|
|
static enum nss_status
|
|
internal_getgrgid_r (gid_t gid, struct group *result, ent_t *ent,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
struct parser_data *data = (void *) buffer;
|
|
while (1)
|
|
{
|
|
fpos_t pos;
|
|
int parse_res = 0;
|
|
char *p;
|
|
|
|
do
|
|
{
|
|
fgetpos (ent->stream, &pos);
|
|
buffer[buflen - 1] = '\xff';
|
|
p = fgets (buffer, buflen, ent->stream);
|
|
if (p == NULL && feof (ent->stream))
|
|
{
|
|
*errnop = ENOENT;
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
if (p == NULL || buffer[buflen - 1] != '\xff')
|
|
{
|
|
fsetpos (ent->stream, &pos);
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
/* Terminate the line for any case. */
|
|
buffer[buflen - 1] = '\0';
|
|
|
|
/* Skip leading blanks. */
|
|
while (isspace (*p))
|
|
++p;
|
|
}
|
|
while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
|
|
/* Parse the line. If it is invalid, loop to
|
|
get the next line of the file to parse. */
|
|
!(parse_res = _nss_files_parse_grent (p, result, data, buflen,
|
|
errnop)));
|
|
|
|
if (parse_res == -1)
|
|
{
|
|
/* The parser ran out of space. */
|
|
fsetpos (ent->stream, &pos);
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
/* This is a real entry. */
|
|
if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
|
|
{
|
|
if (result->gr_gid == gid)
|
|
return NSS_STATUS_SUCCESS;
|
|
else
|
|
continue;
|
|
}
|
|
|
|
/* -group */
|
|
if (result->gr_name[0] == '-' && result->gr_name[1] != '\0')
|
|
{
|
|
blacklist_store_name (&result->gr_name[1], ent);
|
|
continue;
|
|
}
|
|
|
|
/* +group */
|
|
if (result->gr_name[0] == '+' && result->gr_name[1] != '\0')
|
|
{
|
|
enum nss_status status;
|
|
|
|
/* Store the group in the blacklist for the "+" at the end of
|
|
/etc/group */
|
|
blacklist_store_name (&result->gr_name[1], ent);
|
|
status = getgrnam_plusgroup (&result->gr_name[1], result, buffer,
|
|
buflen, errnop);
|
|
if (status == NSS_STATUS_SUCCESS && result->gr_gid == gid)
|
|
break;
|
|
else
|
|
continue;
|
|
}
|
|
/* +:... */
|
|
if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
|
|
{
|
|
enum nss_status status;
|
|
|
|
status = getgrgid_plusgroup (gid, result, buffer, buflen, errnop);
|
|
if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
|
|
{
|
|
*errnop = ENOENT;
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
else
|
|
return status;
|
|
}
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_compat_getgrgid_r (gid_t gid, struct group *grp,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
ent_t ent = {0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0}};
|
|
enum nss_status status;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
status = internal_setgrent (&ent);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
|
|
status = internal_getgrgid_r (gid, grp, &ent, buffer, buflen, errnop);
|
|
|
|
internal_endgrent (&ent);
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
/* Support routines for remembering -@netgroup and -user entries.
|
|
The names are stored in a single string with `|' as separator. */
|
|
static void
|
|
blacklist_store_name (const char *name, ent_t *ent)
|
|
{
|
|
int namelen = strlen (name);
|
|
char *tmp;
|
|
|
|
/* first call, setup cache */
|
|
if (ent->blacklist.size == 0)
|
|
{
|
|
ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
|
|
ent->blacklist.data = malloc (ent->blacklist.size);
|
|
if (ent->blacklist.data == NULL)
|
|
return;
|
|
ent->blacklist.data[0] = '|';
|
|
ent->blacklist.data[1] = '\0';
|
|
ent->blacklist.current = 1;
|
|
}
|
|
else
|
|
{
|
|
if (in_blacklist (name, namelen, ent))
|
|
return; /* no duplicates */
|
|
|
|
if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
|
|
{
|
|
ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
|
|
tmp = realloc (ent->blacklist.data, ent->blacklist.size);
|
|
if (tmp == NULL)
|
|
{
|
|
free (ent->blacklist.data);
|
|
ent->blacklist.size = 0;
|
|
return;
|
|
}
|
|
ent->blacklist.data = tmp;
|
|
}
|
|
}
|
|
|
|
tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
|
|
*tmp++ = '|';
|
|
*tmp = '\0';
|
|
ent->blacklist.current += namelen + 1;
|
|
|
|
return;
|
|
}
|
|
|
|
/* returns TRUE if ent->blacklist contains name, else FALSE */
|
|
static bool_t
|
|
in_blacklist (const char *name, int namelen, ent_t *ent)
|
|
{
|
|
char buf[namelen + 3];
|
|
char *cp;
|
|
|
|
if (ent->blacklist.data == NULL)
|
|
return FALSE;
|
|
|
|
buf[0] = '|';
|
|
cp = stpcpy (&buf[1], name);
|
|
*cp++= '|';
|
|
*cp = '\0';
|
|
return strstr (ent->blacklist.data, buf) != NULL;
|
|
}
|