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Thu Nov 14 02:00:33 1996 Ulrich Drepper <drepper@cygnus.com> * inet/Makefile (headers): Add aliases.h. (routines): Add getaliasent_r, getaliasent, getaliasname, and getaliasname_r. * aliases.h: New file. * inet/aliases.h: New file. * inet/getaliasent.c: New file. * inet/getaliasent_r.c: New file. * inet/getaliasname.c: New file. * inet/getaliasname_r.c: New file. * nss/Makefile (databases): Add alias. * nss/alias-lookup.c: New file. * nss/databases.def: Add aliases and publickey. * nss/nss_db/db-alias.c: New file. * nss/nss_files/files-alias.c: New file. * inet/getnetgrent_r.c (__internal_getnetgrent): Buffer length argument to lookup function is of type size_t. (innetgr): Likewise. * nss/getXXbyYY_r.c: Likewise. * nss/getXXent_r.c: Likewise. * nss/nss_db/db-XXX.c: Likewise. * nss/getXXbyYY.c: Don't provide static buffer. Resize if call failed because buffer was too small. * nss/getXXent.c: Likewise. * nss/nss_files/files-XXX.c: Correct handling of shared file. The getXXent_r function now uses f[gs]etpos to get to the correct position. * nss/nss_files/files-parse.c: Indent lines for better readability. * malloc/obstack.c: Add new variable obstack_alloc_failed_handler and new function print_and_abort. Remove all references to alloc_failed field. Add new function _obstack_memory_used. * malloc/obstack.h (struct obstack): Remove field alloc_field. Remove all references to alloc_failed field. Add prototype for _obstack_memory_used. * posix/unistd.h: Correct typo. Wed Nov 13 03:09:16 1996 Ulrich Drepper <drepper@cygnus.com> * configure.in: Require at least autoconf-2.10.2. Tue Nov 12 03:35:01 1996 Christian von Roques <roques@pond.sub.org> * malloc/obstack.h: Add new macro `obstack_make_room'. * malloc/obstack.c: Add function implementation for `obstack_make_room'. Mon Nov 11 13:54:04 1996 Ulrich Drepper <drepper@cygnus.com> Update to BIND-4.9.5-REL. * resolv/Banner: Set to 4.9.5-REL. * resolv/inet_net_pton.c: Was doing bad things to subnets and b'casts. * resolv/res_debug.c (__fp_nquery): Could read past end of buffer. (fix from BIND 8.1) * config.make.in: Add definition for top_absdir. * Makerules (make-link): Fix path to rellns-sh script. Sat Nov 9 02:15:24 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * posix/unistd.h: Fix comment. * manual/arith.texi: Fix misspellings. Use `zero', not `null', when talking about numbers. * manual/users.texi: Likewise. * manual/creature.texi: Likewise. Use @defvarx for a secondary description header. Sat Nov 9 19:25:11 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/posix/Makefile ($(common-objpfx)mk-stdiolim): Depend on the real posix1_lim.h file so that it works in all subdirs, not only in posix. Sat Nov 9 02:08:34 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makefile ($(includedir)/gnu/lib-names.h): Quote arguments of tr. Sat Nov 9 02:06:17 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/Makefile ($(common-objpfx)s-proto.d): Don't depend on $(before-compile) which hasn't been properly setup yet at this point. Sat Nov 9 02:02:48 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/generic/sigset.h: Don't use implicit int which will probably require a diagnostic in the next revision of the C standard. * sysdeps/stub/lockfile.c: Likewise. Sat Nov 9 01:57:17 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/m68k/syscall.S: Correct last change. * sysdeps/unix/sysv/linux/m68k/sysdep.h: Likewise. Mon Nov 11 02:53:14 1996 Ulrich Drepper <drepper@cygnus.com> * time/strftime.c: Update copyright. Small cosmetic changes. char *' and `int'. PROJ_ID are used.
236 lines
5.5 KiB
C
236 lines
5.5 KiB
C
/* Mail alias file parser in nss_db module.
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Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <aliases.h>
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#include <alloca.h>
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#include <ctype.h>
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#include <db.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libc-lock.h>
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#include <paths.h>
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#include <string.h>
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#include "nsswitch.h"
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/* Locks the static variables in this file. */
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__libc_lock_define_initialized (static, lock)
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/* Maintenance of the shared handle open on the database. */
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static DB *db;
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static int keep_db;
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static unsigned int entidx; /* Index for `getaliasent_r'. */
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/* Open database file if not already opened. */
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static enum nss_status
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internal_setent (int stayopen)
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{
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enum nss_status status = NSS_STATUS_SUCCESS;
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if (db == NULL)
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{
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db = dbopen (_PATH_VARDB "aliases.db", O_RDONLY, 0, DB_BTREE, NULL);
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if (db == NULL)
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status = NSS_STATUS_UNAVAIL;
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}
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/* Remember STAYOPEN flag. */
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if (db != NULL)
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keep_db |= stayopen;
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return status;
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}
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/* Thread-safe, exported version of that. */
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enum nss_status
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_nss_db_setaliasent (int stayopen)
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{
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enum nss_status status;
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__libc_lock_lock (lock);
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status = internal_setent (stayopen);
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/* Reset the sequential index. */
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entidx = 0;
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__libc_lock_unlock (lock);
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return status;
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}
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/* Close the database file. */
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static void
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internal_endent (void)
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{
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if (db != NULL)
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{
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(*db->close) (db);
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db = NULL;
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}
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}
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/* Thread-safe, exported version of that. */
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enum nss_status
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_nss_db_endaliasent (void)
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{
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__libc_lock_lock (lock);
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internal_endent ();
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/* Reset STAYOPEN flag. */
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keep_db = 0;
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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/* We provide the parse function here. The parser in libnss_files
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cannot be used. The generation of the db file already resolved all
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:include: statements so we simply have to parse the list and store
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the result. */
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static enum nss_status
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lookup (const DBT *key, struct aliasent *result, char *buffer,
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size_t buflen)
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{
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enum nss_status status;
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DBT value;
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/* Open the database. */
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status = internal_setent (keep_db);
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if (status != NSS_STATUS_SUCCESS)
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return status;
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if ((*db->get) (db, key, &value, 0) == 0)
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{
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const char *src = value.data;
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result->alias_members_len = 0;
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/* We now have to fill the BUFFER with all the information. */
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if (buflen < key->size + 1)
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{
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no_more_room:
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__set_errno (ERANGE);
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return NSS_STATUS_TRYAGAIN;
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}
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if (status == NSS_STATUS_SUCCESS)
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{
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char *cp;
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size_t cnt;
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buffer = stpncpy (buffer, key->data, key->size) + 1;
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buflen -= key->size + 1;
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while (*src != '\0')
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{
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const char *end, *upto;
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while (isspace (*src))
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++src;
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end = strchr (src, ',');
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if (end == NULL)
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end = strchr (src, '\0');
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for (upto = end; upto > src && isspace (upto[-1]); --upto);
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if (upto != src)
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{
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if ((upto - src) + __alignof__ (char *) > buflen)
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goto no_more_room;
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buffer = stpncpy (buffer, src, upto - src) + 1;
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buflen -= (upto - src) + __alignof (char *);
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++result->alias_members_len;
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}
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src = end + (*end != '\0');
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}
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/* Now prepare the return. Provide string pointers for the
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currently selected aliases. */
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/* Adjust the pointer so it is aligned for storing pointers. */
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buffer += __alignof__ (char *) - 1;
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buffer -= ((buffer - (char *) 0) % __alignof__ (char *));
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result->alias_members = (char **) buffer;
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/* Compute addresses of alias entry strings. */
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cp = result->alias_name;
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for (cnt = 0; cnt < result->alias_members_len; ++cnt)
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{
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cp = strchr (cp, '\0') + 1;
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result->alias_members[cnt] = cp;
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}
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status = (result->alias_members_len == 0
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? NSS_STATUS_RETURN : NSS_STATUS_SUCCESS);
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}
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}
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else
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status = NSS_STATUS_NOTFOUND;
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if (! keep_db)
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internal_endent ();
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return status;
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}
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enum nss_status
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_nss_db_getaliasent_r (struct aliasent *result, char *buffer, size_t buflen)
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{
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/* Return next entry in host file. */
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enum nss_status status;
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char buf[20];
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DBT key;
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__libc_lock_lock (lock);
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key.size = 1 + snprintf (key.data = buf, sizeof buf, "0%u", entidx++);
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status = lookup (&key, result, buffer, buflen);
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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_db_getaliasbyname_r (const char *name, struct aliasent *result,
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char *buffer, size_t buflen)
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{
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DBT key;
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enum nss_status status;
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key.size = 1 + strlen (name);
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key.data = __alloca (key.size);
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((char *) key.data)[0] = '.';
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memcpy (&((char *) key.data)[1], name, key.size - 1);
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__libc_lock_lock (lock);
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status = lookup (&key, result, buffer, buflen);
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__libc_lock_unlock (lock);
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return status;
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}
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