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authorUlrich Drepper <drepper@redhat.com>1996-11-14 02:04:07 +0000
committerUlrich Drepper <drepper@redhat.com>1996-11-14 02:04:07 +0000
commit26761c287fdf4a9997b7c62b5c64cec84ce2c329 (patch)
tree2f7ac77185952d09a03a988f3176e18e476fe7ee /nss/nss_db/db-alias.c
parentb8591d1bdf48f5560a3a8e1326758a5aa5e529cf (diff)
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update from main archive 961113
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.
Diffstat (limited to 'nss/nss_db/db-alias.c')
-rw-r--r--nss/nss_db/db-alias.c235
1 files changed, 235 insertions, 0 deletions
diff --git a/nss/nss_db/db-alias.c b/nss/nss_db/db-alias.c
new file mode 100644
index 0000000000..2c44f4df79
--- /dev/null
+++ b/nss/nss_db/db-alias.c
@@ -0,0 +1,235 @@
+/* Mail alias file parser in nss_db module.
+ Copyright (C) 1996 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <aliases.h>
+#include <alloca.h>
+#include <ctype.h>
+#include <db.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <libc-lock.h>
+#include <paths.h>
+#include <string.h>
+
+#include "nsswitch.h"
+
+/* Locks the static variables in this file. */
+__libc_lock_define_initialized (static, lock)
+
+/* Maintenance of the shared handle open on the database. */
+
+static DB *db;
+static int keep_db;
+static unsigned int entidx; /* Index for `getaliasent_r'. */
+
+/* Open database file if not already opened. */
+static enum nss_status
+internal_setent (int stayopen)
+{
+ enum nss_status status = NSS_STATUS_SUCCESS;
+
+ if (db == NULL)
+ {
+ db = dbopen (_PATH_VARDB "aliases.db", O_RDONLY, 0, DB_BTREE, NULL);
+
+ if (db == NULL)
+ status = NSS_STATUS_UNAVAIL;
+ }
+
+ /* Remember STAYOPEN flag. */
+ if (db != NULL)
+ keep_db |= stayopen;
+
+ return status;
+}
+
+
+/* Thread-safe, exported version of that. */
+enum nss_status
+_nss_db_setaliasent (int stayopen)
+{
+ enum nss_status status;
+
+ __libc_lock_lock (lock);
+
+ status = internal_setent (stayopen);
+
+ /* Reset the sequential index. */
+ entidx = 0;
+
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+
+/* Close the database file. */
+static void
+internal_endent (void)
+{
+ if (db != NULL)
+ {
+ (*db->close) (db);
+ db = NULL;
+ }
+}
+
+
+/* Thread-safe, exported version of that. */
+enum nss_status
+_nss_db_endaliasent (void)
+{
+ __libc_lock_lock (lock);
+
+ internal_endent ();
+
+ /* Reset STAYOPEN flag. */
+ keep_db = 0;
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+/* We provide the parse function here. The parser in libnss_files
+ cannot be used. The generation of the db file already resolved all
+ :include: statements so we simply have to parse the list and store
+ the result. */
+static enum nss_status
+lookup (const DBT *key, struct aliasent *result, char *buffer,
+ size_t buflen)
+{
+ enum nss_status status;
+ DBT value;
+
+ /* Open the database. */
+ status = internal_setent (keep_db);
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+
+ if ((*db->get) (db, key, &value, 0) == 0)
+ {
+ const char *src = value.data;
+
+ result->alias_members_len = 0;
+
+ /* We now have to fill the BUFFER with all the information. */
+ if (buflen < key->size + 1)
+ {
+ no_more_room:
+ __set_errno (ERANGE);
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ if (status == NSS_STATUS_SUCCESS)
+ {
+ char *cp;
+ size_t cnt;
+
+ buffer = stpncpy (buffer, key->data, key->size) + 1;
+ buflen -= key->size + 1;
+
+ while (*src != '\0')
+ {
+ const char *end, *upto;
+ while (isspace (*src))
+ ++src;
+
+ end = strchr (src, ',');
+ if (end == NULL)
+ end = strchr (src, '\0');
+ for (upto = end; upto > src && isspace (upto[-1]); --upto);
+
+ if (upto != src)
+ {
+ if ((upto - src) + __alignof__ (char *) > buflen)
+ goto no_more_room;
+ buffer = stpncpy (buffer, src, upto - src) + 1;
+ buflen -= (upto - src) + __alignof (char *);
+ ++result->alias_members_len;
+ }
+ src = end + (*end != '\0');
+ }
+
+ /* Now prepare the return. Provide string pointers for the
+ currently selected aliases. */
+
+ /* Adjust the pointer so it is aligned for storing pointers. */
+ buffer += __alignof__ (char *) - 1;
+ buffer -= ((buffer - (char *) 0) % __alignof__ (char *));
+ result->alias_members = (char **) buffer;
+
+ /* Compute addresses of alias entry strings. */
+ cp = result->alias_name;
+ for (cnt = 0; cnt < result->alias_members_len; ++cnt)
+ {
+ cp = strchr (cp, '\0') + 1;
+ result->alias_members[cnt] = cp;
+ }
+
+ status = (result->alias_members_len == 0
+ ? NSS_STATUS_RETURN : NSS_STATUS_SUCCESS);
+ }
+ }
+ else
+ status = NSS_STATUS_NOTFOUND;
+
+ if (! keep_db)
+ internal_endent ();
+
+ return status;
+}
+
+enum nss_status
+_nss_db_getaliasent_r (struct aliasent *result, char *buffer, size_t buflen)
+{
+ /* Return next entry in host file. */
+ enum nss_status status;
+ char buf[20];
+ DBT key;
+
+ __libc_lock_lock (lock);
+ key.size = 1 + snprintf (key.data = buf, sizeof buf, "0%u", entidx++);
+ status = lookup (&key, result, buffer, buflen);
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+
+enum nss_status
+_nss_db_getaliasbyname_r (const char *name, struct aliasent *result,
+ char *buffer, size_t buflen)
+{
+ DBT key;
+ enum nss_status status;
+
+ key.size = 1 + strlen (name);
+
+ key.data = __alloca (key.size);
+ ((char *) key.data)[0] = '.';
+ memcpy (&((char *) key.data)[1], name, key.size - 1);
+
+ __libc_lock_lock (lock);
+ status = lookup (&key, result, buffer, buflen);
+ __libc_lock_unlock (lock);
+
+ return status;
+}