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authorRoland McGrath <roland@gnu.org>1996-07-02 19:35:40 +0000
committerRoland McGrath <roland@gnu.org>1996-07-02 19:35:40 +0000
commit96bda0ea44eb94e0284e91f20ba9733ae63f26a5 (patch)
treed588be55a83c556ac5e617a680fbf53186c9bbb1 /nss/nss_db
parentffee131630368bc2600747346d0b03025cbca6ee (diff)
downloadglibc-96bda0ea44eb94e0284e91f20ba9733ae63f26a5.tar.gz
* nss/nss_files/files-network.c: Pass empty for new DB_LOOKUP args.
(DATABASE): Define this instead of DATAFILE. * nss/nss_files/files-hosts.c: Likewise. (hostbyname): Use LOOKUP_NAME macro. * nss/nss_db/db-XXX.c: New file. * nss/Makefile (services): Add db. (libnss_db-inhibit-o): New variable. (libnss_db-routines): New variable. (distribute): Append db-XXX.c. (libnss_db.so): Depend on libdb.so and libnss_files.so. ($(libnss_db-routines:%=$(objpfx)%.c)): New static pattern rule. * nss/nss_files/files-XXX.c (DB_LOOKUP): Add KEYSIZE and KEYPATTERN args, ignored. (DATAFILE): New macro. * nss/nss_files/files-parse.c (GENERIC): If undefined, define to "files-XXX.c". * nss/nss_files/files-rpc.c: Include GENERIC instead of "files-XXX.c". Pass db key args to DB_LOOKUP. (DATAFILE): Macro removed. (DATABASE): New macro replaces it, lacks "/etc/" prefix. * nss/nss_files/files-service.c: Likewise. * nss/nss_files/files-pwd.c: Likewise. * nss/nss_files/files-proto.c: Likewise. * nss/nss_files/files-grp.c: Likewise. * nss/nss_files/files-ethers.c: Likewise. * elf/linux-compat.c: File removed. * elf/Makefile (distribute): Remove linux-compat.c. (ld-linux.so.1): Remove target and associated variables. * sunrpc/xdr.c: Remove malloc decl. * sunrpc/portmap.c: Likewise. * sunrpc/svc_tcp.c (abort): Don't declare. Instead define as macro casting abort to fn returning bool_t. * nss/nss_files/files-parse.c [EXTERN_PARSER]: Do an extern decl of the parser function. [EXTERN_PARSER] (LINE_PARSER): Define to empty. * nss/nss_files/files-pwd.c (EXTERN_PARSER): Define it. * nss/nss_files/files-grp.c: Likewise. * Makeconfig (BUILD_CC): If undefined, define to $(CC). * sunrpc/rpc/types.h: Include stdlib.h instead of declaring malloc. * Makeconfig (built-program-cmd): Use $(rtld-installed-name) in place of ld.so so lookups for that soname find it. * nss/Makefile (libnss_dns.so): Depend on libresolv.so. (resobjdir, LDLIBS-nss_dns.so): Variables removed.
Diffstat (limited to 'nss/nss_db')
-rw-r--r--nss/nss_db/db-XXX.c203
1 files changed, 203 insertions, 0 deletions
diff --git a/nss/nss_db/db-XXX.c b/nss/nss_db/db-XXX.c
new file mode 100644
index 0000000000..3f6f35d7ec
--- /dev/null
+++ b/nss/nss_db/db-XXX.c
@@ -0,0 +1,203 @@
+/* Common code for DB-based databases in nss_db module.
+Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <db.h>
+#include <fcntl.h>
+#include <libc-lock.h>
+#include "nsswitch.h"
+
+/* These symbols are defined by the including source file:
+
+ ENTNAME -- database name of the structure and functions (hostent, pwent).
+ STRUCTURE -- struct name, define only if not ENTNAME (passwd, group).
+ DATABASE -- database file name, ("hosts", "passwd")
+
+ NEED_H_ERRNO - defined iff an arg `int *herrnop' is used.
+*/
+
+#define ENTNAME_r CONCAT(ENTNAME,_r)
+
+#include <paths.h>
+#define DBFILE _PATH_VARDB DATABASE
+
+#ifdef NEED_H_ERRNO
+#define H_ERRNO_PROTO , int *herrnop
+#define H_ERRNO_ARG , herrnop
+#define H_ERRNO_SET(val) (*herrnop = (val))
+#else
+#define H_ERRNO_PROTO
+#define H_ERRNO_ARG
+#define H_ERRNO_SET(val) ((void) 0)
+#endif
+
+/* 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 `getENTNAME'. */
+
+/* Open database file if not already opened. */
+static int
+internal_setent (int stayopen)
+{
+ int status = NSS_STATUS_SUCCESS;
+
+ if (db == NULL)
+ {
+ db = dbopen (DBFILE, 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. */
+int
+CONCAT(_nss_files_set,ENTNAME) (int stayopen)
+{
+ int 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. */
+int
+CONCAT(_nss_files_end,ENTNAME) (void)
+{
+ __libc_lock_lock (lock);
+
+ internal_endent ();
+
+ /* Reset STAYOPEN flag. */
+ keep_db = 0;
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+/* Do a database lookup for KEY. */
+static enum nss_status
+lookup (const DBT *key, struct STRUCTURE *result,
+ void *buffer, int buflen H_ERRNO_PROTO)
+{
+ enum nss_status status;
+ DBT value;
+
+ /* Open the database. */
+ internal_setent (keep_db);
+
+ /* Succeed iff it matches a value that parses correctly. */
+ status = (((*db->get) (db, key, &value, 0) == 0 &&
+ parse_line (value.data, result, buffer, buflen) == 0)
+ ? NSS_STATUS_SUCCESS : NSS_STATUS_NOTFOUND);
+
+ if (! keep_db)
+ internal_endent ();
+
+ return status;
+}
+
+
+/* Macro for defining lookup functions for this DB-based database.
+
+ NAME is the name of the lookup; e.g. `pwnam'.
+
+ KEYPATTERN gives `printf' args to construct a key string;
+ e.g. `(".%s", name)'.
+
+ KEYSIZE gives the allocation size of a buffer to construct it in;
+ e.g. `1 + strlen (name)'.
+
+ PROTO describes the arguments for the lookup key;
+ e.g. `const char *name'.
+
+ BREAK_IF_MATCH is ignored, but used by ../nss_files/files-XXX.c. */
+
+#define DB_LOOKUP(name, keysize, keypattern, break_if_match, proto...) \
+enum nss_status \
+_nss_files_get##name##_r (proto, \
+ struct STRUCTURE *result, \
+ char *buffer, int buflen H_ERRNO_PROTO) \
+{ \
+ DBT key; \
+ enum nss_status status; \
+ const size_t size = (keysize); \
+ key.data = __alloca (size); \
+ key.size = KEYPRINTF keypattern; \
+ __libc_lock_lock (lock); \
+ status = lookup (&key, result, buffer, buflen H_ERRNO_ARG); \
+ __libc_lock_unlock (lock); \
+ return status; \
+}
+
+#define KEYPRINTF(pattern, args...) snprintf (key.data, size, pattern ,##args)
+
+
+
+
+/* Return the next entry from the database file, doing locking. */
+enum nss_status
+CONCAT(_nss_files_get,ENTNAME_r) (struct STRUCTURE *result,
+ char *buffer, int buflen H_ERRNO_PROTO)
+{
+ /* 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 H_ERRNO_ARG);
+ __libc_lock_unlock (lock);
+
+ return status;
+}