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-rw-r--r--nss/Makefile20
-rw-r--r--nss/nss_db/db-XXX.c203
-rw-r--r--nss/nss_files/files-XXX.c10
-rw-r--r--nss/nss_files/files-ethers.c9
-rw-r--r--nss/nss_files/files-grp.c16
-rw-r--r--nss/nss_files/files-hosts.c18
-rw-r--r--nss/nss_files/files-network.c6
-rw-r--r--nss/nss_files/files-parse.c21
-rw-r--r--nss/nss_files/files-proto.c8
-rw-r--r--nss/nss_files/files-pwd.c16
-rw-r--r--nss/nss_files/files-rpc.c8
-rw-r--r--nss/nss_files/files-service.c8
12 files changed, 286 insertions, 57 deletions
diff --git a/nss/Makefile b/nss/Makefile
index 8e7a242..4ab774a 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -31,7 +31,7 @@ routines = nsswitch $(addsuffix -lookup,$(databases))
databases = proto service hosts network grp pwd rpc ethers
# Specify rules for the nss_* modules. We have some services.
-services := files dns
+services := files dns db
extra-libs = $(services:%=libnss_%)
@@ -45,12 +45,26 @@ distribute += files-XXX.c files-parse.c
libnss_dns-routines := dns-host dns-network
+libnss_db-routines := $(addprefix db-,$(filter-out hosts network,\
+ $(databases)))
+distribute += db-XXX.c
+
libnss_files-inhibit-o = $(filter-out .so,$(object-suffixes))
libnss_dns-inhibit-o = $(filter-out .so,$(object-suffixes))
+libnss_db-inhibit-o = $(filter-out .so,$(object-suffixes))
include ../Rules
-resobjdir := $(firstword $(objdir) $(patsubst ../$(subdir),.,$(..)resolv))
-LDLIBS-nss_dns.so = -L$(resobjdir) -Wl,-rpath-link=$(resobjdir) -lresolv
+$(objpfx)libnss_dns.so: $(firstword $(objdir) $(..)resolv)/libresolv.so
+
+$(objpfx)libnss_db.so: $(firstword $(objdir) $(..)db)/libdb.so \
+ $(objpfx)libnss_files.so
+
+$(libnss_db-routines:%=$(objpfx)%.c): $(objpfx)db-%.c: nss_files/files-%.c
+ @rm -f $@.new
+ (echo '#define EXTERN_PARSER';\
+ echo '#define GENERIC "../nss_db/db-XXX.c"';\
+ echo '#include <$<>') > $@.new
+ mv -f $@.new $@
diff --git a/nss/nss_db/db-XXX.c b/nss/nss_db/db-XXX.c
new file mode 100644
index 0000000..3f6f35d
--- /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;
+}
diff --git a/nss/nss_files/files-XXX.c b/nss/nss_files/files-XXX.c
index b9c3579..7fa87c0 100644
--- a/nss/nss_files/files-XXX.c
+++ b/nss/nss_files/files-XXX.c
@@ -27,13 +27,15 @@ Cambridge, MA 02139, USA. */
ENTNAME -- database name of the structure and functions (hostent, pwent).
STRUCTURE -- struct name, define only if not ENTNAME (passwd, group).
- DATAFILE -- string of the database file's name.
+ DATABASE -- string of the database file's name ("hosts", "passwd").
NEED_H_ERRNO - defined iff an arg `int *herrnop' is used.
MIDLINE_COMMENTS - defined iff # before \n terminates a database line.
*/
-#define ENTNAME_r CONCAT(ENTNAME,_r)
+#define ENTNAME_r CONCAT(ENTNAME,_r)
+
+#define DATAFILE "/etc/" DATABASE
#ifdef NEED_H_ERRNO
#define H_ERRNO_PROTO , int *herrnop
@@ -194,13 +196,15 @@ CONCAT(_nss_files_get,ENTNAME_r) (struct STRUCTURE *result,
NAME is the name of the lookup; e.g. `hostbyname'.
+ KEYSIZE and KEYPATTERN are ignored here but used by ../nss_db/db-XXX.c.
+
PROTO describes the arguments for the lookup key;
e.g. `const char *hostname'.
BREAK_IF_MATCH is a block of code which compares `struct STRUCTURE *result'
to the lookup key arguments and does `break;' if they match. */
-#define DB_LOOKUP(name, break_if_match, proto...) \
+#define DB_LOOKUP(name, keysize, keypattern, break_if_match, proto...) \
enum nss_status \
_nss_files_get##name##_r (proto, \
struct STRUCTURE *result, \
diff --git a/nss/nss_files/files-ethers.c b/nss/nss_files/files-ethers.c
index b66a3c3..70f7d07 100644
--- a/nss/nss_files/files-ethers.c
+++ b/nss/nss_files/files-ethers.c
@@ -30,7 +30,7 @@ struct etherent
struct etherent_data {};
#define ENTNAME etherent
-#define DATAFILE "/etc/ethers"
+#define DATABASE "ethers"
#include "files-parse.c"
LINE_PARSER
("#",
@@ -56,15 +56,16 @@ LINE_PARSER
)
-#include "files-XXX.c"
+#include GENERIC
-DB_LOOKUP (hostton,
+DB_LOOKUP (hostton, 1 + strlen (name), (".%s", name),
{
if (strcmp (result->e_name, name) == 0)
break;
}, const char *name)
-DB_LOOKUP (ntohost,
+DB_LOOKUP (ntohost, 7, ("=%c%c%c%c%c%c",
+ addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]),
{
if (memcmp (&result->e_addr, addr,
sizeof (struct ether_addr)) == 0)
diff --git a/nss/nss_files/files-grp.c b/nss/nss_files/files-grp.c
index 580dfbe..8e047b6 100644
--- a/nss/nss_files/files-grp.c
+++ b/nss/nss_files/files-grp.c
@@ -21,26 +21,22 @@ Cambridge, MA 02139, USA. */
#define STRUCTURE group
#define ENTNAME grent
-#define DATAFILE "/etc/group"
+#define DATABASE "group"
struct grent_data {};
-#define TRAILING_LIST_MEMBER gr_mem
-#define TRAILING_LIST_SEPARATOR_P(c) ((c) == ',')
-#include "files-parse.c"
/* Our parser function is already defined in fgetgrent.c, so use that.
to parse lines from the database file. */
-extern int parse_line (char *line, struct STRUCTURE *result,
- void *buffer, int buflen);
-
-#include "files-XXX.c"
+#define EXTERN_PARSER
+#include "files-parse.c"
+#include GENERIC
-DB_LOOKUP (grnam,
+DB_LOOKUP (grnam, 1 + strlen (name), (".%s", name),
{
if (! strcmp (name, result->gr_name))
break;
}, const char *name)
-DB_LOOKUP (grgid,
+DB_LOOKUP (grgid, 20, ("=%lu", (unsigned long int) gid),
{
if (result->gr_gid == gid)
break;
diff --git a/nss/nss_files/files-hosts.c b/nss/nss_files/files-hosts.c
index 19a0075..bc9eaa3 100644
--- a/nss/nss_files/files-hosts.c
+++ b/nss/nss_files/files-hosts.c
@@ -30,7 +30,7 @@ Cambridge, MA 02139, USA. */
#define ENTNAME hostent
-#define DATAFILE _PATH_HOSTS
+#define DATABASE "hosts"
#define ENTDATA hostent_data
struct hostent_data
@@ -93,19 +93,11 @@ LINE_PARSER
#include "files-XXX.c"
-DB_LOOKUP (hostbyname,
- {
- char **ap;
- if (! strcmp (name, result->h_name))
- break;
- for (ap = result->h_aliases; *ap; ++ap)
- if (! strcmp (name, *ap))
- break;
- if (*ap)
- break;
- }, const char *name)
+DB_LOOKUP (hostbyname, ,,
+ LOOKUP_NAME (h_name, h_aliases),
+ const char *name)
-DB_LOOKUP (hostbyaddr,
+DB_LOOKUP (hostbyaddr, ,,
{
if (result->h_addrtype == type && result->h_length == len &&
! memcmp (addr, result->h_addr_list[0], len))
diff --git a/nss/nss_files/files-network.c b/nss/nss_files/files-network.c
index c6cd718..acfbc31 100644
--- a/nss/nss_files/files-network.c
+++ b/nss/nss_files/files-network.c
@@ -22,7 +22,7 @@ Cambridge, MA 02139, USA. */
#include <netdb.h>
#define ENTNAME netent
-#define DATAFILE _PATH_NETWORKS
+#define DATABASE "networks"
struct netent_data {};
@@ -43,11 +43,11 @@ LINE_PARSER
#include "files-XXX.c"
-DB_LOOKUP (netbyname,
+DB_LOOKUP (netbyname, ,,
LOOKUP_NAME (n_name, n_aliases),
const char *name)
-DB_LOOKUP (netbyaddr,
+DB_LOOKUP (netbyaddr, ,,
{
if (result->n_addrtype == type && result->n_net == net)
/* Bingo! */
diff --git a/nss/nss_files/files-parse.c b/nss/nss_files/files-parse.c
index a9c461e..8930780 100644
--- a/nss/nss_files/files-parse.c
+++ b/nss/nss_files/files-parse.c
@@ -52,6 +52,19 @@ struct parser_data
#define parse_line CONCAT(_nss_files_parse_,ENTNAME)
#endif
+
+#ifdef EXTERN_PARSER
+
+/* The parser is defined in a different module. */
+extern int parse_line (char *line, struct STRUCTURE *result,
+ struct parser_data *data, int datalen);
+
+#define LINE_PARSER(EOLSET, BODY) /* Do nothing */
+
+#else
+
+/* Define a line parsing function. */
+
#define LINE_PARSER(EOLSET, BODY) \
parser_stclass int \
parse_line (char *line, struct STRUCTURE *result, \
@@ -167,6 +180,9 @@ parse_list (char *line, struct parser_data *data, int datalen)
return list;
}
+#endif /* EXTERN_PARSER */
+
+
#define LOOKUP_NAME(nameelt, aliaselt) \
{ \
char **ap; \
@@ -180,3 +196,8 @@ parse_list (char *line, struct parser_data *data, int datalen)
}
#endif
+
+/* This is defined by db-*.c to include "../nss_db/db-XXX.c" instead. */
+#ifndef GENERIC
+#define GENERIC "files-XXX.c"
+#endif
diff --git a/nss/nss_files/files-proto.c b/nss/nss_files/files-proto.c
index ef5a7c2..3cc14e7 100644
--- a/nss/nss_files/files-proto.c
+++ b/nss/nss_files/files-proto.c
@@ -21,7 +21,7 @@ Cambridge, MA 02139, USA. */
#define ENTNAME protoent
-#define DATAFILE _PATH_PROTOCOLS
+#define DATABASE "protocols"
struct protoent_data {};
@@ -34,13 +34,13 @@ LINE_PARSER
INT_FIELD (result->p_proto, isspace, 1, 10,);
)
-#include "files-XXX.c"
+#include GENERIC
-DB_LOOKUP (protobyname,
+DB_LOOKUP (protobyname, 1 + strlen (name), (".%s", name),
LOOKUP_NAME (p_name, p_aliases),
const char *name)
-DB_LOOKUP (protobynumber,
+DB_LOOKUP (protobynumber, 20, ("=%d", proto),
{
if (result->p_proto == proto)
break;
diff --git a/nss/nss_files/files-pwd.c b/nss/nss_files/files-pwd.c
index 6b39116..9732bc6 100644
--- a/nss/nss_files/files-pwd.c
+++ b/nss/nss_files/files-pwd.c
@@ -21,24 +21,22 @@ Cambridge, MA 02139, USA. */
#define STRUCTURE passwd
#define ENTNAME pwent
-#define DATAFILE "/etc/passwd"
+#define DATABASE "passwd"
struct pwent_data {};
-#include "files-parse.c"
-/* Our parser function is already defined in fgetpwent.c, so use that.
+/* Our parser function is already defined in fgetpwent.c, so use that
to parse lines from the database file. */
-extern int parse_line (char *line, struct STRUCTURE *result,
- void *buffer, int buflen);
-
-#include "files-XXX.c"
+#define EXTERN_PARSER
+#include "files-parse.c"
+#include GENERIC
-DB_LOOKUP (pwnam,
+DB_LOOKUP (pwnam, 1 + strlen (name), (".%s", name),
{
if (! strcmp (name, result->pw_name))
break;
}, const char *name)
-DB_LOOKUP (pwuid,
+DB_LOOKUP (pwuid, 20, ("=%lu", (unsigned long int) uid),
{
if (result->pw_uid == uid)
break;
diff --git a/nss/nss_files/files-rpc.c b/nss/nss_files/files-rpc.c
index f8bef45..0ad1e21 100644
--- a/nss/nss_files/files-rpc.c
+++ b/nss/nss_files/files-rpc.c
@@ -21,7 +21,7 @@ Cambridge, MA 02139, USA. */
#define ENTNAME rpcent
-#define DATAFILE "/etc/rpc"
+#define DATABASE "rpc"
struct rpcent_data {};
@@ -34,13 +34,13 @@ LINE_PARSER
INT_FIELD (result->r_number, isspace, 1, 10,);
)
-#include "files-XXX.c"
+#include GENERIC
-DB_LOOKUP (rpcbyname,
+DB_LOOKUP (rpcbyname, 1 + strlen (name), (".%s", name),
LOOKUP_NAME (r_name, r_aliases),
const char *name)
-DB_LOOKUP (rpcbynumber,
+DB_LOOKUP (rpcbynumber, 20, ("=%d", number),
{
if (result->r_number == number)
break;
diff --git a/nss/nss_files/files-service.c b/nss/nss_files/files-service.c
index f0dba50..5dea476 100644
--- a/nss/nss_files/files-service.c
+++ b/nss/nss_files/files-service.c
@@ -22,7 +22,7 @@ Cambridge, MA 02139, USA. */
#define ENTNAME servent
-#define DATAFILE _PATH_SERVICES
+#define DATABASE "services"
struct servent_data {};
@@ -37,13 +37,13 @@ LINE_PARSER
STRING_FIELD (result->s_proto, isspace, 1);
)
-#include "files-XXX.c"
+#include GENERIC
-DB_LOOKUP (servbyname,
+DB_LOOKUP (servbyname, 1 + strlen (name), (".%s", name),
LOOKUP_NAME (s_name, s_aliases),
const char *name)
-DB_LOOKUP (servbyport,
+DB_LOOKUP (servbyport, 20, ("=%d", port),
{
if (result->s_port == port)
break;