diff options
Diffstat (limited to 'nss')
| -rw-r--r-- | nss/Makefile | 20 | ||||
| -rw-r--r-- | nss/nss_db/db-XXX.c | 203 | ||||
| -rw-r--r-- | nss/nss_files/files-XXX.c | 10 | ||||
| -rw-r--r-- | nss/nss_files/files-ethers.c | 9 | ||||
| -rw-r--r-- | nss/nss_files/files-grp.c | 16 | ||||
| -rw-r--r-- | nss/nss_files/files-hosts.c | 18 | ||||
| -rw-r--r-- | nss/nss_files/files-network.c | 6 | ||||
| -rw-r--r-- | nss/nss_files/files-parse.c | 21 | ||||
| -rw-r--r-- | nss/nss_files/files-proto.c | 8 | ||||
| -rw-r--r-- | nss/nss_files/files-pwd.c | 16 | ||||
| -rw-r--r-- | nss/nss_files/files-rpc.c | 8 | ||||
| -rw-r--r-- | nss/nss_files/files-service.c | 8 |
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; |