mirror of git://sourceware.org/git/glibc.git
140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <ctype.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <netdb.h>
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#include <libc-lock.h>
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#include <search.h>
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#include <stdio.h>
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#include <stdio_ext.h>
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#include <stdlib.h>
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#include <string.h>
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#include <aliases.h>
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#include <grp.h>
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#include <netinet/ether.h>
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#include <pwd.h>
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#include <shadow.h>
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#include <unistd.h>
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#if !defined DO_STATIC_NSS || defined SHARED
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# include <gnu/lib-names.h>
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#endif
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#include "nsswitch.h"
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#include "../nscd/nscd_proto.h"
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#include <sysdep.h>
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#include <config.h>
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/* Declare external database variables. */
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#define DEFINE_DATABASE(name) \
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nss_action_list __nss_##name##_database attribute_hidden; \
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weak_extern (__nss_##name##_database)
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#include "databases.def"
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#undef DEFINE_DATABASE
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#ifdef USE_NSCD
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/* Flags whether custom rules for database is set. */
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bool __nss_database_custom[NSS_DBSIDX_max];
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#endif
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/*__libc_lock_define_initialized (static, lock)*/
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/* -1 == not found
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0 == function found
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1 == finished */
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int
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__nss_lookup (nss_action_list *ni, const char *fct_name, const char *fct2_name,
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void **fctp)
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{
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*fctp = __nss_lookup_function (*ni, fct_name);
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if (*fctp == NULL && fct2_name != NULL)
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*fctp = __nss_lookup_function (*ni, fct2_name);
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while (*fctp == NULL
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&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
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&& (*ni)[1].module != NULL)
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{
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++(*ni);
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*fctp = __nss_lookup_function (*ni, fct_name);
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if (*fctp == NULL && fct2_name != NULL)
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*fctp = __nss_lookup_function (*ni, fct2_name);
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}
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return *fctp != NULL ? 0 : (*ni)[1].module == NULL ? 1 : -1;
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}
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libc_hidden_def (__nss_lookup)
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/* -1 == not found
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0 == adjusted for next function
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1 == finished */
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int
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__nss_next2 (nss_action_list *ni, const char *fct_name, const char *fct2_name,
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void **fctp, int status, int all_values)
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{
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if (all_values)
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{
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if (nss_next_action (*ni, NSS_STATUS_TRYAGAIN) == NSS_ACTION_RETURN
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&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_RETURN
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&& nss_next_action (*ni, NSS_STATUS_NOTFOUND) == NSS_ACTION_RETURN
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&& nss_next_action (*ni, NSS_STATUS_SUCCESS) == NSS_ACTION_RETURN)
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return 1;
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}
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else
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{
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/* This is really only for debugging. */
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if (__builtin_expect (NSS_STATUS_TRYAGAIN > status
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|| status > NSS_STATUS_RETURN, 0))
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__libc_fatal ("Illegal status in __nss_next.\n");
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if (nss_next_action (*ni, status) == NSS_ACTION_RETURN)
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return 1;
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}
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if ((*ni)[1].module == NULL)
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return -1;
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do
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{
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++(*ni);
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*fctp = __nss_lookup_function (*ni, fct_name);
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if (*fctp == NULL && fct2_name != NULL)
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*fctp = __nss_lookup_function (*ni, fct2_name);
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}
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while (*fctp == NULL
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&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
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&& (*ni)[1].module != NULL);
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return *fctp != NULL ? 0 : -1;
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}
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libc_hidden_def (__nss_next2)
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void *
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__nss_lookup_function (nss_action_list ni, const char *fct_name)
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{
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if (ni->module == NULL)
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return NULL;
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return __nss_module_get_function (ni->module, fct_name);
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}
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libc_hidden_def (__nss_lookup_function)
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