-/* Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
-Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+/* Copyright (C) 1996-2018 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 free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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.
+ 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
+ Lesser 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. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <ctype.h>
#include <dlfcn.h>
+#include <errno.h>
#include <netdb.h>
#include <libc-lock.h>
#include <search.h>
#include <stdio.h>
+#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>
+#include <aliases.h>
+#include <grp.h>
+#include <netinet/ether.h>
+#include <pwd.h>
+#include <shadow.h>
+
+#if !defined DO_STATIC_NSS || defined SHARED
+# include <gnu/lib-names.h>
+#endif
+
#include "nsswitch.h"
-#include "../elf/link.h" /* We need some help from ld.so. */
+#include "../nscd/nscd_proto.h"
+#include <sysdep.h>
+#include <config.h>
+
+#ifdef LINK_OBSOLETE_NSL
+# define DEFAULT_CONFIG "compat [NOTFOUND=return] files"
+# define DEFAULT_DEFCONFIG "nis [NOTFOUND=return] files"
+#else
+# define DEFAULT_CONFIG "files"
+# define DEFAULT_DEFCONFIG "files"
+#endif
/* Prototypes for the local functions. */
-static void nss_init (void);
-static void *nss_lookup_function (service_user *ni, const char *fct_name);
static name_database *nss_parse_file (const char *fname);
static name_database_entry *nss_getline (char *line);
static service_user *nss_parse_service_list (const char *line);
+#if !defined DO_STATIC_NSS || defined SHARED
static service_library *nss_new_service (name_database *database,
const char *name);
+#endif
-__libc_lock_define_initialized (static, lock)
+/* Declare external database variables. */
+#define DEFINE_DATABASE(name) \
+ service_user *__nss_##name##_database attribute_hidden; \
+ weak_extern (__nss_##name##_database)
+#include "databases.def"
+#undef DEFINE_DATABASE
+/* Structure to map database name to variable. */
+static const struct
+{
+ const char name[10];
+ service_user **dbp;
+} databases[] =
+{
+#define DEFINE_DATABASE(name) \
+ { #name, &__nss_##name##_database },
+#include "databases.def"
+#undef DEFINE_DATABASE
+};
+#define ndatabases (sizeof (databases) / sizeof (databases[0]))
-/* Nonzero if the sevices are already initialized. */
-static int nss_initialized;
+#ifdef USE_NSCD
+/* Flags whether custom rules for database is set. */
+bool __nss_database_custom[NSS_DBSIDX_max];
+#endif
+__libc_lock_define_initialized (static, lock)
+
+#if !defined DO_STATIC_NSS || defined SHARED
+/* String with revision number of the shared object files. */
+static const char *const __nss_shlib_revision = LIBNSS_FILES_SO + 15;
+#endif
+
/* The root of the whole data base. */
static name_database *service_table;
+/* List of default service lists that were generated by glibc because
+ /etc/nsswitch.conf did not provide a value.
+ The list is only maintained so we can free such service lists in
+ __libc_freeres. */
+static name_database_entry *defconfig_entries;
-static void
-nss_init (void)
-{
- /* Prevent multiple threads to change the service table. */
- __libc_lock_lock (lock);
-
- if (service_table == NULL)
- service_table = nss_parse_file (_PATH_NSSWITCH_CONF);
- __libc_lock_unlock (lock);
-}
+#if defined USE_NSCD && (!defined DO_STATIC_NSS || defined SHARED)
+/* Nonzero if this is the nscd process. */
+static bool is_nscd;
+/* The callback passed to the init functions when nscd is used. */
+static void (*nscd_init_cb) (size_t, struct traced_file *);
+#endif
/* -1 == database not found
0 == database entry pointer stored */
int
-__nss_database_lookup (const char *database, const char *defconfig,
- service_user **ni)
+__nss_database_lookup (const char *database, const char *alternate_name,
+ const char *defconfig, service_user **ni)
{
- name_database_entry *entry;
+ /* Prevent multiple threads to change the service table. */
+ __libc_lock_lock (lock);
- if (nss_initialized == 0)
- nss_init ();
+ /* Reconsider database variable in case some other thread called
+ `__nss_configure_lookup' while we waited for the lock. */
+ if (*ni != NULL)
+ {
+ __libc_lock_unlock (lock);
+ return 0;
+ }
+
+ /* Are we initialized yet? */
+ if (service_table == NULL)
+ /* Read config file. */
+ service_table = nss_parse_file (_PATH_NSSWITCH_CONF);
/* Test whether configuration data is available. */
- if (service_table)
+ if (service_table != NULL)
{
- /* Return first `service_user' entry for DATABASE.
- XXX Will use perfect hashing function for known databases. */
+ /* Return first `service_user' entry for DATABASE. */
+ name_database_entry *entry;
/* XXX Could use some faster mechanism here. But each database is
only requested once and so this might not be critical. */
for (entry = service_table->entry; entry != NULL; entry = entry->next)
if (strcmp (database, entry->name) == 0)
- {
+ *ni = entry->service;
+
+ if (*ni == NULL && alternate_name != NULL)
+ /* We haven't found an entry so far. Try to find it with the
+ alternative name. */
+ for (entry = service_table->entry; entry != NULL; entry = entry->next)
+ if (strcmp (alternate_name, entry->name) == 0)
*ni = entry->service;
- return 0;
- }
}
/* No configuration data is available, either because nsswitch.conf
- doesn't exist or because it doesn't have a line for this database. */
- entry = malloc (sizeof *entry);
- if (entry == NULL)
- return -1;
- entry->name = database;
- /* DEFCONFIG specifies the default service list for this database,
+ doesn't exist or because it doesn't have a line for this database.
+
+ DEFCONFIG specifies the default service list for this database,
or null to use the most common default. */
- entry->service = nss_parse_service_list (defconfig ?:
- "compat [NOTFOUND=return] files");
+ if (*ni == NULL)
+ {
+ *ni = nss_parse_service_list (defconfig ?: DEFAULT_DEFCONFIG);
+ if (*ni != NULL)
+ {
+ /* Record the memory we've just allocated in defconfig_entries list,
+ so we can free it later. */
+ name_database_entry *entry;
- *ni = entry->service;
- return 0;
+ /* Allocate ENTRY plus size of name (1 here). */
+ entry = (name_database_entry *) malloc (sizeof (*entry) + 1);
+
+ if (entry != NULL)
+ {
+ entry->next = defconfig_entries;
+ entry->service = *ni;
+ entry->name[0] = '\0';
+ defconfig_entries = entry;
+ }
+ }
+ }
+
+ __libc_lock_unlock (lock);
+
+ return *ni != NULL ? 0 : -1;
}
+libc_hidden_def (__nss_database_lookup)
/* -1 == not found
- 0 == adjusted for next function */
+ 0 == function found
+ 1 == finished */
int
-__nss_lookup (service_user **ni, const char *fct_name, void **fctp)
+__nss_lookup (service_user **ni, const char *fct_name, const char *fct2_name,
+ void **fctp)
{
- *fctp = nss_lookup_function (*ni, fct_name);
+ *fctp = __nss_lookup_function (*ni, fct_name);
+ if (*fctp == NULL && fct2_name != NULL)
+ *fctp = __nss_lookup_function (*ni, fct2_name);
while (*fctp == NULL
&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
{
*ni = (*ni)->next;
- *fctp = nss_lookup_function (*ni, fct_name);
+ *fctp = __nss_lookup_function (*ni, fct_name);
+ if (*fctp == NULL && fct2_name != NULL)
+ *fctp = __nss_lookup_function (*ni, fct2_name);
}
- return *fctp != NULL ? 0 : -1;
+ return *fctp != NULL ? 0 : (*ni)->next == NULL ? 1 : -1;
}
+libc_hidden_def (__nss_lookup)
/* -1 == not found
0 == adjusted for next function
1 == finished */
int
-__nss_next (service_user **ni, const char *fct_name, void **fctp, int status,
- int all_values)
+__nss_next2 (service_user **ni, const char *fct_name, const char *fct2_name,
+ void **fctp, int status, int all_values)
{
if (all_values)
{
else
{
/* This is really only for debugging. */
- if (NSS_STATUS_TRYAGAIN > status || status > NSS_STATUS_SUCCESS)
- __libc_fatal ("illegal status in " __FUNCTION__);
+ if (__builtin_expect (NSS_STATUS_TRYAGAIN > status
+ || status > NSS_STATUS_RETURN, 0))
+ __libc_fatal ("illegal status in __nss_next");
if (nss_next_action (*ni, status) == NSS_ACTION_RETURN)
return 1;
{
*ni = (*ni)->next;
- *fctp = nss_lookup_function (*ni, fct_name);
+ *fctp = __nss_lookup_function (*ni, fct_name);
+ if (*fctp == NULL && fct2_name != NULL)
+ *fctp = __nss_lookup_function (*ni, fct2_name);
}
while (*fctp == NULL
&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
return *fctp != NULL ? 0 : -1;
}
+libc_hidden_def (__nss_next2)
-static int
-nss_dlerror_run (void (*operate) (void))
+int
+attribute_compat_text_section
+__nss_next (service_user **ni, const char *fct_name, void **fctp, int status,
+ int all_values)
+{
+ return __nss_next2 (ni, fct_name, NULL, fctp, status, all_values);
+}
+
+
+int
+__nss_configure_lookup (const char *dbname, const char *service_line)
{
- const char *last_errstring = NULL;
- const char *last_object_name = NULL;
+ service_user *new_db;
+ size_t cnt;
- (void) _dl_catch_error (&last_errstring, &last_object_name, operate);
+ for (cnt = 0; cnt < ndatabases; ++cnt)
+ {
+ int cmp = strcmp (dbname, databases[cnt].name);
+ if (cmp == 0)
+ break;
+ if (cmp < 0)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+ }
- return last_errstring != NULL;
+ if (cnt == ndatabases)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ /* Test whether it is really used. */
+ if (databases[cnt].dbp == NULL)
+ /* Nothing to do, but we could do. */
+ return 0;
+
+ /* Try to generate new data. */
+ new_db = nss_parse_service_list (service_line);
+ if (new_db == NULL)
+ {
+ /* Illegal service specification. */
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ /* Prevent multiple threads to change the service table. */
+ __libc_lock_lock (lock);
+
+ /* Install new rules. */
+ *databases[cnt].dbp = new_db;
+#ifdef USE_NSCD
+ __nss_database_custom[cnt] = true;
+#endif
+
+ __libc_lock_unlock (lock);
+
+ return 0;
}
}
-static void *
-nss_lookup_function (service_user *ni, const char *fct_name)
+#if !defined DO_STATIC_NSS || defined SHARED
+/* Load library. */
+static int
+nss_load_library (service_user *ni)
+{
+ if (ni->library == NULL)
+ {
+ /* This service has not yet been used. Fetch the service
+ library for it, creating a new one if need be. If there
+ is no service table from the file, this static variable
+ holds the head of the service_library list made from the
+ default configuration. */
+ static name_database default_table;
+ ni->library = nss_new_service (service_table ?: &default_table,
+ ni->name);
+ if (ni->library == NULL)
+ return -1;
+ }
+
+ if (ni->library->lib_handle == NULL)
+ {
+ /* Load the shared library. */
+ size_t shlen = (7 + strlen (ni->name) + 3
+ + strlen (__nss_shlib_revision) + 1);
+ int saved_errno = errno;
+ char shlib_name[shlen];
+
+ /* Construct shared object name. */
+ __stpcpy (__stpcpy (__stpcpy (__stpcpy (shlib_name,
+ "libnss_"),
+ ni->name),
+ ".so"),
+ __nss_shlib_revision);
+
+ ni->library->lib_handle = __libc_dlopen (shlib_name);
+ if (ni->library->lib_handle == NULL)
+ {
+ /* Failed to load the library. */
+ ni->library->lib_handle = (void *) -1l;
+ __set_errno (saved_errno);
+ }
+# ifdef USE_NSCD
+ else if (is_nscd)
+ {
+ /* Call the init function when nscd is used. */
+ size_t initlen = (5 + strlen (ni->name)
+ + strlen ("_init") + 1);
+ char init_name[initlen];
+
+ /* Construct the init function name. */
+ __stpcpy (__stpcpy (__stpcpy (init_name,
+ "_nss_"),
+ ni->name),
+ "_init");
+
+ /* Find the optional init function. */
+ void (*ifct) (void (*) (size_t, struct traced_file *))
+ = __libc_dlsym (ni->library->lib_handle, init_name);
+ if (ifct != NULL)
+ {
+ void (*cb) (size_t, struct traced_file *) = nscd_init_cb;
+# ifdef PTR_DEMANGLE
+ PTR_DEMANGLE (cb);
+# endif
+ ifct (cb);
+ }
+ }
+# endif
+ }
+
+ return 0;
+}
+#endif
+
+
+void *
+__nss_lookup_function (service_user *ni, const char *fct_name)
{
void **found, *result;
enough to a pointer to our structure to use as a lookup key that
will be passed to `known_compare' (above). */
- found = __tsearch (&fct_name, (void **) &ni->known, &known_compare);
- if (*found != &fct_name)
- /* The search found an existing structure in the tree. */
- result = ((known_function *) *found)->fct_ptr;
+ found = __tsearch (&fct_name, &ni->known, &known_compare);
+ if (found == NULL)
+ /* This means out-of-memory. */
+ result = NULL;
+ else if (*found != &fct_name)
+ {
+ /* The search found an existing structure in the tree. */
+ result = ((known_function *) *found)->fct_ptr;
+#ifdef PTR_DEMANGLE
+ PTR_DEMANGLE (result);
+#endif
+ }
else
{
/* This name was not known before. Now we have a node in the tree
known_function *known = malloc (sizeof *known);
if (! known)
{
+#if !defined DO_STATIC_NSS || defined SHARED
remove_from_tree:
+#endif
/* Oops. We can't instantiate this node properly.
Remove it from the tree. */
- __tdelete (&fct_name, (void **) &ni->known, &known_compare);
+ __tdelete (&fct_name, &ni->known, &known_compare);
+ free (known);
result = NULL;
}
else
*found = known;
known->fct_name = fct_name;
- if (ni->library == NULL)
- {
- /* This service has not yet been used. Fetch the service
- library for it, creating a new one if need be. If there
- is no service table from the file, this static variable
- holds the head of the service_library list made from the
- default configuration. */
- static name_database default_table;
- ni->library = nss_new_service (service_table ?: &default_table,
- ni->name);
- if (ni->library == NULL)
- {
- /* This only happens when out of memory. */
- free (known);
- goto remove_from_tree;
- }
- }
-
- if (ni->library->lib_handle == NULL)
- {
- /* Load the shared library. */
- size_t shlen = (7 + strlen (ni->library->name) + 3
- + sizeof (NSS_SHLIB_REVISION));
- char shlib_name[shlen];
-
- void do_open (void)
- {
- /* Open and relocate the shared object. */
- ni->library->lib_handle = _dl_open (shlib_name, RTLD_LAZY);
- }
-
- /* Construct shared object name. */
- __stpcpy (__stpcpy (__stpcpy (shlib_name, "libnss_"),
- ni->library->name),
- ".so" NSS_SHLIB_REVISION);
+#if !defined DO_STATIC_NSS || defined SHARED
+ /* Load the appropriate library. */
+ if (nss_load_library (ni) != 0)
+ /* This only happens when out of memory. */
+ goto remove_from_tree;
- if (nss_dlerror_run (do_open) != 0)
- /* Failed to load the library. */
- ni->library->lib_handle = (void *) -1;
- }
-
- if (ni->library->lib_handle == (void *) -1)
+ if (ni->library->lib_handle == (void *) -1l)
/* Library not found => function not found. */
result = NULL;
else
{
- /* Get the desired function. Again, GNU ld.so magic ahead. */
- size_t namlen = (5 + strlen (ni->library->name) + 1
+ /* Get the desired function. */
+ size_t namlen = (5 + strlen (ni->name) + 1
+ strlen (fct_name) + 1);
char name[namlen];
- struct link_map *map = ni->library->lib_handle;
- ElfW(Addr) loadbase;
- const ElfW(Sym) *ref = NULL;
- void get_sym (void)
- {
- struct link_map *scope[2] = { map, NULL };
- loadbase = _dl_lookup_symbol (name, &ref,
- scope, map->l_name, 0, 0);
- }
/* Construct the function name. */
__stpcpy (__stpcpy (__stpcpy (__stpcpy (name, "_nss_"),
- ni->library->name),
+ ni->name),
"_"),
fct_name);
/* Look up the symbol. */
- result = (nss_dlerror_run (get_sym)
- ? NULL : (void *) (loadbase + ref->st_value));
+ result = __libc_dlsym (ni->library->lib_handle, name);
}
+#else
+ /* We can't get function address dynamically in static linking. */
+ {
+# define DEFINE_ENT(h,nm) \
+ { #h"_get"#nm"ent_r", _nss_##h##_get##nm##ent_r }, \
+ { #h"_end"#nm"ent", _nss_##h##_end##nm##ent }, \
+ { #h"_set"#nm"ent", _nss_##h##_set##nm##ent },
+# define DEFINE_GET(h,nm) \
+ { #h"_get"#nm"_r", _nss_##h##_get##nm##_r },
+# define DEFINE_GETBY(h,nm,ky) \
+ { #h"_get"#nm"by"#ky"_r", _nss_##h##_get##nm##by##ky##_r },
+ static struct fct_tbl { const char *fname; void *fp; } *tp, tbl[] =
+ {
+# include "function.def"
+ { NULL, NULL }
+ };
+ size_t namlen = (5 + strlen (ni->name) + 1
+ + strlen (fct_name) + 1);
+ char name[namlen];
+
+ /* Construct the function name. */
+ __stpcpy (__stpcpy (__stpcpy (name, ni->name),
+ "_"),
+ fct_name);
+
+ result = NULL;
+ for (tp = &tbl[0]; tp->fname; tp++)
+ if (strcmp (tp->fname, name) == 0)
+ {
+ result = tp->fp;
+ break;
+ }
+ }
+#endif
/* Remember function pointer for later calls. Even if null, we
record it so a second try needn't search the library again. */
known->fct_ptr = result;
+#ifdef PTR_MANGLE
+ PTR_MANGLE (known->fct_ptr);
+#endif
}
}
return result;
}
+libc_hidden_def (__nss_lookup_function)
static name_database *
size_t len;
/* Open the configuration file. */
- fp = fopen (fname, "r");
+ fp = fopen (fname, "rce");
if (fp == NULL)
return NULL;
+ /* No threads use this stream. */
+ __fsetlocking (fp, FSETLOCKING_BYCALLER);
+
result = (name_database *) malloc (sizeof (name_database));
if (result == NULL)
- return NULL;
+ {
+ fclose (fp);
+ return NULL;
+ }
result->entry = NULL;
result->library = NULL;
{
name_database_entry *this;
ssize_t n;
- char *cp;
n = __getline (&line, &len, fp);
if (n < 0)
/* Because the file format does not know any form of quoting we
can search forward for the next '#' character and if found
make it terminating the line. */
- cp = strchr (line, '#');
- if (cp != NULL)
- *cp = '\0';
+ *__strchrnul (line, '#') = '\0';
/* If the line is blank it is ignored. */
if (line[0] == '\0')
last = this;
}
}
- while (!feof (fp));
+ while (!__feof_unlocked (fp));
/* Free the buffer. */
free (line);
}
-/* Read the source names: `<source> ( "[" <status> "=" <action> "]" )*'. */
+/* Read the source names:
+ `( <source> ( "[" "!"? (<status> "=" <action> )+ "]" )? )*'
+ */
static service_user *
nss_parse_service_list (const char *line)
{
return result;
- new_service = (service_user *) malloc (sizeof (service_user));
+ new_service = (service_user *) malloc (sizeof (service_user)
+ + (line - name + 1));
if (new_service == NULL)
return result;
- else
- {
- char *source = (char *) malloc (line - name + 1);
- if (source == NULL)
- {
- free (new_service);
- return result;
- }
- memcpy (source, name, line - name);
- source[line - name] = '\0';
- new_service->name = source;
- }
+ *((char *) __mempcpy (new_service->name, name, line - name)) = '\0';
/* Set default actions. */
new_service->actions[2 + NSS_STATUS_TRYAGAIN] = NSS_ACTION_CONTINUE;
new_service->actions[2 + NSS_STATUS_UNAVAIL] = NSS_ACTION_CONTINUE;
new_service->actions[2 + NSS_STATUS_NOTFOUND] = NSS_ACTION_CONTINUE;
new_service->actions[2 + NSS_STATUS_SUCCESS] = NSS_ACTION_RETURN;
+ new_service->actions[2 + NSS_STATUS_RETURN] = NSS_ACTION_RETURN;
new_service->library = NULL;
new_service->known = NULL;
new_service->next = NULL;
lookup_actions action;
/* Grok ! before name to mean all statii but that one. */
- if (not = line[0] == '!')
+ not = line[0] == '!';
+ if (not)
++line;
/* Read status name. */
else if (__strncasecmp (name, "UNAVAIL", 7) == 0)
status = NSS_STATUS_UNAVAIL;
else
- return result;
+ goto finish;
}
else if (line - name == 8)
{
else if (__strncasecmp (name, "TRYAGAIN", 8) == 0)
status = NSS_STATUS_TRYAGAIN;
else
- return result;
+ goto finish;
}
else
- return result;
+ goto finish;
while (isspace (line[0]))
++line;
if (line[0] != '=')
- return result;
+ goto finish;
do
++line;
while (isspace (line[0]));
else if (line - name == 8
&& __strncasecmp (name, "CONTINUE", 8) == 0)
action = NSS_ACTION_CONTINUE;
+ else if (line - name == 5
+ && __strncasecmp (name, "MERGE", 5) == 0)
+ action = NSS_ACTION_MERGE;
else
- return result;
+ goto finish;
if (not)
{
*nextp = new_service;
nextp = &new_service->next;
+ continue;
+
+ finish:
+ free (new_service);
+ return result;
}
}
{
const char *name;
name_database_entry *result;
+ size_t len;
/* Ignore leading white spaces. ATTENTION: this is different from
what is implemented in Solaris. The Solaris man page says a line
return NULL;
*line++ = '\0';
- result = (name_database_entry *) malloc (sizeof (name_database_entry));
+ len = strlen (name) + 1;
+
+ result = (name_database_entry *) malloc (sizeof (name_database_entry) + len);
if (result == NULL)
return NULL;
/* Save the database name. */
- {
- const size_t len = strlen (name) + 1;
- char *new = malloc (len);
- if (new == NULL)
- {
- free (result);
- return NULL;
- }
- result->name = memcpy (new, name, len);
- }
+ memcpy (result->name, name, len);
/* Parse the list of services. */
result->service = nss_parse_service_list (line);
}
+#if !defined DO_STATIC_NSS || defined SHARED
static service_library *
nss_new_service (name_database *database, const char *name)
{
return *currentp;
}
+#endif
+
+
+#if defined SHARED && defined USE_NSCD
+/* Load all libraries for the service. */
+static void
+nss_load_all_libraries (const char *service, const char *def)
+{
+ service_user *ni = NULL;
+
+ if (__nss_database_lookup (service, NULL, def, &ni) == 0)
+ while (ni != NULL)
+ {
+ nss_load_library (ni);
+ ni = ni->next;
+ }
+}
+
+
+/* Called by nscd and nscd alone. */
+void
+__nss_disable_nscd (void (*cb) (size_t, struct traced_file *))
+{
+# ifdef PTR_MANGLE
+ PTR_MANGLE (cb);
+# endif
+ nscd_init_cb = cb;
+ is_nscd = true;
+
+ /* Find all the relevant modules so that the init functions are called. */
+ nss_load_all_libraries ("passwd", DEFAULT_CONFIG);
+ nss_load_all_libraries ("group", DEFAULT_CONFIG);
+ nss_load_all_libraries ("hosts", "dns [!UNAVAIL=return] files");
+ nss_load_all_libraries ("services", NULL);
+
+ /* Disable all uses of NSCD. */
+ __nss_not_use_nscd_passwd = -1;
+ __nss_not_use_nscd_group = -1;
+ __nss_not_use_nscd_hosts = -1;
+ __nss_not_use_nscd_services = -1;
+ __nss_not_use_nscd_netgroup = -1;
+}
+#endif
+
+static void
+free_database_entries (name_database_entry *entry)
+{
+ while (entry != NULL)
+ {
+ name_database_entry *olde = entry;
+ service_user *service = entry->service;
+
+ while (service != NULL)
+ {
+ service_user *olds = service;
+
+ if (service->known != NULL)
+ __tdestroy (service->known, free);
+
+ service = service->next;
+ free (olds);
+ }
+
+ entry = entry->next;
+ free (olde);
+ }
+}
+
+/* Free all resources if necessary. */
+libc_freeres_fn (free_defconfig)
+{
+ name_database_entry *entry = defconfig_entries;
+
+ if (entry == NULL)
+ /* defconfig was not used. */
+ return;
+
+ /* Don't disturb ongoing other threads (if there are any). */
+ defconfig_entries = NULL;
+
+ free_database_entries (entry);
+}
+
+libc_freeres_fn (free_mem)
+{
+ name_database *top = service_table;
+ service_library *library;
+
+ if (top == NULL)
+ /* Maybe we have not read the nsswitch.conf file. */
+ return;
+
+ /* Don't disturb ongoing other threads (if there are any). */
+ service_table = NULL;
+
+ free_database_entries (top->entry);
+
+ library = top->library;
+ while (library != NULL)
+ {
+ service_library *oldl = library;
+
+ if (library->lib_handle && library->lib_handle != (void *) -1l)
+ __libc_dlclose (library->lib_handle);
+
+ library = library->next;
+ free (oldl);
+ }
+
+ free (top);
+}
projects / thirdparty / glibc.git / blobdiff