@@ -20,7 +20,7 @@
#include <set-hooks.h>
#include <libc-internal.h>
-#include "../nss/nss_module.h"
+#include "../nss/nsswitch.h"
#include "../libio/libioP.h"
DEFINE_HOOK (__libc_subfreeres, (void));
@@ -43,6 +43,8 @@ __libc_freeres (void)
void *const *p;
call_function_static_weak (__nss_module_freeres);
+ call_function_static_weak (__nss_action_freeres);
+ call_function_static_weak (__nss_database_freeres);
_IO_cleanup ();
@@ -66,7 +66,8 @@ tests-container = \
tst-nss-test3 \
tst-nss-files-hosts-long \
tst-nss-db-endpwent \
- tst-nss-db-endgrent
+ tst-nss-db-endgrent \
+ tst-reload1
# Tests which need libdl
ifeq (yes,$(build-shared))
@@ -16,7 +16,7 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
-#include <nss_action.h>
+#include <nsswitch.h>
#include <string.h>
#include <libc-lock.h>
@@ -16,8 +16,7 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
-#include "nss_action.h"
-#include "nss_module.h"
+#include <nsswitch.h>
#include <ctype.h>
#include <string.h>
@@ -169,18 +168,13 @@ nss_action_list
action_list_init (&list);
if (nss_action_parse (line, &list))
{
- size_t size = action_list_size (&list);
- nss_action_list result
- = malloc (sizeof (*result) * (size + 1));
- if (result == NULL)
- {
- action_list_free (&list);
- return NULL;
- }
- memcpy (result, action_list_begin (&list), sizeof (*result) * size);
- /* Sentinel. */
- result[size].module = NULL;
- return result;
+ size_t size;
+ struct nss_action null_service
+ = { .module = NULL, };
+
+ action_list_add (&list, null_service);
+ size = action_list_size (&list);
+ return __nss_action_allocate (action_list_begin (&list), size);
}
else if (action_list_has_failed (&list))
{
@@ -226,6 +226,39 @@ process_line (struct nss_database_data *data, char *line)
return true;
}
+int
+__nss_configure_lookup (const char *dbname, const char *service_line)
+{
+ int db;
+ nss_action_list result;
+ struct nss_database_state *local;
+
+ /* Convert named database to index. */
+ db = name_to_database_index (dbname);
+ if (db < 0)
+ /* Not our database (e.g., sudoers). */
+ return -1;
+
+ /* Force any load/cache/read whatever to happen, so we can override
+ it. */
+ __nss_database_get (db, &result);
+
+ local = nss_database_state_get ();
+
+ result = __nss_action_parse (service_line);
+ if (result == NULL)
+ return -1;
+
+ atomic_store_release (&local->data.reload_disabled, 1);
+ local->data.services[db] = result;
+
+#ifdef USE_NSCD
+ __nss_database_custom[db] = true;
+#endif
+
+ return 0;
+}
+
/* Iterate over the lines in FP, parse them, and store them in DATA.
Return false on memory allocation failure, true on success. */
static bool
@@ -326,8 +359,11 @@ nss_database_check_reload_and_get (struct nss_database_state *local,
may have loaded the configuration first, so synchronize with the
Release MO store there. */
if (atomic_load_acquire (&local->data.reload_disabled))
- /* No reload, so there is no error. */
- return true;
+ {
+ *result = local->data.services[database_index];
+ /* No reload, so there is no error. */
+ return true;
+ }
struct file_change_detection initial;
if (!__file_change_detection_for_path (&initial, _PATH_NSSWITCH_CONF))
@@ -16,7 +16,9 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
-#include <nss_module.h>
+#include <nsswitch.h>
+#include <nscd/nscd.h>
+#include <nscd/nscd_proto.h>
#include <array_length.h>
#include <assert.h>
@@ -287,6 +289,66 @@ __nss_module_get_function (struct nss_module *module, const char *name)
return fptr;
}
+#if defined SHARED && defined USE_NSCD
+/* Load all libraries for the service. */
+static void
+nss_load_all_libraries (const char *service, const char *def)
+{
+ nss_action_list ni = NULL;
+
+ if (__nss_database_lookup2 (service, NULL, def, &ni) == 0)
+ while (ni->module != NULL)
+ {
+ __nss_module_load (ni->module);
+ ++ni;
+ }
+}
+
+define_traced_file (pwd, _PATH_NSSWITCH_CONF);
+define_traced_file (grp, _PATH_NSSWITCH_CONF);
+define_traced_file (hst, _PATH_NSSWITCH_CONF);
+define_traced_file (serv, _PATH_NSSWITCH_CONF);
+define_traced_file (netgr, _PATH_NSSWITCH_CONF);
+
+/* Called by nscd and nscd alone. */
+void
+__nss_disable_nscd (void (*cb) (size_t, struct traced_file *))
+{
+ void (*cb1) (size_t, struct traced_file *);
+ cb1 = cb;
+# 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);
+
+ /* Make sure NSCD purges its cache if nsswitch.conf changes. */
+ init_traced_file (&pwd_traced_file.file, _PATH_NSSWITCH_CONF, 0);
+ cb1 (pwddb, &pwd_traced_file.file);
+ init_traced_file (&grp_traced_file.file, _PATH_NSSWITCH_CONF, 0);
+ cb1 (grpdb, &grp_traced_file.file);
+ init_traced_file (&hst_traced_file.file, _PATH_NSSWITCH_CONF, 0);
+ cb1 (hstdb, &hst_traced_file.file);
+ init_traced_file (&serv_traced_file.file, _PATH_NSSWITCH_CONF, 0);
+ cb1 (servdb, &serv_traced_file.file);
+ init_traced_file (&netgr_traced_file.file, _PATH_NSSWITCH_CONF, 0);
+ cb1 (netgrdb, &netgr_traced_file.file);
+
+ /* 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
+
void __libc_freeres_fn_section
__nss_module_freeres (void)
{
@@ -32,6 +32,7 @@
#include <netinet/ether.h>
#include <pwd.h>
#include <shadow.h>
+#include <unistd.h>
#if !defined DO_STATIC_NSS || defined SHARED
# include <gnu/lib-names.h>
@@ -42,36 +43,20 @@
#include <sysdep.h>
#include <config.h>
-/* Prototypes for the local functions. */
-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
-
-
/* Declare external database variables. */
#define DEFINE_DATABASE(name) \
- service_user *__nss_##name##_database attribute_hidden; \
+ nss_action_list __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 DEFINE_DATABASE(name) #name,
+static const char * database_names[] = {
+#include "databases.def"
+ NULL
};
-#define ndatabases (sizeof (databases) / sizeof (databases[0]))
#ifdef USE_NSCD
/* Flags whether custom rules for database is set. */
@@ -79,103 +64,33 @@ 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;
-
-
-#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
-
+/*__libc_lock_define_initialized (static, lock)*/
/* -1 == database not found
0 == database entry pointer stored */
int
__nss_database_lookup2 (const char *database, const char *alternate_name,
- const char *defconfig, service_user **ni)
+ const char *defconfig, nss_action_list *ni)
{
- /* Prevent multiple threads to change the service table. */
- __libc_lock_lock (lock);
+ int database_id;
- /* 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;
- }
+ for (database_id = 0; database_names[database_id]; database_id++)
+ if (strcmp (database_names[database_id], database) == 0)
+ break;
- /* Are we initialized yet? */
- if (service_table == NULL)
- /* Read config file. */
- service_table = nss_parse_file (_PATH_NSSWITCH_CONF);
+ if (database_names[database_id] == NULL)
+ return -1;
- /* Test whether configuration data is available. */
- if (service_table != NULL)
+ if (__nss_database_get (database_id, ni))
{
- /* 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;
+ /* Success. */
+ 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.
-
- DEFCONFIG specifies the default service list for this database,
- or null to use the most common default. */
- if (*ni == NULL)
+ else
{
- *ni = nss_parse_service_list (defconfig ?: "files");
- if (*ni != NULL)
- {
- /* Record the memory we've just allocated in defconfig_entries list,
- so we can free it later. */
- name_database_entry *entry;
-
- /* 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;
- }
- }
+ /* Failure. */
+ return -1;
}
-
- __libc_lock_unlock (lock);
-
- return *ni != NULL ? 0 : -1;
}
libc_hidden_def (__nss_database_lookup2)
@@ -184,7 +99,7 @@ libc_hidden_def (__nss_database_lookup2)
0 == function found
1 == finished */
int
-__nss_lookup (service_user **ni, const char *fct_name, const char *fct2_name,
+__nss_lookup (nss_action_list *ni, const char *fct_name, const char *fct2_name,
void **fctp)
{
*fctp = __nss_lookup_function (*ni, fct_name);
@@ -193,16 +108,16 @@ __nss_lookup (service_user **ni, const char *fct_name, const char *fct2_name,
while (*fctp == NULL
&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
- && (*ni)->next != NULL)
+ && (*ni)[1].module != NULL)
{
- *ni = (*ni)->next;
+ ++(*ni);
*fctp = __nss_lookup_function (*ni, fct_name);
if (*fctp == NULL && fct2_name != NULL)
*fctp = __nss_lookup_function (*ni, fct2_name);
}
- return *fctp != NULL ? 0 : (*ni)->next == NULL ? 1 : -1;
+ return *fctp != NULL ? 0 : (*ni)[1].module == NULL ? 1 : -1;
}
libc_hidden_def (__nss_lookup)
@@ -211,7 +126,7 @@ libc_hidden_def (__nss_lookup)
0 == adjusted for next function
1 == finished */
int
-__nss_next2 (service_user **ni, const char *fct_name, const char *fct2_name,
+__nss_next2 (nss_action_list *ni, const char *fct_name, const char *fct2_name,
void **fctp, int status, int all_values)
{
if (all_values)
@@ -233,12 +148,12 @@ __nss_next2 (service_user **ni, const char *fct_name, const char *fct2_name,
return 1;
}
- if ((*ni)->next == NULL)
+ if ((*ni)[1].module == NULL)
return -1;
do
{
- *ni = (*ni)->next;
+ ++(*ni);
*fctp = __nss_lookup_function (*ni, fct_name);
if (*fctp == NULL && fct2_name != NULL)
@@ -246,675 +161,17 @@ __nss_next2 (service_user **ni, const char *fct_name, const char *fct2_name,
}
while (*fctp == NULL
&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
- && (*ni)->next != NULL);
+ && (*ni)[1].module != NULL);
return *fctp != NULL ? 0 : -1;
}
libc_hidden_def (__nss_next2)
-int
-__nss_configure_lookup (const char *dbname, const char *service_line)
-{
- service_user *new_db;
- size_t cnt;
-
- 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;
- }
- }
-
- 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;
-}
-
-
-/* Comparison function for searching NI->known tree. */
-static int
-known_compare (const void *p1, const void *p2)
-{
- return p1 == p2 ? 0 : strcmp (*(const char *const *) p1,
- *(const char *const *) p2);
-}
-
-
-#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;
-
- /* We now modify global data. Protect it. */
- __libc_lock_lock (lock);
-
- /* Search the tree of functions previously requested. Data in the
- tree are `known_function' structures, whose first member is a
- `const char *', the lookup key. The search returns a pointer to
- the tree node structure; the first member of the is a pointer to
- our structure (i.e. what will be a `known_function'); since the
- first member of that is the lookup key string, &FCT_NAME is close
- 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, &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
- (in the proper sorted position for FCT_NAME) that points to
- &FCT_NAME instead of any real `known_function' structure.
- Allocate a new structure and fill it in. */
-
- 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, &ni->known, &known_compare);
- free (known);
- result = NULL;
- }
- else
- {
- /* Point the tree node at this new structure. */
- *found = known;
- known->fct_name = fct_name;
-
-#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 (ni->library->lib_handle == (void *) -1l)
- /* Library not found => function not found. */
- result = NULL;
- else
- {
- /* Get the desired function. */
- size_t namlen = (5 + strlen (ni->name) + 1
- + strlen (fct_name) + 1);
- char name[namlen];
-
- /* Construct the function name. */
- __stpcpy (__stpcpy (__stpcpy (__stpcpy (name, "_nss_"),
- ni->name),
- "_"),
- fct_name);
-
- /* Look up the symbol. */
- 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
- }
- }
-
- /* Remove the lock. */
- __libc_lock_unlock (lock);
-
- return result;
-}
-libc_hidden_def (__nss_lookup_function)
-
-
-static name_database *
-nss_parse_file (const char *fname)
+__nss_lookup_function (nss_action_list ni, const char *fct_name)
{
- FILE *fp;
- name_database *result;
- name_database_entry *last;
- char *line;
- size_t len;
-
- /* Open the configuration file. */
- fp = fopen (fname, "rce");
- if (fp == NULL)
+ if (ni->module == NULL)
return NULL;
-
- /* No threads use this stream. */
- __fsetlocking (fp, FSETLOCKING_BYCALLER);
-
- result = (name_database *) malloc (sizeof (name_database));
- if (result == NULL)
- {
- fclose (fp);
- return NULL;
- }
-
- result->entry = NULL;
- result->library = NULL;
- last = NULL;
- line = NULL;
- len = 0;
- do
- {
- name_database_entry *this;
- ssize_t n;
-
- n = __getline (&line, &len, fp);
- if (n < 0)
- break;
- if (line[n - 1] == '\n')
- line[n - 1] = '\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. */
- *__strchrnul (line, '#') = '\0';
-
- /* If the line is blank it is ignored. */
- if (line[0] == '\0')
- continue;
-
- /* Each line completely specifies the actions for a database. */
- this = nss_getline (line);
- if (this != NULL)
- {
- if (last != NULL)
- last->next = this;
- else
- result->entry = this;
-
- last = this;
- }
- }
- while (!__feof_unlocked (fp));
-
- /* Free the buffer. */
- free (line);
- /* Close configuration file. */
- fclose (fp);
-
- return result;
-}
-
-
-/* Read the source names:
- `( <source> ( "[" "!"? (<status> "=" <action> )+ "]" )? )*'
- */
-static service_user *
-nss_parse_service_list (const char *line)
-{
- service_user *result = NULL, **nextp = &result;
-
- while (1)
- {
- service_user *new_service;
- const char *name;
-
- while (isspace (line[0]))
- ++line;
- if (line[0] == '\0')
- /* No source specified. */
- return result;
-
- /* Read <source> identifier. */
- name = line;
- while (line[0] != '\0' && !isspace (line[0]) && line[0] != '[')
- ++line;
- if (name == line)
- return result;
-
-
- new_service = (service_user *) malloc (sizeof (service_user)
- + (line - name + 1));
- if (new_service == NULL)
- return result;
-
- *((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;
-
- while (isspace (line[0]))
- ++line;
-
- if (line[0] == '[')
- {
- /* Read criterions. */
- do
- ++line;
- while (line[0] != '\0' && isspace (line[0]));
-
- do
- {
- int not;
- enum nss_status status;
- lookup_actions action;
-
- /* Grok ! before name to mean all statii but that one. */
- not = line[0] == '!';
- if (not)
- ++line;
-
- /* Read status name. */
- name = line;
- while (line[0] != '\0' && !isspace (line[0]) && line[0] != '='
- && line[0] != ']')
- ++line;
-
- /* Compare with known statii. */
- if (line - name == 7)
- {
- if (__strncasecmp (name, "SUCCESS", 7) == 0)
- status = NSS_STATUS_SUCCESS;
- else if (__strncasecmp (name, "UNAVAIL", 7) == 0)
- status = NSS_STATUS_UNAVAIL;
- else
- goto finish;
- }
- else if (line - name == 8)
- {
- if (__strncasecmp (name, "NOTFOUND", 8) == 0)
- status = NSS_STATUS_NOTFOUND;
- else if (__strncasecmp (name, "TRYAGAIN", 8) == 0)
- status = NSS_STATUS_TRYAGAIN;
- else
- goto finish;
- }
- else
- goto finish;
-
- while (isspace (line[0]))
- ++line;
- if (line[0] != '=')
- goto finish;
- do
- ++line;
- while (isspace (line[0]));
-
- name = line;
- while (line[0] != '\0' && !isspace (line[0]) && line[0] != '='
- && line[0] != ']')
- ++line;
-
- if (line - name == 6 && __strncasecmp (name, "RETURN", 6) == 0)
- action = NSS_ACTION_RETURN;
- 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
- goto finish;
-
- if (not)
- {
- /* Save the current action setting for this status,
- set them all to the given action, and reset this one. */
- const lookup_actions save = new_service->actions[2 + status];
- new_service->actions[2 + NSS_STATUS_TRYAGAIN] = action;
- new_service->actions[2 + NSS_STATUS_UNAVAIL] = action;
- new_service->actions[2 + NSS_STATUS_NOTFOUND] = action;
- new_service->actions[2 + NSS_STATUS_SUCCESS] = action;
- new_service->actions[2 + status] = save;
- }
- else
- new_service->actions[2 + status] = action;
-
- /* Skip white spaces. */
- while (isspace (line[0]))
- ++line;
- }
- while (line[0] != ']');
-
- /* Skip the ']'. */
- ++line;
- }
-
- *nextp = new_service;
- nextp = &new_service->next;
- continue;
-
- finish:
- free (new_service);
- return result;
- }
-}
-
-static name_database_entry *
-nss_getline (char *line)
-{
- 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
- beginning with a white space character is ignored. We regard
- this as just another misfeature in Solaris. */
- while (isspace (line[0]))
- ++line;
-
- /* Recognize `<database> ":"'. */
- name = line;
- while (line[0] != '\0' && !isspace (line[0]) && line[0] != ':')
- ++line;
- if (line[0] == '\0' || name == line)
- /* Syntax error. */
- return NULL;
- *line++ = '\0';
-
- len = strlen (name) + 1;
-
- result = (name_database_entry *) malloc (sizeof (name_database_entry) + len);
- if (result == NULL)
- return NULL;
-
- /* Save the database name. */
- memcpy (result->name, name, len);
-
- /* Parse the list of services. */
- result->service = nss_parse_service_list (line);
-
- result->next = NULL;
- return result;
-}
-
-
-#if !defined DO_STATIC_NSS || defined SHARED
-static service_library *
-nss_new_service (name_database *database, const char *name)
-{
- service_library **currentp = &database->library;
-
- while (*currentp != NULL)
- {
- if (strcmp ((*currentp)->name, name) == 0)
- return *currentp;
- currentp = &(*currentp)->next;
- }
-
- /* We have to add the new service. */
- *currentp = (service_library *) malloc (sizeof (service_library));
- if (*currentp == NULL)
- return NULL;
-
- (*currentp)->name = name;
- (*currentp)->lib_handle = NULL;
- (*currentp)->next = NULL;
-
- 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_lookup2 (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", "files");
- nss_load_all_libraries ("group", "files");
- 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);
+ return __nss_module_get_function (ni->module, fct_name);
}
+libc_hidden_def (__nss_lookup_function)
@@ -36,6 +36,7 @@ typedef enum
NSS_ACTION_MERGE
} lookup_actions;
+struct nss_action;
typedef struct service_library
{
@@ -58,42 +59,8 @@ typedef struct
} known_function;
-typedef struct service_user
-{
- /* And the link to the next entry. */
- struct service_user *next;
- /* Action according to result. */
- lookup_actions actions[5];
- /* Link to the underlying library object. */
- service_library *library;
- /* Collection of known functions. */
- void *known;
- /* Name of the service (`files', `dns', `nis', ...). */
- char name[0];
-} service_user;
-
/* To access the action based on the status value use this macro. */
-#define nss_next_action(ni, status) ((ni)->actions[2 + status])
-
-
-typedef struct name_database_entry
-{
- /* And the link to the next entry. */
- struct name_database_entry *next;
- /* List of service to be used. */
- service_user *service;
- /* Name of the database. */
- char name[0];
-} name_database_entry;
-
-
-typedef struct name_database
-{
- /* List of all known databases. */
- name_database_entry *entry;
- /* List of libraries with service implementation. */
- service_library *library;
-} name_database;
+#define nss_next_action(ni, status) nss_action_get (ni, status)
#ifdef USE_NSCD
@@ -127,13 +94,13 @@ extern bool __nss_database_custom[NSS_DBSIDX_max] attribute_hidden;
than one function can use the database. */
extern int __nss_database_lookup2 (const char *database,
const char *alternative_name,
- const char *defconfig, service_user **ni);
+ const char *defconfig, struct nss_action **ni);
libc_hidden_proto (__nss_database_lookup2)
/* Put first function with name FCT_NAME for SERVICE in FCTP. The
position is remembered in NI. The function returns a value < 0 if
an error occurred or no such function exists. */
-extern int __nss_lookup (service_user **ni, const char *fct_name,
+extern int __nss_lookup (struct nss_action **ni, const char *fct_name,
const char *fct2_name, void **fctp);
libc_hidden_proto (__nss_lookup)
@@ -150,16 +117,16 @@ libc_hidden_proto (__nss_lookup)
services. In other words, only if all four lookup results have
the action RETURN associated the lookup process stops before the
natural end. */
-extern int __nss_next2 (service_user **ni, const char *fct_name,
+extern int __nss_next2 (struct nss_action **ni, const char *fct_name,
const char *fct2_name, void **fctp, int status,
int all_values) attribute_hidden;
libc_hidden_proto (__nss_next2)
-extern int __nss_next (service_user **ni, const char *fct_name, void **fctp,
+extern int __nss_next (struct nss_action **ni, const char *fct_name, void **fctp,
int status, int all_values);
/* Search for the service described in NI for a function named FCT_NAME
and return a pointer to this function if successful. */
-extern void *__nss_lookup_function (service_user *ni, const char *fct_name);
+extern void *__nss_lookup_function (struct nss_action *ni, const char *fct_name);
libc_hidden_proto (__nss_lookup_function)
@@ -169,7 +136,7 @@ struct traced_file;
extern void __nss_disable_nscd (void (*) (size_t, struct traced_file *));
-typedef int (*db_lookup_function) (service_user **, const char *, const char *,
+typedef int (*db_lookup_function) (struct nss_action **, const char *, const char *,
void **);
typedef enum nss_status (*setent_function) (int);
typedef enum nss_status (*endent_function) (void);
@@ -180,20 +147,20 @@ typedef int (*getent_r_function) (void *, char *, size_t,
extern void __nss_setent (const char *func_name,
db_lookup_function lookup_fct,
- service_user **nip, service_user **startp,
- service_user **last_nip, int stayon,
+ struct nss_action **nip, struct nss_action **startp,
+ struct nss_action **last_nip, int stayon,
int *stayon_tmp, int res)
attribute_hidden;
extern void __nss_endent (const char *func_name,
db_lookup_function lookup_fct,
- service_user **nip, service_user **startp,
- service_user **last_nip, int res)
+ struct nss_action **nip, struct nss_action **startp,
+ struct nss_action **last_nip, int res)
attribute_hidden;
extern int __nss_getent_r (const char *getent_func_name,
const char *setent_func_name,
db_lookup_function lookup_fct,
- service_user **nip, service_user **startp,
- service_user **last_nip, int *stayon_tmp,
+ struct nss_action **nip, struct nss_action **startp,
+ struct nss_action **last_nip, int *stayon_tmp,
int res,
void *resbuf, char *buffer, size_t buflen,
void **result, int *h_errnop)
@@ -227,11 +194,15 @@ libc_hidden_proto (__nss_hostname_digits_dots)
/* Prototypes for __nss_*_lookup2 functions. */
#define DEFINE_DATABASE(arg) \
- extern service_user *__nss_##arg##_database attribute_hidden; \
- int __nss_##arg##_lookup2 (service_user **, const char *, \
+ extern struct nss_action *__nss_##arg##_database attribute_hidden; \
+ int __nss_##arg##_lookup2 (struct nss_action **, const char *, \
const char *, void **); \
libc_hidden_proto (__nss_##arg##_lookup2)
#include "databases.def"
#undef DEFINE_DATABASE
+#include <nss/nss_module.h>
+#include <nss/nss_action.h>
+#include <nss/nss_database.h>
+
#endif /* nsswitch.h */