int
internal_function
DB_LOOKUP_FCT (service_user **ni, const char *fct_name, const char *fct2_name,
void **fctp)
{
if (DATABASE_NAME_SYMBOL == NULL
&& __nss_database_lookup (DATABASE_NAME_STRING, ALTERNATE_NAME_STRING,
DEFAULT_CONFIG, &DATABASE_NAME_SYMBOL) < 0)
return -1;
*ni = DATABASE_NAME_SYMBOL;
return __nss_lookup (ni, fct_name, fct2_name, fctp);
}
static int
internal_function
__nss_passwd_nonlocal_lookup(service_user **ni, const char *fct_name,
void **fctp)
{
if (__nss_passwd_nonlocal_database == NULL
&& __nss_database_lookup("passwd_nonlocal", NULL, NULL,
&__nss_passwd_nonlocal_database) < 0)
return -1;
*ni = __nss_passwd_nonlocal_database;
*fctp = __nss_lookup_function(*ni, fct_name);
return 0;
}
/* Initialize the NSS interface/functions. The calling function must
hold the lock. */
static void
init_nss_interface (void)
{
__libc_lock_lock (lock);
/* Retest. */
if (ni == NULL
&& __nss_database_lookup ("group_compat", NULL, "nis", &ni) >= 0)
{
nss_initgroups_dyn = __nss_lookup_function (ni, "initgroups_dyn");
nss_setgrent = __nss_lookup_function (ni, "setgrent");
nss_getgrnam_r = __nss_lookup_function (ni, "getgrnam_r");
nss_getgrgid_r = __nss_lookup_function (ni, "getgrgid_r");
nss_getgrent_r = __nss_lookup_function (ni, "getgrent_r");
nss_endgrent = __nss_lookup_function (ni, "endgrent");
}
__libc_lock_unlock (lock);
}
static int
internal_getgrouplist (const char *user, gid_t group, long int *size,
gid_t **groupsp, long int limit)
{
#ifdef USE_NSCD
if (__nss_not_use_nscd_group > 0
&& ++__nss_not_use_nscd_group > NSS_NSCD_RETRY)
__nss_not_use_nscd_group = 0;
if (!__nss_not_use_nscd_group
&& !__nss_database_custom[NSS_DBSIDX_group])
{
int n = __nscd_getgrouplist (user, group, size, groupsp, limit);
if (n >= 0)
return n;
/* nscd is not usable. */
__nss_not_use_nscd_group = 1;
}
#endif
enum nss_status status = NSS_STATUS_UNAVAIL;
int no_more = 0;
/* Never store more than the starting *SIZE number of elements. */
assert (*size > 0);
(*groupsp)[0] = group;
/* Start is one, because we have the first group as parameter. */
long int start = 1;
if (__nss_initgroups_database == NULL)
{
if (__nss_database_lookup ("initgroups", NULL, "",
&__nss_initgroups_database) < 0)
{
if (__nss_group_database == NULL)
no_more = __nss_database_lookup ("group", NULL, "compat files",
&__nss_group_database);
__nss_initgroups_database = __nss_group_database;
}
else
use_initgroups_entry = true;
}
else
/* __nss_initgroups_database might have been set through
__nss_configure_lookup in which case use_initgroups_entry was
not set here. */
use_initgroups_entry = __nss_initgroups_database != __nss_group_database;
service_user *nip = __nss_initgroups_database;
while (! no_more)
{
long int prev_start = start;
initgroups_dyn_function fct = __nss_lookup_function (nip,
"initgroups_dyn");
if (fct == NULL)
status = compat_call (nip, user, group, &start, size, groupsp,
limit, &errno);
else
status = DL_CALL_FCT (fct, (user, group, &start, size, groupsp,
limit, &errno));
/* Remove duplicates. */
long int cnt = prev_start;
while (cnt < start)
{
long int inner;
for (inner = 0; inner < prev_start; ++inner)
if ((*groupsp)[inner] == (*groupsp)[cnt])
break;
if (inner < prev_start)
(*groupsp)[cnt] = (*groupsp)[--start];
else
++cnt;
}
/* This is really only for debugging. */
if (NSS_STATUS_TRYAGAIN > status || status > NSS_STATUS_RETURN)
__libc_fatal ("illegal status in internal_getgrouplist");
/* For compatibility reason we will continue to look for more
entries using the next service even though data has already
been found if the nsswitch.conf file contained only a 'groups'
line and no 'initgroups' line. If the latter is available
we always respect the status. This means that the default
for successful lookups is to return. */
if ((use_initgroups_entry || status != NSS_STATUS_SUCCESS)
&& nss_next_action (nip, status) == NSS_ACTION_RETURN)
break;
if (nip->next == NULL)
no_more = -1;
else
nip = nip->next;
}
return start;
}
