/* -1 == not found
0 == function found
1 == finished */
int
__nss_lookup (service_user **ni, const char *fct_name, void **fctp)
{
*fctp = __nss_lookup_function (*ni, fct_name);
while (*fctp == NULL
&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
&& (*ni)->next != NULL)
{
*ni = (*ni)->next;
*fctp = __nss_lookup_function (*ni, fct_name);
}
return *fctp != NULL ? 0 : (*ni)->next == NULL ? 1 : -1;
}
/* -1 == not found
0 == adjusted for next function
1 == finished */
int
__nss_next2 (service_user **ni, const char *fct_name, const char *fct2_name,
void **fctp, int status, int all_values)
{
if (all_values)
{
if (nss_next_action (*ni, NSS_STATUS_TRYAGAIN) == NSS_ACTION_RETURN
&& nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_RETURN
&& nss_next_action (*ni, NSS_STATUS_NOTFOUND) == NSS_ACTION_RETURN
&& nss_next_action (*ni, NSS_STATUS_SUCCESS) == NSS_ACTION_RETURN)
return 1;
}
else
{
/* This is really only for debugging. */
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;
}
if ((*ni)->next == NULL)
return -1;
do
{
*ni = (*ni)->next;
*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)->next != NULL);
return *fctp != NULL ? 0 : -1;
}
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;
}