Update.

	* grp/initgroups.c (initgroups): Don't limit the possible number
	of groups to NGROUPS_MAX.  Allow dynamic resizing.  Loop around
	the setgroups call while the call fails and descrease the number
	of groups each round.
	The name of the initgroups function in the NSS modules changed.
	(compat_call): Adapt for dynamic resizing.
	* hesiod/nss_hesiod/hesiod-grp.c (_nss_hesiod_initgroups_dyn):
	Implement dynamic resizing.
	* nis/nss_compat/compat-initgroups.c (_nss_compat_initgroups_dyn):
	Likewise.
	* nis/nss_nis/compat-initgroups.c (_nss_nis_initgroups_dyn): Likewise.
	* hesiod/Versions: Change exported interface name.
	* nis/Versions: Change exported interface name.

2000-07-23  Ulrich Drepper  <drepper@redhat.com>

2 files changed, 35 insertions, 8 deletions

diff --git a/hesiod/Versions b/hesiod/Versions
index c51dee9..180befb 100644
--- a/hesiod/Versions
+++ b/hesiod/Versions
@@ -8,7 +8,7 @@ libnss_hesiod {
     _nss_hesiod_getservbyname_r;
   }
   GLIBC_2.2 {
-    _nss_hesiod_initgroups;
+    _nss_hesiod_initgroups_dyn;
     _nss_hesiod_getservbyport_r;
     _nss_hesiod_setprotoent; _nss_hesiod_endprotoent;
     _nss_hesiod_getprotobyname_r; _nss_hesiod_getprotobynumber_r;
diff --git a/hesiod/nss_hesiod/hesiod-grp.c b/hesiod/nss_hesiod/hesiod-grp.c
index 2d5b96b..a89ed4e 100644
--- a/hesiod/nss_hesiod/hesiod-grp.c
+++ b/hesiod/nss_hesiod/hesiod-grp.c
@@ -164,14 +164,14 @@ internal_gid_from_group (void *context, const char *groupname, gid_t *group)
 }
 
 enum nss_status
-_nss_hesiod_initgroups (const char *user, gid_t group, long int *start,
-                        long int *size, gid_t *groups, long int limit,
-                        int *errnop)
+_nss_hesiod_initgroups_dyn (const char *user, gid_t group, long int *start,
+			    long int *size, gid_t **groupsp, int *errnop)
 {
   enum nss_status status = NSS_STATUS_SUCCESS;
   char **list = NULL;
   char *p;
   void *context;
+  gid_t *groups = *groupsp;
 
   context = _nss_hesiod_init ();
   if (context == NULL)
@@ -185,11 +185,24 @@ _nss_hesiod_initgroups (const char *user, gid_t group, long int *start,
       return errno == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL;
     }
 
-  if (!internal_gid_in_list (groups, group, *start) && *start < limit)
-    groups[(*start)++] = group;
+  if (!internal_gid_in_list (groups, group, *start))
+    {
+      if (__builtin_expect (*start == *size, 0))
+	{
+	  /* Need a bigger buffer.  */
+	  gid_t *newgroups;
+	  newgroups = realloc (groups, 2 * *size * sizeof (*groups));
+	  if (newgroups == NULL)
+	    goto done;
+	  *groupsp = groups = newgroups;
+	  *size *= 2;
+	}
+
+      groups[(*start)++] = group;
+    }
 
   p = *list;
-  while (*p != '\0' && *start < limit)
+  while (*p != '\0')
     {
       char *endp;
       char *q;
@@ -214,12 +227,26 @@ _nss_hesiod_initgroups (const char *user, gid_t group, long int *start,
 
 	  if (status == NSS_STATUS_SUCCESS
 	      && !internal_gid_in_list (groups, group, *start))
-	    groups[(*start)++] = group;
+	    {
+	      if (__builtin_expect (*start == *size, 0))
+		{
+		  /* Need a bigger buffer.  */
+		  gid_t *newgroups;
+		  newgroups = realloc (groups, 2 * *size * sizeof (*groups));
+		  if (newgroups == NULL)
+		    goto done;
+		  *groupsp = groups = newgroups;
+		  *size *= 2;
+		}
+
+	      groups[(*start)++] = group;
+	    }
 	}
 
       p = q;
     }
 
+ done:
   hesiod_free_list (context, list);
   hesiod_end (context);