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>

7 files changed, 93 insertions, 48 deletions

diff --git a/ChangeLog b/ChangeLog
index 25c83be..46fc4bd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,21 @@
 2000-07-23  Ulrich Drepper  <drepper@redhat.com>
 
+	* 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>
+
 	* locale/iso-639.def: Some errors corrected.
 	Patch by Keld Simonsen.
 
diff --git a/grp/initgroups.c b/grp/initgroups.c
index 06c48bb..950ebfe 100644
--- a/grp/initgroups.c
+++ b/grp/initgroups.c
@@ -49,7 +49,7 @@ extern service_user *__nss_group_database;
 
 static enum nss_status
 compat_call (service_user *nip, const char *user, gid_t group, long int *start,
-	     long int *size, gid_t *groups, long int limit, int *errnop)
+	     long int *size, gid_t **groupsp, int *errnop)
 {
   struct group grpbuf;
   size_t buflen = __sysconf (_SC_GETGR_R_SIZE_MAX);
@@ -58,6 +58,7 @@ compat_call (service_user *nip, const char *user, gid_t group, long int *start,
   set_function setgrent_fct;
   get_function getgrent_fct;
   end_function endgrent_fct;
+  gid_t *groups = *groupsp;
 
   getgrent_fct = __nss_lookup_function (nip, "getgrent_r");
   if (getgrent_fct == NULL)
@@ -97,22 +98,20 @@ compat_call (service_user *nip, const char *user, gid_t group, long int *start,
             if (strcmp (*m, user) == 0)
               {
                 /* Matches user.  Insert this group.  */
-                if (*start == *size && limit <= 0)
+                if (__builtin_expect (*start == *size, 0))
                   {
                     /* Need a bigger buffer.  */
-                    groups = realloc (groups, 2 * *size * sizeof (*groups));
-                    if (groups == NULL)
+		    gid_t *newgroups;
+                    newgroups = realloc (groups, 2 * *size * sizeof (*groups));
+                    if (newgroups == NULL)
                       goto done;
+		    *groupsp = groups = newgroups;
                     *size *= 2;
                   }
 
                 groups[*start] = grpbuf.gr_gid;
                 *start += 1;
 
-                if (*start == limit)
-                  /* Can't take any more groups; stop searching.  */
-                  goto done;
-
                 break;
               }
         }
@@ -149,10 +148,9 @@ initgroups (user, group)
   long int start = 1;
   long int size;
   gid_t *groups;
+  int result;
 #ifdef NGROUPS_MAX
-# define limit NGROUPS_MAX
-
-  size = limit;
+  size = NGROUPS_MAX;
 #else
   long int limit = __sysconf (_SC_NGROUPS_MAX);
 
@@ -181,19 +179,19 @@ initgroups (user, group)
 
   while (! no_more)
     {
-      fct = __nss_lookup_function (nip, "initgroups");
+      fct = __nss_lookup_function (nip, "initgroups_dyn");
 
       if (fct == NULL)
 	{
-	  status = compat_call (nip, user, group, &start, &size, groups,
-				limit, &errno);
+	  status = compat_call (nip, user, group, &start, &size, &groups,
+				&errno);
 
 	  if (nss_next_action (nip, NSS_STATUS_UNAVAIL) != NSS_ACTION_CONTINUE)
 	    break;
 	}
       else
-	status = DL_CALL_FCT (fct, (user, group, &start, &size, groups, limit,
-				     &errno));
+	status = DL_CALL_FCT (fct, (user, group, &start, &size, &groups,
+				    &errno));
 
       /* This is really only for debugging.  */
       if (NSS_STATUS_TRYAGAIN > status || status > NSS_STATUS_RETURN)
@@ -209,6 +207,11 @@ initgroups (user, group)
 	nip = nip->next;
     }
 
-  return setgroups (start, groups);
+  /* Try to set the maximum number of groups the kernel can handle.  */
+  do
+    result = setgroups (start, groups);
+  while (result == -1 && errno == EINVAL && --start > 0);
+
+  return result;
 #endif
 }
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);
 
diff --git a/nis/Versions b/nis/Versions
index ec8ade0..8bcf9a8 100644
--- a/nis/Versions
+++ b/nis/Versions
@@ -64,9 +64,12 @@ libnss_compat {
     _nss_compat_endgrent; _nss_compat_endpwent; _nss_compat_endspent;
     _nss_compat_getgrent_r; _nss_compat_getgrgid_r; _nss_compat_getgrnam_r;
     _nss_compat_getpwent_r; _nss_compat_getpwnam_r; _nss_compat_getpwuid_r;
-    _nss_compat_getspent_r; _nss_compat_getspnam_r; _nss_compat_initgroups;
+    _nss_compat_getspent_r; _nss_compat_getspnam_r;
     _nss_compat_setgrent; _nss_compat_setpwent; _nss_compat_setspent;
   }
+  GLIBC_2.2 {
+    _nss_compat_initgroups_dyn;
+  }
 }
 
 libnss_nis {
@@ -85,14 +88,14 @@ libnss_nis {
     _nss_nis_getpwnam_r; _nss_nis_getpwuid_r; _nss_nis_getrpcbyname_r;
     _nss_nis_getrpcbynumber_r; _nss_nis_getrpcent_r; _nss_nis_getsecretkey;
     _nss_nis_getservbyname_r; _nss_nis_getservbyport_r; _nss_nis_getservent_r;
-    _nss_nis_getspent_r; _nss_nis_getspnam_r; _nss_nis_initgroups;
+    _nss_nis_getspent_r; _nss_nis_getspnam_r;
     _nss_nis_netname2user; _nss_nis_setaliasent; _nss_nis_setetherent;
     _nss_nis_setgrent; _nss_nis_sethostent; _nss_nis_setnetent;
     _nss_nis_setnetgrent; _nss_nis_setprotoent; _nss_nis_setpwent;
     _nss_nis_setrpcent; _nss_nis_setservent; _nss_nis_setspent;
   }
   GLIBC_2.2 {
-    _nss_nis_getipnodebyname_r;
+    _nss_nis_getipnodebyname_r; _nss_nis_initgroups_dyn;
   }
 }
 
diff --git a/nis/nss_compat/compat-initgroups.c b/nis/nss_compat/compat-initgroups.c
index 6051a1a..4d14615 100644
--- a/nis/nss_compat/compat-initgroups.c
+++ b/nis/nss_compat/compat-initgroups.c
@@ -588,15 +588,15 @@ internal_getgrent_r (struct group *gr, ent_t *ent, char *buffer,
 }
 
 enum nss_status
-_nss_compat_initgroups (const char *user, gid_t group, long int *start,
-			long int *size, gid_t *groups, long int limit,
-			int *errnop)
+_nss_compat_initgroups_dyn (const char *user, gid_t group, long int *start,
+			    long int *size, gid_t **groupsp, int *errnop)
 {
   struct group grpbuf, *g;
   size_t buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
   char *tmpbuf;
   enum nss_status status;
   ent_t intern = {0, 0, NULL, 0, NULL, NULL, {NULL, 0, 0}};
+  gid_t *groups = *groupsp;
 
   status = internal_setgrent (&intern);
   if (status != NSS_STATUS_SUCCESS)
@@ -627,22 +627,20 @@ _nss_compat_initgroups (const char *user, gid_t group, long int *start,
             if (strcmp (*m, user) == 0)
               {
                 /* Matches user.  Insert this group.  */
-                if (*start == *size && limit <= 0)
+                if (*start == *size)
                   {
                     /* Need a bigger buffer.  */
-                    groups = realloc (groups, 2 * *size * sizeof (*groups));
-                    if (groups == NULL)
+		    gid_t *newgroups;
+                    newgroups = realloc (groups, 2 * *size * sizeof (*groups));
+                    if (newgroups == NULL)
                       goto done;
+		    *groupsp = groups = newgroups;
                     *size *= 2;
                   }
 
                 groups[*start] = g->gr_gid;
                 *start += 1;
 
-                if (*start == limit)
-                  /* Can't take any more groups; stop searching.  */
-                  goto done;
-
                 break;
               }
         }
diff --git a/nis/nss_nis/nis-initgroups.c b/nis/nss_nis/nis-initgroups.c
index 9e18a20..ec13dbd 100644
--- a/nis/nss_nis/nis-initgroups.c
+++ b/nis/nss_nis/nis-initgroups.c
@@ -137,15 +137,15 @@ internal_getgrent_r (struct group *grp, char *buffer, size_t buflen,
 }
 
 enum nss_status
-_nss_nis_initgroups (const char *user, gid_t group, long int *start,
-		     long int *size, gid_t *groups, long int limit,
-		     int *errnop)
+_nss_nis_initgroups_dyn (const char *user, gid_t group, long int *start,
+			 long int *size, gid_t **groupsp, int *errnop)
 {
   struct group grpbuf, *g;
   size_t buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
   char *tmpbuf;
   enum nss_status status;
   intern_t intern = { NULL, NULL };
+  gid_t *groups = *groupsp;
 
   status = internal_setgrent (&intern);
   if (status != NSS_STATUS_SUCCESS)
@@ -177,22 +177,20 @@ _nss_nis_initgroups (const char *user, gid_t group, long int *start,
             if (strcmp (*m, user) == 0)
               {
                 /* Matches user.  Insert this group.  */
-                if (*start == *size && limit <= 0)
+                if (*start == *size)
                   {
                     /* Need a bigger buffer.  */
-		    groups = realloc (groups, 2 * *size * sizeof (*groups));
-		    if (groups == NULL)
+		    gid_t *newgroups;
+		    newgroups = realloc (groups, 2 * *size * sizeof (*groups));
+		    if (newgroups == NULL)
 		      goto done;
+		    *groupsp = groups = newgroups;
                     *size *= 2;
                   }
 
                 groups[*start] = g->gr_gid;
 		*start += 1;
 
-                if (*start == limit)
-                  /* Can't take any more groups; stop searching.  */
-                  goto done;
-
                 break;
               }
         }