Initial import

[samba] / source / lib / util_smbd.c

diff --git a/source/lib/util_smbd.c b/source/lib/util_smbd.c
new file mode 100644 (file)
index 0000000..c6f6bc0
--- /dev/null
+++ b/source/lib/util_smbd.c
@@ -0,0 +1,86 @@
+/*
+   Unix SMB/CIFS implementation.
+   Samba utility functions, used in smbd only
+   Copyright (C) Andrew Tridgell 2002
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+/* 
+   This function requires sys_getgrouplist - which is only
+   available in smbd due to it's use of become_root() in a 
+   legacy systems hack.
+*/
+
+/*
+  return a full list of groups for a user
+
+  returns the number of groups the user is a member of. The return will include the
+  users primary group.
+
+  remember to free the resulting gid_t array
+
+  NOTE! uses become_root() to gain correct priviages on systems
+  that lack a native getgroups() call (uses initgroups and getgroups)
+*/
+BOOL getgroups_user(const char *user, gid_t primary_gid, gid_t **ret_groups, int *ngroups)
+{
+       int ngrp, max_grp;
+       gid_t *temp_groups;
+       gid_t *groups;
+       int i;
+
+       max_grp = groups_max();
+       temp_groups = SMB_MALLOC_ARRAY(gid_t, max_grp);
+       if (! temp_groups) {
+               return False;
+       }
+
+       if (sys_getgrouplist(user, primary_gid, temp_groups, &max_grp) == -1) {
+               
+               gid_t *groups_tmp;
+               
+               groups_tmp = SMB_REALLOC_ARRAY(temp_groups, gid_t, max_grp);
+               
+               if (!groups_tmp) {
+                       SAFE_FREE(temp_groups);
+                       return False;
+               }
+               temp_groups = groups_tmp;
+               
+               if (sys_getgrouplist(user, primary_gid, temp_groups, &max_grp) == -1) {
+                       DEBUG(0, ("get_user_groups: failed to get the unix group list\n"));
+                       SAFE_FREE(temp_groups);
+                       return False;
+               }
+       }
+       
+       ngrp = 0;
+       groups = NULL;
+
+       /* Add in primary group first */
+       add_gid_to_array_unique(NULL, primary_gid, &groups, &ngrp);
+
+       for (i=0; i<max_grp; i++)
+               add_gid_to_array_unique(NULL, temp_groups[i], &groups, &ngrp);
+
+       *ngroups = ngrp;
+       *ret_groups = groups;
+       SAFE_FREE(temp_groups);
+       return True;
+}
+