source: branches/samba-3.0/testsuite/nsswitch/getent_grent.c

/* Test out of order operations with {set,get,end}grent */

/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   Security context tests
   Copyright (C) Tim Potter 2000
   
   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 <stdio.h>
#include <grp.h>

int main (int argc, char **argv)
{
        struct group *gr;
        int found = 0;
        int num_users, i;

        /* Test getgrent() without setgrent() */

        for (i = 0; i < 100; i++) {
                gr = getgrent();

                /* This is supposed to work */

#if 0
                if (gr != NULL) {
                        printf("FAIL: getgrent() with no setgrent()\n");
                        return 1;
                }
#endif
        }

        /* Work out how many user till first domain group */

        num_users = 0;
        setgrent();

        while (1) {
                gr = getgrent();
                num_users++;

                if (gr == NULL) break;

                if (strchr(gr->gr_name, '/')) {
                        found = 1;
                        break;
                }

        }

        if (!found) {
                printf("FAIL: could not find any domain groups\n");
                return 1;
        }

        /* Test stopping getgrent in the middle of a set of users */

        endgrent();

        /* Test setgrent() without any getgrent() calls */

        setgrent();

        for (i = 0; i < (num_users - 1); i++) {
                getgrent();
        }

        endgrent();

        /* Test lots of setgrent() calls */

        for (i = 0; i < 100; i++) {
                setgrent();
        }

        /* Test lots of endgrent() calls */

        for (i = 0; i < 100; i++) {
                endgrent();
        }

        /* Everything's cool */

        printf("PASS\n");
        return 0;
}