17c478bdstevel@tonic-gate/*
27c478bdstevel@tonic-gate * CDDL HEADER START
37c478bdstevel@tonic-gate *
47c478bdstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bdstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bdstevel@tonic-gate * (the "License").  You may not use this file except in compliance
77c478bdstevel@tonic-gate * with the License.
87c478bdstevel@tonic-gate *
97c478bdstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bdstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bdstevel@tonic-gate * See the License for the specific language governing permissions
127c478bdstevel@tonic-gate * and limitations under the License.
137c478bdstevel@tonic-gate *
147c478bdstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bdstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bdstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bdstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bdstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bdstevel@tonic-gate *
207c478bdstevel@tonic-gate * CDDL HEADER END
217c478bdstevel@tonic-gate */
227c478bdstevel@tonic-gate/*
237c478bdstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
247c478bdstevel@tonic-gate * Use is subject to license terms.
257c478bdstevel@tonic-gate */
267c478bdstevel@tonic-gate
277c478bdstevel@tonic-gate/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
287c478bdstevel@tonic-gate/*	  All Rights Reserved  	*/
297c478bdstevel@tonic-gate
307c478bdstevel@tonic-gate
317c478bdstevel@tonic-gate#pragma ident	"%Z%%M%	%I%	%E% SMI"
327c478bdstevel@tonic-gate
337c478bdstevel@tonic-gate#include <sys/types.h>
347c478bdstevel@tonic-gate#include <stdio.h>
357c478bdstevel@tonic-gate#include <ctype.h>
367c478bdstevel@tonic-gate#include <grp.h>
377c478bdstevel@tonic-gate#include <sys/stat.h>
387c478bdstevel@tonic-gate#include <unistd.h>
397c478bdstevel@tonic-gate#include <userdefs.h>
407c478bdstevel@tonic-gate#include <strings.h>
417c478bdstevel@tonic-gate#include <stdlib.h>
427c478bdstevel@tonic-gate#include "users.h"
437c478bdstevel@tonic-gate#include "messages.h"
447c478bdstevel@tonic-gate
457c478bdstevel@tonic-gate/* lint error-killers: */
467c478bdstevel@tonic-gatevoid errmsg(int, int);
477c478bdstevel@tonic-gate
487c478bdstevel@tonic-gate/* Modify group to new gid and/or new name */
497c478bdstevel@tonic-gateint
507c478bdstevel@tonic-gatemod_group(char *group, gid_t gid, char *newgroup)
517c478bdstevel@tonic-gate{
527c478bdstevel@tonic-gate	int modified = 0;
537c478bdstevel@tonic-gate	int fd;
547c478bdstevel@tonic-gate	char tname[] = "/etc/gtmp.XXXXXX";
557c478bdstevel@tonic-gate	FILE *e_fptr, *t_fptr;
567c478bdstevel@tonic-gate	struct group *g_ptr;
577c478bdstevel@tonic-gate	struct stat sbuf;
587c478bdstevel@tonic-gate	boolean_t haserr;
597c478bdstevel@tonic-gate	int line = 1;
607c478bdstevel@tonic-gate
617c478bdstevel@tonic-gate	if ((e_fptr = fopen(GROUP, "r")) == NULL)
627c478bdstevel@tonic-gate		return (EX_UPDATE);
637c478bdstevel@tonic-gate
647c478bdstevel@tonic-gate	if (fstat(fileno(e_fptr), &sbuf) != 0)
657c478bdstevel@tonic-gate		return (EX_UPDATE);
667c478bdstevel@tonic-gate
677c478bdstevel@tonic-gate	if ((fd = mkstemp(tname)) == -1)
687c478bdstevel@tonic-gate		return (EX_UPDATE);
697c478bdstevel@tonic-gate
707c478bdstevel@tonic-gate	if ((t_fptr = fdopen(fd, "w")) == NULL) {
717c478bdstevel@tonic-gate		(void) close(fd);
727c478bdstevel@tonic-gate		(void) unlink(tname);
737c478bdstevel@tonic-gate		return (EX_UPDATE);
747c478bdstevel@tonic-gate	}
757c478bdstevel@tonic-gate
767c478bdstevel@tonic-gate	/*
777c478bdstevel@tonic-gate	 * Get ownership and permissions correct
787c478bdstevel@tonic-gate	 */
797c478bdstevel@tonic-gate
807c478bdstevel@tonic-gate	if (fchmod(fd, sbuf.st_mode) != 0 ||
817c478bdstevel@tonic-gate	    fchown(fd, sbuf.st_uid, sbuf.st_gid) != 0) {
827c478bdstevel@tonic-gate		(void) fclose(t_fptr);
837c478bdstevel@tonic-gate		(void) unlink(tname);
847c478bdstevel@tonic-gate		return (EX_UPDATE);
857c478bdstevel@tonic-gate	}
867c478bdstevel@tonic-gate
877c478bdstevel@tonic-gate	while ((g_ptr = fgetgrent(e_fptr)) != NULL) {
887c478bdstevel@tonic-gate
897c478bdstevel@tonic-gate		/* check to see if group is one to modify */
907c478bdstevel@tonic-gate		if (strcmp(g_ptr->gr_name, group) == 0) {
917c478bdstevel@tonic-gate			if (newgroup != NULL)
927c478bdstevel@tonic-gate				g_ptr->gr_name = newgroup;
937c478bdstevel@tonic-gate			if (gid != -1)
947c478bdstevel@tonic-gate				g_ptr->gr_gid = gid;
957c478bdstevel@tonic-gate			modified++;
967c478bdstevel@tonic-gate		}
977c478bdstevel@tonic-gate		putgrent(g_ptr, t_fptr);
987c478bdstevel@tonic-gate		line++;
997c478bdstevel@tonic-gate	}
1007c478bdstevel@tonic-gate
1017c478bdstevel@tonic-gate	haserr = !feof(e_fptr);
1027c478bdstevel@tonic-gate	if (haserr)
1037c478bdstevel@tonic-gate		errmsg(M_SYNTAX, line);
1047c478bdstevel@tonic-gate
1057c478bdstevel@tonic-gate	(void) fclose(e_fptr);
1067c478bdstevel@tonic-gate
1077c478bdstevel@tonic-gate	if (fclose(t_fptr) != 0 || haserr) {
1087c478bdstevel@tonic-gate		/* GROUP file contains bad entries or write failed. */
1097c478bdstevel@tonic-gate		(void) unlink(tname);
1107c478bdstevel@tonic-gate		return (EX_UPDATE);
1117c478bdstevel@tonic-gate	}
1127c478bdstevel@tonic-gate
1137c478bdstevel@tonic-gate	if (modified) {
1147c478bdstevel@tonic-gate		if (rename(tname, GROUP) != 0) {
1157c478bdstevel@tonic-gate			(void) unlink(tname);
1167c478bdstevel@tonic-gate			return (EX_UPDATE);
1177c478bdstevel@tonic-gate		}
1187c478bdstevel@tonic-gate		return (EX_SUCCESS);
1197c478bdstevel@tonic-gate	} else {
1207c478bdstevel@tonic-gate		(void) unlink(tname);
1217c478bdstevel@tonic-gate		return (EX_NAME_NOT_EXIST);
1227c478bdstevel@tonic-gate	}
1237c478bdstevel@tonic-gate}
124