1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 #include <sys/types.h>
31 #include <sys/stat.h>
32 #include <stdio.h>
33 #include <ctype.h>
34 #include <grp.h>
35 #include <unistd.h>
36 #include <string.h>
37 #include <userdefs.h>
38 #include <stdlib.h>
39 #include "users.h"
40 #include "messages.h"
41
42 /* lint error-killers: */
43 int errmsg(int, int);
44
45 /* Delete a group from the GROUP file */
46 int
del_group(char * group)47 del_group(char *group)
48 {
49 int deleted;
50 FILE *e_fptr, *t_fptr;
51 struct group *grpstruct;
52 char tname[] = "/etc/gtmp.XXXXXX";
53 int fd;
54 struct stat sbuf;
55 boolean_t haserr;
56 int line = 1;
57
58 if ((e_fptr = fopen(GROUP, "r")) == NULL)
59 return (EX_UPDATE);
60
61 if (fstat(fileno(e_fptr), &sbuf) != 0)
62 return (EX_UPDATE);
63
64 if ((fd = mkstemp(tname)) == -1)
65 return (EX_UPDATE);
66
67 if ((t_fptr = fdopen(fd, "w")) == NULL) {
68 (void) close(fd);
69 (void) unlink(tname);
70 return (EX_UPDATE);
71 }
72
73 /*
74 * Get ownership and permissions correct
75 */
76
77 if (fchmod(fd, sbuf.st_mode) != 0 ||
78 fchown(fd, sbuf.st_uid, sbuf.st_gid) != 0) {
79 (void) fclose(t_fptr);
80 (void) unlink(tname);
81 return (EX_UPDATE);
82 }
83
84 /* loop thru GROUP looking for the one to delete */
85 deleted = 0;
86
87 while ((grpstruct = fgetgrent(e_fptr)) != NULL) {
88
89 /* check to see if group is one to delete */
90 if (strcmp(grpstruct->gr_name, group) == 0)
91 deleted = 1;
92 else
93 putgrent(grpstruct, t_fptr);
94 line++;
95 }
96
97 haserr = !feof(e_fptr);
98
99 if (haserr)
100 errmsg(M_SYNTAX, line);
101
102 (void) fclose(e_fptr);
103
104 if (fclose(t_fptr) != 0 || haserr) {
105 /* GROUP file contains bad entries or write failed. */
106 (void) unlink(tname);
107 return (EX_UPDATE);
108 }
109
110 /* If deleted, update GROUP file */
111 if (deleted) {
112 if (rename(tname, GROUP) != 0) {
113 (void) unlink(tname);
114 return (EX_UPDATE);
115 }
116 return (EX_SUCCESS);
117 } else {
118 (void) unlink(tname);
119 return (EX_NAME_NOT_EXIST);
120 }
121 }
122