xref: /titanic_50/usr/src/cmd/oamuser/group/del_group.c (revision 5c51f1241dbbdf2656d0e10011981411ed0c9673)
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 
31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
32 
33 #include <sys/types.h>
34 #include <sys/stat.h>
35 #include <stdio.h>
36 #include <ctype.h>
37 #include <grp.h>
38 #include <unistd.h>
39 #include <string.h>
40 #include <userdefs.h>
41 #include <stdlib.h>
42 #include "users.h"
43 #include "messages.h"
44 
45 /* lint error-killers: */
46 int errmsg(int, int);
47 
48 /* Delete a group from the GROUP file */
49 int
50 del_group(char *group)
51 {
52 	int deleted;
53 	FILE *e_fptr, *t_fptr;
54 	struct group *grpstruct;
55 	char tname[] = "/etc/gtmp.XXXXXX";
56 	int fd;
57 	struct stat sbuf;
58 	boolean_t haserr;
59 	int line = 1;
60 
61 	if ((e_fptr = fopen(GROUP, "r")) == NULL)
62 		return (EX_UPDATE);
63 
64 	if (fstat(fileno(e_fptr), &sbuf) != 0)
65 		return (EX_UPDATE);
66 
67 	if ((fd = mkstemp(tname)) == -1)
68 		return (EX_UPDATE);
69 
70 	if ((t_fptr = fdopen(fd, "w")) == NULL) {
71 		(void) close(fd);
72 		(void) unlink(tname);
73 		return (EX_UPDATE);
74 	}
75 
76 	/*
77 	 * Get ownership and permissions correct
78 	 */
79 
80 	if (fchmod(fd, sbuf.st_mode) != 0 ||
81 	    fchown(fd, sbuf.st_uid, sbuf.st_gid) != 0) {
82 		(void) fclose(t_fptr);
83 		(void) unlink(tname);
84 		return (EX_UPDATE);
85 	}
86 
87 	/* loop thru GROUP looking for the one to delete */
88 	deleted = 0;
89 
90 	while ((grpstruct = fgetgrent(e_fptr)) != NULL) {
91 
92 		/* check to see if group is one to delete */
93 		if (strcmp(grpstruct->gr_name, group) == 0)
94 			deleted = 1;
95 		else
96 			putgrent(grpstruct, t_fptr);
97 		line++;
98 	}
99 
100 	haserr = !feof(e_fptr);
101 
102 	if (haserr)
103 		errmsg(M_SYNTAX, line);
104 
105 	(void) fclose(e_fptr);
106 
107 	if (fclose(t_fptr) != 0 || haserr) {
108 		/* GROUP file contains bad entries or write failed. */
109 		(void) unlink(tname);
110 		return (EX_UPDATE);
111 	}
112 
113 	/* If deleted, update GROUP file */
114 	if (deleted) {
115 		if (rename(tname, GROUP) != 0) {
116 			(void) unlink(tname);
117 			return (EX_UPDATE);
118 		}
119 		return (EX_SUCCESS);
120 	} else {
121 		(void) unlink(tname);
122 		return (EX_NAME_NOT_EXIST);
123 	}
124 }
125