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 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
23 /* All Rights Reserved */
24
25
26 /*
27 * Copyright (c) 2001 by Sun Microsystems, Inc.
28 * All rights reserved.
29 */
30
31 /*
32 * NAME
33 * legal - check existence of file
34 *
35 * SYNOPSIS
36 * int legal(char *file)
37 *
38 * DESCRIPTION
39 * legal() checks to see if "file" is a writable file name.
40 *
41 * Returns:
42 * 0 -> file or directory exists, but is unwriteable
43 * 1 -> file exists writeable
44 * 2 -> file does not exist, but can be created
45 */
46
47 #include "mail.h"
48 int
legal(file)49 legal(file)
50 register char *file;
51 {
52 register char *sp;
53 char dfile[MAXFILENAME];
54
55 /*
56 * If file does not exist then try "." if file name has
57 * no "/". For file names that have a "/", try check
58 * for existence of previous directory.
59 */
60 if (access(file, A_EXIST) == A_OK) {
61 if (access(file, A_WRITE) == A_OK)
62 return (1);
63 else return (0);
64 } else {
65 if ((sp = strrchr(file, '/')) == NULL) {
66 strcpy(dfile, ".");
67 } else if (sp == file) {
68 strcpy(dfile, "/");
69 } else {
70 if ((sp - file + 1) > MAXFILENAME)
71 return (0);
72 strncpy(dfile, file, sp - file);
73 dfile[sp - file] = '\0';
74 }
75 if (access(dfile, A_WRITE) == CERROR)
76 return (0);
77 return (2);
78 }
79 }
80