1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) many different people. If you wrote this, please
6 * acknowledge your work.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
28 /* This function parses the sort of string you might pass
29 * to chmod (i.e., [ugoa]{+|-|=}[rwxst] ) and returns the
30 * correct mode described by the string. */
31 extern int parse_mode(const char *s, mode_t * theMode)
33 static const mode_t group_set[] = {
34 S_ISUID | S_IRWXU, /* u */
35 S_ISGID | S_IRWXG, /* g */
37 S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO /* a */
40 static const mode_t mode_set[] = {
41 S_IRUSR | S_IRGRP | S_IROTH, /* r */
42 S_IWUSR | S_IWGRP | S_IWOTH, /* w */
43 S_IXUSR | S_IXGRP | S_IXOTH, /* x */
44 S_ISUID | S_ISGID, /* s */
48 static const char group_chars[] = "ugoa";
49 static const char mode_chars[] = "rwxst";
54 S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
69 if ((c = *s++) == '\0') {
72 for (p = group_chars; *p; p++) {
74 groups |= group_set[(int)(p - group_chars)];
83 if (groups == 0) { /* The default is "all" */
84 groups |= S_ISUID | S_ISGID | S_ISVTX
85 | S_IRWXU | S_IRWXG | S_IRWXO;
89 if ((c < '0') || (c > '7') || (mode | groups)) {
92 *theMode = strtol(--s, NULL, 8);
98 if (((c = *s++) != '\0') && (c != ',')) {
99 for (p = mode_chars; *p; p++) {
101 mode |= mode_set[(int)(p - mode_chars)];
105 break; /* We're done so break out of loop. */
109 andMode &= ~(groups); /* Now fall through. */
111 orMode |= mode & groups;
114 andMode &= ~(mode & groups);
115 orMode &= ~(mode & groups);
129 c-file-style: "linux"