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comparison toys/posix/chmod.c @ 653:2986aa63a021

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Move commands into "posix", "lsb", and "other" menus/directories.
author Rob Landley <rob@landley.net>
date Sat, 25 Aug 2012 14:25:22 -0500
parents toys/chmod.c@a6a541b7fc34
children 6df4ccc0acbe
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652:2d7c56913fda 653:2986aa63a021
1 /* vi: set sw=4 ts=4:
2 *
3 * chmod.c - Change file mode bits
4 *
5 * Copyright 2012 Rob Landley <rob@landley.net>
6 *
7 * See http://pubs.opengroup.org/onlinepubs/009695399/utilities/chmod.html
8 *
9
10 USE_CHMOD(NEWTOY(chmod, "<2?vR", TOYFLAG_BIN))
11
12 config CHMOD
13 bool "chmod"
14 default y
15 help
16 usage: chmod [-R] MODE FILE...
17
18 Change mode of listed file[s] (recursively with -R).
19
20 MODE can be (comma-separated) stanzas: [ugoa][+-=][rwxstXugo]
21
22 Stanzas are applied in order: For each category (u = user,
23 g = group, o = other, a = all three, if none specified default is a),
24 set (+), clear (-), or copy (=), r = read, w = write, x = execute.
25 s = u+s = suid, g+s = sgid, o+s = sticky. (+t is an alias for o+s).
26 suid/sgid: execute as the user/group who owns the file.
27 sticky: can't delete files you don't own out of this directory
28 X = x for directories or if any category already has x set.
29
30 Or MODE can be an octal value up to 7777 ug uuugggooo top +
31 bit 1 = o+x, bit 1<<8 = u+w, 1<<11 = g+1 sstrwxrwxrwx bottom
32
33 Examples:
34 chmod u+w file - allow owner of "file" to write to it.
35 chmod 744 file - user can read/write/execute, everyone else read only
36 */
37
38 #include "toys.h"
39
40 DEFINE_GLOBALS(
41 char *mode;
42 )
43
44 #define TT this.chmod
45
46 #define FLAG_R 1
47 #define FLAG_v 2
48
49 int do_chmod(struct dirtree *try)
50 {
51 mode_t mode;
52
53 if (!dirtree_notdotdot(try)) return 0;
54
55 mode = string_to_mode(TT.mode, try->st.st_mode);
56 if (toys.optflags & FLAG_v) {
57 char *s = dirtree_path(try, 0);
58 printf("chmod '%s' to %04o\n", s, mode);
59 free(s);
60 }
61 wfchmodat(dirtree_parentfd(try), try->name, mode);
62
63 return (toys.optflags & FLAG_R) ? DIRTREE_RECURSE : 0;
64 }
65
66 void chmod_main(void)
67 {
68 TT.mode = *toys.optargs;
69 char **file;
70
71 for (file = toys.optargs+1; *file; file++) dirtree_read(*file, do_chmod);
72 }