1 /* modechange.h -- definitions for file mode manipulation
2 Copyright (C) 1989, 1990, 1997 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Masks for the `flags' field in a `struct mode_change'. */
20 /* Affect the execute bits only if at least one execute bit is set already,
21 or if the file is a directory. */
22 #define MODE_X_IF_ANY_X 01
24 /* If set, copy some existing permissions for u, g, or o onto the other two.
25 Which of u, g, or o is copied is determined by which bits are set in the
27 #define MODE_COPY_EXISTING 02
31 char op; /* One of "=+-". */
32 char flags; /* Special operations. */
33 unsigned short affected; /* Set for u/g/o/s/s/t, if to be affected. */
34 unsigned short value; /* Bits to add/remove. */
35 struct mode_change *next; /* Link to next change in list. */
38 /* Masks for mode_compile argument. */
39 #define MODE_MASK_EQUALS 1
40 #define MODE_MASK_PLUS 2
41 #define MODE_MASK_MINUS 4
42 #define MODE_MASK_ALL (MODE_MASK_EQUALS | MODE_MASK_PLUS | MODE_MASK_MINUS)
44 /* Error return values for mode_compile. */
45 #define MODE_INVALID (struct mode_change *) 0
46 #define MODE_MEMORY_EXHAUSTED (struct mode_change *) 1
47 #define MODE_BAD_REFERENCE (struct mode_change *) 2
50 # if defined (__GNUC__) || (defined (__STDC__) && __STDC__)
51 # define __P(Args) Args
57 struct mode_change *mode_compile __P ((const char *, unsigned));
58 struct mode_change *mode_create_from_ref __P ((const char *));
59 unsigned short mode_adjust __P ((unsigned, const struct mode_change *));
60 void mode_free __P ((struct mode_change *));