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- /* modechange.h -- definitions for file mode manipulation
- Copyright (C) 1989, 1990 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Masks for the `flags' field in a `struct mode_change'. */
-
- /* Affect the execute bits only if at least one execute bit is set already,
- or if the file is a directory. */
- #define MODE_X_IF_ANY_X 01
-
- /* If set, copy some existing permissions for u, g, or o onto the other two.
- Which of u, g, or o is copied is determined by which bits are set in the
- `value' field. */
- #define MODE_COPY_EXISTING 02
-
- struct mode_change
- {
- char op; /* One of "=+-". */
- char flags; /* Special operations. */
- unsigned short affected; /* Set for u/g/o/s/s/t, if to be affected. */
- unsigned short value; /* Bits to add/remove. */
- struct mode_change *next; /* Link to next change in list. */
- };
-
- /* Masks for mode_compile argument. */
- #define MODE_MASK_EQUALS 1
- #define MODE_MASK_PLUS 2
- #define MODE_MASK_MINUS 4
-
- /* Error return values for mode_compile. */
- #define MODE_INVALID (struct mode_change *) 0
- #define MODE_MEMORY_EXHAUSTED (struct mode_change *) 1
-
- #ifdef __STDC__
- struct mode_change *mode_compile (char *, unsigned);
- unsigned short mode_adjust (unsigned, struct mode_change *);
- void mode_free (struct mode_change *);
- #else
- struct mode_change *mode_compile ();
- unsigned short mode_adjust ();
- void mode_free ();
- #endif
-