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