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1 /* modechange.h -- definitions for file mode manipulation |
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2 Copyright (C) 1989, 1990 Free Software Foundation, Inc. |
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3 |
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4 This program is free software; you can redistribute it and/or modify |
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5 it under the terms of the GNU General Public License as published by |
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6 the Free Software Foundation; either version 2, or (at your option) |
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7 any later version. |
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8 |
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9 This program is distributed in the hope that it will be useful, |
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 GNU General Public License for more details. |
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13 |
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14 You should have received a copy of the GNU General Public License |
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15 along with this program; if not, write to the Free Software |
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16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
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17 |
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18 /* Masks for the `flags' field in a `struct mode_change'. */ |
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19 |
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20 /* Affect the execute bits only if at least one execute bit is set already, |
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21 or if the file is a directory. */ |
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22 #define MODE_X_IF_ANY_X 01 |
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23 |
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24 /* If set, copy some existing permissions for u, g, or o onto the other two. |
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25 Which of u, g, or o is copied is determined by which bits are set in the |
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26 `value' field. */ |
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27 #define MODE_COPY_EXISTING 02 |
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28 |
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29 struct mode_change |
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30 { |
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31 char op; /* One of "=+-". */ |
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32 char flags; /* Special operations. */ |
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33 unsigned short affected; /* Set for u/g/o/s/s/t, if to be affected. */ |
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34 unsigned short value; /* Bits to add/remove. */ |
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35 struct mode_change *next; /* Link to next change in list. */ |
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36 }; |
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37 |
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38 /* Masks for mode_compile argument. */ |
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39 #define MODE_MASK_EQUALS 1 |
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40 #define MODE_MASK_PLUS 2 |
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41 #define MODE_MASK_MINUS 4 |
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42 |
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43 /* Error return values for mode_compile. */ |
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44 #define MODE_INVALID (struct mode_change *) 0 |
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45 #define MODE_MEMORY_EXHAUSTED (struct mode_change *) 1 |
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46 |
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47 #ifdef __STDC__ |
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48 struct mode_change *mode_compile (char *, unsigned); |
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49 unsigned short mode_adjust (unsigned, struct mode_change *); |
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50 void mode_free (struct mode_change *); |
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51 #else |
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52 struct mode_change *mode_compile (); |
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53 unsigned short mode_adjust (); |
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54 void mode_free (); |
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55 #endif |
