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3762
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1 /* acl.c - access control lists |
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2 |
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3 Copyright (C) 2002 Free Software Foundation, Inc. |
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4 |
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5 This program is free software; you can redistribute it and/or modify |
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6 it under the terms of the GNU General Public License as published by |
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7 the Free Software Foundation; either version 2, or (at your option) |
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8 any later version. |
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9 |
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10 This program is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 GNU General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU General Public License |
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16 along with this program; if not, write to the Free Software Foundation, |
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17 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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18 |
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19 Written by Paul Eggert. */ |
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20 |
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21 #if HAVE_CONFIG_H |
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22 # include <config.h> |
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23 #endif |
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24 |
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25 #include <sys/stat.h> |
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26 #ifndef S_ISLNK |
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27 # define S_ISLNK(Mode) 0 |
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28 #endif |
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29 |
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30 #include "acl.h" |
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31 |
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32 #include <errno.h> |
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33 #ifndef ENOSYS |
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34 # define ENOSYS (-1) |
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35 #endif |
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36 |
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37 #ifndef MIN_ACL_ENTRIES |
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38 # define MIN_ACL_ENTRIES 4 |
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39 #endif |
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40 |
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41 /* Return 1 if PATH has a nontrivial access control list, 0 if not, |
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42 and -1 (setting errno) if an error is encountered. */ |
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43 |
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44 int |
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45 file_has_acl (char const *path, struct stat const *pathstat) |
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46 { |
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47 /* FIXME: This implementation should work on recent-enough versions |
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48 of HP-UX, Solaris, and Unixware, but it simply returns 0 with |
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49 POSIX 1003.1e (draft 17 -- abandoned), AIX, GNU/Linux, Irix, and |
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50 Tru64. Please see Samba's source/lib/sysacls.c file for |
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51 fix-related ideas. */ |
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52 |
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53 #if HAVE_ACL && defined GETACLCNT |
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54 if (! S_ISLNK (pathstat->st_mode)) |
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55 { |
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56 int n = acl (path, GETACLCNT, 0, NULL); |
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57 return n < 0 ? (errno == ENOSYS ? 0 : -1) : (MIN_ACL_ENTRIES < n); |
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58 } |
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59 #endif |
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60 |
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61 return 0; |
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62 } |
