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15781
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1 /* fstat() replacement. |
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2 Copyright (C) 2011 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 3 of the License, or |
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7 (at your option) 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, see <http://www.gnu.org/licenses/>. */ |
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16 |
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17 /* If the user's config.h happens to include <sys/stat.h>, let it include only |
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18 the system's <sys/stat.h> here, so that orig_fstat doesn't recurse to |
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19 rpl_fstat. */ |
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20 #define __need_system_sys_stat_h |
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21 #include <config.h> |
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22 |
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23 /* Get the original definition of fstat. It might be defined as a macro. */ |
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24 #include <sys/types.h> |
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25 #include <sys/stat.h> |
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26 #undef __need_system_sys_stat_h |
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27 |
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28 static inline int |
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29 orig_fstat (int fd, struct stat *buf) |
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30 { |
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31 return fstat (fd, buf); |
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32 } |
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33 |
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34 /* Specification. */ |
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35 /* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc |
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36 eliminates this include because of the preliminary #include <sys/stat.h> |
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37 above. */ |
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38 #include "sys/stat.h" |
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39 |
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40 #include <errno.h> |
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41 #include <unistd.h> |
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42 |
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43 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER |
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44 # include "msvc-inval.h" |
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45 #endif |
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46 |
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47 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER |
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48 static inline int |
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49 fstat_nothrow (int fd, struct stat *buf) |
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50 { |
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51 int result; |
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52 |
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53 TRY_MSVC_INVAL |
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54 { |
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55 result = orig_fstat (fd, buf); |
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56 } |
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57 CATCH_MSVC_INVAL |
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58 { |
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59 result = -1; |
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60 errno = EBADF; |
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61 } |
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62 DONE_MSVC_INVAL; |
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63 |
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64 return result; |
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65 } |
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66 #else |
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67 # define fstat_nothrow orig_fstat |
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68 #endif |
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69 |
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70 int |
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71 rpl_fstat (int fd, struct stat *buf) |
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72 { |
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73 #if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY |
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74 /* Handle the case when rpl_open() used a dummy file descriptor to work |
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75 around an open() that can't normally visit directories. */ |
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76 const char *name = _gl_directory_name (fd); |
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77 if (name != NULL) |
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78 return stat (name, buf); |
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79 #endif |
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80 |
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81 return fstat_nothrow (fd, buf); |
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82 } |
