| 1 | /* fstat() replacement. |
| 2 | Copyright (C) 2011-2020 Free Software Foundation, Inc. |
| 3 | |
| 4 | This program is free software: you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 3 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| 16 | |
| 17 | /* If the user's config.h happens to include <sys/stat.h>, let it include only |
| 18 | the system's <sys/stat.h> here, so that orig_fstat doesn't recurse to |
| 19 | rpl_fstat. */ |
| 20 | #define __need_system_sys_stat_h |
| 21 | #include <config.h> |
| 22 | |
| 23 | /* Get the original definition of fstat. It might be defined as a macro. */ |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/stat.h> |
| 26 | #undef __need_system_sys_stat_h |
| 27 | |
| 28 | #if defined _WIN32 && ! defined __CYGWIN__ |
| 29 | # define WINDOWS_NATIVE |
| 30 | #endif |
| 31 | |
| 32 | #if !defined WINDOWS_NATIVE |
| 33 | |
| 34 | static int |
| 35 | orig_fstat (int fd, struct stat *buf) |
| 36 | { |
| 37 | return fstat (fd, buf); |
| 38 | } |
| 39 | |
| 40 | #endif |
| 41 | |
| 42 | /* Specification. */ |
| 43 | #ifdef __osf__ |
| 44 | /* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc |
| 45 | eliminates this include because of the preliminary #include <sys/stat.h> |
| 46 | above. */ |
| 47 | # include "sys/stat.h" |
| 48 | #else |
| 49 | # include <sys/stat.h> |
| 50 | #endif |
| 51 | |
| 52 | #include "stat-time.h" |
| 53 | |
| 54 | #include <errno.h> |
| 55 | #include <unistd.h> |
| 56 | #ifdef WINDOWS_NATIVE |
| 57 | # define WIN32_LEAN_AND_MEAN |
| 58 | # include <windows.h> |
| 59 | # if GNULIB_MSVC_NOTHROW |
| 60 | # include "msvc-nothrow.h" |
| 61 | # else |
| 62 | # include <io.h> |
| 63 | # endif |
| 64 | # include "stat-w32.h" |
| 65 | #endif |
| 66 | |
| 67 | int |
| 68 | rpl_fstat (int fd, struct stat *buf) |
| 69 | { |
| 70 | #if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY |
| 71 | /* Handle the case when rpl_open() used a dummy file descriptor to work |
| 72 | around an open() that can't normally visit directories. */ |
| 73 | const char *name = _gl_directory_name (fd); |
| 74 | if (name != NULL) |
| 75 | return stat (name, buf); |
| 76 | #endif |
| 77 | |
| 78 | #ifdef WINDOWS_NATIVE |
| 79 | /* Fill the fields ourselves, because the original fstat function returns |
| 80 | values for st_atime, st_mtime, st_ctime that depend on the current time |
| 81 | zone. See |
| 82 | <https://lists.gnu.org/r/bug-gnulib/2017-04/msg00134.html> */ |
| 83 | HANDLE h = (HANDLE) _get_osfhandle (fd); |
| 84 | |
| 85 | if (h == INVALID_HANDLE_VALUE) |
| 86 | { |
| 87 | errno = EBADF; |
| 88 | return -1; |
| 89 | } |
| 90 | return _gl_fstat_by_handle (h, NULL, buf); |
| 91 | #else |
| 92 | return stat_time_normalize (orig_fstat (fd, buf), buf); |
| 93 | #endif |
| 94 | } |