94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* fstat() replacement.
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Copyright (C) 2011-2023 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* If the user's config.h happens to include <sys/stat.h>, let it include only
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the system's <sys/stat.h> here, so that orig_fstat doesn't recurse to
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rpl_fstat. */
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#define __need_system_sys_stat_h
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#include <config.h>
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/* Get the original definition of fstat. It might be defined as a macro. */
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#include <sys/types.h>
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#include <sys/stat.h>
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#undef __need_system_sys_stat_h
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#if defined _WIN32 && ! defined __CYGWIN__
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# define WINDOWS_NATIVE
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#endif
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#if !defined WINDOWS_NATIVE
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static int
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orig_fstat (int fd, struct stat *buf)
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{
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return fstat (fd, buf);
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}
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#endif
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/* Specification. */
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#ifdef __osf__
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/* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
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eliminates this include because of the preliminary #include <sys/stat.h>
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above. */
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# include "sys/stat.h"
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#else
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# include <sys/stat.h>
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#endif
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#include "stat-time.h"
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#include <errno.h>
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#include <unistd.h>
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#ifdef WINDOWS_NATIVE
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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# if GNULIB_MSVC_NOTHROW
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# include "msvc-nothrow.h"
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# else
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# include <io.h>
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# endif
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# include "stat-w32.h"
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#endif
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int
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rpl_fstat (int fd, struct stat *buf)
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{
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#if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY
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/* Handle the case when rpl_open() used a dummy file descriptor to work
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around an open() that can't normally visit directories. */
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const char *name = _gl_directory_name (fd);
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if (name != NULL)
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return stat (name, buf);
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#endif
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#ifdef WINDOWS_NATIVE
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/* Fill the fields ourselves, because the original fstat function returns
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values for st_atime, st_mtime, st_ctime that depend on the current time
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zone. See
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<https://lists.gnu.org/r/bug-gnulib/2017-04/msg00134.html> */
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HANDLE h = (HANDLE) _get_osfhandle (fd);
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if (h == INVALID_HANDLE_VALUE)
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{
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errno = EBADF;
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return -1;
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}
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return _gl_fstat_by_handle (h, NULL, buf);
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#else
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return stat_time_normalize (orig_fstat (fd, buf), buf);
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#endif
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}
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