58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
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/* Set file access and modification times.
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Copyright (C) 2009-2020 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3 of the License, or any
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later version.
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This program 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Eric Blake. */
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/* derived from a function in utimens.c */
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#include <config.h>
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#include "utimens.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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/* Set the access and modification timestamps of FD (a.k.a. FILE) to be
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TIMESPEC[0] and TIMESPEC[1], respectively; relative to directory DIR.
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FD must be either negative -- in which case it is ignored --
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or a file descriptor that is open on FILE.
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If FD is nonnegative, then FILE can be NULL, which means
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use just futimes (or equivalent) instead of utimes (or equivalent),
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and fail if on an old system without futimes (or equivalent).
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If TIMESPEC is null, set the timestamps to the current time.
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ATFLAG is passed to utimensat if FD is negative or futimens was
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unsupported, which can allow operation on FILE as a symlink.
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Return 0 on success, -1 (setting errno) on failure. */
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int
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fdutimensat (int fd, int dir, char const *file, struct timespec const ts[2],
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int atflag)
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{
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int result = 1;
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if (0 <= fd)
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result = futimens (fd, ts);
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if (file && (fd < 0 || (result == -1 && errno == ENOSYS)))
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result = utimensat (dir, file, ts, atflag);
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if (result == 1)
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{
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errno = EBADF;
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result = -1;
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}
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return result;
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}
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