FUTIMES(3) manual page
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futimes, lutimes - change file timestamps
#include <sys/time.h>int futimes(int fd, const struct timeval tv[2]);int lutimes(const
char *filename, const struct timeval tv[2]);
Feature Test Macro Requirements
for glibc (see feature_test_macros(7)
):
futimes(), lutimes(): _BSD_SOURCE
futimes() changes the access and modification times of a file
in the same way as utimes(2)
, with the difference that the file whose timestamps
are to be changed is specified via a file descriptor, fd, rather than via
a pathname.
lutimes() changes the access and modification times of a file
in the same way as utimes(2)
, with the difference that if filename refers
to a symbolic link, then the link is not dereferenced: instead, the timestamps
of the symbolic link are changed.
On success, zero is returned.
On error, -1 is returned, and errno is set appropriately.
Errors are
as for utimes(2)
, with the following additions for futimes():
- EBADF
- fd
is not a valid file descriptor.
- ENOSYS
- The /proc filesystem could not be
accessed.
The following additional error may occur for lutimes():
- ENOSYS
- The kernel does not support this call; Linux 2.6.22 or later is required.
futimes() is available since glibc 2.3. lutimes() is available since
glibc 2.6, and is implemented using the utimensat(2)
system call, which
is supported since kernel 2.6.22.
The
futimes() and lutimes() functions are thread-safe.
These functions
are not specified in any standard. Other than Linux, they are available
only on the BSDs.
utime(2)
, utimensat(2)
, symlink(7)
This
page is part of release 3.78 of the Linux man-pages project. A description
of the project, information about reporting bugs, and the latest version
of this page, can be found at http://www.kernel.org/doc/man-pages/.
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