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():
Since glibc 2.19:
_DEFAULT_SOURCE
Glibc 2.19 and earlier:
_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.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| futimes (), lutimes () |
Thread safety |
MT-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)