futimes, lutimes - change file timestamps
int futimes(int fd, const struct timeval tv);
int lutimes(const char *filename, const struct timeval tv);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
Since glibc 2.19:
Glibc 2.19 and earlier:
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
Errors are as for utimes(2), with the following additions for
- fd is not a valid file descriptor.
- The /proc filesystem could not be accessed.
The following additional error may occur for lutimes():
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).
- The kernel does not support this call; Linux 2.6.22 or later is
These functions are not specified in any standard. Other than Linux, they are
available only on the BSDs.
This page is part of release 5.03 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 https://www.kernel.org/doc/man-pages/.
|futimes (), lutimes ()