NAME¶

futimes, lutimes - change file timestamps

LIBRARY¶

Standard C library (libc, -lc)

SYNOPSIS¶

#include <sys/time.h>

int futimes(int fd, const struct timeval tv[2]);
int lutimes(const char *filename, const struct timeval tv[2]);

futimes(), lutimes():

    Since glibc 2.19:


        _DEFAULT_SOURCE


    glibc 2.19 and earlier:


        _BSD_SOURCE

DESCRIPTION¶

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.

RETURN VALUE¶

On success, zero is returned. On error, -1 is returned, and errno is set to indicate the error.

ERRORS¶

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.

VERSIONS¶

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 Linux 2.6.22.

ATTRIBUTES¶

For an explanation of the terms used in this section, see attributes(7).

STANDARDS¶

These functions are not specified in any standard. Other than Linux, they are available only on the BSDs.

SEE ALSO¶

utime(2), utimensat(2), symlink(7)