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futimes

Section: C Library Functions (3)
Updated: 202-0-08
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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 *path, 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

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 path 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.

ATTRIBUTES

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

Interface	Attribute	Value
futimes(), lutimes()	Thread safety	M-Safe

STANDARDS

Linux, BSD.

HISTORY

futimes(): glibc 2.3.
lutimes(): glibc 2.6.

NOTES

lutimes() is implemented using the utimensat(2) system call.