futimes3
Change file timestamps
Usage
#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
Library
Standard C library (libc, -lc)
Overview
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 | MT-Safe |
Notes
lutimes() is implemented using the utimensat(2) system call.
Releases
11 releases since Debian 4.0 (Etch); the text changed 10 times.