FUTIMES(3) Linux Programmer's Manual FUTIMES(3)
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)):
futimes(), lutimes(): _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 speci-
fied 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.
Multithreading (see pthreads(7))
The futimes() and lutimes() functions are thread-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)
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Linux 2013-10-29 FUTIMES(3)