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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON |
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FUTIMES(3) Linux Programmer's Manual FUTIMES(3)
futimes, lutimes - change file timestamps
#include <sys/time.h>
int futimes(int fd, const struct timeval tv[2]);
int lutimes(const char *filename, 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
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 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.
For an explanation of the terms used in this section, see
attributes(7).
┌─────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├─────────────────────┼───────────────┼─────────┤
│futimes(), lutimes() │ Thread safety │ MT-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)
This page is part of release 5.10 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/.
Linux 2017-09-15 FUTIMES(3)
Pages that refer to this page: futimesat(2), utime(2), utimensat(2), symlink(7), system_data_types(7)
Copyright and license for this manual page
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