futimes(3) — Linux manual page


futimes(3)              Library Functions Manual              futimes(3)

NAME         top

       futimes, lutimes - change file timestamps

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #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

       futimes(), lutimes():
           Since glibc 2.19:
           glibc 2.19 and earlier:

DESCRIPTION         top

       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         top

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

ERRORS         top

       Errors are as for utimes(2), with the following additions for

       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         top

       For an explanation of the terms used in this section, see
       │ Interface                           Attribute     Value   │
       │ futimes(), lutimes()                │ Thread safety │ MT-Safe │

STANDARDS         top

       Linux, BSD.

HISTORY         top

              glibc 2.3.

              glibc 2.6.

NOTES         top

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

SEE ALSO         top

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

COLOPHON         top

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Linux man-pages 6.9.1          2024-05-02                     futimes(3)

Pages that refer to this page: futimesat(2)utime(2)utimensat(2)timeval(3type)symlink(7)