Open Source Software

lutimes(3)



NAME

   futimes, lutimes - change file timestamps

SYNOPSIS

   #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

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 filename 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 appropriately.

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.

VERSIONS

   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.

ATTRIBUTES

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

   ┌─────────────────────┬───────────────┬─────────┐
   │Interface            │ Attribute     │ Value   │
   ├─────────────────────┼───────────────┼─────────┤
   │futimes(), lutimes() │ Thread safety │ MT-Safe │
   └─────────────────────┴───────────────┴─────────┘

CONFORMING TO

   These  functions  are not specified in any standard.  Other than Linux,
   they are available only on the BSDs.

SEE ALSO

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

COLOPHON

   This page is part of release 4.09 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/.



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