UTIMES(2) BSD Programmer's Manual UTIMES(2)NAME
utimes, lutimes, futimes - set access and modification times of a file or
SYNOPSIS
#include <sys/time.h>
int
utimes(const char *file, const struct timeval *times);
int
lutimes(const char *file, const struct timeval *times);
int
futimes(int fd, const struct timeval *times);
DESCRIPTION
The access and modification times of the file named by path or referenced
by fd are changed as specified by the argument times. lutimes() operates
similarly to utimes() but does not follow symbolic links. It allows the
permission bits of a symbolic link to be set.
If times is NULL, the access and modification times are set to the
current time. The caller must be the owner of the file, have permission
to write the file, or be the superuser.
If times is non-null, it is assumed to point to an array of two timeval
structures. The access time is set to the value of the first element, and
the modification time is set to the value of the second element. The
caller must be the owner of the file or be the superuser.
In either case, the inode-change-time of the file is set to the current
time.
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a value
of -1 is returned and errno is set to indicate the error.
ERRORSutimes() or lutimes() will fail if:
[EACCES] Search permission is denied for a component of the path
prefix; or the times argument is NULL and the effective
user ID of the process does not match the owner of the
file, and is not the superuser, and write access is denied.
[EFAULT] File or times points outside the process's allocated ad-
dress space.
[EIO] An I/O error occurred while reading or writing the affected
inode.
[ELOOP] Too many symbolic links were encountered in translating the
pathname.
[ENAMETOOLONG]
A component of a pathname exceeded {NAME_MAX} characters,
or an entire path name exceeded {PATH_MAX} characters.
[ENOENT] The named file does not exist.
[ENOTDIR] A component of the path prefix is not a directory.
[EPERM] The times argument is not NULL and the calling process's
effective user ID does not match the owner of the file and
is not the superuser.
[EROFS] The file system containing the file is mounted read-only.
futimes() will fail if:
[EBADF] fd does not refer to a valid descriptor.
[EACCES] The times argument is NULL and the effective user ID of the
process does not match the owner of the file, and is not
the superuser, and write access is denied.
[EFAULT] times points outside the process's allocated address space.
[EIO] An I/O error occurred while reading or writing the affected
inode.
[EPERM] The times argument is not NULL and the calling process's
effective user ID does not match the owner of the file and
is not the superuser.
[EROFS] The file system containing the file is mounted read-only.
SEE ALSOstat(2), utime(3)HISTORY
The utimes() function call appeared in 4.2BSD. The futimes() function
call appeared in NetBSD 1.2. The lutimes() function call appeared in
MirOS #10.
MirOS BSD #10-current May 19, 2007 1
