f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
259 lines
6.9 KiB
Groff
259 lines
6.9 KiB
Groff
.\" $NetBSD: utimes.2,v 1.30 2011/10/25 09:26:53 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 1990, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)utimes.2 8.1 (Berkeley) 6/4/93
|
|
.\"
|
|
.Dd August 17, 2011
|
|
.Dt UTIMES 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm utimes ,
|
|
.Nm lutimes ,
|
|
.Nm futimes ,
|
|
.Nm futimens ,
|
|
.Nm utimensat
|
|
.Nd set file access and modification times
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/time.h
|
|
.Ft int
|
|
.Fn utimes "const char *path" "const struct timeval times[2]"
|
|
.Ft int
|
|
.Fn lutimes "const char *path" "const struct timeval times[2]"
|
|
.Ft int
|
|
.Fn futimes "int fd" "const struct timeval times[2]"
|
|
.Ft int
|
|
.Fn futimens "int fd" "const struct timespec times[2]"
|
|
.Ft int
|
|
.Fn utimensat "int fd" "const char *path" "const struct timespec times[2]" "int flag"
|
|
.Sh DESCRIPTION
|
|
The access and modification times of the file named by
|
|
.Fa path
|
|
or referenced by
|
|
.Fa fd
|
|
are changed as specified by the argument
|
|
.Fa times .
|
|
.Pp
|
|
If
|
|
.Fa times
|
|
is
|
|
.Dv 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 super-user.
|
|
.Pp
|
|
If
|
|
.Fa times
|
|
is
|
|
.Pf non- Dv 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.
|
|
For file systems that support file birth (creation) times (such as
|
|
UFS2), the birth time will be set to the value of the second element
|
|
if the second element is older than the currently set birth time.
|
|
To set both a birth time and a modification time, two calls are
|
|
required; the first to set the birth time and the second to set
|
|
the (presumably newer) modification time.
|
|
Ideally a new system call will be added that allows the setting of
|
|
all three times at once.
|
|
The caller must be the owner of the file or be the super-user.
|
|
.Pp
|
|
In either case, the inode-change-time of the file is set to the current
|
|
time.
|
|
.Pp
|
|
.Fn lutimes
|
|
is like
|
|
.Fn utimes
|
|
except in the case where the named file is a symbolic link,
|
|
in which case
|
|
.Fn lutimes
|
|
changes the access and modification times of the link,
|
|
while
|
|
.Fn utimes
|
|
changes the times of the file the link references.
|
|
.Pp
|
|
.Fn futimens
|
|
is like
|
|
.Fn futimes
|
|
except that time is specified with nanosecond instead of microseconds.
|
|
.Pp
|
|
.Fn utimensat
|
|
also allows time to be specifed with nanoseconds.
|
|
When it operates on a symbolic link, it will change the target's time if
|
|
.Ar follow
|
|
is unset.
|
|
If
|
|
.Ar follow
|
|
is set to
|
|
.Dv AT_SYMLINK_NOFOLLOW ,
|
|
the symbolic link's dates are changed.
|
|
.Pp
|
|
The nanosecond fields for
|
|
.Fn futimens
|
|
and
|
|
.Fn utimensat
|
|
can be set to the special value
|
|
.Dv UTIME_NOW
|
|
to set the current time, or to
|
|
.Dv UTIME_OMIT
|
|
to let the time unchanged (this allows changing access time but not
|
|
modification time, and vice-versa).
|
|
.Pp
|
|
.Fn utimensat
|
|
is partially implemented.
|
|
It will return
|
|
.Er ENOSYS
|
|
for
|
|
.Fa fd
|
|
values different than
|
|
.Dv AT_FDCWD .
|
|
.Sh RETURN VALUES
|
|
Upon successful completion, a value of 0 is returned.
|
|
Otherwise, a value of \-1 is returned and
|
|
.Va errno
|
|
is set to indicate the error.
|
|
.Sh ERRORS
|
|
.Fn utimes ,
|
|
.Fn lutimes ,
|
|
and
|
|
.Fn utimensat
|
|
will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EACCES
|
|
Search permission is denied for a component of the path prefix;
|
|
or the
|
|
.Fa times
|
|
argument is
|
|
.Dv NULL
|
|
and the effective user ID of the process does not
|
|
match the owner of the file, and is not the super-user, and write
|
|
access is denied.
|
|
.It Bq Er EFAULT
|
|
.Fa path
|
|
or
|
|
.Fa times
|
|
points outside the process's allocated address space.
|
|
.It Bq Er EIO
|
|
An I/O error occurred while reading or writing the affected inode.
|
|
.It Bq Er ELOOP
|
|
Too many symbolic links were encountered in translating the pathname.
|
|
.It Bq Er ENAMETOOLONG
|
|
A component of a pathname exceeded
|
|
.Brq Dv NAME_MAX
|
|
characters, or an entire path name exceeded
|
|
.Brq Dv PATH_MAX
|
|
characters.
|
|
.It Bq Er ENOENT
|
|
The named file does not exist.
|
|
.It Bq Er ENOTDIR
|
|
A component of the path prefix is not a directory.
|
|
.It Bq Er EPERM
|
|
The
|
|
.Fa times
|
|
argument is not
|
|
.Dv NULL
|
|
and the calling process's effective user ID
|
|
does not match the owner of the file and is not the super-user.
|
|
.It Bq Er EROFS
|
|
The file system containing the file is mounted read-only.
|
|
.El
|
|
.Pp
|
|
.Fn futimes
|
|
and
|
|
.Fn futimens
|
|
will fail if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EACCES
|
|
The
|
|
.Fa times
|
|
argument is
|
|
.Dv NULL
|
|
and the effective user ID of the process does not
|
|
match the owner of the file, and is not the super-user, and write
|
|
access is denied.
|
|
.It Bq Er EBADF
|
|
.Fa fd
|
|
does not refer to a valid descriptor.
|
|
.It Bq Er EFAULT
|
|
.Fa times
|
|
points outside the process's allocated address space.
|
|
.It Bq Er EIO
|
|
An I/O error occurred while reading or writing the affected inode.
|
|
.It Bq Er EPERM
|
|
The
|
|
.Fa times
|
|
argument is not
|
|
.Dv NULL
|
|
and the calling process's effective user ID
|
|
does not match the owner of the file and is not the super-user.
|
|
.It Bq Er EROFS
|
|
The file system containing the file is mounted read-only.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr stat 2 ,
|
|
.Xr utime 3 ,
|
|
.Xr symlink 7
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn utimes
|
|
function conforms to
|
|
.St -p1003.1-2001 .
|
|
It was however marked as legacy in the
|
|
.St -p1003.1-2004
|
|
revision.
|
|
.Fn futimens
|
|
and
|
|
.Fn utimensat
|
|
functions conform to
|
|
.St -p1003.1-2008 .
|
|
.Sh HISTORY
|
|
The
|
|
.Fn utimes
|
|
function call appeared in
|
|
.Bx 4.2 .
|
|
The
|
|
.Fn futimes
|
|
function call appeared in
|
|
.Nx 1.2 .
|
|
The
|
|
.Fn lutimes
|
|
function call appeared in
|
|
.Nx 1.3 .
|
|
Birthtime setting support was added in
|
|
.Nx 5.0 .
|
|
.Fn futimens
|
|
and
|
|
.Fn utimensat
|
|
functions calls appreared in
|
|
.Nx 6.0 .
|
|
.Sh BUGS
|
|
.Fn utimensat
|
|
is partially implemented.
|