fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
263 lines
6.7 KiB
Groff
263 lines
6.7 KiB
Groff
.\" $NetBSD: utimes.2,v 1.13 1999/03/22 19:45:11 garbled Exp $
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.\"
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.\" Copyright (c) 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)utimes.2 8.1 (Berkeley) 6/4/93
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.\" $FreeBSD$
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.\"
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.Dd June 9, 2016
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.Dt UTIMES 2
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.Os
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.Sh NAME
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.Nm utimes ,
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.Nm lutimes ,
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.Nm futimes ,
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.Nm futimesat
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.Nd set file access and modification times
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/time.h
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.Ft int
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.Fn utimes "const char *path" "const struct timeval *times"
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.Ft int
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.Fn lutimes "const char *path" "const struct timeval *times"
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.Ft int
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.Fn futimes "int fd" "const struct timeval *times"
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.Ft int
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.Fn futimesat "int fd" "const char *path" "const struct timeval times[2]"
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.Sh DESCRIPTION
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.Bf -symbolic
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These interfaces are obsoleted by
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.Xr futimens 2
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and
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.Xr utimensat 2
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because they are not accurate to nanoseconds.
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.Ef
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.Pp
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The access and modification times of the file named by
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.Fa path
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or referenced by
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.Fa fd
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are changed as specified by the argument
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.Fa times .
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.Pp
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If
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.Fa times
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is
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.Dv NULL ,
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the access and modification times are set to the current time.
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The caller must be the owner of the file, have permission to
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write the file, or be the super-user.
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.Pp
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If
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.Fa times
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is
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.No non- Ns Dv NULL ,
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it is assumed to point to an array of two timeval structures.
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The access time is set to the value of the first element, and the
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modification time is set to the value of the second element.
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For file systems that support file birth (creation) times (such as
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.Dv UFS2 ) ,
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the birth time will be set to the value of the second element
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if the second element is older than the currently set birth time.
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To set both a birth time and a modification time,
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two calls are required; the first to set the birth time
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and the second to set the (presumably newer) modification time.
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Ideally a new system call will be added that allows the setting
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of all three times at once.
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The caller must be the owner of the file or be the super-user.
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.Pp
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In either case, the inode-change-time of the file is set to the current
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time.
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.Pp
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The
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.Fn lutimes
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system call
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is like
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.Fn utimes
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except in the case where the named file is a symbolic link,
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in which case
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.Fn lutimes
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changes the access and modification times of the link,
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while
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.Fn utimes
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changes the times of the file the link references.
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.Pp
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The
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.Fn futimesat
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system call is equivalent to
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.Fn utimes
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except in the case where
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.Fa path
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specifies a relative path.
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In this case the access and modification time
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is set to that of a file relative to the directory associated with the file
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descriptor
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.Fa fd
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instead of the current working directory.
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If
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.Fn futimesat
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is passed the special value
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.Dv AT_FDCWD
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in the
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.Fa fd
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parameter, the current working directory is used and the behavior
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is identical to a call to
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.Fn utimes .
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.Sh RETURN VALUES
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.Rv -std
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.Sh ERRORS
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All of the system call will fail if:
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.Bl -tag -width Er
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.It Bq Er EACCES
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Search permission is denied for a component of the path prefix.
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.It Bq Er EACCES
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The
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.Fa times
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argument is
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.Dv NULL
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and the effective user ID of the process does not
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match the owner of the file, and is not the super-user, and write
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access is denied.
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.It Bq Er EFAULT
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The
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.Fa path
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or
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.Fa times
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argument
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points outside the process's allocated address space.
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.It Bq Er EFAULT
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The
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.Fa times
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argument
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points outside the process's allocated address space.
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.It Bq Er EINVAL
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The
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.Va tv_usec
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component of at least one of the values specified by the
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.Fa times
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argument has a value less than 0 or greater than 999999.
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.It Bq Er EIO
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An I/O error occurred while reading or writing the affected inode.
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.It Bq Er ELOOP
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Too many symbolic links were encountered in translating the pathname.
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.It Bq Er ENAMETOOLONG
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A component of a pathname exceeded
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.Dv NAME_MAX
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characters, or an entire path name exceeded
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.Dv PATH_MAX
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characters.
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.It Bq Er ENOENT
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The named file does not exist.
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.It Bq Er ENOTDIR
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A component of the path prefix is not a directory.
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.It Bq Er EPERM
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The
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.Fa times
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argument is not
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.Dv NULL
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and the calling process's effective user ID
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does not match the owner of the file and is not the super-user.
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.It Bq Er EPERM
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The named file has its immutable or append-only flags set.
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See the
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.Xr chflags 2
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manual page for more information.
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.It Bq Er EROFS
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The file system containing the file is mounted read-only.
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.El
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.Pp
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The
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.Fn futimes
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system call
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will fail if:
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.Bl -tag -width Er
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.It Bq Er EBADF
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The
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.Fa fd
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argument
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does not refer to a valid descriptor.
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.El
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.Pp
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In addition to the errors returned by the
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.Fn utimes ,
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the
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.Fn futimesat
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may fail if:
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.Bl -tag -width Er
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.It Bq Er EBADF
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The
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.Fa path
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argument does not specify an absolute path and the
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.Fa fd
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argument is neither
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.Dv AT_FDCWD
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nor a valid file descriptor open for searching.
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.It Bq Er ENOTDIR
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The
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.Fa path
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argument is not an absolute path and
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.Fa fd
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is neither
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.Dv AT_FDCWD
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nor a file descriptor associated with a directory.
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.El
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.Sh SEE ALSO
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.Xr chflags 2 ,
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.Xr stat 2 ,
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.Xr utimensat 2 ,
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.Xr utime 3
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.Sh STANDARDS
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The
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.Fn utimes
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function is expected to conform to
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.St -xpg4.2 .
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The
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.Fn futimesat
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system call follows The Open Group Extended API Set 2 specification
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but was replaced by
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.Fn utimensat
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in
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.St -p1003.1-2008 .
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.Sh HISTORY
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The
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.Fn utimes
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system call appeared in
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.Bx 4.2 .
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The
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.Fn futimes
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and
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.Fn lutimes
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system calls first appeared in
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.Fx 3.0 .
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The
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.Fn futimesat
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system call appeared in
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.Fx 8.0 .
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