2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
201 lines
5.8 KiB
Groff
201 lines
5.8 KiB
Groff
.\" $NetBSD: utimes.2,v 1.26 2010/04/29 17:02:38 jruoho 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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.\"
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.Dd April 29, 2010
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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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.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[2]"
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.Ft int
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.Fn lutimes "const char *path" "const struct timeval times[2]"
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.Ft int
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.Fn futimes "int fd" "const struct timeval times[2]"
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.Sh DESCRIPTION
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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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.Pf non- 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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UFS2), 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, two calls are
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required; the first to set the birth time and the second to set
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the (presumably newer) modification time.
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Ideally a new system call will be added that allows the setting of
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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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.Fn lutimes
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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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.Sh RETURN VALUES
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Upon successful completion, a value of 0 is returned.
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Otherwise, a value of \-1 is returned and
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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.Fn utimes
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and
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.Fn lutimes
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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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or 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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.Fa path
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or
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.Fa times
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points outside the process's allocated address space.
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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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.Brq Dv NAME_MAX
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characters, or an entire path name exceeded
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.Brq 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 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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.Fn futimes
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will fail if:
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.Bl -tag -width Er
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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 EBADF
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.Fa fd
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does not refer to a valid descriptor.
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.It Bq Er EFAULT
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.Fa times
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points outside the process's allocated address space.
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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 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 EROFS
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The file system containing the file is mounted read-only.
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.El
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.Sh SEE ALSO
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.Xr stat 2 ,
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.Xr utime 3 ,
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.Xr symlink 7
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.Sh STANDARDS
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The
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.Fn utimes
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function conforms to
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.St -p1003.1-2001 .
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It was however marked as legacy in the
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.St -p1003.1-2004
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revision.
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.Sh HISTORY
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The
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.Fn utimes
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function 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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function call appeared in
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.Nx 1.2 .
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The
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.Fn lutimes
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function call appeared in
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.Nx 1.3 .
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Birthtime setting support was added in
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.Nx 5.0 .
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