141 lines
3.8 KiB
Groff
141 lines
3.8 KiB
Groff
.\" $OpenBSD: chgrp.1,v 1.17 2015/12/31 23:38:16 guenther Exp $
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.\"
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.\" Copyright (c) 1983, 1990, 1993, 1994
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the Institute of Electrical and Electronics Engineers, Inc.
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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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.\" from: @(#)chgrp.1 8.3 (Berkeley) 3/31/94
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.\"
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.Dd $Mdocdate: December 31 2015 $
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.Dt CHGRP 1
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.Os
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.Sh NAME
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.Nm chgrp
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.Nd change group
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.Sh SYNOPSIS
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.Nm chgrp
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.Op Fl h
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.Oo
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.Fl R
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.Op Fl H | L | P
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.Oc
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.Ar group
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.Ar
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.Sh DESCRIPTION
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.Nm
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sets the group ID of the specified files.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl H
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If the
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.Fl R
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option is specified, symbolic links on the command line are followed.
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Symbolic links encountered in the tree traversal are not followed.
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.It Fl h
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Treat symbolic links like other files: modify links instead of
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following them.
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The
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.Fl h
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and
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.Fl R
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options are mutually exclusive.
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.It Fl L
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If the
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.Fl R
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option is specified, all symbolic links are followed.
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.It Fl P
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If the
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.Fl R
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option is specified, no symbolic links are followed.
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.It Fl R
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Recurse.
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Where
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.Ar file
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is a directory,
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change the group ID of the directory and all the files and directories
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in the file hierarchy below it.
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.El
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.Pp
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The
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.Fl H ,
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.Fl L ,
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and
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.Fl P
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options are ignored unless the
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.Fl R
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option is specified;
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if none of them are given,
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the default is to not follow symbolic links.
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In addition, these options override each other and the
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command's actions are determined by the last one specified.
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.Pp
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The
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.Ar group
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operand can be either a group name from the group database,
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or a numeric group ID.
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If a group name is also a numeric group ID, the operand is used as a
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group name.
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.Pp
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By default,
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.Nm
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clears the set-user-ID and set-group-ID bits on the file
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to prevent accidental or mischievous creation of
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set-user-ID and set-group-ID programs.
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This behaviour can be overridden by setting the
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.Xr sysctl 8
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variable
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.Va fs.posix.setuid
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to zero.
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.Pp
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The user invoking
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.Nm
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must belong to the specified group and be the owner of the file,
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or be the superuser.
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.Sh FILES
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.Bl -tag -width /etc/group -compact
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.It Pa /etc/group
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group ID file
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.El
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.Sh EXIT STATUS
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.Ex -std chgrp
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.Sh SEE ALSO
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.Xr chown 2 ,
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.Xr fts 3 ,
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.Xr group 5 ,
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.Xr passwd 5 ,
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.Xr symlink 7 ,
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.Xr chown 8
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.Sh STANDARDS
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The
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.Nm
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utility is compliant with the
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.St -p1003.1-2008
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specification.
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