NetBSD/usr.sbin/chown/chgrp.1

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.\"     from: @(#)chgrp.1	8.3 (Berkeley) 3/31/94
.\"	$NetBSD: chgrp.1,v 1.6 1997/10/06 13:33:54 enami Exp $
.\"
.Dd March 31, 1994
.Dt CHGRP 1
.Os BSD 4.2
.Sh NAME
.Nm chgrp
.Nd change group
.Sh SYNOPSIS
.Nm chgrp
.Oo
.Fl R
.Op Fl H | Fl L | Fl P
.Oc
.Op Fl fh
.Ar group
.Ar files ...
.Sh DESCRIPTION
The chgrp utility sets the group ID of the file named by each
.Ar file
operand to the
.Ar group
ID specified by the group operand.
.Pp
Options:
.Bl -tag -width Ds
.It Fl H
If the
.Fl R
option is specified, symbolic links on the command line are followed.
(Symbolic links encountered in the tree traversal are not followed.)
.It Fl L
If the
.Fl R
option is specified, all symbolic links are followed.
.It Fl P
If the
.Fl R
option is specified, no symbolic links are followed.
.It Fl R
Change the group ID for the file hierarchies rooted
in the files instead of just the files themselves.
.It Fl f
The force option ignores errors, except for usage errors and doesn't
query about strange modes (unless the user does not have proper permissions).
.It Fl h
If
.Ar file
is symbolic link, the group of the link is changed.
.El
.Pp
If
.Fl h
is not given, unless the 
.Fl H
or
.Fl L
option is set,
.Nm chgrp
on a symbolic link always succeeds and has no effect.
The
.Fl H ,
.Fl L
and
.Fl P
options are ignored unless the
.Fl R
option is specified.
In addition, these options override each other and the
command's actions are determined by the last one specified.
.Pp
The
.Ar group
operand can be either a group name from the group database,
or a numeric group ID.
If a group name is also a numeric group ID, the operand is used as a
group name.
.Pp
The user invoking
.Nm chgrp
must belong to the specified group and be the owner of the file,
or be the super-user.
.Pp
The
.Nm chgrp
utility exits 0 on success, and >0 if an error occurs.
.Sh COMPATIBILITY
Previous versions of the
.Nm chgrp
utility changed the group of symbolic links specified on the command
line.
In this system, symbolic links do not have groups.
.Sh FILES
.Bl -tag -width /etc/group -compact
.It Pa /etc/group
Group ID file
.El
.Sh SEE ALSO
.Xr chown 2 ,
.Xr group 5 ,
.Xr passwd 5 ,
.Xr fts 3 ,
.Xr symlink 7 ,
.Xr chown 8
.Sh STANDARDS
The
.Nm chgrp
utility is expected to be POSIX 1003.2 compatible.