1.\" Copyright (c) 1983, 1990, 1993, 1994 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the Institute of Electrical and Electronics Engineers, Inc. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by the University of 18.\" California, Berkeley and its contributors. 19.\" 4. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.\" @(#)chgrp.1 8.3 (Berkeley) 3/31/94 36.\" 37.Dd March 31, 1994 38.Dt CHGRP 1 39.Os BSD 4.2 40.Sh NAME 41.Nm chgrp 42.Nd change group 43.Sh SYNOPSIS 44.Nm chgrp 45.Oo 46.Fl R 47.Op Fl H | Fl L | Fl P 48.Oc 49.Op Fl f 50.Op Fl h 51.Ar group 52.Ar files ... 53.Sh DESCRIPTION 54The chgrp utility sets the group ID of the file named by each 55.Ar file 56operand to the 57.Ar group 58ID specified by the group operand. 59.Pp 60Options: 61.Bl -tag -width Ds 62.It Fl H 63If the 64.Fl R 65option is specified, symbolic links on the command line are followed. 66(Symbolic links encountered in the tree traversal are not followed.) 67.It Fl L 68If the 69.Fl R 70option is specified, all symbolic links are followed. 71.It Fl P 72If the 73.Fl R 74option is specified, no symbolic links are followed. 75.It Fl R 76Change the group ID for the file hierarchies rooted 77in the files instead of just the files themselves. 78.It Fl f 79The force option ignores errors, except for usage errors and doesn't 80query about strange modes (unless the user does not have proper permissions). 81.It Fl h 82If the file is a symbolic link, the group ID of the link itself is changed 83rather than the file that is pointed to. 84.El 85.Pp 86The 87.Fl H , 88.Fl L 89and 90.Fl P 91options are ignored unless the 92.Fl R 93option is specified. 94In addition, these options override each other and the 95command's actions are determined by the last one specified. 96.Pp 97The 98.Ar group 99operand can be either a group name from the group database, 100or a numeric group ID. 101If a group name is also a numeric group ID, the operand is used as a 102group name. 103.Pp 104The user invoking 105.Nm chgrp 106must belong to the specified group and be the owner of the file, 107or be the super-user. 108.Pp 109The 110.Nm chgrp 111utility exits 0 on success, and >0 if an error occurs. 112.Sh COMPATIBILITY 113In previous versions of this system, symbolic links did not have groups. 114.Sh FILES 115.Bl -tag -width /etc/group -compact 116.It Pa /etc/group 117Group ID file 118.El 119.Sh SEE ALSO 120.Xr chown 2 , 121.Xr fts 3 , 122.Xr group 5 , 123.Xr passwd 5 , 124.Xr symlink 7 , 125.Xr chown 8 126.Sh STANDARDS 127The 128.Nm chgrp 129utility is expected to be POSIX 1003.2 compatible. 130