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. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.Dd January 7, 2017 32.Dt CHGRP 1 33.Os 34.Sh NAME 35.Nm chgrp 36.Nd change group 37.Sh SYNOPSIS 38.Nm 39.Op Fl fhvx 40.Oo 41.Fl R 42.Op Fl H | Fl L | Fl P 43.Oc 44.Ar group 45.Ar 46.Sh DESCRIPTION 47The 48.Nm 49utility sets the group ID of the file named by each 50.Ar file 51operand to the 52.Ar group 53ID specified by the group operand. 54.Pp 55The following options are available: 56.Bl -tag -width indent 57.It Fl H 58If the 59.Fl R 60option is specified, symbolic links on the command line are followed 61and hence unaffected by the command. 62(Symbolic links encountered during traversal are not followed.) 63.It Fl L 64If the 65.Fl R 66option is specified, all symbolic links are followed. 67.It Fl P 68If the 69.Fl R 70option is specified, no symbolic links are followed. 71This is the default. 72.It Fl R 73Change the group ID of the file hierarchies rooted in the files, 74instead of just the files themselves. 75Beware of unintentionally matching the 76.Dq Pa ".." 77hard link to the parent directory when using wildcards like 78.Dq Li ".*" . 79.It Fl f 80The force option ignores errors, except for usage errors and does not 81query about strange modes (unless the user does not have proper permissions). 82.It Fl h 83If the file is a symbolic link, the group ID of the link itself is changed 84rather than the file that is pointed to. 85.It Fl v 86Cause 87.Nm 88to be verbose, showing files as the group is modified. 89If the 90.Fl v 91flag is specified more than once, 92.Nm 93will print the filename, followed by the old and new numeric group ID. 94.It Fl x 95File system mount points are not traversed. 96.El 97.Pp 98The 99.Fl H , 100.Fl L 101and 102.Fl P 103options are ignored unless the 104.Fl R 105option is specified. 106In addition, these options override each other and the 107command's actions are determined by the last one specified. 108.Pp 109The 110.Ar group 111operand can be either a group name from the group database, 112or a numeric group ID. 113If a group name is also a numeric group ID, the operand is used as a 114group name. 115.Pp 116The user invoking 117.Nm 118must belong to the specified group and be the owner of the file, 119or be the super-user. 120.Pp 121If 122.Nm 123receives a 124.Dv SIGINFO 125signal (see the 126.Cm status 127argument for 128.Xr stty 1 ) , 129then the current filename as well as the old and new group names are 130displayed. 131.Sh FILES 132.Bl -tag -width /etc/group -compact 133.It Pa /etc/group 134group ID file 135.El 136.Sh EXIT STATUS 137.Ex -std 138.Sh COMPATIBILITY 139In previous versions of this system, symbolic links did not have groups. 140.Pp 141The 142.Fl v 143and 144.Fl x 145options are non-standard and their use in scripts is not recommended. 146.Sh SEE ALSO 147.Xr chown 2 , 148.Xr fts 3 , 149.Xr group 5 , 150.Xr passwd 5 , 151.Xr symlink 7 , 152.Xr chown 8 153.Sh STANDARDS 154The 155.Nm 156utility is expected to be 157.St -p1003.2 158compatible. 159