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.\" @(#)chgrp.1 8.3 (Berkeley) 3/31/94 32.\" 33.Dd January 7, 2017 34.Dt CHGRP 1 35.Os 36.Sh NAME 37.Nm chgrp 38.Nd change group 39.Sh SYNOPSIS 40.Nm 41.Op Fl fhvx 42.Oo 43.Fl R 44.Op Fl H | Fl L | Fl P 45.Oc 46.Ar group 47.Ar 48.Sh DESCRIPTION 49The 50.Nm 51utility sets the group ID of the file named by each 52.Ar file 53operand to the 54.Ar group 55ID specified by the group operand. 56.Pp 57The following options are available: 58.Bl -tag -width indent 59.It Fl H 60If the 61.Fl R 62option is specified, symbolic links on the command line are followed 63and hence unaffected by the command. 64(Symbolic links encountered during traversal are not followed.) 65.It Fl L 66If the 67.Fl R 68option is specified, all symbolic links are followed. 69.It Fl P 70If the 71.Fl R 72option is specified, no symbolic links are followed. 73This is the default. 74.It Fl R 75Change the group ID of the file hierarchies rooted in the files, 76instead of just the files themselves. 77Beware of unintentionally matching the 78.Dq Pa ".." 79hard link to the parent directory when using wildcards like 80.Dq Li ".*" . 81.It Fl f 82The force option ignores errors, except for usage errors and does not 83query about strange modes (unless the user does not have proper permissions). 84.It Fl h 85If the file is a symbolic link, the group ID of the link itself is changed 86rather than the file that is pointed to. 87.It Fl v 88Cause 89.Nm 90to be verbose, showing files as the group is modified. 91If the 92.Fl v 93flag is specified more than once, 94.Nm 95will print the filename, followed by the old and new numeric group ID. 96.It Fl x 97File system mount points are not traversed. 98.El 99.Pp 100The 101.Fl H , 102.Fl L 103and 104.Fl P 105options are ignored unless the 106.Fl R 107option is specified. 108In addition, these options override each other and the 109command's actions are determined by the last one specified. 110.Pp 111The 112.Ar group 113operand can be either a group name from the group database, 114or a numeric group ID. 115If a group name is also a numeric group ID, the operand is used as a 116group name. 117.Pp 118The user invoking 119.Nm 120must belong to the specified group and be the owner of the file, 121or be the super-user. 122.Pp 123If 124.Nm 125receives a 126.Dv SIGINFO 127signal (see the 128.Cm status 129argument for 130.Xr stty 1 ) , 131then the current filename as well as the old and new group names are 132displayed. 133.Sh FILES 134.Bl -tag -width /etc/group -compact 135.It Pa /etc/group 136group ID file 137.El 138.Sh EXIT STATUS 139.Ex -std 140.Sh COMPATIBILITY 141In previous versions of this system, symbolic links did not have groups. 142.Pp 143The 144.Fl v 145and 146.Fl x 147options are non-standard and their use in scripts is not recommended. 148.Sh SEE ALSO 149.Xr chown 2 , 150.Xr fts 3 , 151.Xr group 5 , 152.Xr passwd 5 , 153.Xr symlink 7 , 154.Xr chown 8 155.Sh STANDARDS 156The 157.Nm 158utility is expected to be 159.St -p1003.2 160compatible. 161