[apple/file_cmds.git] / chown / chgrp.1

.\" Copyright (c) 1983, 1990, 1993, 1994
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the Institute of Electrical and Electronics Engineers, Inc.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"     @(#)chgrp.1	8.3 (Berkeley) 3/31/94
.\" $FreeBSD: src/usr.sbin/chown/chgrp.1,v 1.13 2001/08/15 09:09:46 ru Exp $
.\"
.Dd March 31, 1994
.Dt CHGRP 1
.Os
.Sh NAME
.Nm chgrp
.Nd change group
.Sh SYNOPSIS
.Nm chgrp
.Op Fl fhnv
.Oo
.Fl R
.Op Fl H | Fl L | Fl P
.Oc
.Ar group
.Ar
.Sh DESCRIPTION
The
.Nm 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
The following options are available:
.Bl -tag -width indent
.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 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 h
If the file is a symbolic link, the group ID of the link itself is changed
rather than the file that is pointed to.
.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.
This is the default. Use
.Fl h
to change the group ID of a symbolic link.
.It Fl R
Change the group ID for the file hierarchies rooted
in the files instead of just the files themselves.
.It Fl n
Interpret the group ID as numeric, avoiding the name lookup.
.It Fl v
Cause
.Nm chgrp
to be verbose, showing files as the group is modified.
.El
.Pp
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.
.Sh DIAGNOSTICS
.Ex -std
.Sh COMPATIBILITY
In previous versions of this system, symbolic links did not have groups.
.Pp
The
.Fl v
option is non-standard and its use in scripts is not recommended.
.Sh FILES
.Bl -tag -width /etc/group -compact
.It Pa /etc/group
group ID file
.El
.Sh SEE ALSO
.Xr chown 2 ,
.Xr fts 3 ,
.Xr group 5 ,
.Xr passwd 5 ,
.Xr symlink 7 ,
.Xr chown 8
.Sh STANDARDS
The
.Nm chgrp
utility is expected to be
.St -p1003.2
compatible.
Commit	Line	Data
44a7a5ab A	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	.\"
6c780a1f A	35	.\" @(#)chgrp.1 8.3 (Berkeley) 3/31/94
6c780a1f A	36	.\" $FreeBSD: src/usr.sbin/chown/chgrp.1,v 1.13 2001/08/15 09:09:46 ru Exp $
44a7a5ab A	37	.\"
	38	.Dd March 31, 1994
	39	.Dt CHGRP 1
6c780a1f	40	.Os
44a7a5ab A	41	.Sh NAME
	42	.Nm chgrp
	43	.Nd change group
	44	.Sh SYNOPSIS
864a4b6e	45	.Nm chgrp
48fce603	46	.Op Fl fhnv
44a7a5ab A	47	.Oo
	48	.Fl R
	49	.Op Fl H \| Fl L \| Fl P
	50	.Oc
44a7a5ab	51	.Ar group
6c780a1f	52	.Ar
44a7a5ab A	53	.Sh DESCRIPTION
44a7a5ab A	54	The
864a4b6e	55	.Nm chgrp
44a7a5ab A	56	utility sets the group ID of the file named by each
	57	.Ar file
	58	operand to the
	59	.Ar group
	60	ID specified by the group operand.
	61	.Pp
6c780a1f A	62	The following options are available:
6c780a1f A	63	.Bl -tag -width indent
864a4b6e A	64	.It Fl f
	65	The force option ignores errors, except for usage errors and doesn't
	66	query about strange modes (unless the user does not have proper permissions).
44a7a5ab A	67	.It Fl H
	68	If the
	69	.Fl R
	70	option is specified, symbolic links on the command line are followed.
6c780a1f	71	(Symbolic links encountered in the tree traversal are not followed).
864a4b6e A	72	.It Fl h
	73	If the file is a symbolic link, the group ID of the link itself is changed
	74	rather than the file that is pointed to.
44a7a5ab A	75	.It Fl L
	76	If the
	77	.Fl R
	78	option is specified, all symbolic links are followed.
	79	.It Fl P
	80	If the
	81	.Fl R
	82	option is specified, no symbolic links are followed.
40bf83fe A	83	This is the default. Use
	84	.Fl h
	85	to change the group ID of a symbolic link.
44a7a5ab A	86	.It Fl R
	87	Change the group ID for the file hierarchies rooted
	88	in the files instead of just the files themselves.
48fce603 A	89	.It Fl n
48fce603 A	90	Interpret the group ID as numeric, avoiding the name lookup.
6c780a1f A	91	.It Fl v
6c780a1f A	92	Cause
864a4b6e	93	.Nm chgrp
6c780a1f	94	to be verbose, showing files as the group is modified.
44a7a5ab A	95	.El
44a7a5ab A	96	.Pp
44a7a5ab A	97	The
	98	.Fl H ,
	99	.Fl L
	100	and
	101	.Fl P
	102	options are ignored unless the
	103	.Fl R
	104	option is specified.
	105	In addition, these options override each other and the
	106	command's actions are determined by the last one specified.
	107	.Pp
	108	The
	109	.Ar group
	110	operand can be either a group name from the group database,
	111	or a numeric group ID.
	112	If a group name is also a numeric group ID, the operand is used as a
	113	group name.
	114	.Pp
	115	The user invoking
864a4b6e	116	.Nm chgrp
44a7a5ab A	117	must belong to the specified group and be the owner of the file,
44a7a5ab A	118	or be the super-user.
6c780a1f A	119	.Sh DIAGNOSTICS
	120	.Ex -std
	121	.Sh COMPATIBILITY
	122	In previous versions of this system, symbolic links did not have groups.
44a7a5ab A	123	.Pp
44a7a5ab A	124	The
6c780a1f A	125	.Fl v
6c780a1f A	126	option is non-standard and its use in scripts is not recommended.
44a7a5ab A	127	.Sh FILES
	128	.Bl -tag -width /etc/group -compact
	129	.It Pa /etc/group
6c780a1f	130	group ID file
44a7a5ab A	131	.El
	132	.Sh SEE ALSO
	133	.Xr chown 2 ,
44a7a5ab A	134	.Xr fts 3 ,
	135	.Xr group 5 ,
	136	.Xr passwd 5 ,
	137	.Xr symlink 7 ,
	138	.Xr chown 8
	139	.Sh STANDARDS
	140	The
864a4b6e	141	.Nm chgrp
6c780a1f A	142	utility is expected to be
	143	.St -p1003.2
	144	compatible.