chgrp - change file group ownership
chgrp [-fhR] group file...
chgrp -s [-fhR] groupsid file...
chgrp -R [f] [-H | -L | -P] group file...
chgrp -s -R [f] [-H | -L | -P] groupsid file...
The chgrp utility will set the group ID of the file named by each
file operand to the group ID specified by the group operand.
For each file operand, it will perform actions equivalent
to the chown(2) function, called with the following arguments:
- o
- The file operand will be used as the path argument.
- o
- The user ID of the file will be used as the owner argument.
- o
- The specified group ID will be used as the group argument.
Unless chgrp is invoked by a process with appropriate
privileges, the set-user-ID and set-group-ID bits of a regular file will be
cleared upon successful completion; the set-user-ID and set-group-ID bits of
other file types may be cleared.
The operating system has a configuration option
_POSIX_CHOWN_RESTRICTED, to restrict ownership changes. When this
option is in effect, the owner of the file may change the group of the file
only to a group to which the owner belongs. Only the super-user can
arbitrarily change owner IDs, whether or not this option is in effect. To
set this configuration option, include the following line in
/etc/system:
set rstchown = 1
To disable this option, include the following line in
/etc/system:
set rstchown = 0
_POSIX_CHOWN_RESTRICTED is enabled by default. See
system(5) and fpathconf(2).
The following options are supported.
-f
Force. Does not report errors.
-h
If the file is a symbolic link, this option changes the
group of the symbolic link. Without this option, the group of the file
referenced by the symbolic link is changed.
-H
If the file specified on the command line is a symbolic
link referencing a file of type directory, this option changes the group of
the directory referenced by the symbolic link and all the files in the file
hierarchy below it. If a symbolic link is encountered when traversing a file
hierarchy, the group of the target file is changed, but no recursion takes
place.
-L
If the file is a symbolic link, this option changes the
group of the file referenced by the symbolic link. If the file specified on
the command line, or encountered during the traversal of the file hierarchy,
is a symbolic link referencing a file of type directory, then this option
changes the group of the directory referenced by the symbolic link and all
files in the file hierarchy below it.
-P
If the file specified on the command line or encountered
during the traversal of a file hierarchy is a symbolic link, this option
changes the group of the symbolic link. This option does not follow the
symbolic link to any other part of the file hierarchy.
-R
Recursive. chgrp descends through the directory,
and any subdirectories, setting the specified group ID as it proceeds.
When a symbolic link is encountered, the group of the of the symbolic link is
changed, unless the -H or -L option is specified. Unless the
-H, -L, or -P option is specified, the -P option
is used as the default mode.
-s
The specified group is Windows SID. This option requires
a file system that supports storing SIDs, such as ZFS.
Specifying more than one of the mutually-exclusive options
-H, -L, or -P is not considered an error. The last
option specified determines the behavior of chgrp.
The following operands are supported:
group
A group name from the group database or a numeric group
ID. Either specifies a group ID to be given to each file named by one of the
file operands. If a numeric group operand exists in the group
database as a group name, the group ID number associated with that group name
is used as the group ID.
file
A path name of a file whose group ID is to be
modified.
See largefile(7) for the description of the behavior of chgrp when
encountering files greater than or equal to 2 Gbyte (2^31 bytes).
See environ(7) for descriptions of the following environment variables
that affect the execution of chgrp: LANG, LC_ALL,
LC_CTYPE, LC_MESSAGES, and NLSPATH.
The following exit values are returned:
0
The utility executed successfully and all requested
changes were made.
>0
An error occurred.
See attributes(7) for descriptions of the following attributes:
| ATTRIBUTE
TYPE |
ATTRIBUTE VALUE |
| CSI |
Enabled. See NOTES. |
| Interface Stability |
Committed |
| Standard |
See standards(7). |
chmod(1), chown(1), chown(2), fpathconf(2),
group(5), passwd(5), system(5), attributes(7),
environ(7), largefile(7), standards(7), id(8)
chgrp is CSI-enabled except for the group name.
In the past the behavior of /usr/xpg4/bin/chgrp and
/usr/bin/chgrp utilities was different. Now they behave the same
way.