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Name

chgrp - change file group ownership

Synopsis

chgrp [ -fhR ] group file ...

Availability

SUNWcsu

Description

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:

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 ID s, whether or not this option is in effect.

Options

-f
Force. Do not report errors.
-h
If the file is a symbolic link, change the group of the symbolic link. Without this option, the group of the file referenced by the symbolic link is changed.
-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 target file is changed (unless the -h option is specified), but no recursion takes place.

Operands

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.

Environment

See environ(5) for descriptions of the following environment variables that affect the execution of chgrp: LC_CTYPE , LC_MESSAGES , and NLSPATH .

Exit Status

The following exit values are returned:
  1. The utility executed successfully and all requested changes were made.
    >0
    An error occurred.

    Files

    /etc/group
    group file

    See Also

    chmod(1) , chown(1) , id(1M) , chown(2) , group(4) , passwd(4) , environ(5)

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