chgrp man page on 4.4BSD

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CHGRP(1)		  BSD General Commands Manual		      CHGRP(1)

     chgrp — change group

     chgrp [-R [-H | -L | -P]] [-f] group files ...

     The chgrp utility sets the group ID of the file named by each file oper‐
     and to the group ID specified by the group operand.


     -H	     If the -R option is specified, symbolic links on the command line
	     are followed.  (Symbolic links encountered in the tree traversal
	     are not followed.)

     -L	     If the -R option is specified, all symbolic links are followed.

     -P	     If the -R option is specified, no symbolic links are followed.

     -R	     Change the group ID for the file hierarchies rooted in the files
	     instead of just the files themselves.

     -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).

     Symbolic links don't have groups, so unless the -H or -L option is set,
     chgrp on a symbolic link always succeeds and has no effect.  The -H, -L
     and -P options are ignored unless the -R option is specified.  In addi‐
     tion, these options override each other and the command's actions are
     determined by the last one specified.

     The 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 op‐
     erand is used as a group name.

     The user invoking chgrp must belong to the specified group and be the
     owner of the file, or be the super-user.

     The chgrp utility exits 0 on success, and >0 if an error occurs.

     Previous versions of the chgrp utility changed the group of symbolic
     links specified on the command line.  In this system, symbolic links do
     not have groups.

     /etc/group	 Group ID file

     chown(2), group(5), passwd(5), fts(3), symlink(7), chown(8)

     The chgrp utility is expected to be POSIX 1003.2 compatible.

4.2 Berkeley Distribution	March 31, 1994	     4.2 Berkeley Distribution

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