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28 .\" from: @(#)chown.8 8.3 (Berkeley) 3/31/94
29 .\" $NetBSD: chown.8,v 1.6 2012/10/23 17:30:59 wiz Exp $
36 .Nd change file owner and group
41 .Op Fl H | Fl L | Fl P
44 .Ar owner Ns Op Ar :group
49 .Op Fl H | Fl L | Fl P
57 .Op Fl H | Fl L | Fl P
60 .Fl Fl reference=rfile
64 sets the user ID and/or the group ID of the specified files.
66 The options are as follows:
71 option is specified, symbolic links on the command line are followed.
72 (Symbolic links encountered in the tree traversal are not followed.)
76 option is specified, all symbolic links are followed.
80 option is specified, no symbolic links are followed.
82 Change the user ID and/or the group ID for the file hierarchies rooted
83 in the files instead of just the files themselves.
85 Don't report any failure to change file owner or group, nor modify
86 the exit status to reflect such failures.
90 is a symbolic link, the owner and/or group of the link is changed.
94 to be verbose, showing files as they are processed.
102 options are ignored unless the
105 In addition, these options override each other and the
106 command's actions are determined by the last one specified.
110 option cannot be used together with the
118 operands are both optional, however, one must be specified; alternatively,
119 both the owner and group may be specified using a reference
126 operand is specified, it must be preceded by a colon (``:'') character.
130 may be either a user name or a numeric user ID.
133 may be either a group name or a numeric group ID.
134 Since it is valid to have a user or group name that is numeric (and
135 doesn't have the numeric ID that matches its name) the name lookup
136 is always done first.
137 Preceding an ID with a ``#'' character will force it to be taken
140 The ownership of a file may only be altered by a super-user for
141 obvious security reasons.
143 Unless invoked by the super-user,
145 clears the set-user-id and set-group-id bits on a file to prevent
146 accidental or mischievous creation of set-user-id and set-group-id
151 utility exits 0 on success, and \*[Gt]0 if an error occurs.
153 Previous versions of the
155 utility used the dot (``.'') character to distinguish the group name.
156 This has been changed to be a colon (``:'') character so that user and
157 group names may contain the dot character.
169 command is expected to be POSIX 1003.2 compliant.
173 option and the use of ``#'' to force a numeric lookup