chown/chgrp.1

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  35 .\"     from: @(#)chgrp.1       8.3 (Berkeley) 3/31/94
  36 .\"     $NetBSD: chgrp.1,v 1.10 1997/12/21 18:11:19 kleink Exp $
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  38 .Dd March 31, 1994
  39 .Dt CHGRP 1
  40 .Os BSD 4.2
  41 .Sh NAME
  42 .Nm chgrp
  43 .Nd change group
  44 .Sh SYNOPSIS
  45 .Nm
  46 .Oo
  47 .Fl R
  48 .Op Fl H | Fl L | Fl P
  49 .Oc
  50 .Op Fl fh
  51 .Ar group
  52 .Ar files ...
  53 .Sh DESCRIPTION
  54 The
  55 .Nm
  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
  62 Options:
  63 .Bl -tag -width Ds
  64 .It Fl H
  65 If the
  66 .Fl R
  67 option is specified, symbolic links on the command line are followed.
  68 (Symbolic links encountered in the tree traversal are not followed.)
  69 .It Fl L
  70 If the
  71 .Fl R
  72 option is specified, all symbolic links are followed.
  73 .It Fl P
  74 If the
  75 .Fl R
  76 option is specified, no symbolic links are followed.
  77 .It Fl R
  78 Change the group ID for the file hierarchies rooted
  79 in the files instead of just the files themselves.
  80 .It Fl f
  81 The force option ignores errors, except for usage errors and doesn't
  82 query about strange modes (unless the user does not have proper permissions).
  83 .It Fl h
  84 If
  85 .Ar file
  86 is a symbolic link, the group of the link is changed.
  87 .El
  88 .Pp
  89 If
  90 .Fl h
  91 is not given, unless the
  92 .Fl H
  93 or
  94 .Fl L
  95 option is set,
  96 .Nm
  97 on a symbolic link always succeeds and has no effect.
  98 The
  99 .Fl H ,
 100 .Fl L
 101 and
 102 .Fl P
 103 options are ignored unless the
 104 .Fl R
 105 option is specified.
 106 In addition, these options override each other and the
 107 command's actions are determined by the last one specified.
 108 .Pp
 109 The
 110 .Ar group
 111 operand can be either a group name from the group database,
 112 or a numeric group ID.
 113 If a group name is also a numeric group ID, the operand is used as a
 114 group name.
 115 .Pp
 116 The user invoking
 117 .Nm
 118 must belong to the specified group and be the owner of the file,
 119 or be the super-user.
 120 .Pp
 121 Unless invoked by the super-user,
 122 .Nm
 123 clears the set-user-id and set-group-id bits on a file to prevent
 124 accidental or mischievous creation of set-user-id or set-group-id
 125 programs.
 126 .Pp
 127 The
 128 .Nm
 129 utility exits 0 on success, and >0 if an error occurs.
 130 .Sh FILES
 131 .Bl -tag -width /etc/group -compact
 132 .It Pa /etc/group
 133 Group ID file
 134 .El
 135 .Sh SEE ALSO
 136 .Xr chown 2 ,
 137 .Xr lchown 2 ,
 138 .Xr fts 3 ,
 139 .Xr group 5 ,
 140 .Xr passwd 5 ,
 141 .Xr symlink 7 ,
 142 .Xr chown 8
 143 .Sh STANDARDS
 144 The
 145 .Nm
 146 utility is expected to be POSIX 1003.2 compatible.