MirOS Manual: chown(8)

CHOWN(8)                 BSD System Manager's Manual                  CHOWN(8)


     chown - change file owner and group


     chown [-R [-H | -L | -P]] [-f] [-h] owner[:group] file [...]
     chown [-R [-H | -L | -P]] [-fh] :group file [...]


     chown sets the user ID and/or the group ID of the specified files.

     The options are as follows:

     -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 user ID and/or the group ID for the file hierarchies
             rooted in the files instead of just the files themselves.

     -f      Don't report any failure to change file owner or group, nor modi-
             fy the exit status to reflect such failures.

     -h      Change the user ID and/or the group ID on symbolic links. The -R
             and -h options are mutually exclusive.

     The -H, -L, and -P options are ignored unless the -R option is specified.
     In addition, these options override each other and the command's actions
     are determined by the last one specified.

     The owner and group operands are both optional; however, one must be
     specified. If the group operand is specified, it must be preceded by a
     colon (':') character.

     The owner may be either a numeric user ID or a user name. If a user name
     is also a numeric user ID, the operand is used as a user name. The group
     may be either a numeric group ID or a group name. If a group name is also
     a numeric group ID, the operand is used as a group name.

     By default, chown clears the set-user-ID and set-group-ID bits on the
     file to prevent accidental or mischievous creation of set-user-ID and
     set-group-ID programs. This behaviour can be overridden by setting the
     sysctl(8) variable fs.posix.suid to zero.

     Only the superuser is permitted to change the owner of a file.

     The chown utility exits 0 on success or >0 if an error occurred.


     chgrp(1), find(1), chown(2), lchown(2), fts(3), symlink(7)


     Previous versions of the chown utility used the dot ('.') character to
     distinguish the group name. This has been changed to be a colon (':')
     character so that user and group names may contain the dot character.

     The chown command is expected to be IEEE Std 1003.2 ("POSIX.2") compli-

MirOS BSD #10-current            May 20, 2007                                1

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