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PT_CHOWN(5)			 GNU C Library			   PT_CHOWN(5)

NAME
       pt_chown	 - helper function for grantpt(3), changes ownship and permis‐
       sions of pseudotty

SYNOPSIS
       /usr/lib/pt_chown

DESCRIPTION
       pt_chown is the helper program for the 'grantpt' function.  It  is  not
       intended	 to  be	 run directly from the command line. pt_chown sets the
       owner, group and access permission of the slave pseudo terminal	corre‐
       sponding	 to  the  master  pseudo terminal passed on file descriptor so
       that the pseudo terminal can be used by the calling process. This means
       programs	 like  'xterm'	and 'screen' do not have to be setuid to get a
       pty. (There may be other reasons why they need privileges.)  If you are
       using  a	 2.1  or  newer	 Linux	kernel	with the 'devptsfs' or `devfs'
       filesystems providing pty slaves, you don't need this  program;	other‐
       wise   you   do.	   The	 source	  for  'pt_chown'  is  in  'login/pro‐
       grams/pt_chown.c'.

       It is installed setuid root.

OPTIONS
       pt_chown takes no arguments.

RETURN CODES
       pt_chown has the following return codes:

       EBADF  The file descriptor is not a valid master pseudo terminal.

       EINVAL The device is not a character device.

       EACCES Can't change device owner and group or device permissions.

       0      The owner, group, and permissions were successfully changed.

BUGS
       Report bugs using the glibcbug script to bugs@gnu.org

SEE ALSO
       grantpt(3)

PTY Control			  2003-03-21			   PT_CHOWN(5)

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