For those of you who experience errors like "can't open pseudo-tty"
or any other errors related to openning tty here is the information you
need to read :

If you have glibc2 installed , and you compiled Unix98 PTY support in 
to the linux kernel, then you need to do some additional configuration 
stuff. Here is the excerpt from Documentation/Changes file, supplied with
Linux kernel 2.2.* :

***************** Documentation/Changes excerpt starts *********************

   The most current version should always be available from
http://cyberbuzz.gatech.edu/kaboom/linux/ as well.


   As of 2.1.115, support for the deprecated major 4 /dev/ttyp* devices
was removed.  If necessary (eg, you get "out of pty" error messages when
you obviously are not out of pty's), create major 3 /dev/tty* and major
2 /dev/pty* devices (see Documentation/devices.txt for more
information).  In general, you should make sure that your /dev
directory is up-to-date if you are experiencing any problems.

   Optional support for Unix98 pty devices has also been added. If you
want to use the Unix98 ptys, you should be running at least
glibc-2.0.9x, and you must switch completely to Unix98 pty's.  The
general procedure for configuring Unix98 pty support is:

- Compile your kernel with CONFIG_UNIX98_PTYS and CONFIG_DEVPTS_FS.
- mknod /dev/ptmx c 5 2
  chmod 666 /dev/ptmx
  mkdir /dev/pts
- Add to /etc/fstab:

  none            /dev/pts        devpts	gid=5,mode=620    0 0

   (Note:  gid=5 is applicable for RedHat systems for which group "tty" has
   gid 5.  Adjust according to your distribution.  Use mode=600 if you want
   "mesg n" to be default.)
- Mount /dev/pts

***************** Documentation/Changes excerpt ends ***********************