RESIZECONS - phpMan

RESIZECONS(8)                   Console Support                  RESIZECONS(8)



NAME
       resizecons - change kernel idea of the console size

SYNOPSIS
       resizecons COLSxROWS
       resizecons -lines ROWS

DESCRIPTION
       The  resizecons  command  tries  to change the videomode of the console.  There are
       several aspects to this: (a) the kernel must know about it, (b) the  hardware  must
       know  about it, (c) user programs must know about it, (d) the console font may have
       to be adapted.

       (a) The kernel is told about the change using the ioctl VT_RESIZE.  This causes the
       kernel to reallocate console screen memory for all virtual consoles, and might fail
       if there is not enough memory.  (In that case, try to disallocate some virtual con-
       soles first.)  If this ioctl succeeds, but a later step fails (e.g., because you do
       not have root permissions), you may be left with a very messy screen.

       The most difficult part of this is (b), since it requires detailed knowledge of the
       video  card hardware, and the setting of numerous registers. Only changing the num-
       ber of rows is slightly easier, and resizecons will try to  do  that  itself,  when
       given the -lines option. (Probably, root permission will be required.)  The command
       resizecons COLSxROWS will execute restoretextmode -r COLSxROWS (and hence  requires
       that you have svgalib installed). Here COLSxROWS is a file that was created earlier
       by restoretextmode -w COLSxROWS.  Again, either root permissions are  required,  or
       restoretextmode has to be suid root.

       In  order  to  deal with (c), resizecons does a ‘stty rows ROWS cols COLS’ for each
       active console (in the range tty0..tty15), and sends a SIGWINCH signal to selection
       if it finds the file /tmp/selection.pid.

       Finally,  (d)  is dealt with by executing a setfont command. Most likely, the wrong
       font is loaded, and you may want to do another setfont yourself afterwards.


BUGS
       resizecons does not work on all hardware.  This command used to be  called  resize,
       but was renamed to avoid conflict with another command with the same name.


SEE ALSO
       setfont(8), stty(1), selection(1), restoretextmode(8), disalloc(8)




Local                             17 Jan 1995                    RESIZECONS(8)

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