busybox/console-tools/deallocvt.c
Denis Vlasenko 2afd5ab62c *: use get_console_fd() as appropriate, and make it fail on open error -
get_console_fd_or_die().

function                                             old     new   delta
get_console_fd_or_die                                  -     163    +163
loadkmap_main                                        211     201     -10
loadfont_main                                        440     430     -10
dumpkmap_main                                        218     208     -10
kbd_mode_main                                        158     146     -12
setkeycodes_main                                     156     143     -13
get_console_fd                                       163       -    -163
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/5 up/down: 163/-218)          Total: -55 bytes
2008-08-05 23:32:27 +00:00

34 lines
871 B
C

/* vi: set sw=4 ts=4: */
/*
* Disallocate virtual terminal(s)
*
* Copyright (C) 2003 by Tito Ragusa <farmatito@tiscali.it>
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* no options, no getopt */
#include "libbb.h"
/* From <linux/vt.h> */
enum { VT_DISALLOCATE = 0x5608 }; /* free memory associated to vt */
int deallocvt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int deallocvt_main(int argc UNUSED_PARAM, char **argv)
{
/* num = 0 deallocate all unused consoles */
int num = 0;
if (argv[1]) {
if (argv[2])
bb_show_usage();
num = xatou_range(argv[1], 1, 63);
}
/* double cast suppresses "cast to ptr from int of different size" */
xioctl(get_console_fd_or_die(), VT_DISALLOCATE, (void *)(ptrdiff_t)num);
return EXIT_SUCCESS;
}