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/* vi: set sw=4 ts=4: */
/*
* disalloc.c - aeb - 940501 - Disallocate virtual terminal(s)
* Renamed deallocvt.
*/
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include "busybox.h"
/* From <linux/vt.h> */
static const int VT_DISALLOCATE = 0x5608; /* free memory associated to vt */
int deallocvt_main(int argc, char *argv[])
{
int fd, num=0;
if (argc > 2)
bb_show_usage();
fd = get_console_fd();
/* num=0 deallocate all unused consoles */
if (argc == 1)
goto disallocate_all;
num=bb_xgetlarg(argv[1], 10, 0, INT_MAX);
switch(num)
{
case 0:
bb_error_msg("0: illegal VT number");
break;
case 1:
bb_error_msg("VT 1 cannot be deallocated");
break;
default:
disallocate_all:
if (ioctl(fd, VT_DISALLOCATE, num))
bb_perror_msg_and_die("VT_DISALLOCATE");
return EXIT_SUCCESS;
}
return EXIT_FAILURE;
}
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