1/* vi: set sw=4 ts=4: */ 2/* 3 * disalloc.c - aeb - 940501 - Disallocate virtual terminal(s) 4 * Renamed deallocvt. 5 */ 6#include <stdlib.h> 7#include <stdio.h> 8#include <fcntl.h> 9#include <sys/types.h> 10#include <sys/ioctl.h> 11#include "busybox.h" 12 13/* From <linux/vt.h> */ 14static const int VT_DISALLOCATE = 0x5608; /* free memory associated to vt */ 15 16int deallocvt_main(int argc, char *argv[]) 17{ 18 int fd, num, i; 19 20 //if ((argc > 2) || ((argv == 2) && (**(argv + 1) == '-'))) 21 if (argc > 2) 22 show_usage(); 23 24 fd = get_console_fd("/dev/console"); 25 26 if (argc == 1) { 27 /* deallocate all unused consoles */ 28 if (ioctl(fd, VT_DISALLOCATE, 0)) 29 perror_msg_and_die("VT_DISALLOCATE"); 30 } else { 31 for (i = 1; i < argc; i++) { 32 num = atoi(argv[i]); 33 if (num == 0) 34 error_msg("0: illegal VT number"); 35 else if (num == 1) 36 error_msg("VT 1 cannot be deallocated"); 37 else if (ioctl(fd, VT_DISALLOCATE, num)) 38 perror_msg_and_die("VT_DISALLOCATE"); 39 } 40 } 41 42 return EXIT_SUCCESS; 43} 44