/* 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; }