deallocvt.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * disalloc.c - aeb - 940501 - Disallocate virtual terminal(s)
   4  * Renamed deallocvt.
   5  */
   6 #include "internal.h"
   7 #include <stdlib.h>
   8 #include <fcntl.h>
   9 #include <sys/types.h>
  10 #include <sys/ioctl.h>
  11 #include <linux/vt.h>
  12 #include <stdio.h>
  13
  14 extern int getfd(void);
  15 char *progname;
  16
  17 int deallocvt_main(int argc, char *argv[])
  18 {
  19         int fd, num, i;
  20
  21         if ((argc != 2) || (**(argv + 1) == '-')) {
  22                 usage
  23                         ("deallocvt N\n\nDeallocate unused virtual terminal /dev/ttyN\n");
  24         }
  25
  26         progname = argv[0];
  27
  28         fd = get_console_fd("/dev/console");
  29
  30         if (argc == 1) {
  31                 /* deallocate all unused consoles */
  32                 if (ioctl(fd, VT_DISALLOCATE, 0)) {
  33                         perror("VT_DISALLOCATE");
  34                         exit(1);
  35                 }
  36         } else
  37                 for (i = 1; i < argc; i++) {
  38                         num = atoi(argv[i]);
  39                         if (num == 0)
  40                                 fprintf(stderr, "%s: 0: illegal VT number\n", progname);
  41                         else if (num == 1)
  42                                 fprintf(stderr, "%s: VT 1 cannot be deallocated\n",
  43                                                 progname);
  44                         else if (ioctl(fd, VT_DISALLOCATE, num)) {
  45                                 perror("VT_DISALLOCATE");
  46                                 fprintf(stderr, "%s: could not deallocate console %d\n",
  47                                                 progname, num);
  48                                 exit(1);
  49                         }
  50                 }
  51         exit(0);
  52 }