src/deallocvt.c

   1 /*
   2  * disalloc.c - aeb - 940501 - Disallocate virtual terminal(s)
   3  * Renamed deallocvt.
   4  */
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <fcntl.h>
   8 #include <ctype.h>
   9 #include <sys/types.h>
  10 #include <sys/ioctl.h>
  11 #include <linux/vt.h>
  12 #include "getfd.h"
  13 #include "nls.h"
  14 #include "version.h"
  15
  16 int
  17 main(int argc, char *argv[]) {
  18         int fd, num, i;
  19
  20         if (argc < 1)           /* unlikely */
  21                 exit(1);
  22         set_progname(argv[0]);
  23
  24         setlocale(LC_ALL, "");
  25         bindtextdomain(PACKAGE_NAME, LOCALEDIR);
  26         textdomain(PACKAGE_NAME);
  27
  28         if (argc == 2 && !strcmp(argv[1], "-V"))
  29                 print_version_and_exit();
  30
  31         for (i = 1; i < argc; i++) {
  32                 if (!isdigit(argv[i][0])) {
  33                         fprintf(stderr, _("%s: unknown option\n"), progname);
  34                         exit(1);
  35                 }
  36         }
  37
  38         fd = getfd(NULL);
  39
  40         if (argc == 1) {
  41                 /* deallocate all unused consoles */
  42                 if (ioctl(fd,VT_DISALLOCATE,0)) {
  43                         perror("VT_DISALLOCATE");
  44                         fprintf(stderr,
  45                                 _("%s: deallocating all unused consoles failed\n"),
  46                                 progname);
  47                         exit(1);
  48                 }
  49         } else for (i = 1; i < argc; i++) {
  50                 num = atoi(argv[i]);
  51                 if (num == 0) {
  52                         fprintf(stderr,
  53                                 _("%s: 0: illegal VT number\n"), progname);
  54                         exit(1);
  55                 } else if (num == 1) {
  56                         fprintf(stderr,
  57                                 _("%s: VT 1 is the console and cannot be deallocated\n"),
  58                                 progname);
  59                         exit(1);
  60                 } else if (ioctl(fd,VT_DISALLOCATE,num)) {
  61                         perror("VT_DISALLOCATE");
  62                         fprintf(stderr,
  63                                 _("%s: could not deallocate console %d\n"),
  64                                 progname, num);
  65                         exit(1);
  66                 }
  67         }
  68         exit(0);
  69 }