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deallocvt.c

/*
 * disalloc.c - aeb - 940501 - Disallocate virtual terminal(s)
 * Renamed deallocvt.
 */
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <linux/vt.h>
#include "getfd.h"
#include "nls.h"
#include "version.h"

int
main(int argc, char *argv[]) {
      int fd, num, i;

      if (argc < 1)           /* unlikely */
            exit(1);
      set_progname(argv[0]);

      setlocale(LC_ALL, "");
      bindtextdomain(PACKAGE, LOCALEDIR);
      textdomain(PACKAGE);

      if (argc == 2 && !strcmp(argv[1], "-V"))
            print_version_and_exit();

      for (i = 1; i < argc; i++) {
            if (!isdigit(argv[i][0])) {
                  fprintf(stderr, _("%s: unknown option\n"), progname);
                  exit(1);
            }
      }

      fd = getfd(NULL);

      if (argc == 1) {
            /* deallocate all unused consoles */
            if (ioctl(fd,VT_DISALLOCATE,0)) {
                  perror("VT_DISALLOCATE");
                  fprintf(stderr,
                        _("%s: deallocating all unused consoles failed\n"),
                        progname);
                  exit(1);
            }
      } else for (i = 1; i < argc; i++) {
            num = atoi(argv[i]);
            if (num == 0) {
                  fprintf(stderr,
                        _("%s: 0: illegal VT number\n"), progname);
                  exit(1);
            } else if (num == 1) {
                  fprintf(stderr,
                        _("%s: VT 1 is the console and cannot be deallocated\n"),
                        progname);
                  exit(1);
            } else if (ioctl(fd,VT_DISALLOCATE,num)) {
                  perror("VT_DISALLOCATE");
                  fprintf(stderr,
                        _("%s: could not deallocate console %d\n"),
                        progname, num);
                  exit(1);
            }
      }
      exit(0);
}

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