🚀 go-pugleaf

In article <MAX.92Dec16102112@Kolmogorov.gac.edu>
max@Kolmogorov.gac.edu (Max Hailperin) (yes that's me) writes:

   [A bunch of stuff about tape read errors that would have been
    correct, except that I'm brain dead and got "allow" and "inhibit"
    backwards.]

The correct mode of operation for restoring from a DAT drive is
*inhibit* illegal length, *not* allow.  This is what Sears's
workaround does by using the exabyte device.  The correct solution,
then, is *not* the mtalill program I posted, but rather the converse,
which I naturally call mtinill.  This is what I actually run in my
/etc/rc.local.  Please excuse my earlier error.

#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <nextdev/scsireg.h>
#include <sys/file.h>

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

  if(argc != 2){
    fprintf(stderr, "Usage: %s device\n", argv[0]);
    exit(1);
    }

  if((fd = open(argv[1], O_RDONLY, 0)) < 0){
    perror(argv[1]);
    exit(1);
  }

  if(ioctl(fd, MTIOCINILL, NULL) < 0){
    perror("doing MTIOCINILL ioctl");
    exit(1);
  }

  if(close(fd) < 0){
    perror("closing");
    exit(1);
  }

  exit(0);
}