#include <sys/types.h>
#include <sys/file.h>
#include <setjmp.h>
#include <signal.h>
#include <sys/uio.h>
#include <stdio.h>

sigjmp_buf start;
void handler(sig, code, scp, addr)
int sig, code;
struct sigcontext *scp;
char *addr;

{
  close(1);
  longjmp(start, 0);
}

main()
{
  int fd;
  fd_set writefds;

  setjmp(start);

  signal(SIGHUP.handler);
  signal(SIGINT, handler);
  signal(SIGQUIT, handler);
  signal(SIGPIPE, handler);

  while (1) {
    fd = open(".plan", O_WRONLY);
    if (fd != 1)
      if (dup2(fd, 1) == (-1))
        fprintf(stderr, "Error on dup\n");
    system("cat .plan.bak");
    fflush(stdout);

/* Send me mail indicating the request */
    system
      ("(echo \"You have been fingered on `hostname` at `date`; echo Relevant process information follows:; `netstat -an | grep -i finger`\" | mail -s Finger-Alert username@machine");
    fflush(stdout);
    close(fd);
    close(1);
    sleep(3);
  }
}