/* Custom /sbin/init for diskless Free/Net/OpenBSD test system */

#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#ifdef __FreeBSD__
#include <libutil.h>
#else
#include <util.h>
#endif

#define CONSOLE "/dev/console"

void errorexit(char *proc)
{
  syslog(LOG_ERR, "ERROR: %s() returned %s", proc, strerror(errno));
  exit(1);
}

void main(int argc, char *argv[])
{
  int status;
  int f;

  openlog("init", LOG_CONS|LOG_ODELAY, LOG_AUTH);

  status = setsid();
  if (status < 0) errorexit("setsid");

  status = setlogin("root");
  if (status < 0) errorexit("setlogin");

/* Open stdin, stdout, stderr */

  status = revoke(CONSOLE);
  if (status < 0) errorexit("revoke");

  f = open(CONSOLE, O_RDWR, 0);
  if (f < 0) errorexit("open");

  status = login_tty(f);
  if (status < 0) errorexit("login_tty");

/* Set default PATH */

  putenv("PATH=/bin:/sbin");

/* Run /etc/rc */

  system("/etc/rc");

/* Start a command shell */

  for (;;)
  {
    status = system("exec -sh");
    if (status == 9) sleep(60);		// Happens on halt or reboot
    if (status == 15) sleep(60);	// Happens on halt or reboot
  }
}