/*
 * Service monitor: status report
 *
 * Nickolai Zeldovich <kolya@MIT.EDU>
 * February 2002
 */

#include <async.h>
#include "svcmon.h"

static void
status_close (int s, bool ok)
{
  close (s);
}

static void
status_accept (vec<service *> svec, int fd)
{
  sockaddr_in sin;
  bzero (&sin, sizeof (sin));
  socklen_t sinlen = sizeof (sin);
  int s = accept (fd, (sockaddr *) &sin, &sinlen);
  if (s < 0)
    return;
  make_async (s);

  strbuf st ("%-45s %s\n", "             Service Description", "Status");
  for (unsigned int i = 0; i < svec.size (); i++) {
    service *svc = svec[i];
    bool ok = svc->ok ();
    st << strbuf ("%-45s %s%s\n",
		  svc->descr ().cstr (),
		  ok ? "up" : "down: ",
		  ok ? "" : svc->errmsg ().cstr ());
  }

  net_write (s, st, wrap (&status_close, s));
}

void
status_init (int port, vec<service *> svec)
{
  int fd = inetsocket (SOCK_STREAM, port, INADDR_ANY);
  if (fd < 0)
    fatal ("could not bind TCP port %d: %m\n", port);
  close_on_exec (fd);
  listen (fd, 5);
  fdcb (fd, selread, wrap (&status_accept, svec, fd));
}