/* ISC license. */

#include <sys/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/uint16.h>
#include <skalibs/uint.h>
#include <skalibs/tai.h>
#include <skalibs/strerr2.h>
#include <skalibs/djbunix.h>
#include "s6-svlisten.h"

#define USAGE "s6-svlisten1 [ -U | -u | -d | -D ] [ -t timeout ] servicedir prog..."
#define dieusage() strerr_dieusage(100, USAGE)

int main (int argc, char const *const *argv, char const *const *envp)
{
  s6_svlisten_t foo = S6_SVLISTEN_ZERO ;
  tain_t deadline, tto ;
  pid_t pid ;
  int spfd ;
  int wantup = 1, wantready = 0 ;
  uint16 id ;
  unsigned char upstate, readystate ;
  PROG = "s6-svlisten1" ;
  {
    subgetopt_t l = SUBGETOPT_ZERO ;
    unsigned int t = 0 ;
    for (;;)
    {
      register int opt = subgetopt_r(argc, argv, "uUdDt:", &l) ;
      if (opt == -1) break ;
      switch (opt)
      {
        case 'u' : wantup = 1 ; wantready = 0 ; break ;
        case 'U' : wantup = 1 ; wantready = 1 ; break ;
        case 'd' : wantup = 0 ; wantready = 0 ; break ;
        case 'D' : wantup = 0 ; wantready = 1 ; break ;
        case 't' : if (!uint0_scan(l.arg, &t)) dieusage() ; break ;
        default : dieusage() ;
      }
    }
    argc -= l.ind ; argv += l.ind ;
    if (t) tain_from_millisecs(&tto, t) ; else tto = tain_infinite_relative ;
  }
  if (!argc) dieusage() ;
  tain_now_g() ;
  tain_add_g(&deadline, &tto) ;
  spfd = s6_svlisten_selfpipe_init() ;
  s6_svlisten_init(1, argv, &foo, &id, &upstate, &readystate, &deadline) ;
  pid = child_spawn0(argv[1], argv + 1, envp) ;
  if (!pid) strerr_diefu2sys(111, "spawn ", argv[1]) ;
  return s6_svlisten_loop(&foo, wantup, wantready, 1, &deadline, spfd, &s6_svlisten_signal_handler) ;
}
