/* This file is in the public domain. */

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <strings.h>

extern const char *__progname;

#include "vars.h"
#include "config.h"
#include "pollloop.h"

/*
 * Main program for scd, the daemon.
 *
 * This is fairly simple: crack the arglist, set up variables, reload
 *  the config, and drop in the main polling loop.  (Reloading the
 *  config will establish polling fds and block functions as
 *  appropriate.)
 *
 * Usage: $0 [-config configfile]
 *
 * Default configfile name is set in vars.c.
 */

static void handleargs(int ac, char **av)
{
 int skip;
 int errs;

 skip = 0;
 errs = 0;
 for (ac--,av++;ac;ac--,av++)
  { if (skip > 0)
     { skip --;
       continue;
     }
    if (**av != '-')
     { fprintf(stderr,"%s: extra argument `%s'\n",__progname,*av);
       errs = 1;
       continue;
     }
    if (0)
     {
needarg:;
       fprintf(stderr,"%s: %s needs a following argument\n",__progname,*av);
       errs = 1;
       continue;
     }
#define WANTARG() do { if (++skip >= ac) goto needarg; } while (0)
    if (!strcmp(*av,"-config"))
     { WANTARG();
       configfile = av[skip];
       continue;
     }
#undef WANTARG
    fprintf(stderr,"%s: unrecognized option `%s'\n",__progname,*av);
    errs = 1;
  }
 if (errs) exit(1);
}

static void init(void)
{
 conf = 0;
 init_polling();
}

int main(int, char **);
int main(int ac, char **av)
{
 handleargs(ac,av);
 init();
 reload_config();
 if (! conf) exit(1);
 while (1)
  { pre_poll();
    if (do_poll() < 0)
     { if (errno == EINTR) continue;
       fprintf(stderr,"%s: poll: %s",__progname,strerror(errno));
       exit(1);
     }
    post_poll();
  }
}