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

extern const char *__progname;

int main(int, char **);
int main(int ac, char **av)
{
 int i;
 int errs;
 int nleft;
 int npids;
 int *pids;
 long int val;
 char *avp;

 pids = malloc(ac*sizeof(int));
 npids = 0;
 errs = 0;
 for (ac--,av++;ac;ac--,av++)
  { val = strtol(*av,&avp,0);
    if ((avp == *av) || *avp)
     { fprintf(stderr,"%s: bad number `%s'\n",__progname,*av);
       errs ++;
     }
    else if ((val <= 0) || (val > 30000))
     { fprintf(stderr,"%s: illegal PID %ld\n",__progname,val);
       errs ++;
     }
    else
     { pids[npids++] = val;
     }
  }
 if (errs)
  { exit(1);
  }
 while (1)
  { nleft = 0;
    for (i=0;i<npids;i++)
     { if (pids[i] == 0)
	{ continue;
	}
       if ((kill(pids[i],0) < 0) && (errno == ESRCH))
	{ pids[i] = 0;
	  continue;
	}
       nleft ++;
     }
    if (nleft < 1) exit(0);
    sleep(15);
  }
}