Colony

#include "gtk_gui.h"

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <signal.h>

#include <sys/wait.h>

int create_robot(char *execname, int id)

{

  /* do shared memory stuff here */

  int child;

  if((child = fork())<0){

    printf("error with fork!\n");

    return -1;

  }

  char *envp[] = {"test=1", NULL};

  if(!child){

    /* restore default sigchld handler */

    signal(SIGCHLD, SIG_DFL);

    execve(execname, NULL, envp);  //TODO: keep the other env. stuff around

    printf ("error! exec failed\n");

    exit(-1);

  }

  return child;

}

void *sig_chld_handler(int sig)

{

  pid_t pid;

  int cstat;

  printf("SIGCHLD: parent waiting\n");

  pid = waitpid(0, &cstat, WUNTRACED);

  printf("got %d from %d\n", cstat, pid);

  kill(pid, SIGCONT);

  return NULL;

}

int main(int argc, char** argv)

{

  signal(SIGCHLD, sig_chld_handler);

  create_robot("robot_test/robot", 0);

  printf("returned to parent\n");

  gtk_gui_run(argc, argv);

  printf("parent exiting.\n");

  return 0;

}