Function start_child

app/master/daemon/master/master_spawn.cpp:168–239

}

static void start_child(ACL_MASTER_SERV *serv)
{
	const char *myname = "start_child";
	int n, i;
	ACL_MASTER_NV *nv;

	if (serv->type != ACL_MASTER_SERV_TYPE_NONE) {
		prepare_child_fds(serv);
	}

	/* Redirect stdout to local file */
	if (serv->stdout_log) {
		int oflags = O_APPEND | O_WRONLY | O_CREAT;
		int fd = open(serv->stdout_log, oflags, 0600);
		if (fd >= 0 && fd != 1) {
			dup2(fd, 1);
			close(fd);
		}
	}

	/* Redirect stderr to local file */
	if (serv->stderr_log) {
		int oflags = O_APPEND | O_WRONLY | O_CREAT;
		int fd = open(serv->stderr_log, oflags, 0600);
		if (fd >= 0 && fd != 2) {
			dup2(fd, 2);
			close(fd);
		}
	}

	acl_vstring_sprintf(env_gen, "%s=%o", ACL_MASTER_GEN_NAME,
		master_generation);
	if (putenv(acl_vstring_str(env_gen)) < 0) {
		acl_msg_fatal("%s: putenv: %s", myname, strerror(errno));
	}

	n = acl_array_size(serv->children_env);
	for (i = 0; i < n; i++) {
		nv = (ACL_MASTER_NV *) acl_array_index(serv->children_env, i);
		if (nv == NULL) {
			break;
		}
		setenv(nv->name, nv->value, 1);
	}

	/* Begin to call the child process */
	if (acl_msg_verbose) {
		acl_msg_info("%s: cmd = %s", myname, serv->path);
	}

	/* Help app to change working directory */
	if (serv->home && *serv->home) {
		if (chdir(serv->home) == -1) {
			acl_msg_error("%s: chdir to %s error %s",
				myname, serv->home, acl_last_serror());
		} else {
			acl_msg_info("%s: %s chdir to %s ok",
				myname, serv->path, serv->home);