Backport187

safe_mutex_lock(&time_thread.lock);

if (pthread_create(&time_thread.thread, 0, thread_timer, args) == 0) {

thread_init = 1;

pthread_atfork(0, 0, rb_thread_stop_timer);

#endif

pthread_cond_wait(&start, &time_thread.lock);

}

retry:

rb_thread_stop_timer();

#endif

switch ((pid = fork())) {

ruby_sourcefile, ruby_sourceline, pname);

_exit(127);

}

rb_thread_start_timer();

#endif

rb_io_synchronized(RFILE(orig_stdout)->fptr);

return Qnil;

case -1: /* fork failed */

rb_thread_start_timer();

#endif

if (errno == EAGAIN) {

break;

default: /* parent */

rb_thread_start_timer();

#endif

if (pid < 0) rb_sys_fail(pname);

fflush(stderr);

#endif

before_exec();

pid = fork();

after_exec();

chfunc = signal(SIGCHLD, SIG_DFL);

retry:

before_exec();

#endif

pid = fork();

rb_protect(proc_exec_args, (VALUE)&earg, NULL);

_exit(127);

}

after_exec();

#endif

if (pid < 0) {