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From: Alon Bar-Lev <alon.barlev@gmail.com>
To: cygwin@cygwin.com
Subject: Strange pthread_atfork() behavior
Date: Mon, 17 Mar 2008 22:48:45 +0200
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Hello,

Please CC my as I am not subscribed.

Just notice a difference between Linux and cygwin, hope
someone will be able to figure it out.

When running this program on Linux I get expected behavior.

When running under cygwin the exec program runs after about 60 seconds.
The following is the output:

__atfork_prepare
__atfork_parent
before sleep
__atfork_child
after sleep
<parent is not running anymore>
<wait about 60 seconds>
      56 [main] a 2952 sig_send: wait for sig_complete event failed, signal -34, rc 258, Win32 error 0 at child
<child output>

Any clue?

Regards,
Alon Bar-Lev.

---

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

static void __atfork_prepare  (void) {printf ("__atfork_prepare\n");}
static void __atfork_parent (void) {printf ("__atfork_parent\n");}
static void __atfork_child (void) {printf ("__atfork_child\n");}

int main (void) {
	pthread_atfork (__atfork_prepare, __atfork_parent, __atfork_child);

	if (fork () == 0) {
		printf ("at child\n");
		execl ("/bin/ls", "/bin/ls", NULL);
	}

	printf ("before sleep\n");
	sleep (10);
	printf ("after sleep\n");
}

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