mailing list of musl libc

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 #include <unistd.h>
#include <string.h>
#include "syscall.h"
#include "libc.h"
#include "pthread_impl.h"

WEAK_PROVIDE_INT;
weak_alias(__weak_dummy_int,  __fork_handler);

pid_t fork(void)
{
	pid_t ret;
	__fork_handler(-1);
	ret = syscall(SYS_fork);
	if (libc.main_thread && !ret) {
		pthread_t self = __pthread_self();
		self->tid = self->pid = syscall(SYS_getpid);
		memset(&self->robust_list, 0, sizeof self->robust_list);
		libc.threads_minus_1 = 0;
		libc.main_thread = self;
	}
	__fork_handler(!ret);
	return ret;
}