OpenBSD-4.6/lib/libpthread/uthread/uthread_dup.c

/* $OpenBSD: uthread_dup.c,v 1.7 2006/09/26 14:18:28 kurt Exp $ */
/* PUBLIC DOMAIN <marc@snafu.org> */

#include <unistd.h>
#ifdef _THREAD_SAFE
#include <pthread.h>
#include "pthread_private.h"

int
dup(int fd)
{
	int             ret;

	ret = _FD_LOCK(fd, FD_RDWR, NULL);
	if (ret == 0) {
		ret = _thread_sys_dup(fd);
		if (ret != -1) {
			if (_thread_fd_table_init(ret, FD_INIT_DUP,
			    _thread_fd_table[fd]->status_flags) == -1) {
				_thread_sys_close(ret);
				ret = -1;
			}
		}
		_FD_UNLOCK(fd, FD_RDWR);
	}
	return (ret);
}
#endif