1 /* $OpenBSD: uthread_dup.c,v 1.5 2003/02/05 05:51:51 marc Exp $ */
2 /* PUBLIC DOMAIN <marc@snafu.org> */
3 
4 #include <unistd.h>
5 #ifdef _THREAD_SAFE
6 #include <pthread.h>
7 #include "pthread_private.h"
8 
9 int
dup(int fd)10 dup(int fd)
11 {
12 	int             ret;
13 
14 	ret = _FD_LOCK(fd, FD_RDWR, NULL);
15 	if (ret == 0) {
16 		ret = _thread_sys_dup(fd);
17 		if (ret != -1)
18 			if (_thread_fd_table_dup(fd, ret) == -1) {
19 				close(ret);
20 				ret = -1;
21 			}
22 		_FD_UNLOCK(fd, FD_RDWR);
23 	}
24 	return (ret);
25 }
26 #endif
27