1#include <unistd.h>
 2#include <errno.h>
 3#include <fcntl.h>
 4#include "syscall.h"
 5
 6int fchdir(int fd)
 7{
 8	int ret = __syscall(SYS_fchdir, fd);
 9	if (ret != -EBADF || __syscall(SYS_fcntl, fd, F_GETFD) < 0)
10		return __syscall_ret(ret);
11
12	char buf[15+3*sizeof(int)];
13	__procfdname(buf, fd);
14	return syscall(SYS_chdir, buf);
15}