}
else if (pid == 0)
{
- close (fd_pipe_in[1]);
- close (fd_pipe_out[0]);
+ int fd_num;
+ int fd;
+
+ /* Close all file descriptors but the pipe end we need. */
+ fd_num = getdtablesize ();
+ for (fd = 0; fd < fd_num; fd++)
+ {
+ if ((fd == fd_pipe_in[0]) || (fd == fd_pipe_out[1]))
+ continue;
+ close (fd);
+ }
/* If the `out' pipe has the filedescriptor STDIN we have to be careful
* with the `dup's below. So, if this is the case we have to handle the