Fix BeOS, FreeBSD, MacOS porting problems reported by Bruno Haible.

[bison.git] / lib / subpipe.c

diff --git a/lib/subpipe.c b/lib/subpipe.c
index f20907174c2c3b58f64e8a091e0b67c9369aee9b..cfc94262c9b1b0672a9e622d92793822c45ffb66 100644 (file)
--- a/lib/subpipe.c
+++ b/lib/subpipe.c
@@ -114,6 +114,13 @@ create_subpipe (char const * const *argv, int fd[2])
       || (from_out_fd = fd_safer (pipe_fd[1])) < 0)
     error (EXIT_FAILURE, errno, "pipe");
 
+  /* Save the local variables in the parent now, in case vfork
+     clobbers them.  */
+  fd[0] = to_out_fd;
+  fd[1] = from_in_fd;
+  pipe_fd[0] = to_in_fd;
+  pipe_fd[1] = from_out_fd;
+
   pid = vfork ();
   if (pid < 0)
     error (EXIT_FAILURE, errno, "fork");
@@ -137,10 +144,8 @@ create_subpipe (char const * const *argv, int fd[2])
     }
 
   /* Parent.  */
-  close (to_in_fd);
-  close (from_out_fd);
-  fd[0] = to_out_fd;
-  fd[1] = from_in_fd;
+  close (pipe_fd[0]);
+  close (pipe_fd[1]);
   return pid;
 }