X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/040984073a54b4c603172be3c3f44b908ea5deb9..5362ed19b6e8a8091345d979eefb4e11087b728f:/lib/subpipe.c

diff --git a/lib/subpipe.c b/lib/subpipe.c
index 7f8e44f2..a6764d37 100644
--- a/lib/subpipe.c
+++ b/lib/subpipe.c
@@ -1,6 +1,6 @@
 /* Subprocesses with pipes.
 
-   Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -19,7 +19,7 @@
 /* Written by Paul Eggert <eggert@twinsun.com>
    and Florian Krohm <florian@edamail.fishkill.ibm.com>.  */
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
 
@@ -71,6 +71,18 @@
 #include "gettext.h"
 #define _(Msgid)  gettext (Msgid)
 
+#ifndef __attribute__
+/* This feature is available in gcc versions 2.5 and later.  */
+# if ! defined __GNUC__ || __GNUC__ < 2 || \
+(__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
+#  define __attribute__(Spec) /* empty */
+# endif
+#endif
+
+#ifndef ATTRIBUTE_UNUSED
+# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#endif
+
 
 /* Initialize this module.  */
 
@@ -101,19 +113,15 @@ create_subpipe (char const * const *argv, int fd[2])
   int child_fd[2];
   pid_t pid;
 
-  if (pipe (child_fd) != 0
-      || (child_fd[0] = fd_safer (child_fd[0])) < 0
-      || (fd[0] = fd_safer (child_fd[1])) < 0
-      || pipe (pipe_fd) != 0
-      || (fd[1] = fd_safer (pipe_fd[0])) < 0
-      || (child_fd[1] = fd_safer (pipe_fd[1])) < 0)
-    error (EXIT_FAILURE, errno,
-	   "pipe");
+  if (pipe_safer (child_fd) != 0 || pipe_safer (pipe_fd) != 0)
+    error (EXIT_FAILURE, errno, "pipe");
+  fd[0] = child_fd[1];
+  fd[1] = pipe_fd[0];
+  child_fd[1] = pipe_fd[1];
 
   pid = vfork ();
   if (pid < 0)
-    error (EXIT_FAILURE, errno,
-	   "fork");
+    error (EXIT_FAILURE, errno, "fork");
 
   if (! pid)
     {
@@ -148,8 +156,7 @@ reap_subpipe (pid_t pid, char const *program)
 #if HAVE_WAITPID || defined waitpid
   int wstatus;
   if (waitpid (pid, &wstatus, 0) < 0)
-    error (EXIT_FAILURE, errno,
-	   "waitpid");
+    error (EXIT_FAILURE, errno, "waitpid");
   else
     {
       int status = WIFEXITED (wstatus) ? WEXITSTATUS (wstatus) : -1;
@@ -166,3 +173,9 @@ reap_subpipe (pid_t pid, char const *program)
     }
 #endif
 }
+
+void
+end_of_output_subpipe (pid_t pid ATTRIBUTE_UNUSED,
+		       int fd[2] ATTRIBUTE_UNUSED)
+{
+}