From 01a94cf8662ffe333b0b75fc98aa44ada4320aeb Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Tue, 1 Feb 2005 16:43:29 +0000
Subject: [PATCH] 	* pipe.cc (fhandler_pipe::open):  Allow re-opening of
 /proc/<pid>/fd 	pipes of the current process.

---
 winsup/cygwin/ChangeLog |  5 +++++
 winsup/cygwin/pipe.cc   | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 465b0716c..7a0cb6d00 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2005-02-01  Corinna Vinschen  <corinna@vinschen.de>
+
+	* pipe.cc (fhandler_pipe::open):  Allow re-opening of /proc/<pid>/fd
+	pipes of the current process.
+
 2005-02-01  Corinna Vinschen  <corinna@vinschen.de>
 
 	* fhandler.cc (fhandler_base::get_proc_fd_name): Don't generate
diff --git a/winsup/cygwin/pipe.cc b/winsup/cygwin/pipe.cc
index 988ee5731..6ce540695 100644
--- a/winsup/cygwin/pipe.cc
+++ b/winsup/cygwin/pipe.cc
@@ -38,6 +38,39 @@ fhandler_pipe::fhandler_pipe ()
 int
 fhandler_pipe::open (int flags, mode_t mode)
 {
+  const char *path = get_name ();
+  debug_printf ("path: %s", path);
+  if (!strncmp (get_name (), "/proc/", 6))
+    {
+      char *c;
+      HANDLE hdl;
+      int pid = strtol (path += 6, &c, 10);
+      if (!pid || !c || *c != '/')
+        goto out;
+      path = c;
+      if (strncmp (path, "/fd/pipe:[", 10))
+        goto out;
+      path += 10;
+      hdl = (HANDLE) atoi (path);
+      if (pid == myself->pid)
+        {
+	  cygheap_fdenum cfd;
+	  while (cfd.next () >= 0)
+	    {
+	      if (cfd->get_handle () == hdl)
+	        {
+		  if (!cfd->dup (this))
+		    return 1;
+		  return 0;
+		}
+	    }
+	}
+      else
+        {
+	  /* TODO: Open pipes of different process.  Is that possible? */
+	}
+    }
+out:
   set_errno (ENXIO);
   return 0;
 }