w32: Make pipes really pollable.

* common/exectool.c (gnupg_exec_tool_stream) [W32]: Use _get_osfhandle
to print the fd for the command line.
* common/exechelp-w32.c (create_pipe_and_estream): Use es_sysopen so
that the streams are actually pollable.
--

This addresses two bugs:

 - Using the "-&@INEXTRA@" kludges requires that we pass the value of
   the handle on the command line and not the libc fd.

 - gpgrt_poll requires the use of the ReadFile/WriteFile backend which
   is currently only used when the stream has been created with
   gpgrt_sysopen.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 10 insertions, 2 deletions

diff --git a/common/exechelp-w32.c b/common/exechelp-w32.c
index e79ee5b14..2c44e2c75 100644
--- a/common/exechelp-w32.c
+++ b/common/exechelp-w32.c
@@ -309,6 +309,7 @@ create_pipe_and_estream (int filedes[2], int flags,
 {
   gpg_error_t err = 0;
   HANDLE fds[2];
+  es_syshd_t syshd;
 
   filedes[0] = filedes[1] = -1;
   err = my_error (GPG_ERR_GENERAL);
@@ -337,10 +338,17 @@ create_pipe_and_estream (int filedes[2], int flags,
 
   if (! err && r_fp)
     {
+      syshd.type = ES_SYSHD_HANDLE;
       if (!outbound)
-        *r_fp = es_fdopen (filedes[0], nonblock? "r,nonblock" : "r");
+        {
+          syshd.u.handle = fds[0];
+          *r_fp = es_sysopen (&syshd, nonblock? "r,nonblock" : "r");
+        }
       else
-        *r_fp = es_fdopen (filedes[1], nonblock? "w,nonblock" : "w");
+        {
+          syshd.u.handle = fds[1];
+          *r_fp = es_sysopen (&syshd, nonblock? "w,nonblock" : "w");
+        }
       if (!*r_fp)
         {
           err = my_error_from_syserror ();