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w32: Make pipes really pollable.

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* 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>
This commit is contained in:
Werner Koch 2017-02-28 09:34:29 +01:00
parent f5782e11a5
commit 1192449207
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
2 changed files with 15 additions and 2 deletions
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12
common/exechelp-w32.c
View File

@ -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 ();

5
common/exectool.c
View File

@ -384,7 +384,12 @@ gnupg_exec_tool_stream (const char *pgmname, const char *argv[],
/* Now find the argument marker and replace by the pipe's fd.
Yeah, that is an ugly non-thread safe hack but it safes us to
create a copy of the array. */
#ifdef HAVE_W32_SYSTEM
snprintf (extrafdbuf, sizeof extrafdbuf, "-&%lu",
(unsigned long)(void*)_get_osfhandle (extrapipe[0]));
#else
snprintf (extrafdbuf, sizeof extrafdbuf, "-&%d", extrapipe[0]);
#endif
for (argsaveidx=0; argv[argsaveidx]; argsaveidx++)
if (!strcmp (argv[argsaveidx], "-&@INEXTRA@"))
{