common: Allow a second input stream for gnupg_exec_tool_stream.

* common/exechelp-posix.c (do_exec): Add arg 'except' and pass to
close_all_fds.
(gnupg_spawn_process): Add arg 'except'.  Change callers to pass NULL
for it.
* common/exechelp-w32.c (gnupg_spawn_process): Add dummy arg 'except'.
* common/exechelp-w32ce.c (gnupg_spawn_process): Ditto.
* common/exectool.c (copy_buffer_do_copy): Allow NULL for SINK.
(gnupg_exec_tool_stream): Add arg 'inextra'. Change callers to pass
NULL for it.  Allow NULL for OUTPUT.
--

This hack is a first step to allow calling gpg for verification of
signatures.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 7 insertions, 6 deletions

diff --git a/common/exechelp-posix.c b/common/exechelp-posix.c
index a7a9a929d..aefb6539c 100644
--- a/common/exechelp-posix.c
+++ b/common/exechelp-posix.c
@@ -278,7 +278,7 @@ get_all_open_fds (void)
 static void
 do_exec (const char *pgmname, const char *argv[],
          int fd_in, int fd_out, int fd_err,
-         void (*preexec)(void) )
+         int *except, void (*preexec)(void) )
 {
   char **arg_list;
   int i, j;
@@ -324,7 +324,7 @@ do_exec (const char *pgmname, const char *argv[],
     }
 
   /* Close all other files. */
-  close_all_fds (3, NULL);
+  close_all_fds (3, except);
 
   if (preexec)
     preexec ();
@@ -420,7 +420,7 @@ gnupg_create_pipe (int filedes[2])
 /* Fork and exec the PGMNAME, see exechelp.h for details.  */
 gpg_error_t
 gnupg_spawn_process (const char *pgmname, const char *argv[],
-                     void (*preexec)(void), unsigned int flags,
+                     int *except, void (*preexec)(void), unsigned int flags,
                      estream_t *r_infp,
                      estream_t *r_outfp,
                      estream_t *r_errfp,
@@ -525,7 +525,8 @@ gnupg_spawn_process (const char *pgmname, const char *argv[],
       gcry_control (GCRYCTL_TERM_SECMEM);
       es_fclose (outfp);
       es_fclose (errfp);
-      do_exec (pgmname, argv, inpipe[0], outpipe[1], errpipe[1], preexec);
+      do_exec (pgmname, argv, inpipe[0], outpipe[1], errpipe[1],
+               except, preexec);
       /*NOTREACHED*/
     }
 
@@ -575,7 +576,7 @@ gnupg_spawn_process_fd (const char *pgmname, const char *argv[],
     {
       gcry_control (GCRYCTL_TERM_SECMEM);
       /* Run child. */
-      do_exec (pgmname, argv, infd, outfd, errfd, NULL);
+      do_exec (pgmname, argv, infd, outfd, errfd, NULL, NULL);
       /*NOTREACHED*/
     }
 
@@ -728,7 +729,7 @@ gnupg_spawn_process_detached (const char *pgmname, const char *argv[],
         for (i=0; envp[i]; i++)
           putenv (xstrdup (envp[i]));
 
-      do_exec (pgmname, argv, -1, -1, -1, NULL);
+      do_exec (pgmname, argv, -1, -1, -1, NULL, NULL);
 
       /*NOTREACHED*/
     }