agent: Use new libassuan API for pipe server process.

* agent/call-daemon.c (struct wait_child_thread_parm_s): Remove PID
field.
(wait_child_thread): Don't touch the internals but call
assuan_pipe_wait_server_termination.
(daemon_start): Don't use PID.
(agent_daemon_dump_state): Don't use PID.
* agent/call-pinentry.c (watch_sock): Call assuan_pipe_kill_server.
(agent_popup_message_stop): Likewise.

--

GnuPG-bug-id: 6487
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

agent/call-daemon.c

@@ -98,7 +98,6 @@ static npth_mutex_t start_daemon_lock;
 struct wait_child_thread_parm_s
 {
   enum daemon_type type;
-  pid_t pid;
 };
 
 
@@ -109,54 +108,14 @@ wait_child_thread (void *arg)
   int err;
   struct wait_child_thread_parm_s *parm = arg;
   enum daemon_type type = parm->type;
-  pid_t pid =  parm->pid;
-#ifndef HAVE_W32_SYSTEM
-  int wstatus;
-#endif
   const char *name = opt.daemon_program[type];
   struct daemon_global_s *g = &daemon_global[type];
   struct daemon_local_s *sl;
 
   xfree (parm);  /* We have copied all data to the stack.  */
 
-#ifdef HAVE_W32_SYSTEM
+  assuan_pipe_wait_server_termination (g->primary_ctx, NULL, 0);
-  npth_unprotect ();
-  /* Note that although we use a pid_t here, it is actually a HANDLE.  */
-  WaitForSingleObject ((HANDLE)pid, INFINITE);
-  npth_protect ();
   log_info ("daemon %s finished\n", name);
-#else /* !HAVE_W32_SYSTEM*/
-
- again:
-  npth_unprotect ();
-  err = waitpid (pid, &wstatus, 0);
-  npth_protect ();
-
-  if (err < 0)
-    {
-      if (errno == EINTR)
-        goto again;
-      log_error ("waitpid for %s failed: %s\n", name, strerror (errno));
-      return NULL;
-    }
-  else
-    {
-      if (WIFEXITED (wstatus))
-        log_info ("daemon %s finished (status %d)\n",
-                  name, WEXITSTATUS (wstatus));
-      else if (WIFSIGNALED (wstatus))
-        log_info ("daemon %s killed by signal %d\n", name, WTERMSIG (wstatus));
-      else
-        {
-          if (WIFSTOPPED (wstatus))
-            log_info ("daemon %s stopped by signal %d\n",
-                      name, WSTOPSIG (wstatus));
-          goto again;
-        }
-
-      assuan_set_flag (g->primary_ctx, ASSUAN_NO_WAITPID, 1);
-    }
-#endif /*!HAVE_W32_SYSTEM*/
 
   agent_flush_cache (1);  /* Flush the PIN cache.  */
 
@@ -496,7 +455,6 @@ daemon_start (enum daemon_type type, ctrl_t ctrl)
       }
 
     wctp->type = type;
-    wctp->pid = assuan_get_pid (g->primary_ctx);
     err = npth_attr_init (&tattr);
     if (!err)
       {
@@ -561,10 +519,9 @@ agent_daemon_dump_state (void)
   for (i = 0; i < DAEMON_MAX_TYPE; i++) {
     struct daemon_global_s *g = &daemon_global[i];
 
-    log_info ("%s: name %s primary_ctx=%p pid=%ld reusable=%d\n", __func__,
+    log_info ("%s: name %s primary_ctx=%p reusable=%d\n", __func__,
 	      gnupg_module_name (daemon_modules[i]),
 	      g->primary_ctx,
-	      (long)assuan_get_pid (g->primary_ctx),
 	      g->primary_ctx_reusable);
     if (g->socket_name)
       log_info ("%s: socket='%s'\n", __func__, g->socket_name);

agent/call-pinentry.c

@@ -1288,8 +1288,6 @@ build_cmd_setdesc (char *line, size_t linelen, const char *desc)
 static void *
 watch_sock (void *arg)
 {
-  pid_t pid = assuan_get_pid (entry_ctx);
-
   while (1)
     {
       int err;
@@ -1317,17 +1315,7 @@ watch_sock (void *arg)
         break;
     }
 
-  if (pid == (pid_t)(-1))
+  assuan_pipe_kill_server (entry_ctx);
-    ; /* No pid available can't send a kill. */
-#ifdef HAVE_W32_SYSTEM
-  /* Older versions of assuan set PID to 0 on Windows to indicate an
-     invalid value.  */
-  else if (pid != (pid_t) INVALID_HANDLE_VALUE && pid != 0)
-    TerminateProcess ((HANDLE)pid, 1);
-#else
-  else if (pid > 0)
-    kill (pid, SIGINT);
-#endif
 
   return NULL;
 }
@@ -2122,7 +2110,6 @@ void
 agent_popup_message_stop (ctrl_t ctrl)
 {
   int rc;
-  pid_t pid;
 
   (void)ctrl;
 
@@ -2135,26 +2122,10 @@ agent_popup_message_stop (ctrl_t ctrl)
       return;
     }
 
-  pid = assuan_get_pid (entry_ctx);
+  if (popup_finished)
-  if (pid == (pid_t)(-1))
-    ; /* No pid available can't send a kill. */
-  else if (popup_finished)
     ; /* Already finished and ready for joining. */
-#ifdef HAVE_W32_SYSTEM
+  else
-  /* Older versions of assuan set PID to 0 on Windows to indicate an
+    assuan_pipe_kill_server (entry_ctx);
-     invalid value.  */
-  else if (pid != (pid_t) INVALID_HANDLE_VALUE
-	   && pid != 0)
-    {
-      HANDLE process = (HANDLE) pid;
-
-      /* Arbitrary error code.  */
-      TerminateProcess (process, 1);
-    }
-#else
-  else if (pid > 0)
-    kill (pid, SIGINT);
-#endif
 
   /* Now wait for the thread to terminate. */
   rc = npth_join (popup_tid, NULL);