asshelp.c: add a lot of debug logging

[gnupg2.git] / agent / gpg-agent.c

diff --git a/agent/gpg-agent.c b/agent/gpg-agent.c
index 82c8ae0621a443e604cb785711aaa16925f9e6a4..0e53549479f56044d4b26a9de2482193a41ceddd 100644 (file)
--- a/agent/gpg-agent.c
+++ b/agent/gpg-agent.c
@@ -382,6 +382,9 @@ static char *current_logfile;
    watched. */
 static pid_t parent_pid = (pid_t)(-1);
 
+/* Record the pid of the main thread, for easier signalling */
+static pid_t main_thread_pid = (pid_t)(-1);
+
 /* Number of active connections.  */
 static int active_connections;
 
@@ -2020,7 +2023,7 @@ get_agent_scd_notify_event (void)
                                  GetCurrentProcess(), &h2,
                                  EVENT_MODIFY_STATE|SYNCHRONIZE, TRUE, 0))
         {
-          log_error ("setting syncronize for scd notify event failed: %s\n",
+          log_error ("setting synchronize for scd notify event failed: %s\n",
                      w32_strerror (-1) );
           CloseHandle (h);
         }
@@ -2264,6 +2267,26 @@ create_directories (void)
 }
 
 
+static int
+need_tick (void)
+{
+#ifdef HAVE_W32_SYSTEM
+  /* We do not know how to interrupt the select loop on Windows, so we
+     always need a short tick there. */
+  return 1;
+#else
+  /* if we were invoked like "gpg-agent cmd arg1 arg2" then we need to
+     watch our parent. */
+  if (parent_pid != (pid_t)(-1))
+    return 1;
+  /* if scdaemon is running, we need to check that it's alive */
+  if (agent_scd_check_running ())
+    return 1;
+  /* otherwise, nothing fine-grained to do. */
+  return 0;
+#endif /*HAVE_W32_SYSTEM*/
+}
+
 
 /* This is the worker for the ticker.  It is called every few seconds
    and may only do fast operations. */
@@ -2322,7 +2345,7 @@ agent_sigusr2_action (void)
 
 #ifndef HAVE_W32_SYSTEM
 /* The signal handler for this program.  It is expected to be run in
-   its own trhead and not in the context of a signal handler.  */
+   its own thread and not in the context of a signal handler.  */
 static void
 handle_signal (int signo)
 {
@@ -2346,6 +2369,10 @@ handle_signal (int signo)
       agent_sigusr2_action ();
       break;
 
+      /* nothing to do here, just take an extra cycle on the select loop */
+    case SIGCONT:
+      break;
+
     case SIGTERM:
       if (!shutdown_pending)
         log_info ("SIGTERM received - shutting down ...\n");
@@ -2684,6 +2711,13 @@ start_connection_thread_ssh (void *arg)
 }
 
 
+void interrupt_main_thread_loop (void)
+{
+#ifndef HAVE_W32_SYSTEM
+  kill (main_thread_pid, SIGCONT);
+#endif
+}
+
 /* helper function for readability: test whether a given struct
    timespec is set to all-zeros */
 static inline int
@@ -2752,8 +2786,10 @@ handle_connections (gnupg_fd_t listen_fd,
   npth_sigev_add (SIGUSR1);
   npth_sigev_add (SIGUSR2);
   npth_sigev_add (SIGINT);
+  npth_sigev_add (SIGCONT);
   npth_sigev_add (SIGTERM);
   npth_sigev_fini ();
+  main_thread_pid = getpid ();
 #else
 # ifdef HAVE_W32CE_SYSTEM
   /* Use a dummy event. */
@@ -2765,6 +2801,7 @@ handle_connections (gnupg_fd_t listen_fd,
 # endif
 #endif
 
+
   if (disable_check_own_socket)
     my_inotify_fd = -1;
   else if ((err = gnupg_inotify_watch_socket (&my_inotify_fd, socket_name)))
@@ -2855,6 +2892,11 @@ handle_connections (gnupg_fd_t listen_fd,
          thus a simple assignment is fine to copy the entire set.  */
       read_fdset = fdset;
 
+      /* avoid a fine-grained timer if we don't need one: */
+      timertbl[0].interval.tv_sec = need_tick () ? TIMERTICK_INTERVAL : 0;
+      /* avoid waking up to check sockets if we can count on inotify */
+      timertbl[1].interval.tv_sec = (my_inotify_fd == -1) ? CHECK_OWN_SOCKET_INTERVAL : 0;
+
       /* loop through all timers, fire any registered functions, and
          plan next timer to trigger */
       npth_clock_gettime (&curtime);