scd: New getinfo subcommand "dump_state".

* scd/command.c (cmd_getinfo): Add subcommand.  Always init CTRL for
simplicity.
--

A state dump looks like

  app_dump_state: card=0x00007f1b38017c90 slot=1 type=yubikey refcount=1
  app_dump_state:   app=0x00007f1b38018100 type='openpgp'
  app_dump_state:   app=0x00007f1b3800cb70 type='piv'
  app_dump_state: card=0x00007f1b38013a10 slot=0 type=gnuk refcount=0
  app_dump_state:   app=0x00007f1b38016fc0 type='openpgp'

and can also be triggered by a SIGUSR1.  This explicit command allows
to dump the state also on Windows.  Use for example

  gpg-connect-agent 'scd getinfo dump_state' /bye

1 files changed, 7 insertions, 4 deletions

diff --git a/scd/command.c b/scd/command.c
index 6e1a6e223..b607523dd 100644
--- a/scd/command.c
+++ b/scd/command.c
@@ -1877,11 +1877,13 @@ static const char hlp_getinfo[] =
   "              - Return a list of active apps on all inserted cards.\n"
   "  cmd_has_option CMD OPT\n"
   "              - Returns OK if command CMD has option OPT.\n"
+  "  dump_state  - Dump internal infos to the log stream.\n"
   "  apdu_strerror NUMBER\n"
   "              - Return a string for a status word.\n";
 static gpg_error_t
 cmd_getinfo (assuan_context_t ctx, char *line)
 {
+  ctrl_t ctrl = assuan_get_pointer (ctx);
   int rc = 0;
   const char *s;
 
@@ -1901,6 +1903,7 @@ cmd_getinfo (assuan_context_t ctx, char *line)
            && (line[14] == ' ' || line[14] == '\t' || !line[14]))
     {
       char *cmd, *cmdopt;
+
       line += 14;
       while (*line == ' ' || *line == '\t')
         line++;
@@ -1946,7 +1949,6 @@ cmd_getinfo (assuan_context_t ctx, char *line)
     }
   else if (!strcmp (line, "status"))
     {
-      ctrl_t ctrl = assuan_get_pointer (ctx);
       char flag;
 
       if (open_card (ctrl))
@@ -1983,13 +1985,11 @@ cmd_getinfo (assuan_context_t ctx, char *line)
     }
   else if (!strcmp (line, "card_list"))
     {
-      ctrl_t ctrl = assuan_get_pointer (ctx);
 
       rc = app_send_card_list (ctrl);
     }
   else if (!strcmp (line, "active_apps"))
     {
-      ctrl_t ctrl = assuan_get_pointer (ctx);
       card_t card = card_get (ctrl, NULL);
 
       if (!card)
@@ -2002,7 +2002,6 @@ cmd_getinfo (assuan_context_t ctx, char *line)
     }
   else if (!strcmp (line, "all_active_apps"))
     {
-      ctrl_t ctrl = assuan_get_pointer (ctx);
       rc = app_send_active_apps (NULL, ctrl);
     }
   else if ((s=has_leading_keyword (line, "apdu_strerror")))
@@ -2011,6 +2010,10 @@ cmd_getinfo (assuan_context_t ctx, char *line)
       s = apdu_strerror (ul);
       rc = assuan_send_data (ctx, s, strlen (s));
     }
+  else if (!strcmp (line, "dump_state"))
+    {
+      app_dump_state ();
+    }
   else
     rc = set_error (GPG_ERR_ASS_PARAMETER, "unknown value for WHAT");
   return rc;