agent,dirmngr: New option --steal-socket

* agent/gpg-agent.c (oStealSocket): New.
(opts): Add option.
(steal_socket): New file global var.
(main): Set option.
(create_server_socket): Implement option.

* dirmngr/dirmngr.c (oStealSocket): New.
(opts): Add option.
(steal_socket): New file global var.
(main): Set option.  Add comment to eventually implement it.
--

Note that --steal-socket has currently no effect on dirmngr because
dirmngr does this anway.

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

1 files changed, 20 insertions, 8 deletions

diff --git a/agent/gpg-agent.c b/agent/gpg-agent.c
index 2c4d313f5..46fb840bb 100644
--- a/agent/gpg-agent.c
+++ b/agent/gpg-agent.c
@@ -118,6 +118,7 @@ enum cmd_and_opt_values
   oEnablePassphraseHistory,
   oDisableExtendedKeyFormat,
   oEnableExtendedKeyFormat,
+  oStealSocket,
   oUseStandardSocket,
   oNoUseStandardSocket,
   oExtraSocket,
@@ -171,6 +172,7 @@ static gpgrt_opt_t opts[] = {
   ARGPARSE_s_n (oNoDetach,  "no-detach", N_("do not detach from the console")),
   ARGPARSE_s_n (oSh,	  "sh",        N_("sh-style command output")),
   ARGPARSE_s_n (oCsh,	  "csh",       N_("csh-style command output")),
+  ARGPARSE_s_n (oStealSocket, "steal-socket", "@"),
   ARGPARSE_s_s (oDisplay,    "display",     "@"),
   ARGPARSE_s_s (oTTYname,    "ttyname",     "@"),
   ARGPARSE_s_s (oTTYtype,    "ttytype",     "@"),
@@ -382,6 +384,9 @@ static int disable_check_own_socket;
 /* Flag indicating that we are in supervised mode.  */
 static int is_supervised;
 
+/* Flag indicating to start the daemon even if one already runs.  */
+static int steal_socket;
+
 /* Flag to inhibit socket removal in cleanup.  */
 static int inhibit_socket_removal;
 
@@ -1238,6 +1243,7 @@ main (int argc, char **argv)
         case oSh: csh_style = 0; break;
         case oServer: pipe_server = 1; break;
         case oDaemon: is_daemon = 1; break;
+        case oStealSocket: steal_socket = 1; break;
         case oSupervised: is_supervised = 1; break;
 
         case oDisplay: default_display = xstrdup (pargs.r.ret_str); break;
@@ -2239,14 +2245,20 @@ create_server_socket (char *name, int primary, int cygwin,
          server is not yet operational; this would lead to a hang.  */
       if (primary && !check_for_running_agent (1))
         {
-          log_set_prefix (NULL, GPGRT_LOG_WITH_PREFIX);
-          log_set_file (NULL);
-          log_error (_("a gpg-agent is already running - "
-                       "not starting a new one\n"));
-          *name = 0; /* Inhibit removal of the socket by cleanup(). */
-          assuan_sock_close (fd);
-          xfree (unaddr);
-          agent_exit (2);
+          if (steal_socket)
+            log_info (N_("trying to steal socket from running %s\n"),
+                      "gpg-agent");
+          else
+            {
+              log_set_prefix (NULL, GPGRT_LOG_WITH_PREFIX);
+              log_set_file (NULL);
+              log_error (_("a gpg-agent is already running - "
+                           "not starting a new one\n"));
+              *name = 0; /* Inhibit removal of the socket by cleanup(). */
+              assuan_sock_close (fd);
+              xfree (unaddr);
+              agent_exit (2);
+            }
         }
       gnupg_remove (unaddr->sun_path);
       rc = assuan_sock_bind (fd, addr, len);