Always pass correct name to argv[0]. Ignore GPG_AGENT_INFO for gpg2.

* src/dirinfo.c (WANT_GPG_ONE_MODE): New.
(struct dirinfo): Add field "gpg_one_mode".
(get_gpgconf_item): Set that field and return it if requested.
(_gpgme_in_gpg_one_mode): New.
* src/engine-gpg.c (build_argv): Check GPG_AGENT_INFO only in gpg-1
mode.

* src/dirinfo.c (_gpgme_get_basename): New.
* src/engine-g13.c (g13_new): Take argv[0] from the pgmname.
* src/engine-gpgsm.c (gpgsm_new): Ditto.
* src/engine-gpg.c (build_argv): Ditto. Add arg PGMNAME.
(start): Pass PGMNAME to buildargv.

src/dirinfo.c

@@ -42,7 +42,8 @@ enum
     WANT_GPG_NAME,
     WANT_GPGSM_NAME,
     WANT_G13_NAME,
-    WANT_UISRV_SOCKET
+    WANT_UISRV_SOCKET,
+    WANT_GPG_ONE_MODE
   };
 
 /* Values retrieved via gpgconf and cached here.  */
@@ -56,6 +57,7 @@ static struct {
   char *gpgsm_name;
   char *g13_name;
   char *uisrv_socket;
+  int  gpg_one_mode;  /* System is in gpg1 mode.  */
 } dirinfo;
 
 
@@ -223,12 +225,14 @@ get_gpgconf_item (int what)
         {
           /* Probably gpgconf is not installed.  Assume we are using
              GnuPG-1.  */
+          dirinfo.gpg_one_mode = 1;
           pgmname = _gpgme_get_gpg_path ();
           if (pgmname)
             dirinfo.gpg_name = pgmname;
         }
       else
         {
+          dirinfo.gpg_one_mode = 0;
           read_gpgconf_dirs (pgmname, 0);
           read_gpgconf_dirs (pgmname, 1);
           dirinfo.gpgconf_name = pgmname;
@@ -268,6 +272,7 @@ get_gpgconf_item (int what)
     case WANT_GPGSM_NAME: result = dirinfo.gpgsm_name; break;
     case WANT_G13_NAME:   result = dirinfo.g13_name; break;
     case WANT_UISRV_SOCKET:  result = dirinfo.uisrv_socket; break;
+    case WANT_GPG_ONE_MODE: result = dirinfo.gpg_one_mode? "1":NULL; break;
     }
   UNLOCK (dirinfo_lock);
   return result;
@@ -323,3 +328,31 @@ _gpgme_get_default_uisrv_socket (void)
 {
   return get_gpgconf_item (WANT_UISRV_SOCKET);
 }
+
+/* Return true if we are in GnuPG-1 mode - ie. no gpgconf and agent
+   being optional.  */
+int
+_gpgme_in_gpg_one_mode (void)
+{
+  return !!get_gpgconf_item (WANT_GPG_ONE_MODE);
+}
+
+
+
+/* Helper function to return the basename of the passed filename.  */
+const char *
+_gpgme_get_basename (const char *name)
+{
+  const char *s;
+
+  if (!name || !*name)
+    return name;
+  for (s = name + strlen (name) -1; s >= name; s--)
+    if (*s == '/'
+#ifdef HAVE_W32_SYSTEM
+        || *s == '\\' || *s == ':'
+#endif
+        )
+      return s+1;
+  return name;
+}

src/engine-g13.c

@@ -216,6 +216,7 @@ g13_new (void **engine, const char *file_name, const char *home_dir)
 {
   gpgme_error_t err = 0;
   engine_g13_t g13;
+  const char *pgmname;
   int argc;
   const char *argv[5];
   char *dft_display = NULL;
@@ -232,8 +233,9 @@ g13_new (void **engine, const char *file_name, const char *home_dir)
   g13->status_cb.tag = 0;
   g13->status_cb.data = g13;
 
+  pgmname = file_name ? file_name : _gpgme_get_default_g13_name ();
   argc = 0;
-  argv[argc++] = "g13";
+  argv[argc++] = _gpgme_get_basename (pgmname);
   if (home_dir)
     {
       argv[argc++] = "--homedir";
@@ -250,13 +252,11 @@ g13_new (void **engine, const char *file_name, const char *home_dir)
   assuan_ctx_set_system_hooks (g13->assuan_ctx, &_gpgme_assuan_system_hooks);
 
 #if USE_DESCRIPTOR_PASSING
-  err = assuan_pipe_connect
+  err = assuan_pipe_connect (g13->assuan_ctx, pgmname, argv,
-    (g13->assuan_ctx, file_name ? file_name : _gpgme_get_default_g13_name (),
+                             NULL, NULL, NULL, ASSUAN_PIPE_CONNECT_FDPASSING);
-     argv, NULL, NULL, NULL, ASSUAN_PIPE_CONNECT_FDPASSING);
 #else
-  err = assuan_pipe_connect
+  err = assuan_pipe_connect (g13->assuan_ctx, pgmname, argv,
-    (g13->assuan_ctx, file_name ? file_name : _gpgme_get_default_g13_name (),
+                             NULL, NULL, NULL, 0);
-     argv, NULL, NULL, NULL, 0);
 #endif
   if (err)
     goto leave;

src/engine-gpg.c

@@ -718,7 +718,7 @@ gpg_set_command_handler (void *engine, engine_command_handler_t fnc,
 
 
 static gpgme_error_t
-build_argv (engine_gpg_t gpg)
+build_argv (engine_gpg_t gpg, const char *pgmname)
 {
   gpgme_error_t err;
   struct arg_and_data_s *a;
@@ -729,15 +729,20 @@ build_argv (engine_gpg_t gpg)
   int use_agent = 0;
   char *p;
 
-  /* We don't want to use the agent with a malformed environment
+  if (_gpgme_in_gpg_one_mode ())
-     variable.  This is only a very basic test but sufficient to make
+    {
-     our life in the regression tests easier. */
+      /* In GnuPG-1 mode we don't want to use the agent with a
+         malformed environment variable.  This is only a very basic
+         test but sufficient to make our life in the regression tests
+         easier.  With GnuPG-2 the agent is anyway required and on
+         modern installations GPG_AGENT_INFO is optional.  */
       err = _gpgme_getenv ("GPG_AGENT_INFO", &p);
       if (err)
         return err;
       use_agent = (p && strchr (p, ':'));
       if (p)
         free (p);
+    }
 
   if (gpg->argv)
     {
@@ -788,7 +793,7 @@ build_argv (engine_gpg_t gpg)
     }
 
   argc = datac = 0;
-  argv[argc] = strdup ("gpg"); /* argv[0] */
+  argv[argc] = strdup (_gpgme_get_basename (pgmname)); /* argv[0] */
   if (!argv[argc])
     {
       int saved_err = gpg_error_from_syserror ();
@@ -1292,6 +1297,7 @@ start (engine_gpg_t gpg)
   int status;
   struct spawn_fd_item_s *fd_list;
   pid_t pid;
+  const char *pgmname;
 
   if (!gpg)
     return gpg_error (GPG_ERR_INV_VALUE);
@@ -1317,7 +1323,8 @@ start (engine_gpg_t gpg)
 	return rc;
     }
 
-  rc = build_argv (gpg);
+  pgmname = gpg->file_name ? gpg->file_name : _gpgme_get_default_gpg_name ();
+  rc = build_argv (gpg, pgmname);
   if (rc)
     return rc;
 
@@ -1351,8 +1358,7 @@ start (engine_gpg_t gpg)
   fd_list[n].fd = -1;
   fd_list[n].dup_to = -1;
 
-  status = _gpgme_io_spawn (gpg->file_name ? gpg->file_name :
+  status = _gpgme_io_spawn (pgmname, gpg->argv,
-			    _gpgme_get_default_gpg_name (), gpg->argv,
                             IOSPAWN_FLAG_ALLOW_SET_FG,
                             fd_list, NULL, NULL, &pid);
   {

src/engine-gpgsm.c

@@ -239,6 +239,7 @@ gpgsm_new (void **engine, const char *file_name, const char *home_dir)
 {
   gpgme_error_t err = 0;
   engine_gpgsm_t gpgsm;
+  const char *pgmname;
   const char *argv[5];
   int argc;
 #if !USE_DESCRIPTOR_PASSING
@@ -321,8 +322,10 @@ gpgsm_new (void **engine, const char *file_name, const char *home_dir)
   child_fds[3] = -1;
 #endif
 
+  pgmname = file_name ? file_name : _gpgme_get_default_gpgsm_name ();
+
   argc = 0;
-  argv[argc++] = "gpgsm";
+  argv[argc++] = _gpgme_get_basename (pgmname);
   if (home_dir)
     {
       argv[argc++] = "--homedir";
@@ -339,10 +342,8 @@ gpgsm_new (void **engine, const char *file_name, const char *home_dir)
   assuan_ctx_set_system_hooks (gpgsm->assuan_ctx, &_gpgme_assuan_system_hooks);
 
 #if USE_DESCRIPTOR_PASSING
-  err = assuan_pipe_connect
+  err = assuan_pipe_connect (gpgsm->assuan_ctx, pgmname, argv,
-    (gpgsm->assuan_ctx,
+                             NULL, NULL, NULL, ASSUAN_PIPE_CONNECT_FDPASSING);
-     file_name ? file_name : _gpgme_get_default_gpgsm_name (),
-     argv, NULL, NULL, NULL, ASSUAN_PIPE_CONNECT_FDPASSING);
 #else
   {
     assuan_fd_t achild_fds[4];
@@ -352,10 +353,8 @@ gpgsm_new (void **engine, const char *file_name, const char *home_dir)
     for (i = 0; i < 4; i++)
       achild_fds[i] = (assuan_fd_t) child_fds[i];
 
-    err = assuan_pipe_connect
+    err = assuan_pipe_connect (gpgsm->assuan_ctx, pgmname, argv,
-      (gpgsm->assuan_ctx,
+                               achild_fds, NULL, NULL, 0);
-       file_name ? file_name : _gpgme_get_default_gpgsm_name (),
-       argv, achild_fds, NULL, NULL, 0);
 
     /* For now... */
     for (i = 0; i < 4; i++)

src/util.h

@@ -60,6 +60,9 @@ const char *_gpgme_get_default_gpgsm_name (void);
 const char *_gpgme_get_default_g13_name (void);
 const char *_gpgme_get_default_gpgconf_name (void);
 const char *_gpgme_get_default_uisrv_socket (void);
+int _gpgme_in_gpg_one_mode (void);
+
+const char *_gpgme_get_basename (const char *name);