4 files changed, 33 insertions, 0 deletions
diff --git a/src/assuan.c b/src/assuan.c
index c8397da..0332a24 100644
--- a/src/assuan.c
+++ b/src/assuan.c
@@ -114,6 +114,27 @@ assuan_set_system_hooks (assuan_system_hooks_t system_hooks)
 }
 
 
+gpg_error_t
+assuan_control (enum assuan_ctl_cmds cmd, void *arg)
+{
+  gpg_error_t err = 0;
+
+  (void)arg;
+  switch (cmd)
+    {
+    case ASSUAN_CONTROL_NOP:
+    default:
+      /* Nothing to do.  */
+      break;
+    case ASSUAN_CONTROL_REINIT_SYSCALL_CLAMP:
+      gpgrt_get_syscall_clamp (&pre_syscall_func, &post_syscall_func);
+      _assuan_syscall_func_initialized = 1;
+      break;
+    }
+
+  return err;
+}
+
 /* Used before blocking system calls.  */
 void
 _assuan_pre_syscall (void)
diff --git a/src/assuan.h.in b/src/assuan.h.in
index 99444b8..14492ec 100644
--- a/src/assuan.h.in
+++ b/src/assuan.h.in
@@ -154,6 +154,16 @@ void assuan_release (assuan_context_t ctx);
  * context CTX.  This is a convenience function.  */
 void assuan_free (assuan_context_t ctx, void *ptr);
 
+/* Codes used with the gcry_control function. */
+enum assuan_ctl_cmds
+  {
+    ASSUAN_CONTROL_NOP = 0,
+    ASSUAN_CONTROL_REINIT_SYSCALL_CLAMP = 1
+  };
+
+/* Perform control operations defined by CMD.  */
+gpg_error_t assuan_control (enum assuan_ctl_cmds cmd, void *arg);
+
 
 /* Set user-data in a context.  */
 void assuan_set_pointer (assuan_context_t ctx, void *pointer);
diff --git a/src/libassuan.def b/src/libassuan.def
index 088400b..1769a97 100644
--- a/src/libassuan.def
+++ b/src/libassuan.def
@@ -119,6 +119,7 @@ EXPORTS
     assuan_sock_accept                  @98
     assuan_pipe_wait_server_termination @99
     assuan_pipe_kill_server             @100
+    assuan_control                      @101
 
 ; END
 
diff --git a/src/libassuan.vers b/src/libassuan.vers
index 07612d4..1b33475 100644
--- a/src/libassuan.vers
+++ b/src/libassuan.vers
@@ -108,6 +108,7 @@ LIBASSUAN_1.0 {
     assuan_sock_accept;
     assuan_pipe_wait_server_termination;
     assuan_pipe_kill_server;
+    assuan_control;
 
     __assuan_close;
     __assuan_pipe;