1 files changed, 31 insertions, 0 deletions
diff --git a/src/assuan.c b/src/assuan.c
index b6dec93..772e892 100644
--- a/src/assuan.c
+++ b/src/assuan.c
@@ -36,6 +36,14 @@
 
 /* Global default state.  */
 
+/* Functions called before and after blocking syscalls.  */
+static void (*pre_syscall_func) (void);
+static void (*post_syscall_func) (void);
+
+/* Variable to see if functions above are initialized.  */
+static int _assuan_syscall_func_initialized;
+
+
 /* The default error source gor generated error codes.  */
 static gpg_err_source_t _assuan_default_err_source = GPG_ERR_SOURCE_USER_1;
 
@@ -106,6 +114,23 @@ assuan_set_system_hooks (assuan_system_hooks_t system_hooks)
 }
 
 
+/* Used before blocking system calls.  */
+void
+_assuan_pre_syscall (void)
+{
+  if (pre_syscall_func)
+    pre_syscall_func ();
+}
+
+
+/* Used after blocking system calls.  */
+void
+_assuan_post_syscall (void)
+{
+  if (post_syscall_func)
+    post_syscall_func ();
+}
+
 /* Create a new Assuan context.  The initial parameters are all needed
    in the creation of the context.  */
 gpg_error_t
@@ -116,6 +141,12 @@ assuan_new_ext (assuan_context_t *r_ctx, gpg_err_source_t err_source,
   struct assuan_context_s wctx;
   assuan_context_t ctx;
 
+  if (!_assuan_syscall_func_initialized)
+    {
+      gpgrt_get_syscall_clamp (&pre_syscall_func, &post_syscall_func);
+      _assuan_syscall_func_initialized = 1;
+    }
+
   /* Set up a working context so we can use standard functions.  */
   memset (&wctx, 0, sizeof (wctx));
   wctx.err_source = err_source;