Add rpmsqIsCaught() for testing if a signal has been caught

rpmio/rpmsq.c

@@ -171,6 +171,11 @@ static struct rpmsig_s {
     { -1,	NULL },
 };
 
+int rpmsqIsCaught(int signum)
+{
+    return sigismember(&rpmsqCaught, signum);
+}
+
 void rpmsqAction(int signum,
 		void * info, void * context)
 {

rpmio/rpmsq.h

@@ -53,6 +53,14 @@ struct rpmsqElem {
 
 extern sigset_t rpmsqCaught;
 
+/** \ingroup rpmsq
+ * Test if given signal has been caught (while signals blocked).
+ * Similar to sigismember() but operates on internal signal queue.
+ * @param signum	signal to test for
+ * @return		1 if caught, 0 if not and -1 on error
+ */
+int rpmsqIsCaught(int signum);
+
 /** \ingroup rpmsq
  * Default signal handler.
  * @param signum	signal number