X-Git-Url: http://git.tuebingen.mpg.de/?a=blobdiff_plain;f=signal.c;h=aa63c8b5461a9627c021a514b83b7c8ee1067067;hb=8aa0f575bcca12ab63ab53141c2144448c457478;hp=2d5549d59817b151ae6780fa43e083f881c81ea9;hpb=3d875f51dcbb6b07c4698d0696b8b946997e6373;p=paraslash.git

diff --git a/signal.c b/signal.c
index 2d5549d5..aa63c8b5 100644
--- a/signal.c
+++ b/signal.c
@@ -147,6 +147,46 @@ void para_install_sighandler(int sig)
 	para_sigaction(sig, &generic_signal_handler);
 }
 
+/**
+ * Block a signal for the caller.
+ *
+ * \param sig The signal to block.
+ *
+ * This sets the given signal in the current signal mask of the calling process
+ * to prevent this signal from delivery.
+ *
+ * \sa \ref para_unblock_signal(), sigprocmask(2), sigaddset(3).
+ */
+void para_block_signal(int sig)
+{
+	sigset_t set;
+
+	PARA_DEBUG_LOG("blocking signal %d\n", sig);
+	sigemptyset(&set);
+	sigaddset(&set, sig);
+	sigprocmask(SIG_BLOCK, &set, NULL);
+}
+
+/**
+ * Unblock a signal.
+ *
+ * \param sig The signal to unblock.
+ *
+ * This function removes the given signal from the current set of blocked
+ * signals.
+ *
+ * \sa \ref para_block_signal(), sigprocmask(2), sigaddset(3).
+ */
+void para_unblock_signal(int sig)
+{
+	sigset_t set;
+
+	PARA_DEBUG_LOG("unblocking signal %d\n", sig);
+	sigemptyset(&set);
+	sigaddset(&set, sig);
+	sigprocmask(SIG_UNBLOCK, &set, NULL);
+}
+
 /**
  * Return the number of the next pending signal.
  *