1 files changed, 41 insertions, 0 deletions
diff --git a/trigger.c b/trigger.c
new file mode 100644
index 0000000..39f81b8
--- /dev/null
+++ b/trigger.c
@@ -0,0 +1,41 @@
+#include "select.h"
+#include "open.h"
+#include "trigger.h"
+#include "hasnpbg1.h"
+
+static int fd = -1;
+#ifdef HASNAMEDPIPEBUG1
+static int fdw = -1;
+#endif
+
+void trigger_set()
+{
+ if (fd != -1)
+   close(fd);
+#ifdef HASNAMEDPIPEBUG1
+ if (fdw != -1)
+   close(fdw);
+#endif
+ fd = open_read("lock/trigger");
+#ifdef HASNAMEDPIPEBUG1
+ fdw = open_write("lock/trigger");
+#endif
+}
+
+void trigger_selprep(nfds,rfds)
+int *nfds;
+fd_set *rfds;
+{
+ if (fd != -1)
+  {
+   FD_SET(fd,rfds);
+   if (*nfds < fd + 1) *nfds = fd + 1;
+  }
+}
+
+int trigger_pulled(rfds)
+fd_set *rfds;
+{
+ if (fd != -1) if (FD_ISSET(fd,rfds)) return 1;
+ return 0;
+}