Add source.

1 files changed, 32 insertions, 0 deletions

diff --git a/sdk/dev/waitsync.c b/sdk/dev/waitsync.c
new file mode 100644
index 0000000..f4596e1
--- /dev/null
+++ b/sdk/dev/waitsync.c
@@ -0,0 +1,32 @@
+/*
+ * Wait for a sync input value from a device.
+ * $Id$
+ * Copyright (c) 1997 by Tycho Softworks.
+ * For conditions of distribution and reuse see product license.
+ */
+
+#include <dev/tty.h>
+
+int	waitsync(int fd, uchar *list, size_t len, int timeout, ulong max)
+{
+	int	key;
+	int	idx;
+	uchar	buf;
+		
+	while(max--)
+	{
+		key = inkey(fd, timeout);
+		if(key < 0)
+			return key;
+	
+		buf = (uchar)(key & 0xff);
+		
+		for(idx = 0; idx < len; ++idx)
+			if(list[idx] == buf)
+				return buf;	
+	}
+	return -1;
+}
+
+				
+