initial checkout from wrc

1 files changed, 56 insertions, 0 deletions

diff --git a/user/progDE.c b/user/progDE.c
new file mode 100644
index 0000000..a1aa0b3
--- /dev/null
+++ b/user/progDE.c
@@ -0,0 +1,56 @@
+#include <common.h>
+
+/**
+** User function main #2:  write
+**
+** Prints its ID, then loops N times delaying and printing, then returns
+** without calling exit(). Verifies the return byte count from each call
+** to write().
+**
+** Invoked as:  main2  x  n
+**	 where x is the ID character
+**		   n is the iteration count
+*/
+
+USERMAIN( main ) {
+	int n;
+	int count = 30;	  // default iteration count
+	char ch = '2';	  // default character to print
+	char buf[128];
+
+	// process the command-line arguments
+	switch( argc ) {
+	case 3:	count = str2int( argv[2], 10 );
+			// FALL THROUGH
+	case 2:	ch = argv[1][0];
+			break;
+	default:
+			sprint( buf, "main2: argc %d, args: ", argc );
+			cwrites( buf );
+			for( int i = 0; i <= argc; ++i ) {
+				sprint( buf, " %s", argv[argc] ? argv[argc] : "(null)" );
+				cwrites( buf );
+			}
+			cwrites( "\n" );
+	}
+
+	// announce our presence
+	n = swritech( ch );
+	if( n != 1 ) {
+		sprint( buf, "== %c, write #1 returned %d\n", ch, n );
+		cwrites( buf );
+	}
+
+	// iterate and print the required number of other characters
+	for( int i = 0; i < count; ++i ) {
+		DELAY(STD);
+		n = swritech( ch );
+		if( n != 1 ) {
+			sprint( buf, "== %c, write #2 returned %d\n", ch, n );
+			cwrites( buf );
+		}
+	}
+
+	// all done!
+	return( 0 );
+}