From cc6f8f523585f82a3889c6ac504c7e0b07bd1ced Mon Sep 17 00:00:00 2001
From: Bill Joy <wnj@ucbvax.Berkeley.EDU>
Date: Sun, 30 Dec 1979 09:49:38 -0800
Subject: [PATCH] BSD 3 development Work on file usr/src/cmd/learn/start.c

Synthesized-from: 3bsd
---
 usr/src/cmd/learn/start.c | 52 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 usr/src/cmd/learn/start.c

diff --git a/usr/src/cmd/learn/start.c b/usr/src/cmd/learn/start.c
new file mode 100644
index 0000000000..2bb2f0a8d1
--- /dev/null
+++ b/usr/src/cmd/learn/start.c
@@ -0,0 +1,52 @@
+#include "stdio.h"
+#include <sys/types.h>
+#include <sys/dir.h>
+#include "lrnref"
+#define	ND	64
+
+start(lesson)
+char *lesson;
+{
+	struct direct dv[ND], *dm, *dp;
+	int f, c, n;
+	char where [100];
+
+	f = open(".", 0);
+	n = read(f, dv, ND*sizeof(*dp));
+	n /= sizeof(*dp);
+	if (n==ND)
+		fprintf(stderr, "lesson too long\n");
+	dm = dv+n;
+	for(dp=dv; dp<dm; dp++)
+		if (dp->d_ino) {
+			n = strlen(dp->d_name);
+			if (dp->d_name[n-2] == '.' && dp->d_name[n-1] == 'c')
+				continue;
+			c = dp->d_name[0];
+			if (c>='a' && c<= 'z')
+				unlink(dp->d_name);
+		}
+	close(f);
+	if (ask)
+		return;
+	sprintf(where, "../../%s/L%s", sname, lesson);
+	if (access(where, 04)==0)	/* there is a file */
+		return;
+	fprintf(stderr, "No lesson %s\n",lesson);
+	wrapup(1);
+}
+
+fcopy(new,old)
+char *new, *old;
+{
+	char b[BUFSIZ];
+	int n, fn, fo;
+	fn = creat(new, 0666);
+	fo = open(old,0);
+	if (fo<0) return;
+	if (fn<0) return;
+	while ( (n=read(fo, b, BUFSIZ)) > 0)
+		write(fn, b, n);
+	close(fn);
+	close(fo);
+}
-- 
2.20.1