From fadd46012c9974931add6c36e69636d3cbc6906f Mon Sep 17 00:00:00 2001
From: Benji Dial <benji6283@gmail.com>
Date: Sun, 20 Sep 2020 14:50:12 -0400
Subject: history when getting line from user in knob

---
 src/user/knob/block.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'src/user/knob/block.c')

diff --git a/src/user/knob/block.c b/src/user/knob/block.c
index 4ec0564..94bd073 100644
--- a/src/user/knob/block.c
+++ b/src/user/knob/block.c
@@ -1,5 +1,6 @@
-#include <stdint.h>
 #include <stdbool.h>
+#include <stdint.h>
+#include <knob/heap.h>
 
 //unsophisticated, should copy by dwords where available
 void blockcpy(void *to, const void *from, uint32_t size) {
@@ -23,4 +24,13 @@ uint32_t strcpy(char *to, const char *from) {
     to[i] = from[i];
   while (from[i++]);
   return i - 1;
+}
+
+char *strdup(const char *from) {
+  const char *end = from;
+  while (*(end++))
+    ;
+  char *buf = get_block(end - from);
+  blockcpy(buf, from, end - from);
+  return buf;
 }
\ No newline at end of file
-- 
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