From e7bc50ca8ffcaa6ed68ebd2315f78b0f5a7d10ad Mon Sep 17 00:00:00 2001
From: klaar36 <klas.arvidsson@liu.se>
Date: Fri, 20 Mar 2015 17:30:24 +0100
Subject: Initial Pintos

---
 src/examples/line_echo.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 src/examples/line_echo.c

(limited to 'src/examples/line_echo.c')

diff --git a/src/examples/line_echo.c b/src/examples/line_echo.c
new file mode 100644
index 0000000..5aa5ee9
--- /dev/null
+++ b/src/examples/line_echo.c
@@ -0,0 +1,60 @@
+/* klaar@ida
+
+   pintos --fs-disk=2 -v -k -p ../examples/line_echo -a line_echo -- -f -q run line_echo
+
+   This program will echo every input line to output.
+ */
+
+#include <stdio.h>
+#include <syscall.h>
+
+int mystrlen(char *start);
+int getline(char *buf, int size);
+
+int main(void)
+{
+  char buf[10];
+  int length;
+  char endl = '\n';
+
+  for ( ; ; )
+  {
+    length = getline(buf, 10);
+    
+    if (length != mystrlen(buf))
+      exit(111);
+
+    if (length < 1)
+      break;
+    
+    write(STDOUT_FILENO, buf, length);
+    write(STDOUT_FILENO, &endl, 1);
+  }
+  
+  return 0;
+}
+
+int getline(char *buf, int size)
+{
+  int i;
+  
+  for (i = 0; i < size-1; ++i)
+  {
+    if (read(STDIN_FILENO, &buf[i], 1) != 1)
+      break;
+    if (buf[i] == '\n')
+      break;
+  }
+  buf[i] = '\0';
+  return i;
+}
+
+int mystrlen(char *start)
+{
+  char* end = start;
+  
+  while(*end != '\0')
+    ++end;
+  
+  return (end - start);
+}
-- 
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