From 6cc1a9d90a48533532fbbb3f490550038a33eae6 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Fri, 25 Jan 2019 14:23:27 +0100
Subject: [PATCH] sh: Support basic backspacing on the command line.

It's weird that I didn't do this sooner. I don't know how many tims
I've had to retype a misspelled command. :^)
---
 Userland/sh.cpp | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/Userland/sh.cpp b/Userland/sh.cpp
index 38976a2751..2eb973455a 100644
--- a/Userland/sh.cpp
+++ b/Userland/sh.cpp
@@ -413,10 +413,19 @@ int main(int, char**)
             }
         }
         for (ssize_t i = 0; i < nread; ++i) {
-            putchar(keybuf[i]);
+            char ch = keybuf[i];
+            if (ch == 8) {
+                if (linedx == 0)
+                    continue;
+                linebuf[--linedx] = '\0';
+                putchar(ch);
+                fflush(stdout);
+                continue;
+            }
+            putchar(ch);
             fflush(stdout);
-            if (keybuf[i] != '\n') {
-                linebuf[linedx++] = keybuf[i];
+            if (ch != '\n') {
+                linebuf[linedx++] = ch;
                 linebuf[linedx] = '\0';
             } else {
                 runcmd(linebuf);