history when getting line from user in knob

1 files changed, 10 insertions, 7 deletions

diff --git a/src/user/highway/line.c b/src/user/highway/line.c
index 40dccfa..b5a54c5 100644
--- a/src/user/highway/line.c
+++ b/src/user/highway/line.c
@@ -57,25 +57,28 @@ void run_line(const char *original_line) {
   const char *space;
   for (space = line; *space && (*space != ' '); ++space)
     ;
-  if (blockequ(line, "source", space - line))
+  if (blockequ(line, "source ", 7))
     source(space + 1);
-  else if (blockequ(line, "set", space - line))
+  else if (blockequ(line, "set ", 4))
     set(space + 1);
-  else if (blockequ(line, "echo", space - line)) {
+  else if (blockequ(line, "echo ", 5)) {
     tell_user_sz(space + 1);
     tell_user_sz("\n");
   }
-  else if (blockequ(line, "vars", space - line))
+  else if (blockequ(line, "vars", 5))
     dump_vars();
-  else if (blockequ(line, "quit", space - line))
+  else if (blockequ(line, "quit", 5))
     __pcrt_quit();
-  else if (blockequ(line, "help", space - line))
+  else if (blockequ(line, "clear", 6))
+    _clear_screen();
+  else if (blockequ(line, "help", 5))
     tell_user_sz("Highway is a command shell for Portland OS. It includes variables and a couple\n"
                  "of pseudo-commands. Variables are addressed by surrounding with \"$\". The\n"
                  "following list shows each of the pseudo-commands.\n\n"
                  "  source FILE       run each command in FILE\n"
-                 "  set VAR VALUE     set $VAR$ to VALUE\n"
+                 "  clear             clear the screen\n"
                  "  echo STRING       print STRING\n"
+                 "  set VAR VALUE     set $VAR$ to VALUE\n"
                  "  vars              dump variables\n"
                  "  quit              exit highway\n"
                  "  help              show this\n");