tb Handle keyboard inside of the shell interactive mode

user/tb/main.c

@@ -15,6 +15,11 @@
 #include <util/util.h>
 #include "interp.h"
 
+// keys
+#define C(X) ((X)-'@')
+
+#define LINEBUF_MAX 1024
+
 uint64_t PID;
 
 struct {
@@ -26,8 +31,6 @@ struct {
   bool logcmds;
 } CONFIG;
 
-#define LINEBUF_MAX 1024
-
 static Arg ARGS[] = {
   ARG("-m", ARG_STRING, &CONFIG.modestr),
   ARG("-f", ARG_STRING, &CONFIG.filepath),
@@ -99,19 +102,40 @@ void do_mode_interactive(void) {
   char linebuf[LINEBUF_MAX];
   size_t cursor;
   for(;;) {
+  begin:
     uprintf("tb# ");
 
     cursor = 0;
     string_memset(linebuf, 0, LINEBUF_MAX);
-    char c = 0;
-    while (c != '\n') {
-      int32_t rd = ipcpipe(PID, IPCPIPE_IN, IPCPIPE_READ, (uint8_t *)&c, 1);
-      if (rd > 0 && cursor < LINEBUF_MAX) {
-        linebuf[cursor++] = c;
-        uprintf("%c", c);
+
+    int32_t kbchr = 0;
+    for (;;) {
+      int32_t nrd = ipcpipe(PID, IPCPIPE_IN, IPCPIPE_READ, (uint8_t *)&kbchr, sizeof(kbchr));
+      if (nrd > 0) {
+        switch (kbchr) {
+          case C('C'):
+          case 0xE9:
+            uprintf("\n");
+            goto begin;
+            break;
+        }
+
+        char chr = kbchr & 0xFF;
+
+        if (chr == '\n') {
+          break;
+        }
+
+        if (string_chr_isascii(chr) && chr != 0 && cursor < LINEBUF_MAX) {
+          linebuf[cursor++] = chr;
+          uprintf("%c", chr);
+        }
       }
     }
-    linebuf[cursor - 1] = '\0';
+
+    if (cursor < LINEBUF_MAX) {
+      linebuf[cursor] = '\0';
+    }
     uprintf("\n");
     InterpResult *res;
     if (!interp_runstring(linebuf, &res, CONFIG.logcmds)) {