Use linenoise to add simple editing and history to the Android shell.

The linenoise library is from http://github.com/antirez/linenoise

This patch also disables command-line editing and history from adb. The
adb implementation was shadowing the Android shell's implementation.

The adb implementation was also shadowing the editing and history
implementation in alternative shells such as BusyBox's ash.

Change-Id: I7ebd4cb391d0ce966c0ce0e707d80ecd659f9079

1 files changed, 43 insertions, 0 deletions

diff --git a/sh/input.c b/sh/input.c
index a81fd7b18..9377bd025 100644
--- a/sh/input.c
+++ b/sh/input.c
@@ -64,6 +64,10 @@ __RCSID("$NetBSD: input.c,v 1.39 2003/08/07 09:05:32 agc Exp $");
 #include "parser.h"
 #include "myhistedit.h"
 
+#ifdef WITH_LINENOISE
+#include "linenoise.h"
+#endif
+
 #define EOF_NLEFT -99		/* value of parsenleft when EOF pushed back */
 
 MKINIT
@@ -203,6 +207,45 @@ retry:
 
 	} else
 #endif
+#ifdef WITH_LINENOISE
+    if (parsefile->fd == 0) {
+        static char *rl_start;
+        static const char *rl_cp;
+        static int el_len;
+
+        if (rl_cp == NULL) {
+            rl_cp = rl_start = linenoise(getprompt(""));
+            if (rl_cp != NULL) {
+                el_len = strlen(rl_start);
+                if (el_len != 0) {
+                    /* Add non-blank lines to history. */
+                    linenoiseHistoryAdd(rl_start);
+                }
+                out2str("\r\n");
+                /* Client expects a newline at end of input, doesn't expect null */
+                rl_start[el_len++] = '\n';
+            }
+        }
+        if (rl_cp == NULL)
+            nr = 0;
+        else {
+            nr = el_len;
+            if (nr > BUFSIZ - 8)
+                nr = BUFSIZ - 8;
+            memcpy(buf, rl_cp, nr);
+            if (nr != el_len) {
+                el_len -= nr;
+                rl_cp += nr;
+            } else {
+                rl_cp = 0;
+                if (rl_start != NULL) {
+                    free(rl_start);
+                    rl_start = NULL;
+                }
+            }
+        }
+    } else
+#endif
 		nr = read(parsefile->fd, buf, BUFSIZ - 8);