From 7ceb503feeb87821402c916f7dc6c736144f2994 Mon Sep 17 00:00:00 2001
From: Lisa Milne <lisamilne618@gmail.com>
Date: Sun, 17 Dec 2023 14:57:15 +1000
Subject: [PATCH] add the start of shell history saving

---
 clite/shell.js | 36 ++++++++++++++++++++++++++++++++++--
 1 file changed, 34 insertions(+), 2 deletions(-)

diff --git a/clite/shell.js b/clite/shell.js
index 21ee312..63de40f 100644
--- a/clite/shell.js
+++ b/clite/shell.js
@@ -89,11 +89,10 @@ clite.commands.load('sh',function(args,env,io) {
 			return 1;
 		},
 		exit:function(args,io) {
-			has_exited = true;
 			var ev = 0;
 			if (args.length > 1)
 				ev = parseInt(args[1]);
-			io.exit(ev);
+			doShellExit(ev);
 			return 0;
 		}
 	};
@@ -102,6 +101,27 @@ clite.commands.load('sh',function(args,env,io) {
 		data:[],
 		current:'',
 		index:0,
+		load:function() {
+			let path = clite.resolvePath('~/.shhistory');
+			let fd = stdio.open(path,stdio.flags.O_RDONLY|stdio.flags.O_SYNC);
+			if (!fd)
+				return;
+			var e;
+			while ((e = stdio.readLine(fd)) != null) {
+				history.add(e);
+			}
+			stdio.close(fd);
+		},
+		save:function() {
+			let path = clite.resolvePath('~/.shhistory');
+			let fd = stdio.open(path,stdio.flags.O_WRONLY|stdio.flags.O_TRUNC|stdio.flags.O_CREAT|stdio.flags.O_SYNC);
+			if (!fd)
+				return;
+			history.data.forEach(function(l) {
+				stdio.write(fd,l+'\n');
+			});
+			stdio.close(fd);
+		},
 		add:function(txt) {
 			if (txt.length < 1)
 				return;
@@ -816,6 +836,13 @@ Options:
 `);
 	}
 
+	function doShellExit(v) {
+		history.save();
+		stdio.write(io.stdout,'\n');
+		has_exited = true;
+		io.exit(v);
+	}
+
 	function resolvePATH(txt) {
 		// special case of test command
 		if (txt == '[')
@@ -953,6 +980,10 @@ Options:
 
 		function inputProcess(str) {
 			switch (str) {
+			case String.fromCharCode(4):
+			case 4:
+				doShellExit(0);
+				break;
 			case '\t': // tab
 			case 9:
 				var ct = tabfill(c);
@@ -1075,6 +1106,7 @@ Options:
 			parser.queue(env.HOME+'/.shrc');
 			parser.run(function() {
 				history.clear();
+				history.load();
 				inputRead();
 			});
 		}