From 148b1dc133cbceb2af566e4a39d3486f41944028 Mon Sep 17 00:00:00 2001
From: Lisa Milne <lisamilne618@gmail.com>
Date: Tue, 7 Nov 2023 11:27:07 +1000
Subject: [PATCH] exec shell commands pt1

---
 clite/commands.js |  10 +++++
 clite/core.js     | 109 +++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 104 insertions(+), 15 deletions(-)
 create mode 100644 clite/commands.js

diff --git a/clite/commands.js b/clite/commands.js
new file mode 100644
index 0000000..462f529
--- /dev/null
+++ b/clite/commands.js
@@ -0,0 +1,10 @@
+clite.commands.data = function() {
+// insert commands below this line
+
+clite.commands.load('ls',function(args) {
+	clite.log.write('hello world (l)');
+	clite.shell.writeLine('hello world (s)');
+});
+
+// insert commands above this line
+}
diff --git a/clite/core.js b/clite/core.js
index be94180..6aa960e 100644
--- a/clite/core.js
+++ b/clite/core.js
@@ -52,12 +52,8 @@ var clite = {
 			script:function(name,callback) {
 				var head = document.getElementsByTagName('head')[0];
 				var script = document.createElement('script');
-				var file = '';
-				if (bios.lib.code.base != null)
-					file += bios.lib.code.base+'/';
-				file +=name+'.js';
 				script.type = 'text/javascript';
-				script.src = file;
+				script.src = name;
 				script.onload = callback;
 				head.appendChild(script);
 			},
@@ -103,7 +99,8 @@ var clite = {
 				return;
 			}
 			n.data.content = data;
-			n.perms = '-r--r-----';
+			n.perms = 'cr--r-----';
+			n.isdev = true;
 			var fd = clite.io.open('/dev/wfs');
 			var l;
 			while ((l = clite.io.readLine(fd)) != null) {
@@ -136,30 +133,96 @@ var clite = {
 				fn.name = clite.lib.basename(path);
 				fn.data.remote = url;
 				fn.data.content = null;
-				clite.log.write('added "'+path+'" ("'+fn.name+'")');
 			}
 			clite.io.close(fd);
-			// populate /dev (data/filesys.txt is /dev/wfs
+			// populate /dev (data/filesys.txt is /dev/wfs already)
 			clite.log.write('Populating /dev');
+				// TODO: are there any other devices we need?
+			// populate /bin
+			clite.log.write('Populating /bin');
+			// create a temporary function to load in commands
+			clite.commands = {
+				data:null,
+				load:function(name,fn) {
+					vfsapi.mkFile('/bin/'+name);
+					var f = vfsapi.getNode('/bin/'+name);
+					if (!f)
+						return;
+					f.perms = '-r-xr-xr-x';
+					f.data.content = fn;
+					clite.log.write('loaded ('+name+')');
+				}
+			}
+			clite.core.load.script('clite/commands.js',function() {
+				clite.core.execSafe(clite.commands.data);
+				clite.commands = null;
 			// check cookies for login
 			clite.log.write('Checking for user session');
-			// if new user:
-			//  read in /usr/share/introduction and write to shell
-			// if logged in:
-			// create user session
+			if (clite.user.init()) {// if logged in:
+				// create user session
+			}else{// if new user:
+				//  read in /usr/share/introduction and write to shell
+			}
 
 			clite.log.write('Creating Shell');
 			clite.events.refocus();
-			});
+			}); // end command load callback
+			}); // end filesys load callback
 
 		});
 	}
 };
 
+clite.user = {
+	init:function() { // returns true if there's a user login or false for guest
+		return false;
+	},
+	getUID:function() { // get the user's user id
+		return 0;
+	},
+	getGID:function() { // get the user's group id
+		return 0;
+	},
+	checkGID:function(gid) { // check if the user is in a group
+		return true;
+	}
+};
+
 clite.io = {
 	init:function() {
 		var vfsapi = clite.vfs.getApi();
 
+		var perms = {
+				// -rwxrwxrwx user1-3,group4-6,other7-9
+			checkReadable:function(p,uid,gid) {
+				if (p[7] == 'r')
+					return true;
+				if (clite.user.checkGID(gid) && p[4] == 'r')
+					return true;
+				if (uid == clite.user.getUID() && p[1] == 'r')
+					return true;
+				return false;
+			},
+			checkWritable:function(p,uid,gid) {
+				if (p[8] == 'w')
+					return true;
+				if (clite.user.checkGID(gid) && p[5] == 'w')
+					return true;
+				if (uid == clite.user.getUID() && p[2] == 'w')
+					return true;
+				return false;
+			},
+			checkExecutable:function(p,uid,gid) {
+				if (p[9] == 'x')
+					return true;
+				if (clite.user.checkGID(gid) && p[6] == 'x')
+					return true;
+				if (uid == clite.user.getUID() && p[3] == 'x')
+					return true;
+				return false;
+			}
+		};
+
 		function getFileDes(path,link) {
 			var n = vfsapi.getNode(path);
 			if (!n)
@@ -170,7 +233,9 @@ clite.io = {
 			var fd = Object.create({
 				node:n,
 				pos:0,
+				canread:false,
 				canwrite:false,
+				canexec:false,
 				remote:{
 					ispending:p,
 					callback:null
@@ -183,7 +248,9 @@ clite.io = {
 						fd.remote.callback(fd);
 					} catch(err) {}
 				});
-			// TODO check permissions to see if this is writable
+			fd.canread = perms.checkReadable(fd.node.perms,fd.node.uid,fd.node.gid);
+			fd.canwrite = perms.checkWritable(fd.node.perms,fd.node.uid,fd.node.gid);
+			fd.canexec = perms.checkExecutable(fd.node.perms,fd.node.uid,fd.node.gid);
 			return fd;
 		}
 		clite.io.creat = function(path,type) {
@@ -339,6 +406,7 @@ clite.vfs = {
 					remote:null,
 					isdir:false,
 					islink:false,
+					isdev:false,
 					parent:null,
 					content:null
 				}
@@ -587,7 +655,18 @@ clite.shell = {
 		clite.events.refocus();
 	},
 	exec:function(txt) {
-		// TODO: actually execute the command
+		// TODO: split this better
+		var args = txt.split(' ');
+		// TODO: resolve using PATH
+		var path = '/bin/'+args[0];
+		var fd = clite.io.open(path);
+		if (!fd) {
+			clite.shell.writeLine('Shell: unknown command: '+args[0]);
+			return;
+		}
+		if (!clite.core.execSafe(function() {fd.node.data.content(args)}))
+			clite.shell.writeLine('Shell: error in command:'+args[0]);
+		clite.io.close(fd);
 	},
 	parse:function(txt) {
 		if (txt.length < 1) {