js now returns output

com/isoterminal/core.js

@@ -1,3 +1,11 @@
+//ISOTerminal.prototype.exec(cmd_array,stdin){
+//  // exec(['lua'] "print \"hello\") ---> cat /dev/browser/js/stdin | lua > /dev/browser/js/stdout
+//}
+
+ISOTerminal.prototype.send = function(ttyNr, str){
+  this.toUint8Array( str ).map( (c) => this.emulator.bus.send(`serial${ttyNr}-input`, c ) )
+}
+
 ISOTerminal.prototype.toUint8Array = function(str) {
   str = String(str) || String("")
   // Create a new Uint8Array with the same length as the input string
@@ -17,6 +25,9 @@ ISOTerminal.prototype.runISO = function(opts){
   if( opts.iso.match(/\.bin$/) ) image.bzimage = { url: opts.iso }
 
   let emulator = this.emulator = new V86({ ...image,
+    uart1:true, // /dev/ttyS1
+    uart2:true, // /dev/ttyS2
+    uart3:true, // /dev/ttyS3
     wasm_path:        "com/isoterminal/v86.wasm",
     memory_size:      32 * 1024 * 1024,
     vga_memory_size:  2 * 1024 * 1024,

com/isoterminal/feat/9pfs_utils.js

@@ -2,32 +2,6 @@ ISOTerminal.addEventListener('emulator-started', function(){
   let emulator    = this.emulator
   let isoterminal = this 
 
-  emulator.fs9p.Read = async function(inodeid, offset, count){
-    let file
-    const inode    = this.inodes[inodeid];
-    const inodeDir = this.GetParent(inode.fid)
-
-    if( !inodeDir ){ // undefined = /mnt
-      for( const [name,childid] of this.inodes[0].direntries ){
-        if( childid == inode.fid ){ file = name }
-      }
-    }
-
-    if( file ){
-      let data = {promise:false, file}
-      isoterminal.emit('file-read', data)
-      // if( data.promise ){ return await data.promise } // *FIX* size already 
-    }
-
-    if(this.is_forwarder(inode))
-    {
-        const foreign_id = inode.foreign_id;
-        return await this.follow_fs(inode).Read(foreign_id, offset, count);
-    }
-
-    return await this.get_data(inodeid, offset, count);
-  };
-
   emulator.fs9p.update_file = async function(file,data){
 
       const p = this.SearchPath(file);

com/isoterminal/feat/boot.js

@@ -10,7 +10,7 @@ ISOTerminal.prototype.boot = async function(){
       env.push( 'export '+String(i).toUpperCase()+'="'+document.location[i]+'"')
   }
   await this.emulator.create_file("profile.browser", this.toUint8Array( env.join('\n') ) )
-  let boot = `source /mnt/profile ; js "$(cat /mnt/profile.js)"`
+  let boot = `source /mnt/profile`
   // exec hash as extra boot cmd
   if( document.location.hash.length > 1 ){ 
     boot += ` ; cmd='${decodeURI(document.location.hash.substr(1))}' && $cmd`

com/isoterminal/feat/javascript.js

@@ -9,9 +9,16 @@ ISOTerminal.addEventListener('init', function(){
       const buf = await emulator.read_file("dev/browser/js")
       const decoder = new TextDecoder('utf-8');
       const script = decoder.decode(buf)
+      let PID="?"
       try{
+        if( script.match(/^PID/) ){ 
+          PID = script.match(/^PID=([0-9]+);/)[1] 
+        }
         let res = (new Function(`${script}`))()
         if( res && typeof res != 'string' ) res = JSON.stringify(res,null,2)
+        // write output to 9p with PID as filename
+        // *FIXME* not flexible / robust
+        emulator.create_file(PID, this.toUint8Array(res) )
       }catch(e){ 
         console.error(e)
       }

com/isoterminal/mnt/js

@@ -1,4 +1,5 @@
 #!/bin/sh
+PID=$$
 test -z "$1" && { echo "Usage: js 'somefunction(1)'"; exit 0; }
 
 test -n "$BROWSER" || { alert warning "/dev/browser not active (are you running outside of v86?)"; }
@@ -10,7 +11,19 @@ case "$1" in
        ;;
 esac
 
-echo -n "$javascript" > /dev/browser/js
+# below is not ideal
+# first I tried /dev/ttyS* https://github.com/copy/v86/issues/530
+# and differentiate processes by prefixing output by PID's 
+# to parse it later with AWK, but it was very hairy
+
+OUTPUT=/mnt/$PID
+echo -n "PID=$PID; $javascript" > /dev/browser/js
+sleep 0.1
+test -f $OUTPUT && {
+  cat $OUTPUT
+  rm $OUTPUT
+}
+
 
 # should we use flock, an awesome way to make processes read/write the same file
 # while preventing 1001 concurrency issues?

com/isoterminal/mnt/jsh

@@ -25,7 +25,7 @@ to_js(){
 test -z "$1" || {
   func=$(to_js "$@")
   func=${func/,)/)}
-  js "$func"
+  js "return $func"
   hook "$@"
   exit 0
 }
@@ -35,7 +35,7 @@ echo "jsh> type 'exit' or CTRL-C to quit"
 echo "jsh> HINT: to run alert('foo') outside this REPL, run 'jsh alert foo'"
 echo "jsh>"
 while true; do
-  echo -n -e "\r$(printf "\033[0m")jsh> $(printf "\033[0m")"
+  echo -n -e "\n$(printf "\033[0m")jsh> $(printf "\033[0m")"
   read line
   test "$line" = exit && exit
   js "$line"

com/isoterminal/mnt/profile

@@ -8,7 +8,7 @@ source /mnt/profile.xrsh
 source /mnt/profile.sh
 
 # source js functions 
-js "$(cat ~/.profile.js)"
+js "$(cat ~/.profile.js)" &>/dev/null &
 
 ## forward not-found commands to javascript (via jsh)
 command_not_found_handle(){
@@ -16,10 +16,12 @@ command_not_found_handle(){
   echo ""
   echo 'TIPS'
   echo '----'
-  echo 'js console:      ' "type 'jsh'"
-  echo 'js shellfunction:' "type 'alias $1=\"jsh $1\"' to run '$1 yo' as $1('yo')"
-  echo 'js log to tty:   ' "type 'echo 1 > /dev/browser/console.tty' to enable"
-  echo 'js capture log:  ' "type 'tail -f /dev/browser/console'"
+  echo 'js run              ' "type 'js 'alert(\"hello\")'"
+  echo 'js console.log:     ' "type 'console document.baseURI"
+  echo 'js function as cmd: ' "type 'alias $1=\"jsh $1\"' to run '$1 yo' as $1('yo')"
+  echo 'js inspect:         ' "type 'js \"return document.baseURI\"'"
+  echo 'js console disable: ' "type 'echo 0 > /dev/browser/console.tty' to enable"
+  echo 'js capture console: ' "type 'tail -f /dev/browser/console'"
   echo 'jsh<->sh hooks:     ' "type 'chmod +x ~/hook.d/*/* && alert helloworld'"
 }
 

com/isoterminal/mnt/profile.js

@@ -1,3 +1,4 @@
 window.helloworld = function(){
   alert("hello world")
+  return "hello world"
 }

com/isoterminal/mnt/profile.sh

@@ -34,3 +34,11 @@ prompt(){
   echo "$answer"
   hook prompt $1 $answer
 }
+
+console(){
+  js 'return '$1
+}
+
+fetch(){
+  js ''
+}

com/isoterminal/mnt/profile.xrsh

@@ -25,7 +25,7 @@ test -d /dev/browser || {
     # emulator.write_file() only writes to /mnt/. :(
     # should be in /proc, but v86 gives 'no such file or dir' when creating it there
     ln -s /mnt/console.tty /dev/browser/console.tty 
-    echo 0 > /dev/browser/console.tty
+    echo 1 > /dev/browser/console.tty
     touch /mnt/console    && ln -s /mnt/console /dev/browser/console
     touch /mnt/index.html && ln -s /mnt/index.html /dev/browser/index.html
     ln -s /dev/browser/index.html ~/index.html
@@ -38,7 +38,7 @@ test -d /dev/browser || {
     mkdir ~/bin
     mkdir -p ~/hook.d/alert  
     echo -e "#!/bin/sh\necho hook.d/alert/yo: yo \$*"                                   > ~/hook.d/alert/yo 
-    echo -e "#!/bin/js\nalert(\"hook.d/alert/yo.js \"+args.slice(1).join(' '))"         > ~/hook.d/alert/yo.js
+    echo -e "#!/bin/js\nstr = \"hook.d/alert/yo.js yo \"+args.slice(1).join(' ')\nalert(str)\nreturn str" > ~/hook.d/alert/yo.js
     echo -e "#!/usr/bin/env lua\nprint(\"hook.d/alert/yo.lua: yo \" .. arg[1])"         > ~/hook.d/alert/yo.lua
     echo -e "#!/usr/bin/awk -f\nBEGIN{\n\tprint \"hook.d/alert/yo.awk: yo \" ARGV[1]\n}" > ~/hook.d/alert/yo.awk
     echo -e "#!/bin/sh\necho hello \$*"                                                 > ~/bin/hello