first working customized iso version =]

README.md

@@ -13,7 +13,18 @@ Following the [Buildroot customization docs](https://buildroot.org/downloads/man
 we create a folder `buildroot-v86/` with all the necessary config files,
 filesystem overlay, and scripts necessary to build our distribution.
 
-## Running via Docker
+## Running ISO via qemu 
+
+```
+qemu-system-i386 -cdrom dist/v86-linux.iso
+```
+
+or with nix:
+```
+nix-shell -p qemu --run 'qemu-system-i386 -cdrom dist/v86-linux.iso'
+```
+
+## Building via Docker
 
 To build the Docker image use the `build.sh` script, or:
 

buildroot-v86/board/v86/rootfs_overlay/bin/js

@@ -0,0 +1,33 @@
+#!/bin/sh
+PID=$$
+test -z "$1" && { echo "Usage: js 'somefunction(1)'"; exit 0; }
+
+source /etc/profile.sh
+
+test -n "$BROWSER" || { alert warning "/dev/browser not active (are you running outside of v86?)"; }
+javascript="$*"
+
+# if we are run as shebang, use the file as input
+test -f "$1" && {
+  javascript="args = String('$*').split(' '); $(cat $1 | tail +2)"
+}
+
+# below is not ideal
+# first I tried /dev/ttyS* https://github.com/copy/v86/issues/530
+# and differentiate processes by prefixing output by PID's 
+# to parse it later with AWK, but it was very hairy
+
+OUTPUT=/mnt/$PID
+echo -n "PID=$PID; $javascript" > /dev/browser/js
+sleep 0.1
+test -f $OUTPUT && {
+  cat $OUTPUT
+  rm $OUTPUT
+}
+
+
+# should we use flock, an awesome way to make processes read/write the same file
+# while preventing 1001 concurrency issues?
+# attempt:
+#
+# flock /dev/browser/js -c "echo \"$javascript\" > /dev/browser/js"

buildroot-v86/board/v86/rootfs_overlay/bin/jsh

@@ -0,0 +1,45 @@
+#!/bin/sh
+# usage: jsh <function> [arg1] [arg2] ...
+#         
+# 'jsh prompt question answer' executes: js prompt('question','answer') )
+
+source /etc/profile.sh
+
+to_js(){
+  printf "%s(" "$1"
+  shift
+  for arg in "$@"; do
+    case "$arg" in
+      (*[\.0-9]*) 
+        printf '%s,' "$arg"
+        ;;
+      (*)
+	printf '"%s",' "$arg"
+        ;;
+    esac
+  done
+  printf ")\n"
+}
+
+# run argument as js
+test -z "$1" || {
+  func=$(to_js "$@")
+  func=${func/,)/)}
+  js "return $func"
+  hook "$@"
+  exit 0
+}
+
+# otherwise start repl
+echo "jsh> JavaScript [browser] runtime"
+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 "\n$(printf "\033[0m")jsh> $(printf "\033[0m")"
+  read line
+  test "$line" = exit && exit
+  js "$line"
+done
+
+

buildroot-v86/board/v86/rootfs_overlay/bin/v86pipe

@@ -0,0 +1,30 @@
+#!/bin/sh
+#
+# this daemon allows 'tail -f' on v86 files (which don't persist inode when updated
+# via javascript)
+# more info see: https://github.com/copy/v86/issues/1140
+#
+# Hopefully as V86 (or my understanding of it) matures, this will be no longer needed
+
+test -z $2 && { echo "usage: v86pipe <logfile> <namedpipe>"; exit 0; }
+
+# Start reading from the last line in the log file
+last_size=0
+LOG_FILE=$1
+LOG_PIPE=$2
+
+test -f $LOG_FILE || touch $LOG_FILE
+test -p $LOG_PIPE || mkfifo $LOG_PIPE
+
+while true; do
+    # Get the current size of the file using wc -c (count bytes)
+    current_size=$(wc -c < $LOG_FILE)
+    test $current_size = $last_size || {
+      cat $LOG_FILE > $LOG_PIPE
+      truncate -s 0 $LOG_FILE
+    }
+    last_size=$current_size
+
+    # Sleep for a moment to avoid excessive CPU usage
+    sleep 0.2
+done

buildroot-v86/board/v86/rootfs_overlay/etc/profile

@@ -1,5 +1,8 @@
+export HOME=/root 
+export PATH=$PATH:/etc:~/bin
+
 # source URL data from v86 (file created by v86 during boot)
-test -f /etc/profile.browser && source /etc/profile.browser
+test -f /mnt/profile.browser && source /mnt/profile.browser
 
 # source xrsh env
 source /etc/profile.xrsh
@@ -8,7 +11,7 @@ source /etc/profile.xrsh
 source /etc/profile.sh
 
 # source js functions 
-./.profile.js
+./.profile.js | grep -v undefined
 
 ## forward not-found commands to javascript (via jsh)
 command_not_found_handle(){
@@ -25,7 +28,7 @@ help(){
   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 console mute:      ' "type 'echo 0 > /dev/browser/tty' to disable"
   echo 'js capture console:   ' "type 'tail -f /dev/browser/console'"
   echo 'jsh<->sh hooks:       ' "type 'chmod +x ~/hook.d/*/* && alert helloworld'"
   echo 'include file into page' "type 'require <url.js|css>'"
@@ -35,11 +38,14 @@ help(){
   ONBOARDING=1
 }
 
-resize
-test $HOSTNAME = localhost || clear
-cat /etc/motd
-export PATH=$PATH:/etc:~/bin
 export TERM=xterm-256color
 export PS1="\n\[\033[38;5;57m\]x\[\033[38;5;93m\]r\[\033[38;5;129m\]s\[\033[38;5;165m\]h \[\033[38;5;201m\]# \[\033[0m\]"
 
-pidof screen || screen -T screen-256color -c /root/.screenrc
+# interactive login
+[[ -t 0 ]] && {
+  cat /etc/motd
+  test -n "$STY" || {
+    screen -R -T screen-256color -c /root/.screenrc
+  }
+}
+

buildroot-v86/board/v86/rootfs_overlay/etc/profile.xrsh

@@ -2,49 +2,24 @@
 
 test -d /dev/browser || {
 
-  setup_binaries(){
-    for bin in /mnt/js* /mnt/v86pipe /mnt/xrsh; do 
-      chmod +x $bin
-      ln -s $bin /bin/.
-    done
-  }
-
   setup_links(){
-    ln -s /mnt/profile ~/.profile
-    ln -s /mnt/profile.js ~/.profile.js
-    ln -s /mnt/profile.browser ~/.profile.browser
-    ln -s /mnt/profile.sh ~/.profile.sh
-    ln -s /mnt/motd ~/.motd 
-    ln -s ~/.profile.js ~/index.js
+    ln -fs /etc/profile ~/.profile
+    ln -fs /etc/profile.js ~/.profile.js
+    ln -fs /etc/profile.sh ~/.profile.sh
+    ln -fs /etc/motd ~/.motd 
+    ln -fs /mnt/profile.browser ~/.profile.browser
+    ln -fs ~/.profile.js ~/index.js
+    ln -fs /dev/browser/index.html ~/index.html
     chmod +x ~/.profile.js
   }
 
   setup_browser_dev(){
-    mkdir -p /mnt/dev/browser
-    touch /mnt/dev/browser/js
-    touch /mnt/console.tty
-    ln -s /mnt/dev/browser /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 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
-
-    test -f /etc/profile && rm /etc/profile
-    ln -s /mnt/profile /etc/profile
-  }
-
-  setup_hook_dirs(){ # see /mnt/hook for usage
-    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\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 
-    chmod +x ~/bin/hello
+    mkdir -p /dev/browser 
+    echo 1 > /mnt/console.tty
+    ln -s /mnt/console.tty /dev/browser/tty
+    ln -fs /mnt/js /dev/browser/js
+    touch /dev/browser/console
+    touch /dev/browser/index.html
   }
 
   setup_network(){
@@ -54,10 +29,13 @@ test -d /dev/browser || {
     echo 0 > /proc/sys/kernel/printk
   }
 
-  setup_binaries
+  setup_overlayfs(){
+    test -f /mnt/overlayfs.zip && unzip /mnt/overlayfs.zip -d /
+  }
+
   setup_browser_dev
-  setup_hook_dirs
   setup_links
   setup_network
+  setup_overlayfs
 
 }

buildroot-v86/board/v86/rootfs_overlay/root/.screenrc

@@ -1,14 +1,11 @@
 # look and feel
-#caption always "%{i0}^{=}" #"%{= bb}%n%{+b w}%t %{= db} ${USER}@xrsh.iso"
-#hardstatus alwayslastline "%-Lw%{= BW} %{=B}%t%{-B} %{-}%+Lw%<"
-#caption always "%{= bb}%{+b w}%n %t %h %=%l %H %c"
-hardstatus alwayslastline "%{= Bb}%-Lw%{= BW}%50> %t %{-}<"
+caption always "%{= kw}%-w%{= BW} %t %{-}%+w %-= $HOSTNAME"
 
 # skip the startup message
 startup_message off
 
 # go to home dir
-chdir
+chdir /root
 
 # Automatically detach on hangup. 
 autodetach on
@@ -37,7 +34,8 @@ defbce on    # use current bg color for erased chars
 
 # setup windows
 screen -t jsconsole  0 tail -f /dev/browser/console 
-screen -t xrsh       1 
-If you want it to start with a particular window active, you can add a line like the following:
+screen -t jsh        1 jsh
+screen -t xrsh       2
 
-select 1
+##If you want it to start with a particular window active, you can add a line like the following:
+#select 1

buildroot-v86/board/v86/rootfs_overlay/root/bin/helloworld

@@ -0,0 +1,3 @@
+#!/bin/js
+alert("~/bin/helloworld")
+return done: ~/bin/helloworld

buildroot-v86/board/v86/rootfs_overlay/root/hook.d/alert/yo

@@ -0,0 +1,2 @@
+#!/bin/sh
+echo hook.d/alert/yo: yo $*

buildroot-v86/board/v86/rootfs_overlay/root/hook.d/alert/yo.awk

@@ -0,0 +1,4 @@
+#!/usr/bin/awk -f
+BEGIN{
+  print "hook.d/alert/yo.awk: yo " ARGV[1]
+}

buildroot-v86/board/v86/rootfs_overlay/root/hook.d/alert/yo.js

@@ -0,0 +1,3 @@
+#!/bin/js 
+str = "hook.d/alert/yo.js yo"+args.slice(1).join(' ')
+alert(str)

buildroot-v86/board/v86/rootfs_overlay/root/hook.d/alert/yo.lua

@@ -0,0 +1,2 @@
+#!/usr/bin/env lua
+print("hook.d/alert/yo.lua: yo " .. args[1])

buildroot-v86/board/v86/rootfs_overlay/root/hook.d/alert/yo.py

@@ -0,0 +1,3 @@
+#!/usr/bin/env micropython
+import sys
+print("hook.d/alert/yo.py: "+sys.argv[1])

xrsh.iso

@@ -0,0 +1 @@
+dist/v86-linux.iso