working directory tracking

closes #1

bin/init.py

@@ -7,7 +7,7 @@ def get_app_class(template):
                 lines = f.readlines()
             for line in lines:
                 if line.strip():
-                    last_pid = self.os.launch(*shlex.split(line))
+                    last_pid = self.launch(*shlex.split(line))
 
             self.transfer_console(last_pid)
             self.next_function = 'loop'

bin/ls.py

@@ -1,4 +1,5 @@
 import os
+import console
 
 def get_app_class(template):
     class App(template):
@@ -10,13 +11,13 @@ def get_app_class(template):
 
             try:
                 for file in os.listdir(path):
-                    self.console.write(file)
+                    console.write_str(self.console, file + "\n")
             except OSError as e:
                 try:
                     os.stat(path)
-                    self.console.write(path)
+                    console.write_str(self.console, path + "\n")
                 except OSError:
-                    self.console.write(f"ls: cannot access '{path}': No such file or directory")
+                    console.write_str(self.console, f"ls: cannot access '{path}': No such file or directory\n")
 
             self.exit()
 

bin/ps.py

@@ -1,3 +1,5 @@
+import console
+
 def get_app_class(template):
     class App(template):
         def F_main(self):
@@ -5,7 +7,7 @@ def get_app_class(template):
             for pid, app in apps.items():
                 args = app.argv[1:]
                 name = app.name
-                self.console.write(f'{pid}	{name} {args}')
+                console.write_str(self.console, f'{pid}	{name} {args}\n')
             self.exit()
 
     return App

bin/pwd.py

@@ -0,0 +1,10 @@
+import os
+import console
+
+def get_app_class(template):
+    class App(template):
+        def F_main(self):
+            console.write_str(self.console, os.getcwd() + "\n")
+            self.exit()
+
+    return App

bin/sh.py

@@ -19,11 +19,13 @@ def get_app_class(template):
                 if line:
                     try:
                         if line[0] == 'bg':
-                            self.os.launch(*line[1:])
+                            self.launch(*line[1:])
+                        elif line[0] == 'cd':
+                            self.chdir(line[1])
                         elif line[0] == 'exit':
                             self.exit()
                         else:
-                            pid = self.os.launch(*line)
+                            pid = self.launch(*line)
                             self.wait(pid)
                             self.transfer_console(pid)
                     except fibonaccios.exceptions.AppNotFound as e:

fibonaccios/__init__.py

@@ -5,19 +5,22 @@ from fibonaccios.apploader import get_app
 import fibonaccios.apploader # apploader hack
 import time
 import usb_cdc
+import os
 
 class App:
-    def __init__(self, os, pid, name, *argv):
+    def __init__(self, os, pid, name, wd, *argv):
         self.os = os
         self.pid = pid
         self.name = name
         self.store = {}
         self.next_function = 'main'
         self.run_at = -1
+        self.wd = wd
         self.argv = (self,) + argv
         self.waiting_for = -1
 
     def iterate(self):
+        os.chdir(self.wd)
         if time.monotonic() >= self.run_at and not self.waiting_for in self.os.apps:
             getattr(self, f'F_{self.next_function}')()
 
@@ -34,6 +37,10 @@ class App:
         else:
             raise NotConsoleController(self.os.controllers[-1])
 
+    def chdir(self, wd):
+        os.chdir(wd)
+        self.wd = os.getcwd()
+
     def jump(self, function):
         self.next_function = function
 
@@ -41,7 +48,10 @@ class App:
         self.run_at = time.monotonic() + seconds
 
     def exec(self, command, *argv):
-        self.os.apps[self.pid] = get_app(command)(self.os, self.pid, command, *argv)
+        self.os.apps[self.pid] = get_app(command)(self.os, self.pid, command, self.wd, *argv)
+
+    def launch(self, command, *argv):
+        return self.os.launch(command, self.wd, *argv)
 
     def wait(self, pid):
         self.waiting_for = pid
@@ -65,7 +75,7 @@ class OS:
         self.console = usb_cdc.console
         usb_cdc.console.timeout = 0
         self.next_pidi = 0
-        self.launch('init')
+        self.launch('init', '/')
 
     def iterate(self):
         pid = list(self.apps.keys())[self.next_pidi]
@@ -87,8 +97,8 @@ class OS:
         while not self.controllers[-1] in self.apps.keys():
             self.controllers.pop()
 
-    def launch(self, app, *argv):
+    def launch(self, app, wd, *argv):
-        self.apps[self.next_new] = get_app(app)(self, self.next_new, app, *argv)
+        self.apps[self.next_new] = get_app(app)(self, self.next_new, app, wd, *argv)
         self.next_new += 1
         return self.next_new - 1
 

lib/console.py

@@ -15,3 +15,7 @@ def read(console, buffer):
         buffer.append(char)
     else:
         return None
+
+
+def write_str(console, string, encoding="utf-8"):
+    console.write(string.encode(encoding))