OctOS: Add touch, rm, and cp commands

Documented in `commands.md`

doc/computers/commands.md

@@ -8,4 +8,13 @@ Shows help about the command specified or all commands if `all` is specified.
 Runs Lua code from the command line under the secure environment.
 
 #### `echo [text]`
-Print text to the command line.
+Print text to the command line.
+
+#### `touch [path]`
+Create new file.
+
+#### `rm [path]`
+Remove file.
+
+#### `cp [old path] [new path]`
+Make a copy of a file.

octos/bin/cp

@@ -0,0 +1,4 @@
+name = cp
+description = Copy file
+params = [original path] [copy path]
+exec = os/exec/cp.lua

octos/bin/rm

@@ -0,0 +1,4 @@
+name = rm
+description = Remove file
+params = [path]
+exec = os/exec/rm.lua

octos/bin/touch

@@ -0,0 +1,4 @@
+name = touch
+description = Create a file
+params = [path]
+exec = os/exec/touch.lua

octos/exec/cp.lua

@@ -0,0 +1,21 @@
+local path = ...
+local old  = path[1]
+local new  = path[2]
+
+if old and new then
+  if fs.exists(old) then
+    if not fs.exists(new) then
+      if fs.copy(old, new) then
+        print("Copied "..old.." to "..new)
+      else
+        print(old.." is a directory")
+      end
+    else
+      print(new.." already exists")
+    end
+  else
+    print(old.." does not exist")
+  end
+else
+  print("Must specify original and new path (see help cp)")
+end

octos/exec/rm.lua

@@ -0,0 +1,16 @@
+local path = ...
+path = path[1]
+
+if path then
+  if fs.exists(path) then
+    if fs.remove(path) then
+      print("Removed file "..path)
+    else
+      print(path.." is a directory")
+    end
+  else
+    print(path.." does not exist")
+  end
+else
+  print("Must specify path (see help rm)")
+end

octos/exec/touch.lua

@@ -0,0 +1,16 @@
+local path = ...
+path = path[1]
+
+if path then
+  if not fs.exists(path) then
+    if fs.create(path) then
+      print("Created file "..path)
+    else
+      print("Could not create file "..path)
+    end
+  else
+    print(path.." already exists")
+  end
+else
+  print("Must specify path (see help touch)")
+end