'os' types/functions (exec, etc.)

[cadebrown]

There are a number of 'os' types/functions that need to be wrapped, specifically:

• os.exec(cmd): Executes a command, which can either be a str (which should be split), or a list of string arguments to execute (i.e. will be argv). This may wrap multiple functions from the exec* functionality in C. Possible variations include: allow opening processes to be captured (i.e. stdin, stdout, and stderr)
• os.stat (or os.path.stat) type, which should be platform agnostic (so no '.st_*' members, try and wrap them in a responsible manner)
• Permission-based functions (access, chown, chmod, etc). Try and combine functionality wherever possible (i.e. reduce redundant functions)
• os.path niceties, such as common prefix, basename, dirname, extension grabbing, and so forth

[gcrois]

Rudimentary exec function implemented in commits 6085d43 and 303bd8c

[gcrois]

Fully implemented the proc type in commits ee8ebe3 and ea33b6f, allowing for easy redirection of a process. Needs stability testing and bug fixing!