The current implementation of open requires the user to pass all three
args to the function. It should use a va_list and allow a user to
provide only the filename and flags.

No tests written yet! See #36

Wrote tests for the functions implemented in 40558b26 and maybe made that
test a little more comprehensible.

Also made sure that fmt.sh and test.sh were being executed by bash all
the time (compatibility with other shells).

Create the wctype crate and stub functions with the unimplemented macro.

Add ctype functions
  - isalnum
  - isalpha
  - isascii
  - isdigit
  - islower
  - isspace
  - isupper
Add stdlib functions
  - atoi
  - atol
Fix some warnings
Make a fmt run

Update platform support for linux to avoid the use of syscalls not
supported by Aarch64.
  - link, chown, and open should use fchownat and linkat with fd
    set to AT_FDCWD.
  - use dup3 with the 3rd arg set to 0 instead of dup2.

Add cargo fmt script

 - Add a rustfmt config
 - Get the current code passing the formatter

Dan Robertson authored 7 years ago and Dan Robertson committed 7 years ago

 - Add cfg to extern crate sc. It is not used by redox.
 - Fix bad syntax in brk implementation for redox
 - nits
   - style: update brk implementation for linux
   - style: no space between not operator and ptr.is_null
   - style: should be a space around = in module path