POSIX Tools

This is a probably misguided attempt to re-create a few of the simpler standard shell tools and utilities from scratch, mainly as a practice exercise in C and *nix programming. I'm aiming for compliance with the shell & utilities section of POSIX.1-2008.

If it's not immediately obvious I don't really know what I'm doing, so don't go relying on these unless you want your machine to go up in a puff of blue smoke.

Complete implementations

• basename
• cat
• dirname
• echo
• env
• false
• head
• pwd
• rm
• tail
• true
• wc

Partial implementations

• cal - Only handles Gregorian calendar dates correctly (14th Sep 1752 onwards)
• ls - Does basic listings, but most of the formatting and options are still to be done

Prior art

Some other implementations you might be familiar with:

• https://gist.github.com/dchest/1091803
• http://www.opensource.apple.com/source/shell_cmds/shell_cmds-170/
• http://git.savannah.gnu.org/cgit/coreutils.git/tree/src
• http://plan9.bell-labs.com/sources/plan9/sys/src/cmd/