Reference notes for Inferno's sh(1)

General

See: http://man.postnix.pw/purgatorio/1/sh

Various files in /lib/sh

Source in: /appl/cmd/sh/

Loadable modules at time of writing:

• arg for commandline argument parsing
• csv for CSV document parsing
• echo which seems to just provide echo(1)
• expr for arithmetic
• file2chan which provides a shell interface for file2chan(2)
• mload which allows aliasing of modules loaded to avoid module namespace clashes
• mpexpr same as expr except mpexpr uses arbitrary-precision integers
• regex for regular expressions
• sexprs for S-expressions
• std for standard shell functionality (if, for, etc.)
• string for string manipulation
• test provides error reporting for itest(1) testing facilities
• tk as an interface to Tk graphical operations

std

or lets you try several commands in order, stopping when one succeeds:

or {first} {second} ...

You can do a compound if without else:

if{~ some $thing}{
	do something
}{~ another $thing}{
	do anotherthing
}{
	other wise
}