On Mon, 2009-05-25 at 17:45 +0200, Patai Gergely wrote:
There getArgs and getProgName in System module. If you want parse this parameters there is System.Console.GetOpt. Those will only tell me how my program was called. I want to work with command lines as data within my program, which is a completely different thing.
All the splitting, escaping and quotes interpretaion is done by shell. All what get program when starts is list of strings. Program name is actually arbitrary string. (At least on unices, it may work a bit differently on windows).
That's fine, but I'll see the commands yet to be passed to the shell as strings, and I'd like to know where to split them.
Trying to accurately emulate how the shell expands a command line string into program argument strings is not easy. I don't know of any existing Haskell library to do this but POSIX specifies a C function wordexp() which does shell command line expansion. This might be more than you want however as it also expands *.hs wildcards, arithmetic, quote removal, ~user paths, $env vars and (optionally) $(command) substitution. Duncan