Programming

I’m trying to work off of someone else code they gave me as an example but they are gone! I’m trying to pretty much write a wrapper of several different scripts.
They use argv[1]…I keep on thinking the next one should be argv[2] ect. I’m not sure if maybe its different in PERL maybe if that’s true? Or maybe the command lines are mutually exclusive? Then in my perl script a lot of my options are optional. I couldn’t do an if statement b/c I’m not sure which ones will be called! I almost need to append to the command file if they are selected. But I don’t think doing something like

Code:

$perl >> -lnf $lnf  would work? Do u have any idea?

set arg=$argv[1]
  shift argv
  switch ($arg)
   case "-alf":
      set dir = `echo "$argv[1]"`
    breaksw
    case "-cell":
      set cell = `echo "$argv[1]"`
      set perl = ${WARD}/bin/lnf2alf.pl -cell $cell
    breaksw
    case "-o":
      set out = `echo "$argv[1]"`
      $perl >> -o $out
    breaksw
    case "-lnf":
      set lnf = `echo "$argv[1]"`
      $perl >> -lnf $lnf
    breaksw
      case -h:
   case --help:
    default:
    goto help
    breaksw
  endsw
  shift argv
end

${WARD}/bin/lnf2alf.pl -cell $cell

The trick is shift argv This pops the first element off the array, like:

Code:

# before shift
[ bog, flar, narm, fleeb ]
# after shift
[ flar, narm, fleeb ]

...so he can just keep using argv[1].

Perl has shift too. So do most shell languages actually.

hey thanks! I'm not to familar with c shell was pretty much using google as a resource. Someone just told me it is like unix but it is in a script. Not many I people I work with have used C shell. I'm trying to write a wrapper. My user has several optional inputs..is there a shorter way to do what I need to do w/o lots of if statements?
so I have a perl file I will execute..but lots of optional user inputs. So..
$file.pl -out <file> -in <file> -dir <path> -dir2 <path2>
so I'd have several different combinations my script could be!
I could do it with several if statments but is there an easier way? I know you can append to a input of a file with <<..is there something like that? sorry for the maybe dumb question.

I have no idea what they were even trying to say. The C-shell was made in imitation of C but they didn't really succeed.

The C-shell isn't liked very much because of it's many limitations, problems, and general strangeness(see Csh Programming Considered Harmful for only some of the reasons we want to discourage its use), and many systems I've dealt with didn't even have it by default. Most folks I notice asking questions on it here only do so because they're forced to do so. If you want to learn a real shell that'll actually work on a lot of systems, check out some variety of Bourne or Korn shell. Not surprising. In what? For what?

Yeah if I didn't have to write in c shell I wouldn't! my boss is requireing it. I don't have much say in the matter. That is how they do all there scripts. Its a wrapper that calls a tcl & perl script. lol..general strangeness.

Usually you'd parse arguments one by one and use a big case statement for switches, maybe aided by the getopt utility.