open(), ipc and some problems

avaurus has asked for the wisdom of the Perl Monks concerning the following question:

Hi, I am trying to capture the output via the following code:

open(STATUS, "ipconfig |");

    while (<STATUS>) {
          print $_;
    }
    close(STATUS);
[download]

This snippet does work, but if I pass a parameter it will only get "ipconfig":

open(STATUS, "ipconfig bla1 |");

    while (<STATUS>) {
        print $_;
    }
    close(STATUS);
[download]

If I execute that script, only the "ipconfig"-part will be executed. Open takes not care about the rest "bla1". I need to mention that this perl-script runs on windows 2000. It would be very nice, if someone can help. Thank you. Dear avaurus.

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Re: open(), ipc and some problems by northwind (Hermit) on May 11, 2005 at 16:32 UTC
Have you tried the three argument form of `open`? Which in this case would be: `open(STATUS, "-\|", "ipconfig arguments") or die "ACK, GASP: Cannot fork: $! ";`	[reply]
Re^2: open(), ipc and some problems by avaurus (Initiate) on May 12, 2005 at 07:13 UTC
Well, it works :)...Don't know why the other example does not work, but thank you.	[reply]
Re^3: open(), ipc and some problems by northwind (Hermit) on May 12, 2005 at 07:41 UTC
The reason behind this is Windows does not understand the `\|` character on the command line, therefore you need to explicitly declare what are arguments and what is your `open`ing mode. If you need to be even more explicit (and you're running a Perl > 5.6, I think) you could also say: `open(STATUS, "-\|", "ipconfig", "arg_1", "arg_2") or die "ACK, GASP: Cannot fork: $! ";`	[reply]
Re: open(), ipc and some problems by mda2 (Hermit) on May 11, 2005 at 16:54 UTC
I don't understood your "ipconfig bla1", but suposese a simple argument... `open(STATUS, "ipconfig /all \|"); while (<STATUS>) { print $_ if ( /Physical/ ); } close(STATUS); __END__ Physical. . . . : xx-xx-xx ...` [download] If only needs to execute ipconfig with parameters its correct. If need other interacts maybe needs try other open forms. -- Marco Antonio Rio-PM	[reply] [d/l]
Re^2: open(), ipc and some problems by avaurus (Initiate) on May 12, 2005 at 07:15 UTC
hi, ipconfig bla1 was just an example :)...of course "bla1" does not exist. Thank you.	[reply]