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Re: Obtaining the output of a system call, not the return status

by wog (Curate)
on Feb 09, 2002 at 21:58 UTC ( #144406=note: print w/replies, xml ) Need Help??

in reply to Obtaining the output of a system call, not the return status

You probably want to use backticks AKA qx:
my $html = `echo $plaintext | txt2html --extract`; # -- or -- my $html = qx(echo $plaintext | txt2html --extract); # where the ()s can be any seperator you can use on qw(), etc.
However, you might find it better to do this sort of thing with IPC::Open2, especially if $plaintext is going to contain stuff that you don't want to pass to the shell:
use IPC::Open2; my($read_fh,$write_fh); my $pid = open2($read_fh,$write_fh,"txt2html","--extract"); print $write_fh $plaintext; close $write_fh; my $html = do { local $/; <$read_fh> }; # or you can use a while(<$read_fh>) { ... } loop. waitpid $pid, 0; # don't leave "zombies"

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[sierpinski]: Haha
[Discipulus]: i'm with you!
[Discipulus]: with eskimo greeting is a little bit impressing, anyway
[Eily]: I actually used the eskimo greeting :P, I just wrote the "canonical" form of the oneliner here
[Discipulus]: next time you can add `SARGV-1` and if still not impressed pass a 'rm -f..' as last arg
[Eily]: :)

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