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Re^4: Running external command from perl but cannot capture output

by mantadin (Beadle)
on Apr 25, 2006 at 05:44 UTC ( #545478=note: print w/replies, xml ) Need Help??


in reply to Re^3: Running external command from perl but cannot capture output
in thread Running external command from perl but cannot capture output

In
@test=`mac \"$_\" -v >/dev/null 2>&1`;
stdout is directed to /dev/null, and then, stderr is directed to where stdout points to. So this one should work:
@test=`mac \"$_\" -v 2>&1`;
BTW, to check the exit status instead of capturing the output, you can use system() instead of `` or qx//

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[hippo]: Can anybody suggest a scalar value of $x for which ($x && !length $x) is true?
[Corion]: hippo: If you have a Unicode-wise Perl then likely some zero-width characters in $x would work. Maybe $x = "\x{200b}" works.
[Corion]: Hmm - no, that outputs 1 for me on 5.14 - perl -wle "my $x = qq(\x{200b}); warn $x; warn length $x"
[hippo]: Smart - I'll give that a go. Thanks.

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