perlquestion
Random_Walk
<p>Oh Brothers and Sisters in perl I beg the fruits of your wisdom.<br><BR>
I have a simple script I am using to get the hang of [IPC::open3]. When I do the open I wrap it in an eval and die if it failed. The die however does not happen until after the rest of the script is done.
</p>
<code>
#!/usr/bin/perl
use strict;
use warnings;
use IPC::Open3;
my($in, $out, $err, $pid);
open( $out, ">&STDOUT" ) or
die "Can't dup STDOUT to OUTPUT: $!\n";
open( $err, ">&STDERR" ) or
die "Can't dup STDERR to OUTERR: $!\n";
eval { $pid = open3($in, $out, $err, @ARGV) };
die "open3 gave trouble: $@\n" if $@;
print "It is running\n";
close $in;
print "stdout:\n";
print while <$out>;
close $out;
print "stderr:\n";
print while <$err>;
close $err;
__END__
# this is expected
./open3 echo "Hello World"
It is running
stdout:
Hello World
stderr:
# this is confusing the proverbial out of me
./open3 nosuchcommand
It is running
stdout:
stderr:
open3 gave trouble: open3: exec of nosuchcommand failed at ./open3 line 15
# The die obviosly ran but the code did not die,
# ran to completion regardless then printed the error
</code>
<p>Cheers,<br>R.</p>
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Pereant, qui ante nos nostra dixerunt!
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