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STDIN STDOUT?
Posted on 2000-02-17
According to a "teach yourself Perl" book I've got here, I can reset STDOUT to the default (ie. normal STDOUT) by doing this :
open(STDOUT,">-");
However, if I do this :
print "Hello1\n";
open(STDOUT,">/dev/null");
print "Hello2\n";
open(STDOUT,">-");
print "Hello3\n";
I'd expect to see :
Hello1
Hello3
however all I see is :
Hello1
I need to system() a process which refuses to run quietly (even with direction to /dev/null) so I want Perl to turn off stdout temporarily, but then I need it back....hayelp!
open(STDOUT,">-");
However, if I do this :
print "Hello1\n";
open(STDOUT,">/dev/null");
print "Hello2\n";
open(STDOUT,">-");
print "Hello3\n";
I'd expect to see :
Hello1
Hello3
however all I see is :
Hello1
I need to system() a process which refuses to run quietly (even with direction to /dev/null) so I want Perl to turn off stdout temporarily, but then I need it back....hayelp!
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2 Comments
try this. it works
#!/usr/local/bin/perl
open(STDOUT,">-");
print "Hello1\n";
close(STDOUT);
open(STDOUT,">/dev/null");
print "Hello2\n";
close(STDOUT);
open(STDOUT,">-");
print "Hello3\n";
close(STDOUT);
#!/usr/local/bin/perl
open(STDOUT,">-");
print "Hello1\n";
close(STDOUT);
open(STDOUT,">/dev/null");
print "Hello2\n";
close(STDOUT);
open(STDOUT,">-");
print "Hello3\n";
close(STDOUT);
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