Re: Understanding how to fork properly.

you might want to try setting $| to some non-zero value. $| causes a buffer flush after every print statement (i think it works for write, too, consult the camel.)

most people write $|++;, but i prefer explicitly setting $|=1;. that way if some bonehead set it to -1 previously, the increment op wouldn't be doing the wrong thing.

oh, and this works by default on STDOUT. you'll have to specify autoflush on other filehandles by selecting them first, or by calling the autoflush method on the filehandle, something like $FH->autoflush();

~Particle

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Re: Re: Understanding how to fork properly.
by dvergin (Monsignor) on Jan 31, 2002 at 04:07 UTC

if some bonehead set it to -1 previously, the increment op wouldn't be doing the wrong thing.

Oops! No. $| is magic. It always equals either zero or one. Nothing else. Behold:

print "$|\n";      # 0

$| = -1;
print "$|\n";      # 1

$|++;
print "$|\n";      # 1

$|++;
print "$|\n";      # 1

$|--;
print "$|\n";      # 0

$|--;
print "$|\n";      # 1

$|--;
print "$|\n";      # 0
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------------------------------------------------------------
"Perl is a mess and that's good because the
problem space is also a mess." - Larry Wall

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(crazyinsomniac) Re^2: Understanding how to fork properly.
by crazyinsomniac (Prior) on Jan 31, 2002 at 04:34 UTC

...i think it works for write, too, consult the camel.)

I can't but wonder *why* do monks give such costly advice. The answer *is* ALWAYS, consult perldoc (or perlman, whatever you like to call it ... perlfunc,perlvar,perlio... one of those)

______crazyinsomniac_____________________________
Of all the things I've lost, I miss my mind the most.
perl -e "$q=$_;map({chr unpack qq;H*;,$_}split(q;;,q*H*));print;$q/$q;"

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Re: (crazyinsomniac) Re^2: Understanding how to fork properly.

by chromatic (Archbishop) on Jan 31, 2002 at 05:55 UTC

The Camel is a much more effective and satisfying LART than a hard drive, a monitor, or the full-sized server. Hey, if I've spent five minutes reeducating the guy, I don't want him to lose it with a concussion!

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Re: (crazyinsomniac) Re^2: Understanding how to fork properly.

by particle (Vicar) on Jan 31, 2002 at 14:06 UTC

i also prefer the index as search tool. maybe if there were good indexes online, not tables of contents and search tools, i'd look online more.

i always travel with the camel. my copy is pretty beaten up, as it's seen thirty states in the past year alone. i suppose you could call it my perl security blanket :)

~Particle

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