Fork: Difference between revisions
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(New page: {{task}} In this task, the goal is to spawn a new process which can run simultaneously with, and independently of, the original parent process. ==Perl== Category:Perl '''Interpr...) |
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'''Interpreter:''' [[Perl]] 5.x |
'''Interpreter:''' [[Perl]] 5.x |
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In the child code, you may have to re-open database handles and such. |
In the child code, you may have to re-open database handles and such. |
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FORK: |
FORK: |
Revision as of 17:33, 6 February 2007
Fork
You are encouraged to solve this task according to the task description, using any language you may know.
You are encouraged to solve this task according to the task description, using any language you may know.
In this task, the goal is to spawn a new process which can run simultaneously with, and independently of, the original parent process.
Perl
Interpreter: Perl 5.x
In the child code, you may have to re-open database handles and such.
FORK: if ($pid = fork()) { # parent code } elsif (defined($pid)) { setsid; # tells apache to let go of this process and let it run solo # disconnect ourselves from input, output, and errors close(STDOUT); close(STDIN); close(STDERR); # re-open to /dev/null to prevent irrelevant warn messages. open(STDOUT, '>/dev/null'); open(STDIN, '>/dev/null'); open(STDERR, '>>/home/virtual/logs/err.log'); # child code exit; # important to exit } elsif($! =~ /emporar/){ warn '[' . localtime() . "] Failed to Fork - Will try again in 10 seconds.\n"; sleep(10); goto FORK; } else { warn '[' . localtime() . "] Unable to fork - $!"; exit(0); }