16 lines
866 B
Text
16 lines
866 B
Text
In Perl 5.8.0 the so-called "safe signals" were introduced. This means that Perl
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no longer handles signals immediately but instead "between opcodes", when it is
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safe to do so. The earlier immediate handling easily could corrupt the internal
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state of Perl, resulting in mysterious crashes.
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It's possible since perl 5.8.1 to globally disable this feature by using the
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PERL_SIGNALS environment variables (as specified in "PERL_SIGNALS" in perlrun);
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but there's no way to disable it locally, for a short period of time. That's
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however something you might want to do, if, for example, your Perl program calls
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a C routine that will potentially run for a long time and for which you want to
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set a timeout.
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This module therefore allows you to define UNSAFE_SIGNALS blocks in which
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signals will be handled "unsafely".
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WWW: http://search.cpan.org/dist/Perl-Unsafe-Signals/
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