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=encoding utf8 =head1 NAME POSIX::SigAction - represent a struct sigaction =head1 SYNOPSIS $sigset = POSIX::SigSet->new(SIGINT, SIGQUIT); $sigaction = POSIX::SigAction ->new(\&handler, $sigset, SA_NOCLDSTOP); $sigset = $sigaction->mask; $sigaction->flags(SA_RESTART); $sigaction->safe(1); =head1 DESCRIPTION The C<POSIX::SigAction> object corresponds to the C C<struct sigaction>, defined by C<signal.h>. This module is a bit tricky: POSIX.pm contains the same code for the C<POSIX::SigAction> namespace. However, we do not need POSIX.pm but only the POSIX.xs component which has the namespace hard-coded. =head1 METHODS =head2 Constructors =over 4 =item POSIX::SigAction-E<gt>B<new>( $handler, [$sigset, [$flags]] ) The first parameter is the handler, a code reference. The second parameter is a L<POSIX::SigSet|POSIX::SigSet> object, it defaults to the empty set. The third parameter contains the C<sa_flags>, it defaults to 0. This object will be destroyed automatically when it is no longer needed. =back =head2 Accessors =over 4 =item $obj-E<gt>B<flags>() Accessor functions to get/set the values of a SigAction object. =item $obj-E<gt>B<handler>() =item $obj-E<gt>B<mask>() =item $obj-E<gt>B<safe>() Accessor function for the "safe signals" flag of a SigAction object; see L<perlipc> for general information on safe (a.k.a. "deferred") signals. If you wish to handle a signal safely, use this accessor to set the "safe" flag in the C<POSIX::SigAction> object: $sigaction->safe(1); You may also examine the "safe" flag on the output action object which is filled in when given as the third parameter to L<POSIX::1003::Signals::sigaction()|POSIX::1003::Signals/"Standard POSIX">: sigaction(SIGINT, $new_action, $old_action); if ($old_action->safe) { # previous SIGINT handler used safe signals } =back =head1 SEE ALSO This module is part of POSIX-1003 distribution version 1.02, built on November 10, 2020. Website: F<http://perl.overmeer.net/CPAN>. The code is based on L<POSIX>, which is released with Perl itself. See also L<POSIX::Util> for additional functionality. =head1 COPYRIGHTS Copyrights 2011-2020 on the perl code and the related documentation by [Mark Overmeer]. For other contributors see ChangeLog. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See F<http://dev.perl.org/licenses/>
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