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=encoding utf8 =head1 NAME POSIX::1003::Limit - POSIX access to ulimit and rlimit =head1 SYNOPSIS # ULIMIT support use POSIX::1003::Limit; # load all names use POSIX::1003::Limit qw(ulimit); # keys are strings! $size = ulimit('UL_GETFSIZE'); use POSIX::1003::Limit qw(ulimit UL_GETFSIZE); $size = UL_GETFSIZE; # constants are subs use POSIX::1003::Limit '%ulimit'; my $key = $ulimit{UL_GETFSIZE}; $ulimit{_SC_NEW_KEY} = $key_code; $size = ulimit($key); print "$_\n" for keys %ulimit; # RLIMIT support use POSIX::1003::Limit ':rlimit'; my ($cur, $max, $success) = getrlimit('RLIMIT_CORE'); my ($cur, $max) = getrlimit('RLIMIT_CORE'); my $cur = RLIMIT_CORE; my $success = setrlimit('RLIMIT_CORE', 1e6, 1e8); setrlimit('RLIMIT_CORE', 1e6) or die; setrlimit('RLIMIT_CORE', RLIM_SAVED_MAX, RLIM_INFINITY); RLIMIT_CORE(1e6, 1e8); =head1 DESCRIPTION This module provides access to the "ulimit" (user limit) and "rlimit" (resource limit) handling. On most systems, C<ulimit()> is succeeded by C<rlimit()> hence provides a very limited set of features. =head1 METHODS =head1 FUNCTIONS =head2 Standard POSIX =over 4 =item B<getrlimit>($resource) my ($cur, $max, $success) = getrlimit('RLIMIT_CORE'); my ($cur, $max) = getrlimit('RLIMIT_CORE'); =item B<setrlimit>( $resource, $cur, [$max] ) my $success = setrlimit('RLIMIT_CORE', 1e6, 1e8); =item B<ulimit>($name) Returns the ulimit value related to the named constant. The $name must be a string. C<undef> will be returned when the $name is not known by the system. my $filesize = ulimit('UL_GETFSIZE') || SSIZE_MAX; =back =head2 Additional =over 4 =item B<rlimit_names>() Returns a list with all known resource names, unsorted. =item B<ulimit_names>() Returns a list with all known names, unsorted. =back =head1 CONSTANTS =over 4 =item B<%ulimit> This exported variable is a tied HASH which maps C<UL_*> names on unique numbers, to be used with L<ulimit()|POSIX::1003::Limit/"Standard POSIX">. =item B<%rlimit> This exported variable is a tied HASH which maps C<RLIMIT_*> names on unique numbers, to be used with L<getrlimit()|POSIX::1003::Limit/"Standard POSIX"> and L<setrlimit()|POSIX::1003::Limit/"Standard POSIX">. =back The following constants where detected on your system when the module got installed. The second column shows the value which where returned at that time. For ulimit, with a value when it is a getter: =for comment #TABLE_ULIMIT_START During installation, a symbol table will get inserted here. =for comment #TABLE_ULIMIT_END The constant names for rlimit, with the soft and hard limits that L<getrlimit()|POSIX::1003::Limit/"Standard POSIX"> returned during installation of the module. =for comment #TABLE_RLIMIT_START During installation, a symbol table will get inserted here. =for comment #TABLE_RLIMIT_END =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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