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author | markm <markm@FreeBSD.org> | 1998-09-09 07:00:04 +0000 |
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committer | markm <markm@FreeBSD.org> | 1998-09-09 07:00:04 +0000 |
commit | 4fcbc3669aa997848e15198cc9fb856287a6788c (patch) | |
tree | 58b20e81687d6d5931f120b50802ed21225bf440 /contrib/perl5/ext/Opcode/ops.pm | |
download | FreeBSD-src-4fcbc3669aa997848e15198cc9fb856287a6788c.zip FreeBSD-src-4fcbc3669aa997848e15198cc9fb856287a6788c.tar.gz |
Initial import of Perl5. The king is dead; long live the king!
Diffstat (limited to 'contrib/perl5/ext/Opcode/ops.pm')
-rw-r--r-- | contrib/perl5/ext/Opcode/ops.pm | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/contrib/perl5/ext/Opcode/ops.pm b/contrib/perl5/ext/Opcode/ops.pm new file mode 100644 index 0000000..b9ea36c --- /dev/null +++ b/contrib/perl5/ext/Opcode/ops.pm @@ -0,0 +1,45 @@ +package ops; + +use Opcode qw(opmask_add opset invert_opset); + +sub import { + shift; + # Not that unimport is the prefered form since import's don't + # accumulate well owing to the 'only ever add opmask' rule. + # E.g., perl -Mops=:set1 -Mops=:setb is unlikely to do as expected. + opmask_add(invert_opset opset(@_)) if @_; +} + +sub unimport { + shift; + opmask_add(opset(@_)) if @_; +} + +1; + +__END__ + +=head1 NAME + +ops - Perl pragma to restrict unsafe operations when compiling + +=head1 SYNOPSIS + + perl -Mops=:default ... # only allow reasonably safe operations + + perl -M-ops=system ... # disable the 'system' opcode + +=head1 DESCRIPTION + +Since the ops pragma currently has an irreversable global effect, it is +only of significant practical use with the C<-M> option on the command line. + +See the L<Opcode> module for information about opcodes, optags, opmasks +and important information about safety. + +=head1 SEE ALSO + +Opcode(3), Safe(3), perlrun(3) + +=cut + |