| 1 |
root |
1.1 |
package ops; |
| 2 |
|
|
|
| 3 |
|
|
our $VERSION = '1.00'; |
| 4 |
|
|
|
| 5 |
|
|
use Opcode qw(opmask_add opset invert_opset); |
| 6 |
|
|
|
| 7 |
|
|
sub import { |
| 8 |
|
|
shift; |
| 9 |
|
|
# Not that unimport is the prefered form since import's don't |
| 10 |
|
|
# accumulate well owing to the 'only ever add opmask' rule. |
| 11 |
|
|
# E.g., perl -Mops=:set1 -Mops=:setb is unlikely to do as expected. |
| 12 |
|
|
opmask_add(invert_opset opset(@_)) if @_; |
| 13 |
|
|
} |
| 14 |
|
|
|
| 15 |
|
|
sub unimport { |
| 16 |
|
|
shift; |
| 17 |
|
|
opmask_add(opset(@_)) if @_; |
| 18 |
|
|
} |
| 19 |
|
|
|
| 20 |
|
|
1; |
| 21 |
|
|
|
| 22 |
|
|
__END__ |
| 23 |
|
|
|
| 24 |
|
|
=head1 NAME |
| 25 |
|
|
|
| 26 |
|
|
ops - Perl pragma to restrict unsafe operations when compiling |
| 27 |
|
|
|
| 28 |
|
|
=head1 SYNOPSIS |
| 29 |
|
|
|
| 30 |
|
|
perl -Mops=:default ... # only allow reasonably safe operations |
| 31 |
|
|
|
| 32 |
|
|
perl -M-ops=system ... # disable the 'system' opcode |
| 33 |
|
|
|
| 34 |
|
|
=head1 DESCRIPTION |
| 35 |
|
|
|
| 36 |
|
|
Since the ops pragma currently has an irreversible global effect, it is |
| 37 |
|
|
only of significant practical use with the C<-M> option on the command line. |
| 38 |
|
|
|
| 39 |
|
|
See the L<Opcode> module for information about opcodes, optags, opmasks |
| 40 |
|
|
and important information about safety. |
| 41 |
|
|
|
| 42 |
|
|
=head1 SEE ALSO |
| 43 |
|
|
|
| 44 |
|
|
Opcode(3), Safe(3), perlrun(3) |
| 45 |
|
|
|
| 46 |
|
|
=cut |
| 47 |
|
|
|
