/ 
perl-5.40.1
⭐ Starred 2013
/ Pod::Text::Overstrike
Security Advisories (2)
CVE-2024-56406 (2025-04-13)

A heap buffer overflow vulnerability was discovered in Perl. When there are non-ASCII bytes in the left-hand-side of the `tr` operator, `S_do_trans_invmap` can overflow the destination pointer `d`.    $ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;'    Segmentation fault (core dumped) It is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.

CVE-2025-40909 (2025-05-30)

Perl threads have a working directory race condition where file operations may target unintended paths. If a directory handle is open at thread creation, the process-wide current working directory is temporarily changed in order to clone that handle for the new thread, which is visible from any third (or more) thread already running. This may lead to unintended operations such as loading code or accessing files from unexpected locations, which a local attacker may be able to exploit. The bug was introduced in commit 11a11ecf4bea72b17d250cfb43c897be1341861e and released in Perl version 5.13.6

NAME

Pod::Text::Overstrike - Convert POD data to formatted overstrike text

SYNOPSIS

use Pod::Text::Overstrike;
my $parser = Pod::Text::Overstrike->new (sentence => 0, width => 78);

# Read POD from STDIN and write to STDOUT.
$parser->parse_from_filehandle;

# Read POD from file.pod and write to file.txt.
$parser->parse_from_file ('file.pod', 'file.txt');

DESCRIPTION

Pod::Text::Overstrike is a simple subclass of Pod::Text that highlights output text using overstrike sequences, in a manner similar to nroff. Characters in bold text are overstruck (character, backspace, character) and characters in underlined text are converted to overstruck underscores (underscore, backspace, character). This format was originally designed for hard-copy terminals and/or line printers, yet is readable on soft-copy (CRT) terminals.

Overstruck text is best viewed by page-at-a-time programs that take advantage of the terminal's stand-out and underline capabilities, such as the less program on Unix.

Apart from the overstrike, it in all ways functions like Pod::Text. See Pod::Text for details and available options.

BUGS

Currently, the outermost formatting instruction wins, so for example underlined text inside a region of bold text is displayed as simply bold. There may be some better approach possible.

COMPATIBILITY

Pod::Text::Overstrike 1.01 (based on Pod::Parser) was the first version of this module included with Perl, in Perl 5.6.1.

The current API based on Pod::Simple was added in Pod::Text::Overstrike 2.00, included in Perl 5.9.3.

Several problems with wrapping and line length were fixed as recently as Pod::Text::Overstrike 2.04, included in Perl 5.11.5.

This module inherits its API and most behavior from Pod::Text, so the details in "COMPATIBILITY" in Pod::Text also apply. Pod::Text and Pod::Text::Overstrike have had the same module version since 4.00, included in Perl 5.23.7. (They unfortunately diverge in confusing ways prior to that.)

AUTHOR

Originally written by Joe Smith <Joe.Smith@inwap.com>, using the framework created by Russ Allbery <rra@cpan.org>. Subsequently updated by Russ Allbery.

COPYRIGHT AND LICENSE

Copyright 2000 by Joe Smith <Joe.Smith@inwap.com>

Copyright 2001, 2004, 2008, 2014, 2018-2019, 2022 by Russ Allbery <rra@cpan.org>

This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.

SEE ALSO

Pod::Text, Pod::Simple

The current version of this module is always available from its web site at https://www.eyrie.org/~eagle/software/podlators/. It is also part of the Perl core distribution as of 5.6.0.