From b4058790cc47d147d3448795da679ea4ccfe4055 Mon Sep 17 00:00:00 2001 From: Michael Stapelberg Date: Wed, 11 Jul 2012 08:58:59 +0200 Subject: [PATCH] remove relative directories from $ENV{PATH} (for taint mode) Otherwise, the module will die when you use it with PATH=$PATH:. (as is the case on the OpenBSD cpan testers). --- lib/AnyEvent/I3.pm | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/lib/AnyEvent/I3.pm b/lib/AnyEvent/I3.pm index 4128870f..2170b267 100644 --- a/lib/AnyEvent/I3.pm +++ b/lib/AnyEvent/I3.pm @@ -8,6 +8,7 @@ use AnyEvent::Handle; use AnyEvent::Socket; use AnyEvent; use Encode; +use Scalar::Util qw(tainted); =head1 NAME @@ -107,12 +108,25 @@ sub new { my ($class, $path) = @_; if (!$path) { + my $path_tainted = tainted($ENV{PATH}); # This effectively circumvents taint mode checking for $ENV{PATH}. We # do this because users might specify PATH explicitly to call i3 in a # custom location (think ~/.bin/). - my $paths = $ENV{PATH}; - if ($paths =~ /^(.*)$/) { - $ENV{PATH} = $1; + (local $ENV{PATH}) = ($ENV{PATH} =~ /(.*)/); + + # In taint mode, we also need to remove all relative directories from + # PATH (like . or ../bin). We only do this in taint mode and warn the + # user, since this might break a real-world use case for some people. + if ($path_tainted) { + my @dirs = split /:/, $ENV{PATH}; + my @filtered = grep !/^\./, @dirs; + if (scalar @dirs != scalar @filtered) { + $ENV{PATH} = join ':', @filtered; + warn qq|Removed relative directories from PATH because you | . + qq|are running Perl with taint mode enabled. Remove -T | . + qq|to be able to use relative directories in PATH. | . + qq|New PATH is "$ENV{PATH}"|; + } } # Otherwise the qx() operator wont work: delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'}; -- 2.39.5