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safetool
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#!/usr/bin/perl
#
# safetool -- An attempt to beat naughty packages into submission
#
# Copyright (C) 2000-2007, Michael Jennings
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies of the Software, its documentation and marketing & publicity
# materials, and acknowledgment shall be given in the documentation, materials
# and software packages that this Software was used.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
# $Id: safetool,v 1.9 2007/02/27 21:29:36 mej Exp $
#
# Include the Perl Modules we need
use POSIX 'strftime';
# Generate timestamp for debugging/log file
sub
get_timestamp
{
return strftime("%A, %d %B %Y %H:%M:%S %Z", localtime);
}
# Log file output
sub
lprintf
{
print "[$progname $$ ${\(&get_timestamp())}] ";
my $fmt = shift;
printf $fmt, @_;
}
sub
lprint
{
print "[$progname $$ ${\(&get_timestamp())}] ", @_;
}
# Check options for install
sub
parse_options_for_install
{
my @args;
my ($cwd, $end_of_opts, $tmp, $skip, $arg);
chomp($cwd = `pwd`);
$end_of_opts = $skip = 0;
foreach my $arg (@_) {
if ($skip) {
$skip--;
next;
}
if ($arg eq "--") {
$end_of_opts = 1;
next;
}
if (! $end_of_opts) {
if ($arg eq "-o" || $arg eq "-g") {
$skip = 1;
next;
} elsif ($arg =~ /^-[og].+/) {
next;
}
}
push @args, $arg;
}
$arg = $args[$#arg];
if (-e $arg) {
if ($arg !~ /^\//) {
$tmp = $cwd . "/$arg";
} else {
$tmp = $arg;
}
if ($tmp !~ /^\/tmp/ && $tmp !~ /^\/var\/tmp/ && $tmp !~ /\/BUILD\//) {
lprint "Argument \"$arg\" ($tmp) points to a file/directory which it shouldn't. Exiting.\n";
return ();
}
}
return @args;
}
# Check options for a generic program
sub
parse_options_generic
{
my @args = @_;
my ($cwd, $end_of_opts, $tmp);
chomp($cwd = `pwd`);
$end_of_opts = 0;
foreach my $arg (@_) {
if ($arg eq "--") {
$end_of_opts = 1;
next;
}
next if (($arg =~ /^-/) && (! $end_of_opts)); # It's an unknown option
next if (! -e $arg); # It's not a file, or it's a non-existent file
if ($arg !~ /^\//) {
$tmp = $cwd . "/$arg";
} else {
$tmp = $arg;
}
if ($tmp !~ /^\/tmp/ && $tmp !~ /^\/var\/tmp/ && $tmp !~ /\/BUILD\//) {
lprint "Argument \"$arg\" ($tmp) points to a file/directory which it shouldn't. Exiting.\n";
return ();
}
}
return @args;
}
# main() here is basically the same as main() in C
sub
main
{
my @args;
if ($0 =~ /safetool$/) {
return 0;
}
# Set up the basic variables
$progname = "safetool";
$version = "2.0";
$logfile = "/var/tmp/safetool.log";
$argc = $#ARGV + 2;
umask 022;
# Open logfile
if (open(LOGFILE, ">>$logfile")) {
chmod(0666, $logfile);
} else {
open(LOGFILE, ">&STDOUT");
}
select LOGFILE; $| = 1;
# Set up the environment
$ENV{PATH} = "/bin:/usr/bin:/sbin:/usr/sbin";
# Do the work
($fake_prog = $0) =~ s/^.*\/([^\/]+)$/$1/;
lprint "Called for $fake_prog: $0 \"", join("\" \"", @ARGV), "\"\n";
if ($fake_prog =~ /install$/) {
@args = &parse_options_for_install(@ARGV);
} else {
@args = &parse_options_generic(@ARGV);
}
print "\n";
close(LOGFILE);
if ($#args >= 0) {
return (system($fake_prog, @args) >> 8);
} else {
return 0;
}
}
exit &main();