Free stdin software for linux

iodine is a piece of software that lets you tunnel IPv4 data through a DNS server. This can be useful in situations where Internet access is firewalled, but DNS queries are allowed.
iodine needs a TUN/TAP device to operate. The bandwidth is asymmetrical with limited upstream and up to 1 Mbit/s downstream.
Enhancements:
- Multiuser support was added for up to 8 users simultaneously.
- Authentication was added, and a password is entered as an argument or on stdin.
- A manpage was added. "make" targets were added for "install" and "uninstall".
- The DNS code was cleaned up.
- More test cases were added.
- The directory structure was changed.

Crystality Plugin consists of XMMS plugin and stdin/stdout plugin. It was written for realtime remastering of sound from mp3 files.
You will need a reasonably good stereo and a good ear to notice quality
improvement, otherwise this is not for you.

This plugin tries to patch mp3 format flaws, not a poor audio hardware! Yes, you should be able to hear well enough (sorry) - for some of my friends plugin is a cool thing, while the others does not hear nothing but echo and stereo expander (well, you will hear every effect if you set it to the maximum, but it will not sound nice).

Crystality was written for 16bit 44.1kHz stereo sound and may give strange results
with other sound formats.

Damian Hodgkiss sent me a quick port for Winamp 2.x. I have not tried it yet, but you can get it (cr-quick-winamp-port.zip).

This plugin does mainly four things (and some minor tricks):

1. Adds some sounds in very high frequency range. Most of the mp3s in The Net are flawed with a 16(15?) kHz cutoff. Even these ones compressed at high bitrates. This spectrum hole is audible and very unpleasant. This plugin helps a bit. Old mp3s made from the vinyl or the magnetic tape may also sound better with these "steroids". For old mp3s youll probably need to set filter to 0.1.

2. Adds some even harmonic distortions (actually nonlinearity), that sounds nice. Valve amps introduce even harmonic distortions (although differnt way) Look at audiophile pages for more info (well, mp3 format is not an audiophile stuff at all, but... welcome to the real world...).

3. Adds simple, but nice 3D echo (concert hall or church like). Most of echo plugins sounds too hard and aggresively for me. This one does not.

4. Extends stereo.

USING:

There are currently two versions of plugin - XMMS plugin and stdin/stdout. Stdin/out plugin is completly independent of XMMS plugin. It even stores its configuration in a separate file (~/.crystalityrc). Stdin/out plugin is alpha code, so some features are missed. You cannot reopen configuration dialog after closing without restarting plugin, there are no "save config", "load config" buttons. Configuration is loaded automatically on startup and saved on exit, either on normal finish or ^C. You can disable GUI with -g option (useful in scripts).

Because this plugin adds some sounds at high frequencies, you will probably need to decrease treble level on your amplifier. Plugin does not perform normalization, so you should slightly decrease signal level in XMMS equalizer (NOT volume slider on the main panel). Setting sliders to the maximum is generally a bad idea (well, except the filter, where that setting is useful).

PERFORMANCE:

It eats about 15% of CPU on my AMD K6-2/400 and optimization is still possible, this is not highly optimized code.

INSTALLATION:

Distribution contains binary version of XMMS plugin library and stdin/stdout plugin executable (Linux i586, glibc 2.1.3). You may copy plugin library file (libcrystality.so) into XMMSs Effect directory and executable (crystality-stdio) to /usr/local/bin or any location you prefer. For default locations simply type:

make install

and thats it.
You may also build crystality from the source.

make buildinstall

typed as root in the source directory should be all you have to do.

This plugin was my first small step in gtk programming, so dont expect any wonders, GUI is actually a quick hack to hardcoded settings. I am not a GUI programmer.

Scalar::Util is a selection of general-utility scalar subroutines.

SYNOPSIS

use Scalar::Util qw(blessed dualvar isweak readonly refaddr reftype tainted
weaken isvstring looks_like_number set_prototype);

Scalar::Util contains a selection of subroutines that people have expressed would be nice to have in the perl core, but the usage would not really be high enough to warrant the use of a keyword, and the size so small such that being individual extensions would be wasteful.

By default Scalar::Util does not export any subroutines. The subroutines defined are

blessed EXPR

If EXPR evaluates to a blessed reference the name of the package that it is blessed into is returned. Otherwise undef is returned.

$scalar = "foo";
$class = blessed $scalar; # undef

$ref = [];
$class = blessed $ref; # undef

$obj = bless [], "Foo";
$class = blessed $obj; # "Foo"

dualvar NUM, STRING

Returns a scalar that has the value NUM in a numeric context and the value STRING in a string context.

$foo = dualvar 10, "Hello";
$num = $foo + 2; # 12
$str = $foo . " world"; # Hello world

isvstring EXPR

If EXPR is a scalar which was coded as a vstring the result is true.

$vs = v49.46.48;
$fmt = isvstring($vs) ? "%vd" : "%s"; #true
printf($fmt,$vs);

isweak EXPR

If EXPR is a scalar which is a weak reference the result is true.

$ref = $foo;
$weak = isweak($ref); # false
weaken($ref);
$weak = isweak($ref); # true

NOTE: Copying a weak reference creates a normal, strong, reference.

$copy = $ref;
$weak = isweak($ref); # false

looks_like_number EXPR

Returns true if perl thinks EXPR is a number. See "looks_like_number" in perlapi.

openhandle FH

Returns FH if FH may be used as a filehandle and is open, or FH is a tied handle. Otherwise undef is returned.

$fh = openhandle(*STDIN); # *STDIN
$fh = openhandle(*STDIN); # *STDIN
$fh = openhandle(*NOTOPEN); # undef
$fh = openhandle("scalar"); # undef

readonly SCALAR

Returns true if SCALAR is readonly.

sub foo { readonly($_[0]) }

$readonly = foo($bar); # false
$readonly = foo(0); # true

refaddr EXPR

If EXPR evaluates to a reference the internal memory address of the referenced value is returned. Otherwise undef is returned.

$addr = refaddr "string"; # undef
$addr = refaddr $var; # eg 12345678
$addr = refaddr []; # eg 23456784

$obj = bless {}, "Foo";
$addr = refaddr $obj; # eg 88123488

reftype EXPR

If EXPR evaluates to a reference the type of the variable referenced is returned. Otherwise undef is returned.

$type = reftype "string"; # undef
$type = reftype $var; # SCALAR
$type = reftype []; # ARRAY

$obj = bless {}, "Foo";
$type = reftype $obj; # HASH

set_prototype CODEREF, PROTOTYPE

Sets the prototype of the given function, or deletes it if PROTOTYPE is undef. Returns the CODEREF.

set_prototype &foo, $$;

tainted EXPR

Return true if the result of EXPR is tainted

$taint = tainted("constant"); # false
$taint = tainted($ENV{PWD}); # true if running under -T

weaken REF

REF will be turned into a weak reference. This means that it will not hold a reference count on the object it references. Also when the reference count on that object reaches zero, REF will be set to undef.

This is useful for keeping copies of references , but you dont want to prevent the object being DESTROY-ed at its usual time.

{
my $var;
$ref = $var;
weaken($ref); # Make $ref a weak reference
}
# $ref is now undef

Note that if you take a copy of a scalar with a weakened reference, the copy will be a strong reference.

my $var;
my $foo = $var;
weaken($foo); # Make $foo a weak reference
my $bar = $foo; # $bar is now a strong reference

This may be less obvious in other situations, such as grep(), for instance when grepping through a list of weakened references to objects that may have been destroyed already:

@object = grep { defined } @object;

This will indeed remove all references to destroyed objects, but the remaining references to objects will be strong, causing the remaining objects to never be destroyed because there is now always a strong reference to them in the @object array.

JavaScript::Minifier is a Perl translation of jsmin.c.

SYNOPSIS

use JavaScript::Minifier;
my $obj = new JavaScript::Minifier;
$obj->minify(*STDIN, *STDOUT);

use JavaScript::Minifier qw(jsmin);
jsmin(*STDIN, *STDOUT);

This work is a translation from C to Perl of jsmin.c published by Douglas Crockford. Permission is hereby granted to use the Perl version under the same conditions as the jsmin.c on which it is based.

Refer to the JSMin website for further information: http://javascript.crockford.com/jsmin.html
Speed is a bit slower than the python version and the python and perl versions are quite a bit slower than the c version(of course).

Here are test results processing a 71K javascript file. This is one of the largest we have -- most are considerably smaller.

| wall clock seconds(approximate)
---------------------------------------
Perl: | 1.4
Python: | 1.0
C: | 0.03

Tests performed on a Intel(R) Pentium(R) 4 CPU 1.80GHz under no load.

Pod::PlainText is a Perl module that can convert POD data to formatted ASCII text.

SYNOPSIS

use Pod::PlainText;
my $parser = Pod::PlainText->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);

Pod::PlainText is a module that can convert documentation in the POD format (the preferred language for documenting Perl) into formatted ASCII. It uses no special formatting controls or codes whatsoever, and its output is therefore suitable for nearly any device.

As a derived class from Pod::Parser, Pod::PlainText supports the same methods and interfaces. See Pod::Parser for all the details; briefly, one creates a new parser with Pod::PlainText->new() and then calls either parse_from_filehandle() or parse_from_file().

dicelab allows you to express complex dice rolling schemes in a functional language and then roll dice according to such a scheme or analyze the statistic distribution of values.
It is useful when designing games (and to some degree when playing them).
Usage: dicelab [options] [-f < file >]
Options:
--help -h -? print this text
--version -v print the program version
--print-tree -p print the parse tree (for debugging)
--eval -e evaluate the statistical distribution by
re-rollingp
--count -c specify the number of rolls used with --eval
default is 10000
--roll -r roll the dice as specified, will also be used
if no other action is requested
File:
--file -f read the dice rolling specs from the file
specified, use stdin if not supplied
Enhancements:
- The program is much faster now.

AESCrypt is a program for encrypting/decrypting streams of data using Rijndael and Cipher Block Feedback mode (CFB-128).
Encrypt/decrypt stdin using the Advanced Encryption Standard winner "Rijndael" encryption algorithm in Cipher Block Feedback (stream) mode. Uses /dev/urandom to create a salt. Prepends the output stream with salt when encrypting, strips it off when decrypting.
Keyfile format:
kk=hexdits
where hexdits is:
32 chars for 128 bit
48 chars for 196 bits.
64 chars for 256 bits
Note that there may be other text in the file. The key must be at start of a line, and must start with kk=, and must be hex.
If the key file is "-", it instead reads the hex-coded key bytes off stdin and treats them as a null-terminated hex key. Care must be taken when reading the key from stdin, as you must supply exactly 33 bytes for 128 bit keys, 49 bytes for 192 bit keys, and 65 bytes for 256 bit keys. The stdin functionality is useful in those cases where having the unencrypted key in a file is undesirable, but it is less forgiving in terms of key format.
Version restrictions:
- 1. The keyfile is *NOT* encrypted.
- 2. Now supports 192 and 256 bit keys! 128 bits is the default, so it is backward compatible with aescrypt versions not endowed with the -s option.
- 3. Need a key generator! ( This should be a simple shell script -- use dd to grab some data, then md5sum to create a hex mix of that data, then awk to grab the hex part of the output of md5sum ).
- 4. Relies upon having /dev/urandom. See the Ocotillo PRNG if you dont have a /dev/urandom.
- 5. This program was deliberately kept extremely simple. It is not intended to be a full encryption solution, it is intended to be used within scripts as part of a complete solution. Keychain management, public key signatures, etc. are all expected to be done external to this program.