Adam M.
Costello
Miscellaneous Small Utilities
[abiff]
[acjpeg]
[bgsub]
[binhex]
[bsplit]
[butler]
[checkmail]
[colrm]
[dateclock]
[dvorak-to-qwerty]
[dvorak]
[dvorak-exrc]
[find-perl]
[find-posix-sh]
[find-python]
[find-tclsh]
[find-wish]
[grabkey]
[h.soav]
[hexbin]
[iptoname]
[link]
[mkcat]
[moved-command]
[mp3to]
[naughty]
[netscape-snapshot]
[paginate]
[pnminterp]
[ppmtogray]
[ppmuncomposite]
[run]
[self.c]
[sendmail.cf]
[sh-include]
[showtext]
[slow]
[stereosoften]
[uuconvert]
[vt100resize]
[whichkbd]
[wondershaper]
[wormhole]
[xrsh]
- abiff
- Version 3.4.5. A perl script to which you can
forward your mail. It notifies you on any set of hosts, in
whichever windows you have notification turned on. Useful if you
cannot log in to the mail host, and allows custom filtering. Uses
rsh. [This is gross. There should be some general,
efficient notification facility. Maybe someday I'll write one.]
Version 2.41 is a Bourne shell script.
- acjpeg
- Version 0.2.0. A perl script wrapper around cjpeg
that uses an alternative method to adjust the quality/size tradeoff.
Whereas cjpeg linearly scales a single quantization table that was
never designed for such a wide range of quality levels, acjpeg
performs geometric interpolation between six reference tables:
cjpeg's built-in table (used for -q 50), the "normal", "fine", and
"superfine" tables used by the Canon Powershot S40 digital camera,
and two extreme tables (all 1, and all 2047).
- bgsub.c
- Version 1.0.1. ANSI C. Makes simple string
substitutions in binary files.
- binhex.c
- Version 1.00. ANSI C. Converts a binary
input stream to a text (hex) output stream. Works well with hexbin.c.
- butler
- Version 0.5.1. A Tcl/Tk script that performs
configurable actions using the current X selection. I use it to be
able to highlight a URL and click a button to open a new Netscape
window, or to highlight a word and click a different button to
look up the word in the online Webster. Here is an example config file.
- bsplit.c
- Version 1.01. ANSI C. Splits a binary file
into several smaller files.
- checkmail
- Version 1.0.12. A Bourne shell script that checks
a list of email addresses to see when folks last read their mail.
Follows mail forwarding chains to their final destination. Uses
nslookup, telnet, and finger,
among others.
- colrm
- Version 1.00. A Bourne shell script that emulates the
BSD
colrm command using awk. Useful on
SysV systems that lack colrm.
- dateclock
- Version 1.2.2. A Tcl/Tk script that displays a
running clock whose textual date format is configurable, like the
date command. And you can copy & paste from it.
- dvorak-to-qwerty
- Version 1.01. An Expect script that
performs Dvorak->qwerty remapping. See also h.soav.
- dvorak.c
- Version 1.00. Forks a shell in a new pty and performs
qwerty->Dvorak remapping. Uses BSDisms. Known to work under
SunOS 4. See also h.soav.
- dvorak-exrc
- Version 1.01.
vi macros that perform
qwerty->Dvorak remapping. Useful when you're forced to work in
an environment that doesn't allow keyboard remapping (like MS-DOS).
- find-perl
- Lines to put at the top of a Perl script that allow
perl to be anywhere in PATH. Requires
the default shell to be Bourne-like.
- find-posix-sh
- Lines to put at the top of a POSIX shell script that allow the
POSIX shell to be anywhere (in PATH or not). Requires the default
shell to be Bourne-like.
- find-python
- Lines to put at the top of a Python script that allow
python to be anywhere in PATH. Requires
/bin/sh.
- find-tclsh
- Lines to put at the top of a Tcl script that allow
tclsh to be anywhere in PATH. Requires
/bin/sh.
- find-wish
- Lines to put at the top of a Tcl/Tk script that allow
wish to be anywhere in PATH. Requires
/bin/sh. This is just like find-tclsh,
but note that wish will intercept some command-line
arguments, which is usually what you want. If you don't, insert
-- after "$0". Some other Tcl-based
shells are similar, like expect.
- grabkey.c
- Version 1.00. ANSI C plus X11R6. Takes a
keysym (with modifiers) on the command line, grabs that key, waits
for it to be pressed, ungrabs it, and exits. I use it inside
loops in scripts to implement “hot keys” (something
that ought to be provided by
olvwm, but isn't). I
wrote Makefiles for Debian
GNU/Linux, SunOS 5,
FreeBSD, and HP-UX A.09.
- h.soav
- Version 1.11. An Expect script that performs
qwerty->Dvorak remapping. Has more features, and is
more portable than, dvorak.c. The
name “h.soav” is what you get when you type
“dvorak” on a qwerty keyboard while pretending it's
a Dvorak keyboard, which makes this script easy to invoke for
those of us who have forgotten how to type in qwerty. See also dvorak-to-qwerty.
- hexbin.c
- Version 1.00. ANSI C. Converts a text
(hex) input stream to a binary output stream. Works well with binhex.c.
- iptoname
- Version 1.00. A Bourne shell script that
converts its argument, an IP address, to a name by calling
nslookup. Known to work under SunOS 4, SunOS 5,
and NeXTSTEP 3. This has been made obsolete by newer versions
of nslookup that allow IP addresses to be looked up
directly. iptoname.1 is the
man page (nroff).
- link.c
- Version 1.0.1. ANSI C plus POSIX. A wrapper
around the
link() system call. This command exists in
UNIX, but is usually restricted to the super-user.
- mkcat
- Version 1.30.3. A Bourne shell script that mostly
replaces the Solaris 2.[23]
catman command, which had
several problems. I don't know whether any of the problems still
exist in Solaris 2.6. Version 1.30.1 is better tested, but the newer version should be less
dependent on Solaris-isms in make and more robust to
strange filenames.
- moved-command
- Version 1.11. A Bourne shell script that can be put
in the old place of a command that has moved, to notify users of
the new location. If another command with the same name is already
in the user's
PATH, the script calls it transparently.
The script should be removed after a while, once everyone who needs
to see the message has had time to see it.
- mp3to
- Version 1.0.2. A Bourne shell script that uses
mp3info, mpg123, and sox to
convert MP3 files to various other audio formats.
- naughty.c
- Version 1.0.0. ANSI C plus Single
UNIX v2. Opposite of
nice. Just
like nice, except that the default increment is
negative (meaning the process will get more CPU). Must be
installed setuid root, but gives up its privileges before
calling exec(). Should be executable only by group
naughty.
- netscape-snapshot.c
- Version 1.0.1. ANSI C plus X11. Prints
the titles and URLs of all netscape windows. This is a
trivial modification of a pre-release version of remote.c by Jamie Zawinski.
- paginate
- Version 0.1.1. A Bourne shell script that paginates a
text file. Depends on
awk.
- pnminterp
- Version 1.0.1. A Bourne shell script that uses the
netpbm utilities to scale up an image by an integer factor using
linear interpolation.
- ppmtogray
- Version 0.1.0. A Bourne shell script that uses the
netpbm utilities to convert a color image to grayscale. Whereas
ppmtopgm computes luma, ppmtogray computes
luminance, which is what you really want.
- ppmuncomposite & uncomposite-raw.c
- ppmuncomposite version 0.0.1 (Bourne
shell script) depends on uncomposite-raw.c
version 0.0.1 (ANSI C). Given two
versions of an image, one pre-composited against a black
background and one pre-composited against a white background,
reverse-engineers an image with an alpha channel suitable for
compositing against any background. As a demonstration, make-png-google-logo
version 0.1.0 is a Bourne shell script that
fetches the official on-black and on-white versions of
Google's logo
“sticker” GIF images and produces a transparent
PNG image (which may not, I think, be distributed or used publicly
without special permission from Google).
- run.c
- Version 1.00. Execs its first argument (passing any
other arguments) from a child process for which all connections to
the parent process have been severed.
- self.c
- Version 2.2.0. A 76-character (can anyone beat
that?) 100% portable C89 (ANSI C) self-replicating
program (it outputs itself). It does not assume ASCII, ends
with a newline, and does not use
printf without a
prototype (it uses puts instead). See also the Quine Page.
- sendmail.cf
- Version A1.27. A
sendmail configuration
file that should let an internet host send mail directly to any
internet address, without having to go through a mail host.
Known to work under SunOS 4, SunOS 5, and NeXTSTEP 3. This
is a “level 1” configuration file, meaning that
it uses none of the features introduced in sendmail versions
greater than 5. I no longer recommend this; go check out the
sendmail site or the exim site instead.
- sh-include
- Version 1.0.2. Bourne shell code that allows C
header files to be included. Zero-argument
#define
symbols become shell variables. Depends on cpp and
awk.
- showtext
- Version 1.4.7. A Bourne shell script that
converts windows-1252 characters 128 through 159 to their
nearest ASCII approximations, then invokes your pager.
Depends on
nawk, tty, and sometimes
xterm.
- slow.c
- Version 1.00. ANSI C. Copies the input
to the output, inserting NULLs before each character. Useful for
viewing ANSI animations on fast terminals.
- stereosoften.c
- Version 0.2.1. ANSI C. “Hard”
stereo recordings, where some instruments or vocals are entirely
on one channel, can be very uncomfortable to listen to using
headphones. This filter adds a delayed attenuated copy of each
channel to the opposite channel, removing the discomfort while
preserving the illusion that those sounds are entirely on one side.
- uuconvert.c
- This small mish-mash of code has no version control. It's been
touched by many people, lastly myself on Sat 8 Feb 1997.
ANSI C. It's like
uudecode, but ignores
garbage.
- vt100resize.c
- Version 1.04. ANSI C plus POSIX. Asks the
terminal what size it is, informs the tty, and resets the margins to
the full screen. Useful under SunOS 4 because the vt100
termcap entry initializes the terminal with a bottom margin at line
24. Useful with telnet connections under any OS, because telnet,
unlike rlogin, does not propagate window size. Also works with
xterm, and probably a few other terminals.
- whichkbd.c
- Version 1.10. Tells what type of
keyboard is attached to a Sun running SunOS 4 or 5. whichkbd.1 is the man page
(nroff).
- wondershaper
- Version amc-1.0.2. A Bourne shell script that
uses the Linux
tc command and HTB queueing
discipline to reduce network latency. Derived from Debian's modification of
wondershaper
version 1.1.
- wormhole
- Version 1.4.1. A Tcl/Tk script that allows copy/paste
of text across X displays without trust.
- xrsh
- Version 5.8-amc4. A modification of the
X11R6
xrsh script. PATH and
DISPLAY are handled better, quoting in the remote
command is easier, and the icon name is shorter. Version 5.8-amc3-draft1 is older and still
has a few extremely minor bugs, but has been more thoroughly tested
than 5.8-amc4.
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