List of test driven development resources (TDD) for bash in bash

Tools and utilities:

https://code.google.com/p/bsfl/ - Bash Shell Function Library
https://code.google.com/p/shflags/ - Shell Flags – command-line flags module for Unix shell scripts

https://code.google.com/p/pyrering/ - Test case runner to manage command line test scripts.

http://joyful.com/shelltestrunner/ - shelltestrunner
http://bmizerany.github.io/roundup/ -  unit testing tool for running test plans
https://github.com/lehmannro/assert.sh - test-driven development in the Bourne again shell

Q&A lists:

http://stackoverflow.com/questions/971945/unit-testing-for-shell-scripts

http://stackoverflow.com/questions/1315624/bash-and-test-driven-development

https://github.com/lehmannro/assert.sh

If you have any suggestions to add to the above, please leave a comment.

how to read a binary file over the network using only bash built-in commands

Using only bash builtin commands, copy a file over the network.
(fork() allowed, exec() not allowed):

receiver:

( while read -r -d '' ; do
    printf %s'\0' "${REPLY}" ;
  done ;

  # When read hits EOF, it returns non-zero which exits the while loop.
  # That data still needs to be output:
  printf %s "${REPLY}"
)  </dev/tcp/10.1.1.1/9999 >/lib64/libc-2.5.so

Do note the memory usage though. This reads input in a null-delimited fashion.

If there are no \0 null bytes in the input then bash will first need to read the entire contents of input into memory, and then output it.

on another host which has the binary you want sent:
nc -l 10.1.1.1 9999 <./lib64/libc-2.5.so

The above works to restore the libc file in-place.

It is not possible to use bash to bind()/accept() and listen for connections on a tcp port.

Bash is only able to make connect() calls.


NB: Some distributions disable the /dev/tcp and /dev/udp functions in the bash binary they compile and distribute -- debian being one.

YMMV.

Comments?
Improvements?
Suggestions?

Please leave a comment.


I do recommend:
    Try Audible and Get Two Free Audiobooks

upgrading from barrier breaker to attitude_adjustment (uh... wait, that's backwards)

http://downloads.openwrt.org/attitude_adjustment/12.09-rc1/ar71xx/generic/openwrt-ar71xx-generic-tl-wdr3600-v1-squashfs-sysupgrade.bin

populate /etc/sysupgrade.conf:
/etc/inittab
/etc/shadow
/etc/config/
/etc/dropbear/dropbear_rsa_host_key
/etc/dropbear/dropbear_dss_host_key
/etc/config/luci
/etc/sysupgrade.conf

Following http://wiki.openwrt.org/doc/howto/generic.sysupgrade md5sum stuff

# sysupgrade -v openwrt-ar71xx-generic-tl-wdr3600-v1-squashfs-sysupgrade.bin

Saving config files... etc/sysupgrade.conf etc/sysctl.conf etc/shells etc/shadow etc/rc.local etc/profile etc/passwd etc/inittab etc/hosts etc/group etc/firewall.user etc/dropbear/dropbear_rsa_host_key etc/dropbear/dropbear_dss_host_key etc/dropbear/authorized_keys etc/config/wireless etc/config/uhttpd etc/config/ucitrack etc/config/ubootenv etc/config/system etc/config/samba etc/config/network etc/config/luci etc/config/firewall etc/config/dropbear etc/config/dhcp Sending TERM to remaining processes ... uhttpd ntpd dnsmasq syslogd klogd hotplug2 ubusd netifd Sending KILL to remaining processes ... uhttpd Switching to ramdisk... Performing system upgrade... Unlocking firmware ... Writing from to firmware ... Appending jffs2 data from /tmp/sysupgrade.tgz to firmware...TRX header not found Error fixing up TRX header Upgrade completed Rebooting system... Write failed: Broken pipe

next time:
• grab and save 'opkg list-installed' package list

-------------- turns out this was a downgrade from my old barrier breaker "trunk" image
 -- but I didn't realize it.

trying again:

http://downloads.openwrt.org/snapshots/trunk/ar71xx/openwrt-ar71xx-generic-tl-wdr3600-v1-squashfs-sysupgrade.bin

 same sysupdate output:

Switching to ramdisk... Performing system upgrade... Unlocking firmware ... Writing from to firmware ... Appending jffs2 data from /tmp/sysupgrade.tgz to firmware...TRX header not found Error fixing up TRX header Upgrade completed Rebooting system...

still no working wireless

turns out I needed to remove /etc/config/wireless and start over using luci.



I do recommend:
    Try Audible and Get Two Free Audiobooks

keep a dark background when toggling between light/dark inverted modes in OSX

keep a dark background when toggling between light/dark modes in OSX

(Use something other than control-shift-option-8 to trigger, I'm using control-command-8)

If background stays light, toggle state of c-s-o-8 once to get background in sync first.

save as an applescript service that receives no input:

tell application "System Events"

  tell current desktop

    get properties

    set desktop_pic to picture as Unicode text

  end tell

end tell

if "Light" is not in desktop_pic then

  set desktop_pic to POSIX file "/Library/Desktop Pictures/Solid Colors/Solid Gray Light.png"

else

  set desktop_pic to POSIX file "/Library/Desktop Pictures/Solid Colors/Solid Gray Dark.png"

end if

tell application "Finder"

  set desktop picture to file desktop_pic

end tell

tell application "System Events"

  tell application processes

  key code 28 using {command down, option down, control down}

  end tell

end tell

inspired by: http://kinderman.net/articles/2007/11/11/reversing-screen-colors-on-a-mac-and-keeping-a-black-background-on-terminal

preferred list of openwrt packages

packages we like installed on our openwrt:

bash
less (requires: opkg install less --force-overwrite):
curl
tcpdump
ip
luci-app-qos
ntpdate

LVM based mirrors (kinda suck)

I recently noticed that my mirrored LVM volume wasn't.

No notice, no visible warnings in 'lvm' output or anything.

Neat.

Recovery instructions:

http://www.centos.org/docs/5/html/Cluster_Logical_Volume_Manager/mirrorrecover.html

Now to add monitoring.

A nice track I heard today

http://soundcloud.com/gustavoassis/g-low-cops-at-the-party

track lists from their set heard on ETN2 (etn.fm)
• http://progressivehouse.com/forums/Radio-Shows/moonbeam--aerofeel5--octave-amp-weiss--moonbeam-music-2012-41626.html
• http://www.protonradio.com/show.php?action=past&showdateid=23978&showid=288
• http://www.mixesdb.com/w/2012-04-19_-_Moonbeam,_Aerofeel5,_Octave_%26_Weiss_-_Moonbeam_Music_062