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SOLVED – OS X Update 10.6.3 broke GPGMail with Mail.app
Apr 22nd
Here’s the error:
Internal error: -[MimePart getNumberOfAttachments:isSigned:isEncrypted:]: unrecognized selector sent to instance 0x118db5c90
Here’s more info: http://bit.ly/98pfQR Further to that mail list, I run GPG 2. Since it’s throwing a Cocoa error (unrecognized selector…) it’s gotta be something in the GPGMail app, likely having to do with the random, errant ways Apple changes its APIs.
I’ve no idea how to fix it, so I’m at the mercy of the devs. Good luck, fellows, and Godspeed.
/cs
UPDATE 100604: Thanks, Simon, for you link. Fixed it right up. After quitting Mail.app, I removed ~/Library/Mail/Bundles, and recreated that folder, then dropped this file into it and restarted Mail.app. I can encrypt again! huzzah!
Teensy ELF executables
Mar 17th
Holy crap. I wish I was at awesome as systems programming as this guy.
/cs
at jobs in OS X
Mar 10th
So, Apple turned at off by default, cause who uses at, right? Well, I do. Here’s how you can too:
$ sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.atrun.plist
Once this is done, the at service is running. To make a handy-dandy alert system, try using at with the “open”
command, like so:
$ at 3:01 today [hit return] ps ax | open -f [hit return and Ctrl+D] job 9 at Wed Mar 10 03:01:00 2010
This will run the ps command and pipe the output to the open command. The -f flag tells open to place the input into the default editor for the system, so when your at job runs, TextEdit opens with your ps output.
Also handy for things like:
$ echo "STOP WORKING and go home, you loser" > /tmp/opentxt && open -W -a OmmWriter /tmp/opentxt && rm /tmp/opentxt
This will clear the screen and tell you to go home. 
So, here I go.
/cs
Netstat + MacOS X – Linux = Nightmare
Jan 23rd
Being a Linux user, I am quite accustomed to the netstat flags that I use most often (plant, or sometimes tupac). I recently acquired a MacBook Pro, and found the netstat flags quite different.
clstearns@olly:~$ netstat -ntpl
netstat: l: unknown or uninstrumented protocol
clstearns@olly:~$ netstat -ntl | wc -l
221clstearns@eli:~$ netstat -ntl | wc -l
6
How annoying it is, having to change one’s habits.
Rather than learning the new flags, I pulled out my trusty lsof:
$ lsof -i tcp:22
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
ssh 8383 clstearns 3u IPv4 0x060b0334 0t0 TCP olly.ozymo.com:56829->mail.ozymo.com:ssh (ESTABLISHED)
Using lsof, I can see in the NAME field I can see what kind of connections I have open.
According to the lsof man page, the -i flag takes an option [i] specified as an Internet address. From the man page:
An Internet address is specified in the form (Items in square brackets are optional.):
[46][protocol][@hostname|hostaddr][:service|port]
where:
46 specifies the IP version, IPv4 or IPv6 that applies to the following address. ’6′ may be be specified only if the UNIX dialect supports IPv6. If neither ’4′ nor ’6′ is specified, the following address applies to all IP versions.
protocol is a protocol name – TCP, UDP
hostname is an Internet host name. Unless a specific IP version is specified, open
network files associated with host names of all versions will be selected.hostaddr is a numeric Internet IPv4 address in dot form; or an IPv6 numeric address in
colon form, enclosed in brackets, if the UNIX dialect supports IPv6. When an IP version is selected, only its numeric addresses may be specified.service is an /etc/services name – e.g., smtp – or a list of them.
port is a port number, or a list of them.
At least one address component - 4, 6, protocol, ,IR hostname , hostaddr, or service – must be supplied. These addresses can get hairy, according to this example, which means TCP, ports 1 through 10, service name smtp, port 99, host name foo:
tcp@foo:1-10,smtp,99
lsof allows me to gain the information I need pertaining to my network connections, and when combined with some of the simpler options for MacOS’s netstat version (Mach-O universal binary with 3 architectures; it’s also the BSD4.2 version, whereas my Ubuntu box reports that the installed netstat command version 1.42 is from the net-tools package) it makes for a very handy tool.
Thanks to Greg and the man for the information on lsof.
/cs
doexec
Jan 21st
Check this out:
$ doexec yes lolbutts > /dev/null &
$ ps auxww | grep lolbutts
500 28962 96.8 0.2 58908 544 pts/1 R 11:00 0:06 lolbutts
OK, so now here this:
$ doexec /tmp/udp.pl /usr/sbin/httpd &
$ ps auxww | grep httpd
apache 27601 0.0 12.9 264324 34016 ? S 07:44 0:08 /usr/sbin/httpd
apache 27887 0.0 12.6 265956 33264 ? S 08:42 0:06 /usr/sbin/httpd
apache 28103 0.0 11.2 257932 29452 ? S 09:24 0:03 /usr/sbin/httpd
apache 28108 0.0 11.8 262884 31040 ? S 09:24 0:04 /usr/sbin/httpd
apache 28580 0.1 11.0 257296 28948 ? S 10:56 0:01 /usr/sbin/httpd
apache 29015 90.8 0.2 58908 548 pts/1 R 11:07 0:04 /usr/sbin/httpd
Can you pick which one isn’t really Apache?
Thanks to Kale for pointing out this nifty utility.
/cs