As mentioned in a previous post, Leopard uses launchd to automatically launch ssh-agent when needed. I just noticed that it does exactly the same thing for X11!
Try it: type xeyes in a Terminal window and watch X11.app magically launch itself. Very smooth. Relevant configuration is quite simple:
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"><dict> <key>Label</key><string>org.x.X11</string> <key>Program</key><string>/usr/X11/X11.app/Contents/MacOS/X11</string> <key>Sockets</key> <dict> <key>:0</key> <dict><key>SecureSocketWithKey</key><string>DISPLAY</string></dict> </dict> <key>ServiceIPC</key><true/></dict></plist>
For more information on launchd, see the following man pages: launchd(8), launchctl(1) and launchd.plist(5).
A nice feature I was not aware of is the ability to put user-specific agent definitions in ~/Library/LaunchAgents, very cool.
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A quick tip about using the qlmanage command to see the Quick Look preview of a file from the command line. Define this shell function:
ql(){
qlmanage -p $@ 2>/dev/null
}
Then you can invoke it as
ql FILENAME when needed. Use C-c to exit.
Update: Scott left a great suggestion to use $@ instead of $1. This allows you to bring Quick Look up for multiple files. (It even provides a contact sheet view, nice.) Thanks Scott!
I received and installed Mac OS X 10.5 Leopard on Friday, now I’m getting used to it and will be posting a series of short notes about interesting features as they appear.
One of the first things I noticed is that Leopard seems to start ssh-agent at login. A little more digging reveals that this is due to a LaunchAgent provided by Apple:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN""http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>org.openbsd.ssh-agent</string>
<key>ProgramArguments</key>
<array>
<string>/usr/bin/ssh-agent</string>
<string>-l</string>
</array>
<key>ServiceIPC</key>
<true/>
<key>Sockets</key>
<dict>
<key>Listeners</key>
<dict>
<key>SecureSocketWithKey</key>
<string>SSH_AUTH_SOCK</string>
</dict>
</dict>
</dict>
</plist>
The above causes the agent to be dynamically launched only when you actually need it. That is really cool!
Updated: I just read this hint which mentions that there is also a nice Cocoa ssh-ask-pass in Leopard! Funny thing is that I had seen the dialog a few times without noticing it at all, it seems to just be a normal occurrence. 