On Mar 6, 2006, at 1:40 AM, Mark Crispin wrote:
I don't know much about launchd, other than the fact that it uses
XML (shudder) and follows Apple's typical contempt of standards.
Oh please! What standards? If there's a uniform and performant
solution that addresses system-init, network daemon listers, system-
and per-user time-scheduled execution and the like, can we have a
link to it? It was precisely this void that prompted Apple to create
launchd.
Branding Apple as contemptuous of standards is rich indeed from the
author of a distribution that hard-codes configuration settings in
deeply-buried source files. What happened to the de-facto standard of
using runtime configuration files like dhcpd, BIND, postfix, and
Apache do? Never have I needed to repeatedly put configuration items
in their source files (nor recompile to change them!) and their
settings persist with almost no effort on my part from one release to
the next.
But more broadly, when I "don't know much about" something I make an
effort to learn about it before criticizing. To that end, there is
readily-available information on launchd <http://developer.apple.com/
macosx/launchd.html>.
imapd and ipop3d do no TCP I/O on their own. All their I/O is via
stdio; thus they are always invoked by the system's TCP listener
(inetd or xinetd or launchd).
I build it using the OS X (PAM) target:
make oxp
and copy the 2 executables:
sudo cp ./imapd/imapd /usr/local/sbin/ ; sudo chown root:wheel /usr/
local/sbin/imapd
sudo cp ./ipopd/ipop3d /usr/local/sbin/ ; sudo chown root:wheel /usr/
local/sbin/ipop3d
(BTW, to make SSL mean much, one should procure a server certificate.
With just a few clients even a self-signed one is manageable.)
I use two launchd .plist files: /Library/LaunchDaemons/
edu.washington.<imapd | pop3d>.plist. Each handles the plain and ssl
form of the service. Here's my imap one:
<?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>Disabled</key>
<false/>
<key>Label</key>
<string>edu.washington.imapd</string>
<key>ServiceDescription</key>
<string>IMAP Server</string>
<key>ProgramArguments</key>
<array>
<string>/usr/local/sbin/imapd</string>
</array>
<key>inetdCompatibility</key>
<dict>
<key>Wait</key>
<false/>
</dict>
<key>Sockets</key>
<dict>
<key>plain</key>
<dict>
<key>SockServiceName</key>
<string>imap</string>
<key>SockType</key>
<string>stream</string>
</dict>
<key>ssl</key>
<dict>
<key>SockServiceName</key>
<string>imaps</string>
<key>SockType</key>
<string>stream</string>
</dict>
</dict>
</dict>
</plist>
Best regards,
Mike Cashwell
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