ZHM(8)

💖 ZHM — ok bestie, it's the Zephyr HostManager 💖

So like. This is zhm, the Zephyr HostManager, and it lives in section 8 of the system manager's manual. Group-chat role: it's the go-between. The middleman. The main character with a clipboard. 🫶

✨ NAME ✨

zhm — Zephyr HostManager, no cap 💅

✨ SYNOPSIS ✨

/usr/sbin/zhm [ -d ] [ -n ] [ -h ] [ -r ] [ -i ] [ -f ] [ -N ] [ server ... ]

✨ DESCRIPTION ✨

okay so listen. zhm is literally the link between a client machine and the zephyr server. That's the whole job. Every notice sent from programs on the client gets funneled through zhm. All of them. Funneled. 🌀

And that's the point, bestie, because it means all the client programs get to be sooooo much simpler in function — the HostManager is the one handling errors, retransmitting lost notices, and holding onto all the notices until they get acknowledged. She's carrying the whole team fr fr 😤💖

✨ OPTIONS ✨

• -d — turns on debugging mode, and sends its information to syslog LOG_DAEMON messages. Detective mode activated 🔍✨
• -n — causes zhm to not attempt to put itself in the background. She stays right here. In the foreground. With you. 🫶
• -h — causes zhm to send a shutdown message and exit upon delivery of a SIGHUP signal. Just so we're clear, the normal action on SIGHUP is to send a flush notice to the zephyr server — so this option is the glow-up version of that 💅
• -r — causes zhm to send a boot notice to the server and exit when the notice is acknowledged. She says hi, she gets the receipt, she leaves. iconic 👑
• -i — indicates that zhm is being started by inetd(8). When this option is specified, zhm assumes that file descriptor zero (0) is bound to the UDP datagram port designated for hostmanager use. In this mode, SIGHUP is handled as if the -h option were specified. (so -i implies the -h behaviour on SIGHUP, noted 📝)
• -f — disables the "flush" operation which allows any client to flush all subscriptions for the host. no random flushing on her watch 🚫🧼
• -N — supresses the initial "boot" message that flushes all subscriptions for the host, which is useful if you're restarting zhm on a host that people are using. (yes bestie, be considerate of the other users 🥺)
• server ... — the optional server arguments are used to replace the set of server names supplied by the hesiod(3) name server. You can hand-pick your servers. very choose-your-own-adventure 🌈

✨ SEE ALSO ✨

• zephyr(1)
• zephyrd(8)
• inetd(8)
• Project Athena Technical Plan Section E.4.1, Zephyr Notification Service

✨ AUTHOR ✨

David C. Jedlinsky, MIT Project Athena 🎀

✨ RESTRICTIONS ✨

Copyright (c) 1987,1988 by the Massachusetts Institute of Technology. All Rights Reserved. zephyr(1) specifies the terms and conditions for redistribution.

like, read zephyr(1) for the actual legal tea, okay? ⚖️🌸

and that's the whole page, bestie!! mwah 💋

✧･ﾟ: ✧･ﾟ: brought to you by MIT Project Athena, November 1, 1988 :･ﾟ✧:･ﾟ✧ 💖✨🦋