UDPLSI(1)

💖 UDPLSI(1) 💖

okay bestie, so this is udplsi — a UDP-based LTP link service input task. that's the whole vibe, let's get into it 🦋

---

✨ NAME ✨

udplsi — UDP-based LTP link service input task. yeah. it's giving "background task that does one job and does it flawlessly" 💅

---

🌸 SYNOPSIS 🌸

udplsi {local_hostname | @}[:local_port_nbr]

---

🎀 DESCRIPTION 🎀

so like. udplsi is a background "daemon" task, right? and what it does is: it receives UDP datagrams through a UDP socket that's bound to local_hostname and local_port_nbr. then it pulls the LTP segments out of those datagrams and hands them over to the local LTP engine. that's it. that's the job. no cap. 👑

and listen — if you put "@" as the host name, that means "hey, just use whatever host name hostname(1) gives back as the socket's host name." iconic shortcut behavior tbh.

if you don't specify a port number at all? it defaults to 1113. lowkey important, don't forget it.

the way this task actually shows up in the world: it gets spawned automatically by ltpadmin in response to the 's' command (the one that starts operation of the LTP protocol). and like — the text of the command that's used to spawn the task has to be provided as a parameter to that 's' command. so you don't just vibe-spawn it yourself, bestie, it comes with the package 🫶

and when it's time to go? the link service input task gets terminated by ltpadmin in response to an 'x' (STOP) command. clean exit, main character energy, periodt.

---

💀 EXIT STATUS 💀

• "0" — udplsi terminated normally, for reasons noted in the ion.log file. now. if this termination was not commanded by you, you gotta investigate and solve the problem identified in the log file, and then use ltpadmin to restart udplsi. don't just shrug it off bestie 😭
• "1" — udplsi terminated abnormally, for reasons noted in the ion.log file. investigate and solve the problem identified in the log file, then use ltpadmin to restart udplsi. fr fr, read the log.

---

🍓 FILES 🍓

No configuration files are needed. literally none. we love a low-maintenance queen ✨

---

🧚 ENVIRONMENT 🧚

No environment variables apply. nothing to export, nothing to source, we simply exist 🌈

---

🔥 DIAGNOSTICS 🔥

these are the diagnostics that may get written to the ion.log log file. keep an eye out 👀

• udplsi can't initialize LTP. ltpadmin has not yet initialized LTP protocol operations. so like, do that first, bestie.
• LSI task is already started. Redundant initiation of udplsi. it's already here. it's already serving. let her cook 💅
• LSI can't open UDP socket Operating system error. Check errtext, correct the problem, and restart udplsi.
• LSI can't initialize socket Operating system error. Check errtext, correct the problem, and restart udplsi.
• LSI can't create receiver thread Operating system error. Check errtext, correct the problem, and restart udplsi.

okay so notice a pattern? three of those are OS errors and the fix is always the same: check errtext, fix the actual problem, restart udplsi. don't skip the middle step, that's the whole point 🙈

---

😭 BUGS 😭

Report bugs to <ion-bugs@korgano.eecs.ohiou.edu>. they want to hear from you, genuinely, that's the whole address 🫶

---

👑 SEE ALSO 👑

ltpadmin(1), udplso(1), owltsim(1) — go read those too, they're all part of the same little friend group 🌸

---

and that's the page, bestie!! this one came from the LTP executables manual, written by perl v5.24.1 and dated 2016-07-07 — yes she's an elder but she still ate 💖✨