Printing Hostname in Lua

Question

Pretty sure it is a duplicate. The second answer in the linked post has the exact same answer. — user202729, Nov 09 '21 at 01:50
second answer there uses luacode and a test, not a print. it is of course based on it and similar, which is why I put the one-liner here. — ivo Welch, Nov 09 '21 at 16:56

score 2 · Answer 1 · answered Dec 08 '21 at 18:02

2

The hostname is available in LuaTeX through the socket library:

\directlua{
  token.set_macro('hostname', socket.dns.gethostname())
}
Compiled on \hostname.
\bye

answered Dec 08 '21 at 18:02

Marcel Krüger

ivo Welch · Accepted Answer · 2021-11-18T20:27:48.003

0

\def\hostname{
  \directlua{
    tex.print(os.getenv('HOSTNAME'))
  }}
    Compiled: \today\ on \hostname.

but see Marcel's comment.

edited Nov 18 '21 at 20:27

answered Nov 08 '21 at 22:26

ivo Welch

4

This doesn't work in general. HOSTNAME is not specified in any standard I am aware of and in many systems (including e.g. Arch Linux) not set by default. – Marcel Krüger Nov 08 '21 at 22:56
Windows doesn't know anything about it either (where it's COMPUTERNAME) – Joseph Wright Dec 08 '21 at 17:02

2 Answers2