$ cat textst7.tex && luatex textst7
\directlua {a = io.popen("ls /")
if a == nil then
print "Woe is me!"
else
for c in a:lines(1) do print(c) end
io.close(a)
end}
\bye
This is LuaTeX, Version beta-0.70.2-2012062812 (TeX Live 2012)
restricted \write18 enabled.
(./textst7.texWoe is me!
)
No pages of output.
Transcript written on textst7.log.
Why? Works as standalone lua.
What I want is for my TeX document to read BLOBs (PDF images) and
other stuff from a PostgreSQL database. So "ls /" would become a psql
(SQL) command.
