File descriptor question
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- Subject: File descriptor question
- From: Bernd Eggink <monoped@...>
- Date: 2012年3月13日 18:30:29 +0100
Hi all,
what I'm missing most in the standard IO library is the possibility to
choose arbitrary file descriptors. The problem is, I have a Lua program
A from which I start an xterm which executes program B:
os.execute("xterm -e B")
At exit, B prints a result, which I want to read and process in A. A
pipe doesn't help here, because
io.popen("xterm -e B")
reads the output of xterm (which is always empty), while the output of B
goes into nirwana.
In bash (I'm on Linux, as you may have guessed) I would do this:
result=$(xterm -e "B >&3" 3>&1)
but it seems that an equivalent trick is not possible in Lua. I can of
course use a temporary file, but I wonder if there is a more elegant way
in Lua?
Bernd
--
Bernd Eggink
http://sudrala.de