I remember vaguely a technique using pipes for communication between two shell processes.
Are there any tutorials available on how to setup and control a subshell?
+1
A:
Did you take a look at the Advanced Bash Scripting guide?
There's an entire chapter about - surprise surprise - subshells.
sm
2010-07-21 11:59:14
@sm - thanks I knows this guide, but my problem is rather how to communicate between the processes
stacker
2010-07-21 12:16:48
Sorry mate, I didn't read your question carefully enough.How about this http://www.linuxjournal.com/content/using-named-pipes-fifos-bash ?
sm
2010-07-21 12:36:28
@sm that was exactly what I was looking for, thanks.
stacker
2010-07-21 16:57:46
+1
A:
This should get you going, examples are in C, but the same technique applies to bash. Just do a search for named pipes, in google or here, alot of examples specific to bash pops up.
Anders
2010-07-21 12:20:59
+2
A:
Are you talking about named pipes?
mkfifo pipe
ls -l >pipe #type this is one shell
cat <pipe #type this is another one
No one reads if no one writes.
No one writes if no one reads.
Alberto Zaccagni
2010-07-21 12:31:55
[Here's another reference](http://mywiki.wooledge.org/NamedPipes).
Dennis Williamson
2010-07-21 14:00:49
+1
A:
I think you want coprocesses. In bash 4 there is a new builtin "coproc".
See here for examples:
jim mcnamara
2010-07-21 14:19:19