On Mon, Oct 12, 2009 at 1:14 PM, Ralf Goertz <r_goe...@usenet.arcornews.de>wrote:
> Hi, > > is it possible to have a process substitution with both input and output > redirection? So far I use the following work-around > > > cat parentprocess.sh: > #!/bin/bash > mkfifo fifo 2>/dev/null > exec 5> >(./subprocess.sh > fifo) > exec 6< <(cat < fifo) > echo input to subprocess 1>&5 > echo done sending input > sleep 1 > while read -u 6 ; do > echo parent process read: $REPLY > done > exec 5>&- > echo about to exit parent process rm fifo > > > cat subprocess.sh: > #!/bin/bash > echo subprocess start > read > sleep 1 > echo read: $REPLY > echo subprocess end > > > > Is there another way to do that, something like fork, which wouldn't use > a named pipe explicitely? > in bash4 you can use a coproc, see: http://bash-hackers.org/wiki/doku.php/syntax/keywords/coproc
