About bidirectional named pipes (FIFO)

[Michael Haubenwallner]

Hi,

I'm encountering problems with some multi-processing bash script
that boils down to:

$ bash -c '
    rm -f /tmp/testpipe.$$
    trap "rm -f /tmp/testpipe.$$" EXIT
    mkfifo /tmp/testpipe.$$
    exec {fw}<>/tmp/testpipe.$$
    exec {fr}<>/tmp/testpipe.$$
    for x in {1..10}
    do
      (
         trap "echo job $x pid \$BASHPID status \$? done >& $fw" EXIT
         exit $x
      ) &
    done 
    for z in {1..10}
    do
      read -u $fr
      echo $REPLY
    done
    wait
'

Agreed, POSIX does not define behaviour for using '<>' with fifos,
but it works with AIX, *BSD, HP-UX, Interix, Linux, Solaris, ...

Thoughts?
/haubi/