Raymond Roesch writes:
> # open( PIPE1, "+>$fname") || die "Could not open the named pipe -
> $!!\n";
> # will print error:
> # Could not open the named pipe - Bad file number!
>
> # open( PIPE2, ">$fname") || die "Could not open the named pipe -
> $!!\n";
> # program hangs

Fails as documented under Perl 5.004_01 too.

A stack trace of the PIPE2 hang case shows you are stuck inside HPFOPEN, so
I suspect you've discovered a new POSIX smoothing issue.  I recommend opening
a call with the HP Response Center.

       PC=a.0017f70c enable_int+$2c
NM* 0) SP=4183b438 RP=a.00f4369c notify_dispatcher.block_current_process+$324
NM  1) SP=4183b438 RP=a.00f45b48 notify_dispatcher+$264
NM  2) SP=4183b3b8 RP=a.00392418 ipc_impede+$274
NM  3) SP=4183b2b8 RP=a.00392190 ?ipc_impede+$8
         export stub: a.01dfac3c mpe_sleep+$24
NM  4) SP=4183b178 RP=a.01dddadc streams_tm+$1298
NM  5) SP=4183b138 RP=a.01ddc3d8 ?streams_tm+$8
         export stub: a.010de940 open_old.call_type_manager+$6c4
NM  6) SP=4183ae78 RP=a.010dff98 open_old+$c10
NM  7) SP=4183ad78 RP=a.010bd2e0 HPFOPEN+$43c
NM  8) SP=4183ab78 RP=a.00ea6028 ?HPFOPEN+$8
         export stub: 171.0015a30c _px_hpfopen+$894
NM  9) SP=41839b78 RP=171.00157764 _px_open+$2c
NM  a) SP=418393f8 RP=171.00157724 ?_px_open+$8
--
Mark Bixby                      E-mail: [log in to unmask]
Coast Community College Dist.   Web: http://www.cccd.edu/~markb/
District Information Services   1370 Adams Ave, Costa Mesa, CA, USA 92626-5429
Technical Support               +1 714 438-4647
"You can tune a file system, but you can't tune a fish." - tunefs(1M)