IPC::Open2 under mod_perl in Mac OS X

[John Siracusa]

(I'm not sure if this is a mod_perl thing of a Mac OS X bug, so I'm posting
it to both lists.  Redirect follow-ups as appropriate.)

open2() doesn't seem to work for me when running under mod_perl in Mac OS X.
Here's the test case:

In /usr/local/bin/upcase

    #!/usr/bin/perl
    $buf .= $_ while(<STDIN>);
    print uc $buf;

Example usage from the command line:

    % echo hello | upcase
    HELLO

Now here's the CGI script that uses open2() to talk to the upcase program:

    #!/usr/bin/perl
    use strict;
    use CGI qw(:standard);
    use IPC::Open2;

    open2(\*READ, \*WRITE, '/usr/local/bin/upcase');

    print WRITE "Hello";
    close(WRITE);

    my $res;
    $res .= $_  while(<READ>);
    close(READ);

    print header(), "Got: $res"

Running it under plain CGI shows the expected output:

    Got: HELLO

But running it under Apache::PerlRun or Apache::Registry shows:

    Got:

Any ideas?  (Some more verbose configuration information is included below.)

-John

% perl -V
Summary of my perl5 (revision 5.0 version 6 subversion 1) configuration:
  Platform:
    osname=darwin, osvers=1.4, archname=darwin
    uname='darwin localhost 1.4 darwin kernel version 1.4: sun sep 9
15:39:59 pdt 2001; root:xnuxnu-201.obj~1release_ppc power macintosh powerpc
'
    config_args='-des -Dfirstmakefile=GNUmakefile -Dldflags=-flat_namespace'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=undef use5005threads=undef useithreads=undef
usemultiplicity=undef
    useperlio=undef d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
  Compiler:
    cc='cc', ccflags ='-pipe -fno-common -DHAS_TELLDIR_PROTOTYPE
-fno-strict-aliasing -I/usr/local/include',
    optimize='-O3',
    cppflags='-pipe -fno-common -DHAS_TELLDIR_PROTOTYPE -fno-strict-aliasing
-I/usr/local/include'
    ccversion='', gccversion='Apple devkit-based CPP 6.0', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=4321
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=8
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
    alignbytes=8, usemymalloc=n, prototype=define
  Linker and Libraries:
    ld='cc', ldflags ='-flat_namespace -L/usr/local/lib'
    libpth=/usr/local/lib /usr/lib
    libs=-lm -lc
    perllibs=-lm -lc
    libc=/System/Library/Frameworks/System.framework/System, so=dylib,
useshrplib=true, libperl=libperl.dylib
  Dynamic Linking:
    dlsrc=dl_dyld.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
    cccdlflags=' ', lddlflags='-flat_namespace -bundle -undefined suppress
-L/usr/local/lib'


Characteristics of this binary (from libperl):
  Compile-time options: USE_LARGE_FILES
  Built under darwin
  Compiled at 01/26/02 17:02:40
  %ENV:
    PERL_READLINE_NOWARN=""
  @INC:
    /System/Library/Perl/darwin
    /System/Library/Perl
    /Library/Perl/darwin
    /Library/Perl
    /Library/Perl
    /Network/Library/Perl/darwin
    /Network/Library/Perl
    /Network/Library/Perl
    .

% uname -a
Darwin xxx.com 5.5 Darwin Kernel Version 5.5: Thu May 30 14:51:26 PDT 2002;
root:xnu/xnu-201.42.3.obj~1/RELEASE_PPC  Power Macintosh powerpc


Apache/1.3.23 (Darwin) mod_perl/1.26
(I've also tried this with apache 1.3.26 and got the same results)

% httpd -V
Server version: Apache/1.3.23 (Darwin)
Server built:   02/16/02 15:51:05
Server's Module Magic Number: 19990320:11
Server compiled with....
 -D HAVE_MMAP
 -D USE_MMAP_SCOREBOARD
 -D USE_MMAP_FILES
 -D HAVE_FCNTL_SERIALIZED_ACCEPT
 -D HAVE_FLOCK_SERIALIZED_ACCEPT
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D HTTPD_ROOT="/usr/local/apache"
 -D SUEXEC_BIN="/usr/local/apache/bin/suexec"
 -D DEFAULT_PIDLOG="logs/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/httpd.scoreboard"
 -D DEFAULT_LOCKFILE="logs/httpd.lock"
 -D DEFAULT_XFERLOG="logs/access_log"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D TYPES_CONFIG_FILE="conf/mime.types"
 -D SERVER_CONFIG_FILE="conf/httpd.conf"
 -D ACCESS_CONFIG_FILE="conf/access.conf"
 -D RESOURCE_CONFIG_FILE="conf/srm.conf"

% httpd -l
Compiled-in modules:
  http_core.c
  mod_env.c
  mod_log_config.c
  mod_mime.c
  mod_negotiation.c
  mod_status.c
  mod_include.c
  mod_autoindex.c
  mod_dir.c
  mod_cgi.c
  mod_asis.c
  mod_imap.c
  mod_actions.c
  mod_userdir.c
  mod_alias.c
  mod_access.c
  mod_auth.c
  mod_setenvif.c
  mod_perl.c
suexec: disabled; invalid wrapper /usr/local/apache/bin/suexec