[perl #23366] open FILEHANDLE,MODE,LIST is broken
Balazs Rauznitz
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# <URL: http://rt.perl.org/rt2/Ticket/Display.html?id=23366 >
Looking at 'perldoc -f open' this should work:
perl -e 'open F, "-|", "ls", "-l"'
It does so on 5.8.0, but not on 5.6.0; it craps out saying:
Can't use an undefined value as filehandle reference at -e line 1.
Only reporting this because I've heard that people are working on 5.6.2.
Thanks,
Balazs
This is a bug report for perl from bal...@commissioner.com,
generated with the help of perlbug 1.28 running under perl v5.6.0.
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Flags:
category=core
severity=medium
---
Site configuration information for perl v5.6.0:
Configured by bhcompile at Thu Aug 9 22:47:55 EDT 2001.
Summary of my perl5 (revision 5.0 version 6 subversion 0) configuration:
Platform:
osname=linux, osvers=2.4.6-3.1enterprise, archname=i386-linux
uname='linux stripples.devel.redhat.com 2.4.6-3.1enterprise #1 smp tue jul 24 14:03:17 edt 2001 i686 unknown '
config_args='-des -Doptimize=-O2 -march=i386 -mcpu=i686 -Dcc=gcc -Dcccdlflags=-fPIC -Dinstallprefix=/usr -Dprefix=/usr -Darchname=i386-linux -Dd_dosuid -Dd_semctl_semun -Di_db -Di_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm -Uuselargefiles'
hint=recommended, useposix=true, d_sigaction=define
usethreads=undef use5005threads=undef useithreads=undef usemultiplicity=undef
useperlio=undef d_sfio=undef uselargefiles=undef
use64bitint=undef use64bitall=undef uselongdouble=undef usesocks=undef
Compiler:
cc='gcc', optimize='-O2 -march=i386 -mcpu=i686', gccversion=2.96 20000731 (Red Hat Linux 7.1 2.96-96)
cppflags='-fno-strict-aliasing -I/usr/local/include'
ccflags ='-fno-strict-aliasing -I/usr/local/include'
stdchar='char', d_stdstdio=define, usevfork=false
intsize=4, longsize=4, ptrsize=4, doublesize=8
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=4
alignbytes=4, usemymalloc=n, prototype=define
Linker and Libraries:
ld='gcc', ldflags =' -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib
libs=-lnsl -ldl -lm -lc -lcrypt
libc=/lib/libc-2.2.4.so, so=so, useshrplib=false, libperl=libperl.a
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynamic'
cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'
Locally applied patches:
---
@INC for perl v5.6.0:
/net/balazs/fsrc/media/appslib
/net/balazs/fsrc/core/lib
/net/balazs/fsrc/football/lib
/net/balazs/fsrc/football/appslib
/net/balazs/fsrc/media/appslib
/net/balazs/fsrc/core/lib
/net/balazs/fsrc/media/appslib
/net/balazs/fsrc/core/lib
/net/balazs/fsrc/football/lib
/net/balazs/fsrc/media/appslib
/net/balazs/fsrc/core/lib
/net/balazs/fsrc/football/lib
/net/balazs/fsrc/football/appslib
/net/balazs/fsrc/media/appslib
/net/balazs/fsrc/core/lib
/net/balazs/fsrc/media/appslib
/net/balazs/fsrc/core/lib
/net/balazs/fsrc/football/lib
/net/balazs/fsrc/media/appslib
/net/balazs/fsrc/core/lib
/net/balazs/fsrc/football/lib
/usr/lib/perl5/5.6.0/i386-linux
/usr/lib/perl5/5.6.0
/usr/lib/perl5/site_perl/5.6.0/i386-linux
/usr/lib/perl5/site_perl/5.6.0
/usr/lib/perl5/site_perl
.
---
Environment for perl v5.6.0:
HOME=/net/balazs
LANG=en_US
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/net/balazs/fsrc/core/bin:/net/balazs/fsrc/media/bin:/net/balazs/fsrc/football/bin:/net/sysadm/bin:/net/sysadm:/net/balazs/fsrc/core/bin:/net/balazs/fsrc/media/bin:/net/balazs/fsrc/football/bin:/net/sysadm/bin:/net/sysadm:/bin:/usr/bin:/usr/bin/X11:/usr/local/bin:/usr/bin:/usr/X11R6/bin:.:/net/balazs/bin:/net/sysadm/bin:/usr/local/pkg/bin:/net/balazs/bin:/net/balazs/src/football/bin:/net/balazs/bin:.:/net/balazs/bin:/net/sysadm/bin:/usr/local/pkg/bin:/net/balazs/bin:/net/balazs/src/football/bin:/net/balazs/bin:.:/net/balazs/bin:/net/sysadm/bin:/usr/local/pkg/bin
PERL5LIB=/net/balazs/fsrc/media/appslib:/net/balazs/fsrc/core/lib:/net/balazs/fsrc/football/lib:/net/balazs/fsrc/football/appslib:/net/balazs/fsrc/media/appslib:/net/balazs/fsrc/core/lib:/net/balazs/fsrc/media/appslib:/net/balazs/fsrc/core/lib:/net/balazs/fsrc/football/lib:/net/balazs/fsrc/media/appslib:/net/balazs/fsrc/core/lib:/net/balazs/fsrc/football/lib:/net/balazs/fsrc/football/appslib:/net/balazs/fsrc/media/appslib:/net/balazs/fsrc/core/lib:/net/balazs/fsrc/media/appslib:/net/balazs/fsrc/core/lib:/net/balazs/fsrc/football/lib:/net/balazs/fsrc/media/appslib:/net/balazs/fsrc/core/lib:/net/balazs/fsrc/football/lib:
PERL_BADLANG (unset)
SHELL=/bin/bash
Arthur Bergman
On Monday, August 18, 2003, at 11:31 pm, Balazs Rauznitz (via RT)
wrote:
>
>
> Looking at 'perldoc -f open' this should work:
>
> perl -e 'open F, "-|", "ls", "-l"'
>
> It does so on 5.8.0, but not on 5.6.0; it craps out saying:
>
> Can't use an undefined value as filehandle reference at -e line 1.
>
> Only reporting this because I've heard that people are working on
> 5.6.2.
>
> Thanks,
>
>
I doubt this is going to be fixed in 5.6.2, it is a 5.8.0 feature?
Arthur
Michael G Schwern
> >Looking at 'perldoc -f open' this should work:
> >
> >perl -e 'open F, "-|", "ls", "-l"'
> >
> >It does so on 5.8.0, but not on 5.6.0; it craps out saying:
> >
> >Can't use an undefined value as filehandle reference at -e line 1.
> >
> >Only reporting this because I've heard that people are working on
> >5.6.2.
> >
> >Thanks,
>
> I doubt this is going to be fixed in 5.6.2, it is a 5.8.0 feature?
Its a 5.6.0 feature.
open FILEHANDLE,MODE,LIST
it appears that only works in 5.6.0 if LIST has one element. ie.
open F, "-|", "ls -l"
The new "three arg open". It might be a bug or it might be ambiguous
documentation. Anyhow, its not going to get fixed in 5.6.2. 5.6.2 is
just fixes so it can work with recent compilers. 5.6.3 will address bugs...
whenever it comes out.
--
Michael G Schwern sch...@pobox.com http://www.pobox.com/~schwern/
We don't know. But if we did, we wouldn't tell you.
Nick Ing-Simmons
But only a open-parsing one, not one that _needs_ PerlIO
so it could be back-fitted to 5.6 if someone had that much enthusiasm.
>
>Arthur