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[perl #92728] pragma open handles STDERR improperly
From:
Yunfeng Wang
Date:
June 13, 2011 17:13
Subject:
[perl #92728] pragma open handles STDERR improperly
Message ID:
rt-3.6.HEAD-16080-1307966689-1622.92728-75-0@perl.org
# New Ticket Created by Yunfeng Wang
# Please include the string: [perl #92728]
# in the subject line of all future correspondence about this issue.
# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=92728 >
This is a bug report for perl from Yunfeng Wang <uhuruh@gmail.com>,
generated with the help of perlbug 1.39 running under perl 5.12.3.
-----------------------------------------------------------------
After the default PerlIO layer for STDIN/STDOUT/STDERR been set with
the :std subpragma, a second call to `use open ...' without :std will
undo the settings of STDIN and/or STDOUT, while leave STDERR untouched.
The expected behavior is to treat STDERR the same way as to STDOUT.
Example code:
1. use open ':encoding(UTF-8)', ':std';
2. # the I/O layer of STDIN/STDOUT/STDERR is set to :encoding(UTF-8)
3. use open ':encoding(UTF-8)';
4. # layer :encoding(UTF-8) is dropped for STDOUT, but not for STDERR
Here is a patch to fix this bug:
--- /usr/share/perl/5.12.3/open.pm 2011-05-20 03:02:33.000000000 +0800
+++ open.pm 2011-06-13 19:03:59.000000000 +0800
@@ -100,11 +100,13 @@
}
elsif ($type eq 'OUT') {
_drop_oldenc(*STDOUT, @val);
+ _drop_oldenc(*STDERR, @val);
$out = join(' ', @val);
}
elsif ($type eq 'IO') {
_drop_oldenc(*STDIN, @val);
_drop_oldenc(*STDOUT, @val);
+ _drop_oldenc(*STDERR, @val);
$in = $out = join(' ', @val);
}
else {
-----------------------------------------------------------------
---
Flags:
category=library
severity=low
module=open
---
Site configuration information for perl 5.12.3:
Configured by Debian Project at Thu May 19 18:42:35 UTC 2011.
Summary of my perl5 (revision 5 version 12 subversion 3) configuration:
Derived from:
Platform:
osname=linux, osvers=2.6.32-5-686,
archname=i486-linux-gnu-thread-multi-64int
uname='linux callisto 2.6.32-5-686 #1 smp tue mar 8 21:36:00 utc
2011 i686 gnulinux '
config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN
-Dcccdlflags=-fPIC -Darchname=i486-linux-gnu -Dprefix=/usr
-Dprivlib=/usr/share/perl/5.12 -Darchlib=/usr/lib/perl/5.12
-Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5
-Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local
-Dsitelib=/usr/local/share/perl/5.12.3
-Dsitearch=/usr/local/lib/perl/5.12.3 -Dman1dir=/usr/share/man/man1
-Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1
-Dsiteman3dir=/usr/local/man/man3 -Duse64bitint -Dman1ext=1
-Dman3ext=3perl -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh
-Ud_ualarm -Uusesfio -Uusenm -Ui_libutil -DDEBUGGING=-g -Doptimize=-O2
-Dplibpth=/lib/i386-linux-gnu /usr/lib/i386-linux-gnu -Duseshrplib
-Dlibperl=libperl.so.5.12.3 -des'
hint=recommended, useposix=true, d_sigaction=define
useithreads=define, usemultiplicity=define
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=undef, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN
-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2 -g',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fno-strict-aliasing
-pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.6.1 20110507 (prerelease)', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long long', ivsize=8, nvtype='double', nvsize=8,
Off_t='off_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
libpth=/usr/local/lib /lib /usr/lib /usr/lib64
libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
perllibs=-ldl -lm -lpthread -lc -lcrypt
libc=/lib/libc-2.13.so, so=so, useshrplib=true, libperl=libperl.so.5.12.3
gnulibc_version='2.13'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -g -L/usr/local/lib
-fstack-protector'
Locally applied patches:
DEBPKG:debian/arm_thread_stress_timeout -
http://bugs.debian.org/501970 Raise the timeout of
ext/threads/shared/t/stress.t to accommodate slower build hosts
DEBPKG:debian/cpan_config_path - Set location of CPAN::Config to
/etc/perl as /usr may not be writable.
DEBPKG:debian/cpan_definstalldirs - Provide a sensible INSTALLDIRS
default for modules installed from CPAN.
DEBPKG:debian/db_file_ver - http://bugs.debian.org/340047 Remove
overly restrictive DB_File version check.
DEBPKG:debian/doc_info - Replace generic man(1) instructions with
Debian-specific information.
DEBPKG:debian/enc2xs_inc - http://bugs.debian.org/290336 Tweak
enc2xs to follow symlinks and ignore missing @INC directories.
DEBPKG:debian/errno_ver - http://bugs.debian.org/343351 Remove
Errno version check due to upgrade problems with long-running
processes.
DEBPKG:debian/extutils_hacks - Various debian-specific ExtUtils changes
DEBPKG:debian/fakeroot - Postpone LD_LIBRARY_PATH evaluation to
the binary targets.
DEBPKG:debian/instmodsh_doc - Debian policy doesn't install
.packlist files for core or vendor.
DEBPKG:debian/ld_run_path - Remove standard libs from LD_RUN_PATH
as per Debian policy.
DEBPKG:debian/libnet_config_path - Set location of libnet.cfg to
/etc/perl/Net as /usr may not be writable.
DEBPKG:debian/m68k_thread_stress - http://bugs.debian.org/495826
Disable some threads tests on m68k for now due to missing TLS.
DEBPKG:debian/mod_paths - Tweak @INC ordering for Debian
DEBPKG:debian/module_build_man_extensions -
http://bugs.debian.org/479460 Adjust Module::Build manual page
extensions for the Debian Perl policy
DEBPKG:debian/prune_libs - http://bugs.debian.org/128355 Prune the
list of libraries wanted to what we actually need.
DEBPKG:fixes/net_smtp_docs - http://bugs.debian.org/100195
[rt.cpan.org #36038] Document the Net::SMTP 'Port' option
DEBPKG:fixes/processPL - http://bugs.debian.org/357264
[rt.cpan.org #17224] Always use PERLRUNINST when building perl
modules.
DEBPKG:debian/perlivp - http://bugs.debian.org/510895 Make perlivp
skip include directories in /usr/local
DEBPKG:debian/disable-zlib-bundling - Disable zlib bundling in
Compress::Raw::Zlib
DEBPKG:debian/cpanplus_definstalldirs -
http://bugs.debian.org/533707 Configure CPANPLUS to use the site
directories by default.
DEBPKG:debian/cpanplus_config_path - Save local versions of
CPANPLUS::Config::System into /etc/perl.
DEBPKG:fixes/autodie-flock - http://bugs.debian.org/543731 Allow
for flock returning EAGAIN instead of EWOULDBLOCK on linux/parisc
DEBPKG:debian/devel-ppport-ia64-optim -
http://bugs.debian.org/548943 Work around an ICE on ia64
DEBPKG:fixes/cpanplus-without-home - http://bugs.debian.org/577011
[rt.cpan.org #52988] Fix CPANPLUS test failures when HOME doesn't
exist
DEBPKG:debian/arm_optim - http://bugs.debian.org/580334 Downgrade
the optimization of sv.c on arm due to a gcc-4.4 bug
DEBPKG:debian/deprecate-with-apt - http://bugs.debian.org/580034
Point users to Debian packages of deprecated core modules
DEBPKG:fixes/hurd-ccflags - http://bugs.debian.org/587901 Make
hints/gnu.sh append to $ccflags rather than overriding them
DEBPKG:debian/squelch-locale-warnings -
http://bugs.debian.org/508764 Squelch locale warnings in Debian
package maintainer scripts
DEBPKG:fixes/lc-numeric-docs - http://bugs.debian.org/379329 [perl
#78452] [903eb63] LC_NUMERIC documentation fixes
DEBPKG:fixes/lc-numeric-sprintf - http://bugs.debian.org/601549
[perl #78632] [b3fd614] Fix sprintf not to ignore LC_NUMERIC with
constants
DEBPKG:fixes/concat-stack-corruption -
http://bugs.debian.org/596105 [perl #78674] [e3393f5] Fix stack
pointer corruption in pp_concat() with 'use encoding'
DEBPKG:fixes/h2ph-gcc-4.5 - http://bugs.debian.org/599933
[8d66b3f] h2ph fix for gcc 4.5
DEBPKG:fixes/casing-taint-cve-2011-1487 -
http://bugs.debian.org/622817 [perl #87336] fix unwanted taint
laundering in lc(), uc() et al.
DEBPKG:fixes/correct-module-corelist-version - [a0a0e54] Correct
the version of Module::CoreList that was released with v5.12.3
DEBPKG:fixes/module-build-home-directory -
http://bugs.debian.org/624850 [rt.cpan.org #67893] Fix failing tilde
test when run under a UID without a passwd entry
DEBPKG:patchlevel - http://bugs.debian.org/567489 List packaged
patches for 5.12.3-7 in patchlevel.h
---
@INC for perl 5.12.3:
/etc/perl
/usr/local/lib/perl/5.12.3
/usr/local/share/perl/5.12.3
/usr/lib/perl5
/usr/share/perl5
/usr/lib/perl/5.12
/usr/share/perl/5.12
/usr/local/lib/site_perl
.
---
Environment for perl 5.12.3:
HOME=/home/yfwang
LANG=zh_CN.UTF-8
LANGUAGE=zh_CN:zh
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/yfwang/bin:/usr/local/bin:/usr/bin:/bin:/usr/games
PERL_BADLANG (unset)
SHELL=/bin/bash
-
[perl #92728] pragma open handles STDERR improperly
by Yunfeng Wang