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File::Find issue with link counts on Bash on Ubuntu on Windows #15627

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p5pRT opened this issue Sep 24, 2016 · 5 comments
Closed

File::Find issue with link counts on Bash on Ubuntu on Windows #15627

p5pRT opened this issue Sep 24, 2016 · 5 comments
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distro-Linux type-library

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@p5pRT
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p5pRT commented Sep 24, 2016

Migrated from rt.perl.org#129348 (status was 'resolved')

Searchable as RT129348$
@p5pRT
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p5pRT commented Sep 24, 2016

From michiel.beijen@gmail.com

Created by michiel.beijen@gmail.com

This is a bug report for perl from michiel.beijen@​gmail.com,
generated with the help of perlbug 1.39 running under perl 5.18.2.

-----------------------------------------------------------------
The product Bash on Ubuntu on Windows provides a way to run Linux
software on a Windows kernel without virtualization. See​:

https://msdn.microsoft.com/en-us/commandline/wsl/about

It uses Ubuntu 14.04 with a modified kernel.

Its filesystem does not handle link counts correctly, and perl is
not able to detect that itself.
This means that File​::Find will not be able to traverse directories
properly and you'll not be able to install perl modules on the system
perl.

A workaround for that is
sed -ri 's/dont_use_nlink => .*?,$/dont_use_nlink => 1,/'
/usr/lib/perl/5.18.2/Config.pm

Also, you'll not be able to install a new perl on this system
without enabling the configuration option 'dont_use_nlink'.

ref​:
http​://www.nntp.perl.org/group/perl.perl5.porters/2016/09/msg239937.html

Ideally, perl's configure script should be able to detect if it can
use nlink or not automatically.
--
Michiel

Perl Info 

Flags:
    category=library
    severity=low
    module=File::Find

Site configuration information for perl 5.18.2:
Configured by Debian Project at Tue Mar  1 17:12:59 UTC 2016.
Summary of my perl5 (revision 5 version 18 subversion 2) configuration:

  Platform:
    osname=linux, osvers=3.13.0-79-generic,
archname=x86_64-linux-gnu-thread-multi
    uname='linux lgw01-37 3.13.0-79-generic #123-ubuntu smp fri feb 19
14:27:58 utc 2016 x86_64 x86_64 x86_64 gnulinux '
    config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN
-D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4
-Wformat -Werror=format-security -Dldflags= -Wl,-Bsymbolic-functions
-Wl,-z,relro -Dlddlflags=-shared -Wl,-Bsymbolic-functions -Wl,-z,relro
-Dcccdlflags=-fPIC -Darchname=x86_64-linux-gnu -Dprefix=/usr
-Dprivlib=/usr/share/perl/5.18 -Darchlib=/usr/lib/perl/5.18
-Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5
-Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local
-Dsitelib=/usr/local/share/perl/5.18.2
-Dsitearch=/usr/local/lib/perl/5.18.2 -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 -Uversiononly -DDEBUGGING=-g
-Doptimize=-O2 -Duseshrplib -Dlibperl=libperl.so.5.18.2 -des'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=define, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN
-fstack-protector -fno-strict-aliasing -pipe -I/usr/local/include
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O2 -g',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fstack-protector
-fno-strict-aliasing -pipe -I/usr/local/include'
    ccversion='', gccversion='4.8.2', gccosandvers=''
    intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
    ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t',
lseeksize=8
    alignbytes=8, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -fstack-protector -L/usr/local/lib'
    libpth=/usr/local/lib /lib/x86_64-linux-gnu /lib/../lib
/usr/lib/x86_64-linux-gnu /usr/lib/../lib /lib /usr/lib
    libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt
    perllibs=-ldl -lm -lpthread -lc -lcrypt
    libc=, so=so, useshrplib=true, libperl=libperl.so.5.18.2
    gnulibc_version='2.19'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib -fstack-protector'
Locally applied patches:
    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/libperl_embed_doc - http://bugs.debian.org/186778
Note that libperl-dev package is required for embedded linking
    DEBPKG:fixes/respect_umask - Respect umask during installation
    DEBPKG:debian/writable_site_dirs - Set umask approproately for
site install directories
    DEBPKG:debian/extutils_set_libperl_path - EU:MM: Set location of
libperl.a to /usr/lib
    DEBPKG:debian/no_packlist_perllocal - Don't install .packlist or
perllocal.pod for perl or vendor
    DEBPKG:debian/prefix_changes - Fiddle with *PREFIX and variables
written to the makefile
    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/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 - [rt.cpan.org #36038]
http://bugs.debian.org/100195 Document the Net::SMTP 'Port' option
    DEBPKG:debian/perlivp - http://bugs.debian.org/510895 Make perlivp
skip include directories in /usr/local
    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:debian/deprecate-with-apt - http://bugs.debian.org/702096
Point users to Debian packages of deprecated core modules
    DEBPKG:debian/squelch-locale-warnings -
http://bugs.debian.org/508764 Squelch locale warnings in Debian
package maintainer scripts
    DEBPKG:debian/skip-upstream-git-tests - Skip tests specific to the
upstream Git repository
    DEBPKG:debian/patchlevel - http://bugs.debian.org/567489 List
packaged patches for 5.18.2-2ubuntu1.1 in patchlevel.h
    DEBPKG:debian/skip-kfreebsd-crash - http://bugs.debian.org/628493
[perl #96272] Skip a crashing test case in t/op/threads.t on
GNU/kFreeBSD
    DEBPKG:fixes/document_makemaker_ccflags -
http://bugs.debian.org/628522 [rt.cpan.org #68613] Document that
CCFLAGS should include $Config{ccflags}
    DEBPKG:debian/find_html2text - http://bugs.debian.org/640479
Configure CPAN::Distribution with correct name of html2text
    DEBPKG:debian/hurd_test_skip_stack - http://bugs.debian.org/650175
Disable failing GNU/Hurd tests dist/threads/t/stack.t
    DEBPKG:fixes/manpage_name_Test-Harness -
http://bugs.debian.org/650451 [rt.cpan.org #73399] cpan/Test-Harness:
add NAME headings in modules with POD
    DEBPKG:debian/makemaker-pasthru - http://bugs.debian.org/660195
[rt.cpan.org #28632] Make EU::MM pass LD through to recursive
Makefile.PL invocations
    DEBPKG:debian/perl5db-x-terminal-emulator.patch -
http://bugs.debian.org/668490 Invoke x-terminal-emulator rather than
xterm in perl5db.pl
    DEBPKG:debian/cpan-missing-site-dirs -
http://bugs.debian.org/688842 Fix CPAN::FirstTime defaults with
nonexisting site dirs if a parent is writable
    DEBPKG:fixes/memoize_storable_nstore - [rt.cpan.org #77790]
http://bugs.debian.org/587650 Memoize::Storable: respect 'nstore'
option not respected
    DEBPKG:fixes/net_ftp_failed_command - [rt.cpan.org #37700]
http://bugs.debian.org/491062 Net::FTP: cope gracefully with a failed
command
    DEBPKG:fixes/perlbug-patchlist - [3541c11]
http://bugs.debian.org/710842 [perl #118433] Make perlbug look up the
list of local patches at run time
    DEBPKG:fixes/module_metadata_security_doc - [68cdd4b]
CVE-2013-1437 documentation fix
    DEBPKG:fixes/module_metadata_taint_fix - [bff978f]
http://bugs.debian.org/722210 [rt.cpan.org #88576] untaint version, if
needed, in Module::Metadata
    DEBPKG:fixes/IPC-SysV-spelling - http://bugs.debian.org/730558
[rt.cpan.org #86736] Fix spelling of IPC_CREAT in IPC-SysV
documentation
    DEBPKG:fixes/fix-undef-source -
    DEBPKG:fixes/CVE-2013-7422.patch - [PATCH] [perl #119505] Segfault
from bad backreference
    DEBPKG:fixes/CVE-2014-4330.patch - [PATCH] don't recurse
infinitely in Data::Dumper
    DEBPKG:fixes/CVE-2016-2381.patch - [PATCH 1/2] remove duplicate
environment variables from environ

@INC for perl 5.18.2:
    /etc/perl
    /usr/local/lib/perl/5.18.2
    /usr/local/share/perl/5.18.2
    /usr/lib/perl5
    /usr/share/perl5
    /usr/lib/perl/5.18
    /usr/share/perl/5.18
    /usr/local/lib/site_perl
    .

Environment for perl 5.18.2:
    HOME=/home/michiel
    LANG=en_US.UTF-8
    LANGUAGE (unset)
    LD_LIBRARY_PATH (unset)
    LOGDIR (unset)
    PATH=/home/michiel/perl5/perlbrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
    PERLBREW_BASHRC_VERSION=0.66
    PERLBREW_HOME=/home/michiel/.perlbrew
    PERLBREW_ROOT=/home/michiel/perl5/perlbrew
    PERL_BADLANG (unset)
    SHELL=/bin/bash

@p5pRT
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p5pRT commented Dec 31, 2016

From @jkeenan

On Sat, 24 Sep 2016 14​:55​:10 GMT, michiel.beijen@​gmail.com wrote​:

This is a bug report for perl from michiel.beijen@​gmail.com,
generated with the help of perlbug 1.39 running under perl 5.18.2.

-----------------------------------------------------------------
The product Bash on Ubuntu on Windows provides a way to run Linux
software on a Windows kernel without virtualization. See​:

https://msdn.microsoft.com/en-us/commandline/wsl/about

It uses Ubuntu 14.04 with a modified kernel.

Its filesystem does not handle link counts correctly, and perl is
not able to detect that itself.
This means that File​::Find will not be able to traverse directories
properly and you'll not be able to install perl modules on the system
perl.

A workaround for that is
sed -ri 's/dont_use_nlink => .*?,$/dont_use_nlink => 1,/'
/usr/lib/perl/5.18.2/Config.pm

Also, you'll not be able to install a new perl on this system
without enabling the configuration option 'dont_use_nlink'.

ref​:
http​://www.nntp.perl.org/group/perl.perl5.porters/2016/09/msg239937.html

Ideally, perl's configure script should be able to detect if it can
use nlink or not automatically.
--
Michiel

Can anyone familiar with ./Configure let us know whether this request is feasible?

Thank you very much.

--
James E Keenan (jkeenan@​cpan.org)

@p5pRT
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p5pRT commented Dec 31, 2016

The RT System itself - Status changed from 'new' to 'open'

@p5pRT
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p5pRT commented Dec 31, 2016

From @Leont

On Sat, Dec 31, 2016 at 1​:38 AM, James E Keenan via RT <
perlbug-followup@​perl.org> wrote​:

Can anyone familiar with ./Configure let us know whether this request is
feasible?

Thank you very much.

Microsoft already fixed this issue on their end (though I'm not sure it has
landed in their stable release), so this issue can be closed. Configure
would be the wrong place anyway because this is a runtime issue, not a
compile-time issue.

Leon

@p5pRT
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p5pRT commented Dec 31, 2016

@Leont - Status changed from 'open' to 'resolved'

@p5pRT p5pRT closed this as completed Dec 31, 2016
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