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fileno() fails to return descriptor of dirhandle #10654

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p5pRT opened this issue Sep 22, 2010 · 5 comments
Closed

fileno() fails to return descriptor of dirhandle #10654

p5pRT opened this issue Sep 22, 2010 · 5 comments
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distro-Linux type-core

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@p5pRT
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p5pRT commented Sep 22, 2010

Migrated from rt.perl.org#77990 (status was 'resolved')

Searchable as RT77990$
@p5pRT
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p5pRT commented Sep 22, 2010

From @mjdominus

Created by @mjdominus

% perl -wle 'opendir $d, "." or die; print "$d>>", fileno $d'
Use of uninitialized value in print at -e line 1.
GLOB(0x8f99880)>>

Perl doesn't provide any way to call the POSIX 'fsync' function on a
directory. If I could get the file descriptor, I could pass it to
POSIX​::fsync, or even use syscall(), but fileno is broken.

Perl Info 

Flags:
    category=core
    severity=high

Site configuration information for perl 5.10.0:

Configured by Debian Project at Thu Oct  1 22:38:45 UTC 2009.

Summary of my perl5 (revision 5 version 10 subversion 0) configuration:
  Platform:
    osname=linux, osvers=2.6.24-23-server, archname=i486-linux-gnu-thread-multi
    uname='linux vernadsky 2.6.24-23-server #1 smp wed apr 1 22:22:14 utc 2009 i686 gnulinux '
    config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN -Dcccdlflags=-fPIC -Darchname=i486-linux-gnu -Dprefix=/usr -Dprivlib=/usr/share/perl/5.10 -Darchlib=/usr/lib/perl/5.10 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.10.0 -Dsitearch=/usr/local/lib/perl/5.10.0 -Dman1dir=/usr/share/man/man1 -Dman3dir=/usr/share/man/man3 -Dsiteman1dir=/usr/local/man/man1 -Dsiteman3dir=/usr/local/man/man3 -Dman1ext=1 -Dman3ext=3perl -Dpager=/usr/bin/sensible-pager -Uafs -Ud_csh -Ud_ualarm -Uusesfio -Uusenm -DDEBUGGING=-g -Doptimize=-O2 -Duseshrplib -Dlibperl=libperl.so.5.10.0 -Dd_dosuid -des'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=define, usemultiplicity=define
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=undef, use64bitall=undef, uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBIAN -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 -fno-strict-aliasing -pipe -I/usr/local/include'
    ccversion='', gccversion='4.4.1', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='cc', ldflags =' -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-2.10.1.so, so=so, useshrplib=true, libperl=libperl.so.5.10.0
    gnulibc_version='2.10.1'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -O2 -g -L/usr/local/lib'

Locally applied patches:
    


@INC for perl 5.10.0:
    /etc/perl
    /usr/local/lib/perl/5.10.0
    /usr/local/share/perl/5.10.0
    /usr/lib/perl5
    /usr/share/perl5
    /usr/lib/perl/5.10
    /usr/share/perl/5.10
    /usr/local/lib/site_perl
    .


Environment for perl 5.10.0:
    HOME=/home/mjd
    LANG=en_US.UTF-8
    LANGUAGE (unset)
    LD_LIBRARY_PATH=/lib:/usr/lib:/usr/X11R6/lib
    LOGDIR (unset)
    PATH=/home/mjd/bin:/home/mjd/misc/blog/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/usr/games:/sbin:/usr/sbin:/usr/local/bin/X11R6:/usr/local/bin/mh:/data/mysql/bin:/usr/local/bin/pbm:/usr/local/bin/ezmlm:/home/mjd/TPI/bin:/usr/local/teTeX/bin:/usr/local/mysql/bin
    PERL_BADLANG (unset)
    SHELL=/bin/bash

@p5pRT
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p5pRT commented Sep 26, 2010

From ambrus@math.bme.hu

Perl doesn't provide any way to call the POSIX 'fsync' function on a
directory. If I could get the file descriptor, I could pass it to
POSIX​::fsync, or even use syscall(), but fileno is broken.

In this case it would also be nice if calling the sync method (if
IO​::Dir is loaded) worked too.

@p5pRT
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p5pRT commented Sep 26, 2010

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

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p5pRT commented Mar 29, 2016

From @rjbs

~$ perl -wle 'opendir $d, "." or die; print "$d>>", fileno $d'
GLOB(0x7fc531004e68)>>3

This was fixed in perl5.22.0

--
rjbs

@p5pRT
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p5pRT commented Mar 29, 2016

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

@p5pRT p5pRT closed this as completed Mar 29, 2016
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