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[perl #119623] GDBM_FILE: gdbm_open requires a blocksize to be a power of two
From:
Andy Dougherty
Date:
September 5, 2013 13:47
Subject:
[perl #119623] GDBM_FILE: gdbm_open requires a blocksize to be a power of two
Message ID:
rt-3.6.HEAD-1873-1378388805-803.119623-75-0@perl.org
# New Ticket Created by Andy Dougherty
# Please include the string: [perl #119623]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=119623 >
This is a bug report for perl from doughera@lafayette.edu,
generated with the help of perlbug 1.39 running under perl 5.18.0.
-----------------------------------------------------------------
[Please describe your issue here]
ext/GDBM_File/GDBM_File.xs calls gdbm_open with GDBM_BLOCKSIZE=0.
This instructs gdbm to use the stat block size for the file system.
Unfortunately, gdbm will fail if that stat block size is not a power
of two. See [perl #119537] for some more details.
Maybe if gdbm_open fails with gdbm_error == GDBM_BLOCK_SIZE_ERROR, we
should retry with a 'default' blocksize, something simple like 1024. Or,
perhaps GDBM_File.xs ought to do something like stat(dirname(name)) and
then work out the "closest" power-of-two. (Note, though,that dirname()
may alter "name", so we'd have to first make a copy and then free it.)
[config info below is irrelvant]
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=library
severity=low
module=GDBM_File
---
Site configuration information for perl 5.18.0:
Configured by doughera at Mon May 13 07:10:40 EDT 2013.
Summary of my perl5 (revision 5 version 18 subversion 0) configuration:
Platform:
osname=linux, osvers=3.2.0-4-amd64, archname=x86_64-linux
uname='linux xxx 3.2.0-4-amd64 #1 smp debian 3.2.41-2 x86_64 gnulinux '
config_args='-Dprefix=/opt/perl -Dscriptdir=/opt/perl/bin -des'
hint=recommended, useposix=true, d_sigaction=define
useithreads=undef, usemultiplicity=undef
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2',
cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include'
ccversion='', gccversion='4.7.2', 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=-lnsl -ldl -lm -lcrypt -lutil -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
libc=, so=so, useshrplib=false, libperl=libperl.a
gnulibc_version='2.13'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
cccdlflags='-fPIC', lddlflags='-shared -O2 -L/usr/local/lib -fstack-protector'
Locally applied patches:
RC2
---
@INC for perl 5.18.0:
/opt/perl/lib/site_perl/5.18.0/x86_64-linux
/opt/perl/lib/site_perl/5.18.0
/opt/perl/lib/5.18.0/x86_64-linux
/opt/perl/lib/5.18.0
/opt/perl/lib/site_perl/5.16.2
/opt/perl/lib/site_perl/5.16.0
/opt/perl/lib/site_perl/5.14.2
/opt/perl/lib/site_perl/5.12.3
/opt/perl/lib/site_perl/5.10.1
/opt/perl/lib/site_perl/5.8.9
/opt/perl/lib/site_perl
.
---
Environment for perl 5.18.0:
HOME=/home/doughera
LANG (unset)
LANGUAGE (unset)
LC_CTYPE=en_US.UTF-8
LD_LIBRARY_PATH=/usr/local/lib
LOGDIR (unset)
PATH=/home/doughera/script:/home/doughera/bin:/opt/perl/bin:/opt/dist/bin:/opt/gnuplot/bin:/opt/groff/bin:/usr/local/script:/usr/local/bin:/opt/dist/bin:/bin:/usr/bin:/usr/X11R6/bin:.
PERL_BADLANG (unset)
SHELL=/bin/bash
-
[perl #119623] GDBM_FILE: gdbm_open requires a blocksize to be a power of two
by Andy Dougherty