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Report information
Id: 43789
Status: resolved
Priority: 0/
Queue: perl5

Owner: Nobody
Requestors: perlbug [at] daveola.com
Cc:
AdminCc:

Operating System: Linux
PatchStatus: (no value)
Severity: medium
Type:
Perl Version: 5.8.8
Fixed In: 5.13.1



Subject: "in memory" files don't call STORE method when tied
Date: Wed, 11 Jul 2007 02:46:26 -0700
To: perlbug [...] perl.org
From: David Ljung Madison <daveMail [...] getdave.com>
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This is a bug report for perl from perlbug@daveola.com, generated with the help of perlbug 1.35 running under perl v5.8.8. ----------------------------------------------------------------- [Please enter your report here] If we open a file handle to an "in memory" file held in a perl scalar, and then tie that scalar, we don't see the STORE method called on writes to the filehandle, though they still work on normal STORE events. Code: #################### { package printHook; sub hook { my $myout; # Redirect EXAMPLE filehandle to the variable. open EXAMPLE,'>',\$myout or die "Can't open EXAMPLE: $!\n"; # And tie the variable to this package tie $myout, "printHook", ""; # Store to the variable directly $myout = "direct store"; print "\$myout is: \"$myout\"\n"; # Store to the variable through the filehandle print EXAMPLE "write to myout variable.."; # We didn't see our STORE method called? print "\$myout is: \"$myout\"\n"; } sub TIESCALAR { my ($pkg) = @_; my $obj = []; bless $obj, $pkg; return $obj; } sub STORE { my ($obj, $val) = @_; print STDERR "Wrote var <- $val\n"; $obj->[0] = $val; return $val; } sub FETCH { return $_[0][0]; } } printHook->hook(); #################### The output is: --- Wrote var <- direct store $myout is: "direct store" $myout is: "write to myout variable.." --- Expected output: --- Wrote var <- direct store $myout is: "direct store" Wrote var <- write to myout variable.. $myout is: "write to myout variable.." --- [Please do not change anything below this line] ----------------------------------------------------------------- --- Flags: category=core severity=medium --- Site configuration information for perl v5.8.8: Configured by Debian Project at Wed Dec 6 23:17:41 UTC 2006. Summary of my perl5 (revision 5 version 8 subversion 8) configuration: Platform: osname=linux, osvers=2.6.18.3, archname=i486-linux-gnu-thread-multi uname='linux saens 2.6.18.3 #1 smp sat nov 25 13:39:52 est 2006 i686 gnulinux ' config_args='-Dusethreads -Duselargefiles -Dccflags=-DDEBIAN -Dcccdlflags=-fPIC -Darchname=i486-linux-gnu -Dprefix=/usr -Dprivlib=/usr/share/perl/5.8 -Darchlib=/usr/lib/perl/5.8 -Dvendorprefix=/usr -Dvendorlib=/usr/share/perl5 -Dvendorarch=/usr/lib/perl5 -Dsiteprefix=/usr/local -Dsitelib=/usr/local/share/perl/5.8.8 -Dsitearch=/usr/local/lib/perl/5.8.8 -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 -Uusesfio -Uusenm -Duseshrplib -Dlibperl=libperl.so.5.8.8 -Dd_dosuid -des' hint=recommended, useposix=true, d_sigaction=define usethreads=define use5005threads=undef 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 -DTHREADS_HAVE_PIDS -DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64', optimize='-O2', cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBIAN -fno-strict-aliasing -pipe -I/usr/local/include' ccversion='', gccversion='4.1.2 20061115 (prerelease) (Debian 4.1.1-20)', 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 libs=-lgdbm -lgdbm_compat -ldb -ldl -lm -lpthread -lc -lcrypt perllibs=-ldl -lm -lpthread -lc -lcrypt libc=/lib/libc-2.3.6.so, so=so, useshrplib=true, libperl=libperl.so.5.8.8 gnulibc_version='2.3.6' Dynamic Linking: dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E' cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib' Locally applied patches: --- @INC for perl v5.8.8: /etc/perl /usr/local/lib/perl/5.8.8 /usr/local/share/perl/5.8.8 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl /usr/local/lib/perl/5.8.4 /usr/local/share/perl/5.8.4 . --- Environment for perl v5.8.8: HOME=/home/dave LANG=C LANGUAGE (unset) LD_LIBRARY_PATH (unset) LOGDIR (unset) PATH=.:/home/dave/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games:/usr/X11R6/bin:/sbin:/usr/sbin:/usr/local/sbin:/WWW/web/MarginalHacks.com/bin PERL_BADLANG (unset) SHELL=/usr/bin/tcsh
Now fixed in blead by commit ffe0bb5ab7ece4bcdcb968ad795cd58d265b845b


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