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Aug 3, 2011, 8:28 AM
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[perl #96212] Swapping of $< and $> should be deprecated
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# New Ticket Created by Leon Timmermans
# Please include the string: [perl #96212]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=96212 >
This is a bug report for perl from fawaka [at] gmail,
generated with the help of perlbug 1.39 running under perl 5.14.1.
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Perl has supported the idiom of swapping $< and $> (and likewise $( and $)) since 5.0. However, there are some issues with this.
* Most of al, it's useless. Unless you're running an early 90s BSD (that lacks a saved UID), there's no reason whatsoever to use this trick. You can just set $> to $< and then set it back to its previous value.
* It needlessly makes UID management and list assignment/nextstate more complicated (see also RT#96208).
* It may lead to subtle issues on some platforms in matters that depend on the real UID (such as signalling).
-----------------------------------------------------------------
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Flags:
category=core
severity=low
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Site configuration information for perl 5.14.1:
Configured by leon at Tue Jun 28 15:59:52 CEST 2011.
Summary of my perl5 (revision 5 version 14 subversion 1) configuration:
Platform:
osname=linux, osvers=2.6.38-8-generic, archname=x86_64-linux
uname='linux leon-laptop 2.6.38-8-generic #42-ubuntu smp mon apr 11 03:31:24 utc 2011 x86_64 x86_64 x86_64 gnulinux '
config_args='-de -Dprefix=/home/leon/perl5/perlbrew/perls/perl-5.14.1'
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='4.6.1 20110409 (prerelease)', 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 /usr/lib /usr/lib/x86_64-linux-gnu /lib64 /usr/lib64
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:
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@INC for perl 5.14.1:
/home/leon/perl5/perlbrew/perls/perl-5.14.1/lib/site_perl/5.14.1/x86_64-linux
/home/leon/perl5/perlbrew/perls/perl-5.14.1/lib/site_perl/5.14.1
/home/leon/perl5/perlbrew/perls/perl-5.14.1/lib/5.14.1/x86_64-linux
/home/leon/perl5/perlbrew/perls/perl-5.14.1/lib/5.14.1
.
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Environment for perl 5.14.1:
HOME=/home/leon
LANG=en_US.utf8
LANGUAGE=en_US:en
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/home/leon/perl5/perlbrew/bin:/home/leon/perl5/perlbrew/perls/perl-5.14.1/bin:/home/leon/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
PERLBREW_HOME=/home/leon/.perlbrew
PERLBREW_PATH=/home/leon/perl5/perlbrew/bin:/home/leon/perl5/perlbrew/perls/perl-5.14.1/bin
PERLBREW_PERL=perl-5.14.1
PERLBREW_ROOT=/home/leon/perl5/perlbrew
PERLBREW_VERSION=0.25
PERL_BADLANG (unset)
SHELL=/bin/bash
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