Bugtraq mailing list archives
Re: vlock + magic SysRQ key
From: tim () NIGHT-SHADE DEMON CO UK (Tim Fletcher)
Date: Fri, 20 Aug 1999 01:42:35 +0100
Following an email exchange with the Slackware maintainer Patrick J. Volkerding <volkerdi () slackware com> he put the Magic SysRq in all the prebuilt kernels shipped with slackware 4.0. I guess this was a bad idea on my part. I would still like to see Magic SysRq in install disk kernels as it helps to debug installs that die. Also I note from the 2.2.11 changelog that Magic SysRq can be runtime enabled / disabled Thou the kernel src tree from Slackware 4.0 is pristene 2.2.6, so any home make kernels will have the SysRq turned off by default <Snip>
CONFIG_MAGIC_SYSRQ is enabled by default in the 2.2.5 kernel which is shipped with RedHat-6.0: viper:/usr/src/linux-2.2.5% grep SYSRQ arch/i386/defconfig .config arch/i386/defconfig:CONFIG_MAGIC_SYSRQ=y .config:CONFIG_MAGIC_SYSRQ=y viper:/usr/src/linux-2.2.5% uname -a Linux some.inet.address 2.2.5-15 #1 Mon Apr 19 22:21:09 EDT 1999 i586 unknown In 2.2.5-22 kernel (the last version in updates/) arch/i386/defconfig has CONFIG_MAGIC_SYSRQ also enabled. The most interesting is that standard kernel distribution (linux-2.2.5.tar.gz) doesn't have SYSRQ enabled -- it was set to "y" by RedHat (probably during beta-testing), and is "y" for all architectures. So, those who use RedHat don't even have to say "Y" and decide if they are hackers or not -- the decision was made for them beforehand ;-).
-- Tim Fletcher .~. /V\ L I N U X tjdf () st-andrews ac uk // \ >Don't fear the penguin< tim () night-shade demon co uk /( )\ ^^-^^ Organic chemistry is the chemistry of carbon compounds. Biochemistry is the study of carbon compounds that crawl. -- Mike Adams
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