57 lines
2.2 KiB
Text
57 lines
2.2 KiB
Text
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[[!meta title="Ubuntu and Debian skip fsck on battery - a bug"]]
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Everytime I go through the init scripts or init configurations
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of the "traditional" (as in having a sequential order and/or
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using shell scripts) init systems, there are interesting things to find:
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Not only that probably half of the boottime could be saved if people
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move the "if system has x, do y" stuff out of the init system and make
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it part of the configuration process, no.
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There are also a lot of other interesting quirks within the init configuration,
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like this one:
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on_ac_power >/dev/null 2>&1
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if [ "$?" -eq 1 ]
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then
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log_warning_msg "On battery power, so skipping file system check."
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rootcheck=no
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fi
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That part is shameless stolen from ***S20checkroot.sh***,
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Ubuntu Jaunty (9.04), but it can also be found in Debian.
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So if the system is running on battery, this configuration will skip
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the filesystem check.
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Now imagine your filesystem **needs** to be checked, because the
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user space program ***fsck*** replays the journal and marks the
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filesystem as clean. Furthermore, assume that without this filesystem
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check the filesystem cannot be mounted read write.
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That is exactly what is done by ***fsck.jfs***, the filesystem check
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for JFS filesystems.
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So if you are running Debian or Ubuntu with JFS on the root filesystem,
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your system crashed the last time and you bootup on battery the bootup
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process will fail, because the root filesystem cannot be mounted
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read write.
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Perhaps the authors idea of these lines was to skip senseless
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filesystem checks for ext{2,3,4}, which occur after a certain
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amount of time. But as it can be seen, this "fix" introduced
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a new bug.
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Dear Debian and Ubuntu developers:
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Please do not skip the filesystem check.
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All the users with JFS on / of their notebook will thank you!
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I would have fixed that in Debian myself, if there was a
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"get a fix integrated in 5 minutes" approach.
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But after reading Debian documentation for some hours I did not find it.
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If you find that way [[let me know|about]] and I'll write an article
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"How to fix a Debian package in 5 minutes" plus provide a patch
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to solve this init misconfiguration issue.
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[[!tag unix]]
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