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Add boot/shutdown script customization instructions
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10016 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
This commit is contained in:
Bruce Dubbs
parent
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commit
12574f2c42
@ -1,3 +1,9 @@
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2012-10-13 Bruce Dubbs <bdubbs@linuxfromscratch.org>
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* Remove unneeded sleep in killproc
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* Add option for verbose fsck
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* Flatten directory structure of tarball
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* Remove /fastboot or /forcecheck if set
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2012-09-05 Bruce Dubbs <bdubbs@linuxfromscratch.org>
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* Add udevadm trigger --action=change line to udev script
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to support initramfs better
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@ -46,6 +46,7 @@ case "${1}" in
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msg="/fastboot found, will omit "
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msg="${msg} file system checks as requested.\n"
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log_info_msg "${msg}"
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rm /fastboot
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exit 0
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fi
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@ -73,13 +74,20 @@ case "${1}" in
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msg="${msg} system checks as requested."
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log_success_msg "$msg"
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options="-f"
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rm /forcefsck
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else
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options=""
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fi
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log_info_msg "Checking file systems..."
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# Note: -a option used to be -p; but this fails e.g. on fsck.minix
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if is_true "$VERBOSE_FSCK"; then
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fsck ${options} -a -A -C -T
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else
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fsck ${options} -a -A -C -T >/dev/null
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fi
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error_value=${?}
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if [ "${error_value}" = 0 ]; then
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@ -344,10 +344,6 @@ killproc()
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sleep 1
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# Check again, and fail if still running
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kill -0 "${pid}" 2> /dev/null && return 1
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else
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# just check one last time and if still alive, fail
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sleep 1
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kill -0 "${pid}" 2> /dev/null && return 1
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fi
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fi
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done
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@ -50,8 +50,20 @@
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# Skip reading from the console
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#HEADLESS=yes
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# Skip cleaning /tmp
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#SKIPTMPCLEAN=yes
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# Speed up boot without waiting for settle in udev_retry
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#OMIT_UDEV_RETRY_SETTLE=yes
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# Write out fsck progress if yes
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#VERBOSE_FSCK=no
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# Speed up boot without waiting for settle in udev
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#OMIT_UDEV_SETTLE=y
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# Speed up boot without waiting for settle in udev_retry
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#OMIT_UDEV_RETRY_SETTLE=yes
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# Skip cleaning /tmp if yes
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#SKIPTMPCLEAN=no
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# For setclock
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#UTC=1
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@ -36,6 +36,16 @@
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</listitem>
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-->
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<listitem>
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<para>2012-09-27</para>
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<itemizedlist>
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<listitem>
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<para>[bdubbs] - Add boot/shutdown script customization
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instructions.</para>
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</listitem>
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</itemizedlist>
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</listitem>
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<listitem>
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<para>2012-10-02</para>
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<itemizedlist>
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@ -32,5 +32,72 @@
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<!-- Use role to fix a pdf generation problem -->
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<screen role="auto">&site;</screen>
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<sect2>
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<title>Customizing the Boot and Shutdown Scripts</title>
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<para>The LFS boot scripts boot and shut down a system in a fairly
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efficient manner, but there are a few tweaks that you can make in the
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rc.site file to improve speed even more and to adjust messages accoring
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to your preferences. To do this, adjust the settings in
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the <filename>/etc/sysconfig/rc.site</filename> file above.</para>
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<itemizedlist>
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<listitem><para>During the boot script <filename>udev</filename>, there is
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a call to <command>udev settle</command> that requires some time to
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complete. This time may or may not be required depending on devices present
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in the system. If you only have simple partitions and a single ethernet
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card, the boot process will probably not need to wait for this command. To
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skip it, set the variable OMIT_UDEV_SETTLE=y.</para></listitem>
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<listitem><para>The boot script <filename>udev_retry</filename> also runs
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<command>udev settle</command> by default. This command is only needed by
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default if the <filename class='directory'>/var</filename> directory is
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separately mounted. This is because the clock needs the file
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<filename>/var/lib/hwclock/adjtime</filename>. Other customizations may
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also need to wait for udev to complete, but in many installations it is not
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needed. Skip the command by setting the variable OMIT_UDEV_RETRY_SETTLE=y.
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</para></listitem>
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<listitem><para>By default, the file system checks are silent. This can
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appear to be a delay during the bootup process. To turn on the
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<command>fsck</command> output, set the variable VERBOSE_FSCK=y.
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</para></listitem>
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<listitem><para>When rebooting, you may want to skip the filesystem check,
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<command>fsck</command>, completely. To do this, either create the file
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<filename>/fastboot</filename> or reboot the system with the command
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<command>/sbin/shutdown -f -r now</command>. On the other hand, you can
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force all file systems to be checked by creating
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<filename>/forcefsck</filename> or running <command>shutdown</command> with
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the <parameter>-F</parameter> parameter instead of <parameter>-f</parameter>.
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</para>
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<para>Setting the variable FASTBOOT=y will disable <command>fsck</command>
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during the boot process until it is removed. This is not recommended
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on a permanent basis.</para></listitem>
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<listitem><para>Normally, all files in the <filename
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class='directory'>/tmp</filename> directory are deleted at boot time.
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Depending on the number of files or directories present, this can cause a
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noticible delay in the boot process. To skip removing these files set the
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variable SKIPTMPCLEAN=y.</para></listitem>
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<listitem><para>During shutdown, the <command>init</command> program sends
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a TERM signal to each program it has started (e.g. agetty), waits for a set
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time (default 3 seconds), and sends each process a KILL signal and waits
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again. This process is repeated in the <command>sendsignals</command>
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script for any processes that are not shut down by their own scripts. The
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delay for <command>init</command> can be set by passing a parameter. For
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example to remove the delay in <command>init</command>, pass the -t0
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parameter when shutting down or rebooting (e.g. <command>/sbin/shutdown
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-t0 -r now</command>). The delay for the <command>sendsignals</command>
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script can be skipped by setting the parameter
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KILLDELAY=0.</para></listitem>
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</itemizedlist>
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</sect2>
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</sect1>
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@ -302,7 +302,7 @@
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<!ENTITY less-ch6-du "3.8 MB">
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<!ENTITY less-ch6-sbu "less than 0.1 SBU">
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<!ENTITY lfs-bootscripts-version "20120905"> <!-- Scripts depend on this format -->
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<!ENTITY lfs-bootscripts-version "20121013"> <!-- Scripts depend on this format -->
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<!ENTITY lfs-bootscripts-size "BOOTSCRIPTS-SIZE KB"> <!-- Updated in Makefile -->
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<!ENTITY lfs-bootscripts-url "&downloads-root;lfs-bootscripts-&lfs-bootscripts-version;.tar.bz2">
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<!ENTITY lfs-bootscripts-md5 "BOOTSCRIPTS-MD5SUM"> <!-- Updated in Makefile -->
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3
udev-lfs/81-cdrom.rules
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3
udev-lfs/81-cdrom.rules
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# /etc/udev/rules.d/81-cdrom.rules: Set CD-ROM permissions and get device capabilities
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ACTION=="add", SUBSYSTEM=="block", ENV{ID_TYPE}=="cd", IMPORT{program}="cdrom_id --export $tempnode", GROUP="cdrom"
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13
udev-lfs/83-cdrom-symlinks.rules
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13
udev-lfs/83-cdrom-symlinks.rules
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# /etc/udev/rules.d/83-cdrom-symlinks.rules: Determine CD drive capability.
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ACTION!="add", GOTO="cd_aliases_generator_end"
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SUBSYSTEM!="block", GOTO="cd_aliases_generator_end"
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ENV{GENERATED}=="?*", GOTO="cd_aliases_generator_end"
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# Fail the uevent if the autogenerated rules cannot be saved
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ENV{ID_CDROM}=="?*", PROGRAM="/bin/grep -c ' / [^[:space:]]* rw' /proc/mounts", \
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RESULT!="2", RUN+="/bin/false", GOTO="cd_aliases_generator_end"
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ENV{ID_CDROM}=="?*", PROGRAM="write_cd_rules", SYMLINK+="%c"
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LABEL="cd_aliases_generator_end"
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@ -278,13 +278,14 @@ install: udev
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# Create null device and copy rules
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@cp -v rules/* $(DESTDIR)/lib/udev/rules.d
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@rm -v $(DESTDIR)/lib/udev/rules.d/99*
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@cp -v udev-lfs-$(VERSION)/*lfs.rules $(DESTDIR)/etc/udev/rules.d
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@cp -v udev-lfs-$(VERSION)/*.rules $(DESTDIR)/etc/udev/rules.d
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# Copy documentation
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@cp -v man/udev.7 $(DESTDIR)/usr/share/man/man7
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@cp -v man/udevadm.8 $(DESTDIR)/usr/share/man/man8
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@cp -v udev-lfs-$(VERSION)/udevd.8 $(DESTDIR)/usr/share/man/man8/udevd.8
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@cp -v udev-lfs-$(VERSION)/doc/* $(DESTDIR)/usr/share/doc/udev/lfs
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@cp -v udev-lfs-$(VERSION)/udevd.8 $(DESTDIR)/usr/share/man/man8
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@cp -v udev-lfs-$(VERSION)/README $(DESTDIR)/usr/share/doc/udev/lfs
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@cp -v udev-lfs-$(VERSION)/*.txt $(DESTDIR)/usr/share/doc/udev/lfs
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# Copy misc
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@cp -v udev-lfs-$(VERSION)/init-net-rules.sh $(DESTDIR)/lib/udev
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@ -29,9 +29,7 @@ write_net_rules - Scripts for LFS rules
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write_cd_rules
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rule_generator.functions
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doc - Documentation for LFS installed rules
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doc/55-lfs.txt
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doc/README
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55-lfs.txt - Documentation for LFS installed rules
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cfg.h - Basic info needed for udev compilation
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@ -1,6 +0,0 @@
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This directory contains documentation for each rule file used in LFS.
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Each .rules file should contain a corresponding .txt file in this directory,
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which explains both the overall purpose of the rules file, and each type of
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rule contained therein.
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