410 lines
8.6 KiB
Bash
Executable File
410 lines
8.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# Common shell functions which may be used by any hook script
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#
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# If you find that a distribution-specific hook script or two
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# are doing the same thing more than once it should be added here.
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#
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# This script also includes a logging utility which you're encouraged
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# to use.
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#
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# The routines here may be freely called from any role script(s) you
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# might develop.
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#
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# Steve
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# --
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#
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#
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# If we're running verbosely show a message, otherwise swallow it.
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#
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logMessage ()
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{
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message="$*"
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if [ ! -z "${verbose}" ]; then
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echo $message
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fi
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}
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#
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# Test the given condition is true, and if not abort.
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#
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# Sample usage:
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# assert "$LINENO" "${verbose}"
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#
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assert ()
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{
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lineno="?"
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if [ -n "${LINENO}" ]; then
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# our shell defines variable LINENO, great!
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lineno=$1
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shift
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fi
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if [ ! $* ] ; then
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echo "assert failed: $0:$lineno [$*]"
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exit
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fi
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}
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#
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# Install a number of Debian packages via apt-get.
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#
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# We take special care so that daemons shouldn't start after installation
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# which they might otherwise do.
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#
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# NOTE: Function not renamed with trailing "s" for compatibility reasons.
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#
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installDebianPackage ()
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{
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prefix=$1
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shift
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#
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# Log our options
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#
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logMessage "Installing Debian packages $@ to prefix ${prefix}"
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#
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# We require a package + prefix
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#
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assert "$LINENO" "${prefix}"
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#
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# Prefix must be a directory.
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#
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assert "$LINENO" -d ${prefix}
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#
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# Use policy-rc to stop any daemons from starting.
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#
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printf '#!/bin/sh\nexit 101\n' > ${prefix}/usr/sbin/policy-rc.d
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chmod +x ${prefix}/usr/sbin/policy-rc.d
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#
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# Disable the start-stop-daemon - this shouldn't be necessary
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# with the policy-rc.d addition above, however leaving it in
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# place won't hurt ..
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#
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disableStartStopDaemon ${prefix}
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#
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# Install the packages
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#
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DEBIAN_FRONTEND=noninteractive chroot ${prefix} /usr/bin/apt-get --yes --force-yes --no-install-recommends install "$@"
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#
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# Remove the policy-rc.d script.
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#
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rm -f ${prefix}/usr/sbin/policy-rc.d
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#
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# Re-enable the start-stop-daemon
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#
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enableStartStopDaemon ${prefix}
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}
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#
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# Generate a Debian-/Ubuntu-compliant menu.lst for legacy GRUB
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#
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generateDebianGrubMenuLst ()
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{
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prefix="$1"
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DOMU_ISSUE="$2"
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DOMU_KERNEL="$3"
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DOMU_RAMDISK="$4"
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#
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# Log our options
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#
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logMessage "Generating a legacy GRUB menu.lst into prefix ${prefix}"
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#
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# We require at least 3 parameters
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#
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assert "$LINENO" "${prefix}"
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assert "$LINENO" "${DOMU_ISSUE}"
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assert "$LINENO" "${DOMU_KERNEL}"
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#
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# Prefix must be a directory, kernel a file
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#
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assert "$LINENO" -d ${prefix}
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assert "$LINENO" -f "${prefix}/boot/${DOMU_KERNEL}"
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#
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# Generate a menu.lst for pygrub
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#
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mkdir -p ${prefix}/boot/grub
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cat << E_O_MENU > ${prefix}/boot/grub/menu.lst
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default 0
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timeout 2
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### BEGIN AUTOMAGIC KERNELS LIST
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## lines between the AUTOMAGIC KERNELS LIST markers will be modified
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## by the debian update-grub script except for the default options below
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## DO NOT UNCOMMENT THEM, Just edit them to your needs
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## ## Start Default Options ##
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## default kernel options
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## default kernel options for automagic boot options
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## If you want special options for specific kernels use kopt_x_y_z
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## where x.y.z is kernel version. Minor versions can be omitted.
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## e.g. kopt=root=/dev/hda1 ro
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## kopt_2_6_8=root=/dev/hdc1 ro
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## kopt_2_6_8_2_686=root=/dev/hdc2 ro
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# kopt=root=/dev/xvda2 ro elevator=noop
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## default grub root device
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## e.g. groot=(hd0,0)
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# groot=(hd0,0)
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## should update-grub create alternative automagic boot options
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## e.g. alternative=true
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## alternative=false
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# alternative=true
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## should update-grub lock alternative automagic boot options
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## e.g. lockalternative=true
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## lockalternative=false
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# lockalternative=false
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## additional options to use with the default boot option, but not with the
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## alternatives
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## e.g. defoptions=vga=791 resume=/dev/hda5
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# defoptions=
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## should update-grub lock old automagic boot options
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## e.g. lockold=false
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## lockold=true
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# lockold=false
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## altoption boot targets option
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## multiple altoptions lines are allowed
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## e.g. altoptions=(extra menu suffix) extra boot options
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## altoptions=(single-user) single
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# altoptions=(single-user mode) single
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## controls how many kernels should be put into the menu.lst
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## only counts the first occurence of a kernel, not the
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## alternative kernel options
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## e.g. howmany=all
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## howmany=7
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# howmany=all
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## should update-grub create memtest86 boot option
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## e.g. memtest86=true
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## memtest86=false
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# memtest86=false
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## should update-grub adjust the value of the default booted system
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## can be true or false
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# updatedefaultentry=false
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## should update-grub add savedefault to the default options
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## can be true or false
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# savedefault=false
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## ## End Default Options ##
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### END DEBIAN AUTOMAGIC KERNELS LIST
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# Entries statically generated bu xen-tools upon installation. Maybe
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# removed manually if the entries above (generated by update-grub)
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# seem to work fine.
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title $DOMU_ISSUE
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root (hd0,0)
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kernel /boot/$DOMU_KERNEL root=/dev/xvda2 ro elevator=noop
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initrd /boot/$DOMU_RAMDISK
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title $DOMU_ISSUE (Single-User)
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root (hd0,0)
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kernel /boot/$DOMU_KERNEL root=/dev/xvda2 ro single elevator=noop
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initrd /boot/$DOMU_RAMDISK
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title $DOMU_ISSUE (Default Kernel)
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root (hd0,0)
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kernel /vmlinuz root=/dev/xvda2 ro elevator=noop
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initrd /initrd.img
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title $DOMU_ISSUE (Default Kernel, Single-User)
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root (hd0,0)
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kernel /vmlinuz root=/dev/xvda2 ro single elevator=noop
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initrd /initrd.img
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E_O_MENU
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}
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#
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# Disable the start-stop-daemon
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#
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disableStartStopDaemon ()
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{
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local prefix="$1"
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assert "$LINENO" "${prefix}"
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for starter in start-stop-daemon initctl; do
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local daemonfile="${prefix}/sbin/${starter}"
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mv "${daemonfile}" "${daemonfile}.REAL"
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echo '#!/bin/sh' > "${daemonfile}"
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echo "echo \"Warning: Fake ${starter} called, doing nothing\"" >> "${daemonfile}"
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chmod 755 "${daemonfile}"
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logMessage "${starter} disabled / made a stub."
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done
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}
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#
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# Enable the start-stop-daemon
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#
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enableStartStopDaemon ()
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{
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local prefix=$1
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assert "$LINENO" "${prefix}"
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for starter in start-stop-daemon initctl; do
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local daemonfile="${prefix}/sbin/${starter}"
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#
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# If the disabled file is present then enable it.
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#
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if [ -e "${daemonfile}.REAL" ]; then
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mv "${daemonfile}.REAL" "${daemonfile}"
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logMessage "${starter} restored to working order."
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fi
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done
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}
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#
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# Remove the specified Debian packages.
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#
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# NOTE: Function not renamed with trailing "s" for compatibility reasons.
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#
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removeDebianPackage ()
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{
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prefix=$1
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shift
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#
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# Log our options
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#
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logMessage "Purging Debian package ${package} from prefix ${prefix}"
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#
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# We require a prefix
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#
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assert "$LINENO" "${prefix}"
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#
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# Prefix must be a directory.
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#
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assert "$LINENO" -d ${prefix}
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#
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# Purge the packages we've been given.
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#
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chroot ${prefix} /usr/bin/apt-get remove --yes --purge "$@"
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}
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#
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# Install a RPM package via yum
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#
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installRPMPackage ()
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{
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prefix=$1
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package=$2
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#
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# Log our options
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#
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logMessage "Installing RPM ${package} to prefix ${prefix}"
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#
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# We require a package + prefix
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#
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assert "$LINENO" "${package}"
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assert "$LINENO" "${prefix}"
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#
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# Prefix must be a directory.
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#
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assert "$LINENO" -d ${prefix}
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#
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# Install the package
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#
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chroot ${prefix} /usr/bin/yum -y install ${package}
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}
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# Backwards Compatibility Function
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installCentOS4Package () ( installRPMPackage "$@" )
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#
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# Functions to test if we're on a redhatesk or debianesk system
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#
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isDeb() ( [ -x $1/usr/bin/apt-get -a -x $1/usr/bin/dpkg ] )
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isYum() ( [ -x $1/usr/bin/yum ] )
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#
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# Install a package using whatever package management tool is available
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#
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installPackage ()
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{
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prefix=$1
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package=$2
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if isDeb ; then
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installDebianPackage "$@"
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elif isYum ; then
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installRPMPackage "$@"
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else
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logMessage "Unable to install package ${package}; no package manager found"
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fi
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}
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#
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# Install a package upon a gentoo system via emerge.
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#
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# TODO: STUB
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#
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installGentooPackage ()
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{
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prefix=$1
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package=$2
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#
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# Log our options
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#
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logMessage "Installing Gentoo package ${package} to prefix ${prefix}"
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logMessage "NOTE: Not doing anything - this is a stub - FIXME"
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}
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