kexec-tools/dracut-early-kdump-module-setup.sh

#!/bin/bash

. /etc/sysconfig/kdump

KDUMP_KERNEL=""
KDUMP_INITRD=""

check() {
    if [[ ! -f /etc/sysconfig/kdump ]] || [[ ! -f /lib/kdump/kdump-lib.sh ]]\
        || [[ -n "${IN_KDUMP}" ]]
    then
        return 1
    fi
    return 255
}

depends() {
    echo "base shutdown"
    return 0
}

prepare_kernel_initrd() {
    . /lib/kdump/kdump-lib.sh

    prepare_kdump_bootinfo

    # $kernel is a variable from dracut
    if [[ "$KDUMP_KERNELVER" != "$kernel" ]]; then
        dwarn "Using kernel version '$KDUMP_KERNELVER' for early kdump," \
            "but the initramfs is generated for kernel version '$kernel'"
    fi
}

install() {
    prepare_kernel_initrd
    if [[ ! -f "$KDUMP_KERNEL" ]]; then
        derror "Could not find required kernel for earlykdump," \
            "earlykdump will not work!"
        return 1
    fi
    if [[ ! -f "$KDUMP_INITRD" ]]; then
        derror "Could not find required kdump initramfs for earlykdump," \
            "please ensure kdump initramfs is generated first," \
            "earlykdump will not work!"
        return 1
    fi

    inst_multiple tail find cut dirname hexdump
    inst_simple "/etc/sysconfig/kdump"
    inst_binary "/usr/sbin/kexec"
    inst_binary "/usr/bin/gawk" "/usr/bin/awk"
    inst_binary "/usr/bin/logger" "/usr/bin/logger"
    inst_binary "/usr/bin/printf" "/usr/bin/printf"
    inst_script "/lib/kdump/kdump-lib.sh" "/lib/kdump-lib.sh"
    inst_script "/lib/kdump/kdump-logger.sh" "/lib/kdump-logger.sh"
    inst_hook cmdline 00 "$moddir/early-kdump.sh"
    inst_binary "$KDUMP_KERNEL"
    inst_binary "$KDUMP_INITRD"

    ln_r "$KDUMP_KERNEL" "/boot/kernel-earlykdump"
    ln_r "$KDUMP_INITRD" "/boot/initramfs-earlykdump"

    chmod -x "${initdir}/$KDUMP_KERNEL"
}