kdump-lib.sh: fix variable quoting issue
Fixed quoting issues found by shellcheck, no feature change. This should fix many errors when there is space in any shell variables. And fixed how remove_cmdline_param is being called in prepare_cmdline. Kernel parameters can have space like: param="spaces in here". So currently remove_cmdline_param is broken since its args always get split by space. But prepare_cmdline is expecting remove_cmdline_param to split its args by space and passing a list of kernel args separated by space as a whole arg. So fix that by using `xargs` to parse and split the args properly, then call remove_cmdline_param. Following quoting related issues are fixed (check the link for example code and what could go wrong): https://github.com/koalaman/shellcheck/wiki/SC1007 https://github.com/koalaman/shellcheck/wiki/SC2046 https://github.com/koalaman/shellcheck/wiki/SC2053 https://github.com/koalaman/shellcheck/wiki/SC2060 https://github.com/koalaman/shellcheck/wiki/SC2068 https://github.com/koalaman/shellcheck/wiki/SC2086 Signed-off-by: Kairui Song <kasong@redhat.com>
This commit is contained in:
Kairui Song
parent
319219d23b
commit
4f01cb1b0a
132
kdump-lib.sh
132
kdump-lib.sh
@ -25,7 +25,7 @@ is_squash_available() {
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if [[ -z "$KDUMP_KERNELVER" ]]; then
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modprobe --dry-run $kmodule &>/dev/null || return 1
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else
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modprobe -S $KDUMP_KERNELVER --dry-run $kmodule &>/dev/null || return 1
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modprobe -S "$KDUMP_KERNELVER" --dry-run $kmodule &>/dev/null || return 1
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fi
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done
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}
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@ -79,10 +79,10 @@ get_user_configured_dump_disk()
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local _target
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_target=$(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix\|raw")
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[[ -n "$_target" ]] && echo $_target && return
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[[ -n "$_target" ]] && echo "$_target" && return
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_target=$(get_dracut_args_target "$(kdump_get_conf_val "dracut_args")")
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[[ -b "$_target" ]] && echo $_target
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[[ -b "$_target" ]] && echo "$_target"
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}
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get_block_dump_target()
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@ -94,12 +94,12 @@ get_block_dump_target()
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fi
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_target=$(get_user_configured_dump_disk)
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[[ -n "$_target" ]] && to_dev_name $_target && return
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[[ -n "$_target" ]] && to_dev_name "$_target" && return
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# Get block device name from local save path
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_path=$(get_save_path)
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_target=$(get_target_from_path $_path)
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[[ -b "$_target" ]] && to_dev_name $_target
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_target=$(get_target_from_path "$_path")
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[[ -b "$_target" ]] && to_dev_name "$_target"
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}
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is_dump_to_rootfs()
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@ -114,7 +114,7 @@ get_failure_action_target()
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if is_dump_to_rootfs; then
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# Get rootfs device name
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_target=$(get_root_fs_device)
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[[ -b "$_target" ]] && to_dev_name $_target && return
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[[ -b "$_target" ]] && to_dev_name "$_target" && return
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# Then, must be nfs root
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echo "nfs"
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fi
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@ -158,27 +158,27 @@ get_kdump_targets()
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# part is the bind mounted directory which quotes by bracket "[]".
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get_bind_mount_source()
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{
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local _mnt=$(df $1 | tail -1 | awk '{print $NF}')
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local _mnt=$(df "$1" | tail -1 | awk '{print $NF}')
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local _path=${1#$_mnt}
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local _src=$(get_mount_info SOURCE target $_mnt -f)
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local _opt=$(get_mount_info OPTIONS target $_mnt -f)
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local _fstype=$(get_mount_info FSTYPE target $_mnt -f)
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local _src=$(get_mount_info SOURCE target "$_mnt" -f)
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local _opt=$(get_mount_info OPTIONS target "$_mnt" -f)
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local _fstype=$(get_mount_info FSTYPE target "$_mnt" -f)
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# bind mount in fstab
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if [[ -d "$_src" ]] && [[ "$_fstype" = none ]] && (echo "$_opt" | grep -q "\bbind\b"); then
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echo $_src$_path && return
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echo "$_src$_path" && return
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fi
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# direct mount
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local _src_nofsroot=$(get_mount_info SOURCE target $_mnt -v -f)
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if [[ $_src_nofsroot = $_src ]]; then
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echo $_mnt$_path && return
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local _src_nofsroot=$(get_mount_info SOURCE target "$_mnt" -v -f)
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if [[ $_src_nofsroot = "$_src" ]]; then
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echo "$_mnt$_path" && return
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fi
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local _fsroot=${_src#${_src_nofsroot}[}
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_fsroot=${_fsroot%]}
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_mnt=$(get_mount_info TARGET source $_src_nofsroot -f)
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_mnt=$(get_mount_info TARGET source "$_src_nofsroot" -f)
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# for btrfs, _fsroot will also contain the subvol value as well, strip it
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if [[ "$_fstype" = btrfs ]]; then
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@ -187,19 +187,19 @@ get_bind_mount_source()
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_subvol=${_subvol%,*}
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_fsroot=${_fsroot#$_subvol}
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fi
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echo $_mnt$_fsroot$_path
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echo "$_mnt$_fsroot$_path"
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}
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get_mntopt_from_target()
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{
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get_mount_info OPTIONS source $1 -f
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get_mount_info OPTIONS source "$1" -f
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}
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# Get the path where the target will be mounted in kdump kernel
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# $1: kdump target device
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get_kdump_mntpoint_from_target()
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{
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local _mntpoint=$(get_mntpoint_from_target $1)
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local _mntpoint=$(get_mntpoint_from_target "$1")
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# mount under /sysroot if dump to root disk or mount under
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# mount under /kdumproot if dump target is not mounted in first kernel
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@ -249,26 +249,26 @@ get_remote_host()
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_config_val=${_config_val%:/*}
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_config_val=${_config_val#[}
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_config_val=${_config_val%]}
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echo $_config_val
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echo "$_config_val"
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}
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is_hostname()
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{
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local _hostname=$(echo $1 | grep ":")
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local _hostname=$(echo "$1" | grep ":")
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if [[ -n "$_hostname" ]]; then
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return 1
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fi
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echo $1 | grep -q "[a-zA-Z]"
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echo "$1" | grep -q "[a-zA-Z]"
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}
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# Copied from "/etc/sysconfig/network-scripts/network-functions"
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get_hwaddr()
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{
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if [[ -f "/sys/class/net/${1}/address" ]]; then
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awk '{ print toupper($0) }' < /sys/class/net/${1}/address
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elif [[ -d "/sys/class/net/${1}" ]]; then
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LC_ALL= LANG= ip -o link show ${1} 2>/dev/null | \
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if [[ -f "/sys/class/net/$1/address" ]]; then
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awk '{ print toupper($0) }' < "/sys/class/net/$1/address"
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elif [[ -d "/sys/class/net/$1" ]]; then
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LC_ALL="" LANG="" ip -o link show "$1" 2>/dev/null | \
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awk '{ print toupper(gensub(/.*link\/[^ ]* ([[:alnum:]:]*).*/,
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"\\1", 1)); }'
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fi
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@ -484,14 +484,14 @@ remove_cmdline_param()
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local cmdline=$1
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shift
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for arg in $@; do
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for arg in "$@"; do
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cmdline=$(echo "$cmdline" | \
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sed -e "s/\b$arg=[^ ]*//g" \
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-e "s/^$arg\b//g" \
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-e "s/[[:space:]]$arg\b//g" \
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-e "s/\s\+/ /g")
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done
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echo $cmdline
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echo "$cmdline"
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}
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#
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@ -522,7 +522,7 @@ append_cmdline()
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cmdline="${cmdline} ${2}=${3}"
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fi
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echo $cmdline
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echo "$cmdline"
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}
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# This function check iomem and determines if we have more than
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@ -559,12 +559,12 @@ is_secure_boot_enforced()
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fi
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# Detect secure boot on x86 and arm64
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secure_boot_file=$(find /sys/firmware/efi/efivars -name SecureBoot-* 2>/dev/null)
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setup_mode_file=$(find /sys/firmware/efi/efivars -name SetupMode-* 2>/dev/null)
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secure_boot_file=$(find /sys/firmware/efi/efivars -name "SecureBoot-*" 2>/dev/null)
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setup_mode_file=$(find /sys/firmware/efi/efivars -name "SetupMode-*" 2>/dev/null)
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if [[ -f "$secure_boot_file" ]] && [[ -f "$setup_mode_file" ]]; then
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secure_boot_byte=$(hexdump -v -e '/1 "%d\ "' $secure_boot_file|cut -d' ' -f 5)
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setup_mode_byte=$(hexdump -v -e '/1 "%d\ "' $setup_mode_file|cut -d' ' -f 5)
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secure_boot_byte=$(hexdump -v -e '/1 "%d\ "' "$secure_boot_file" | cut -d' ' -f 5)
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setup_mode_byte=$(hexdump -v -e '/1 "%d\ "' "$setup_mode_file" | cut -d' ' -f 5)
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if [[ "$secure_boot_byte" = "1" ]] && [[ "$setup_mode_byte" = "0" ]]; then
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return 0
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@ -594,7 +594,7 @@ prepare_kexec_args()
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need_64bit_headers
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if [[ $? == 1 ]]
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then
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found_elf_args=$(echo $kexec_args | grep elf32-core-headers)
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found_elf_args=$(echo "$kexec_args" | grep elf32-core-headers)
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if [[ -n "$found_elf_args" ]]
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then
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dwarn "Warning: elf32-core-headers overrides correct elf64 setting"
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@ -602,14 +602,14 @@ prepare_kexec_args()
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kexec_args="$kexec_args --elf64-core-headers"
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fi
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else
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found_elf_args=$(echo $kexec_args | grep elf64-core-headers)
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found_elf_args=$(echo "$kexec_args" | grep elf64-core-headers)
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if [[ -z "$found_elf_args" ]]
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then
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kexec_args="$kexec_args --elf32-core-headers"
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fi
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fi
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fi
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echo $kexec_args
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echo "$kexec_args"
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}
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#
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@ -641,7 +641,7 @@ prepare_kdump_bootinfo()
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for dir in $boot_dirlist; do
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for img in $boot_imglist; do
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if [[ -f "$dir/$img" ]]; then
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KDUMP_KERNEL=$(echo $dir/$img | tr -s '/')
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KDUMP_KERNEL=$(echo "$dir/$img" | tr -s '/')
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break 2
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fi
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done
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@ -653,7 +653,7 @@ prepare_kdump_bootinfo()
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fi
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# Set KDUMP_BOOTDIR to where kernel image is stored
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KDUMP_BOOTDIR=$(dirname $KDUMP_KERNEL)
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KDUMP_BOOTDIR=$(dirname "$KDUMP_KERNEL")
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# Default initrd should just stay aside of kernel image, try to find it in KDUMP_BOOTDIR
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boot_initrdlist="initramfs-$KDUMP_KERNELVER.img initrd"
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@ -694,7 +694,7 @@ get_watchdog_drvs()
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# device/modalias will return driver of this device
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[[ -f "$_dir/device/modalias" ]] || continue
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_drv=$(< "$_dir/device/modalias")
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_drv=$(modprobe --set-version "$KDUMP_KERNELVER" -R $_drv 2>/dev/null)
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_drv=$(modprobe --set-version "$KDUMP_KERNELVER" -R "$_drv" 2>/dev/null)
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for i in $_drv; do
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if ! [[ " $_wdtdrvs " == *" $i "* ]]; then
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_wdtdrvs="$_wdtdrvs $i"
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@ -702,7 +702,7 @@ get_watchdog_drvs()
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done
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done
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echo $_wdtdrvs
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echo "$_wdtdrvs"
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}
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#
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@ -711,7 +711,7 @@ get_watchdog_drvs()
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# Store the final result in global $KDUMP_COMMANDLINE.
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prepare_cmdline()
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{
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local cmdline id
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local cmdline id arg
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if [[ -z "$1" ]]; then
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cmdline=$(</proc/cmdline)
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@ -722,7 +722,9 @@ prepare_cmdline()
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# These params should always be removed
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cmdline=$(remove_cmdline_param "$cmdline" crashkernel panic_on_warn)
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# These params can be removed configurably
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cmdline=$(remove_cmdline_param "$cmdline" "$2")
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while read -r arg; do
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cmdline=$(remove_cmdline_param "$cmdline" "$arg")
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done <<< "$(echo "$2" | xargs -n 1 echo)"
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# Always remove "root=X", as we now explicitly generate all kinds
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# of dump target mount information including root fs.
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@ -766,20 +768,20 @@ prepare_cmdline()
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cmdline=$(remove_cmdline_param "$cmdline" trace_buf_size trace_event)
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cmdline="${cmdline} trace_buf_size=1"
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echo ${cmdline}
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echo "$cmdline"
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}
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#get system memory size in the unit of GB
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get_system_size()
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{
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result=$(grep "System RAM" /proc/iomem | awk -F ":" '{ print $1 }' | tr [:lower:] [:upper:] | paste -sd+)
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result=$(grep "System RAM" /proc/iomem | awk -F ":" '{ print $1 }' | tr "[:lower:]" "[:upper:]" | paste -sd+)
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result="+$result"
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# replace '-' with '+0x' and '+' with '-0x'
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sum=$(echo "$result" | sed -e 's/-/K0x/g' -e 's/+/-0x/g' -e 's/K/+/g')
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size=$(printf "%d\n" $(($sum)))
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size=$((size / 1024 / 1024 / 1024))
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echo $size
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echo "$size"
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}
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get_recommend_size()
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@ -795,15 +797,15 @@ get_recommend_size()
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fi
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IFS=','
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for i in $_ck_cmdline; do
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end=$(echo $i | awk -F "-" '{ print $2 }' | awk -F ":" '{ print $1 }')
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recommend=$(echo $i | awk -F "-" '{ print $2 }' | awk -F ":" '{ print $2 }')
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end=$(echo "$i" | awk -F "-" '{ print $2 }' | awk -F ":" '{ print $1 }')
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recommend=$(echo "$i" | awk -F "-" '{ print $2 }' | awk -F ":" '{ print $2 }')
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size=${end: : -1}
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unit=${end: -1}
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if [[ $unit == 'T' ]]; then
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size=$((size * 1024))
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fi
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if [[ $mem_size -lt $size ]]; then
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echo $recommend
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echo "$recommend"
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IFS="$OLDIFS"
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return
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fi
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@ -855,10 +857,10 @@ get_luks_crypt_dev()
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{
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[[ -b /dev/block/$1 ]] || return 1
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local _type=$(eval "$(blkid -u filesystem,crypto -o export -- /dev/block/$1); echo \$TYPE")
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[[ $_type == "crypto_LUKS" ]] && echo $1
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local _type=$(eval "$(blkid -u filesystem,crypto -o export -- "/dev/block/$1"); echo \$TYPE")
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[[ $_type == "crypto_LUKS" ]] && echo "$1"
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for _x in /sys/dev/block/$1/slaves/*; do
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for _x in "/sys/dev/block/$1/slaves/"*; do
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[[ -f $_x/dev ]] || continue
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[[ $_x/subsystem -ef /sys/class/block ]] || continue
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get_luks_crypt_dev "$(< "$_x/dev")"
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@ -888,7 +890,7 @@ get_all_kdump_crypt_dev()
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check_vmlinux()
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{
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# Use readelf to check if it's a valid ELF
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readelf -h $1 &>/dev/null || return 1
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readelf -h "$1" &>/dev/null || return 1
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}
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get_vmlinux_size()
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@ -910,14 +912,14 @@ try_decompress()
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# Try to find the header ($1) and decompress from here
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for pos in $(tr "$1\n$2" "\n$2=" < "$4" | grep -abo "^$2")
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do
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if ! type -P $3 > /dev/null; then
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if ! type -P "$3" > /dev/null; then
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ddebug "Signiature detected but '$3' is missing, skip this decompressor"
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break
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fi
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pos=${pos%%:*}
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tail -c+$pos "$img" | $3 > $5 2> /dev/null
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if check_vmlinux $5; then
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tail "-c+$pos" "$img" | $3 > "$5" 2> /dev/null
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if check_vmlinux "$5"; then
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ddebug "Kernel is extracted with '$3'"
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return 0
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fi
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@ -931,22 +933,22 @@ get_kernel_size()
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{
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# Prepare temp files:
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local img=$1 tmp=$(mktemp /tmp/vmlinux-XXX)
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trap "rm -f $tmp" 0
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trap 'rm -f "$tmp"' 0
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# Try to check if it's a vmlinux already
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check_vmlinux $img && get_vmlinux_size $img && return 0
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check_vmlinux "$img" && get_vmlinux_size "$img" && return 0
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# That didn't work, so retry after decompression.
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try_decompress '\037\213\010' xy gunzip $img $tmp || \
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try_decompress '\3757zXZ\000' abcde unxz $img $tmp || \
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try_decompress 'BZh' xy bunzip2 $img $tmp || \
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try_decompress '\135\0\0\0' xxx unlzma $img $tmp || \
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try_decompress '\211\114\132' xy 'lzop -d' $img $tmp || \
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try_decompress '\002!L\030' xxx 'lz4 -d' $img $tmp || \
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try_decompress '(\265/\375' xxx unzstd $img $tmp
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try_decompress '\037\213\010' xy gunzip "$img" "$tmp" || \
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try_decompress '\3757zXZ\000' abcde unxz "$img" "$tmp" || \
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try_decompress 'BZh' xy bunzip2 "$img" "$tmp" || \
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try_decompress '\135\0\0\0' xxx unlzma "$img" "$tmp" || \
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try_decompress '\211\114\132' xy 'lzop -d' "$img" "$tmp" || \
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try_decompress '\002!L\030' xxx 'lz4 -d' "$img" "$tmp" || \
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try_decompress '(\265/\375' xxx unzstd "$img" "$tmp"
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# Finally check for uncompressed images or objects:
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[[ $? -eq 0 ]] && get_vmlinux_size $tmp && return 0
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[[ $? -eq 0 ]] && get_vmlinux_size "$tmp" && return 0
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# Fallback to use iomem
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local _size=0 _seg
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