kdump-lib-initramfs.sh: make it POSIX compatible

POSIX doesn't support keyword local, so add double underscore and prefix
to variable names, and reduce variable usage, to avoid any variable name
conflict.

Also reformat the code with `shfmt -s -w kdump-lib-initramfs.sh`.

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Philipp Rudo <prudo@redhat.com>
This commit is contained in:
Kairui Song 2021-09-14 03:04:08 +08:00
parent 7c76611abb
commit 5debf397fe

View File

@ -9,124 +9,122 @@ KDUMP_CONFIG_FILE="/etc/kdump.conf"
# Read kdump config in well formated style
kdump_read_conf()
{
# Following steps are applied in order: strip trailing comment, strip trailing space,
# strip heading space, match non-empty line, remove duplicated spaces between conf name and value
[ -f "$KDUMP_CONFIG_FILE" ] && sed -n -e "s/#.*//;s/\s*$//;s/^\s*//;s/\(\S\+\)\s*\(.*\)/\1 \2/p" $KDUMP_CONFIG_FILE
# Following steps are applied in order: strip trailing comment, strip trailing space,
# strip heading space, match non-empty line, remove duplicated spaces between conf name and value
[ -f "$KDUMP_CONFIG_FILE" ] && sed -n -e "s/#.*//;s/\s*$//;s/^\s*//;s/\(\S\+\)\s*\(.*\)/\1 \2/p" $KDUMP_CONFIG_FILE
}
# Retrieves config value defined in kdump.conf
# $1: config name, sed regexp compatible
kdump_get_conf_val() {
# For lines matching "^\s*$1\s+", remove matched part (config name including space),
# remove tailing comment, space, then store in hold space. Print out the hold buffer on last line.
[ -f "$KDUMP_CONFIG_FILE" ] && \
sed -n -e "/^\s*\($1\)\s\+/{s/^\s*\($1\)\s\+//;s/#.*//;s/\s*$//;h};\${x;p}" $KDUMP_CONFIG_FILE
kdump_get_conf_val()
{
# For lines matching "^\s*$1\s+", remove matched part (config name including space),
# remove tailing comment, space, then store in hold space. Print out the hold buffer on last line.
[ -f "$KDUMP_CONFIG_FILE" ] &&
sed -n -e "/^\s*\($1\)\s\+/{s/^\s*\($1\)\s\+//;s/#.*//;s/\s*$//;h};\${x;p}" $KDUMP_CONFIG_FILE
}
is_mounted()
{
findmnt -k -n $1 &>/dev/null
findmnt -k -n "$1" > /dev/null 2>&1
}
# $1: info type
# $2: mount source type
# $3: mount source
# $4: extra args
get_mount_info()
{
local _info_type=$1 _src_type=$2 _src=$3; shift 3
local _info=$(findmnt -k -n -r -o $_info_type --$_src_type $_src $@)
__kdump_mnt=$(findmnt -k -n -r -o "$1" "--$2" "$3" $4)
[ -z "$_info" ] && [ -e "/etc/fstab" ] && _info=$(findmnt -s -n -r -o $_info_type --$_src_type $_src $@)
[ -z "$__kdump_mnt" ] && [ -e "/etc/fstab" ] && __kdump_mnt=$(findmnt -s -n -r -o "$1" "--$2" "$3" $4)
echo $_info
echo "$__kdump_mnt"
}
is_ipv6_address()
{
echo $1 | grep -q ":"
echo "$1" | grep -q ":"
}
is_fs_type_nfs()
{
[ "$1" = "nfs" ] || [ "$1" = "nfs4" ]
[ "$1" = "nfs" ] || [ "$1" = "nfs4" ]
}
# If $1 contains dracut_args "--mount", return <filesystem type>
get_dracut_args_fstype()
{
echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f3
echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f3
}
# If $1 contains dracut_args "--mount", return <device>
get_dracut_args_target()
{
echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f1
echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f1
}
get_save_path()
{
local _save_path=$(kdump_get_conf_val path)
[ -z "$_save_path" ] && _save_path=$DEFAULT_PATH
__kdump_path=$(kdump_get_conf_val path)
[ -z "$__kdump_path" ] && __kdump_path=$DEFAULT_PATH
# strip the duplicated "/"
echo $_save_path | tr -s /
# strip the duplicated "/"
echo "$__kdump_path" | tr -s /
}
get_root_fs_device()
{
findmnt -k -f -n -o SOURCE /
findmnt -k -f -n -o SOURCE /
}
# Return the current underlying device of a path, ignore bind mounts
get_target_from_path()
{
local _target
_target=$(df $1 2>/dev/null | tail -1 | awk '{print $1}')
[[ "$_target" == "/dev/root" ]] && [[ ! -e /dev/root ]] && _target=$(get_root_fs_device)
echo $_target
__kdump_target=$(df "$1" 2> /dev/null | tail -1 | awk '{print $1}')
[ "$__kdump_target" = "/dev/root" ] && [ ! -e /dev/root ] && __kdump_target=$(get_root_fs_device)
echo "$__kdump_target"
}
get_fs_type_from_target()
{
get_mount_info FSTYPE source $1 -f
get_mount_info FSTYPE source "$1" -f
}
get_mntpoint_from_target()
{
# --source is applied to ensure non-bind mount is returned
get_mount_info TARGET source $1 -f
# --source is applied to ensure non-bind mount is returned
get_mount_info TARGET source "$1" -f
}
is_ssh_dump_target()
{
[[ $(kdump_get_conf_val ssh) == *@* ]]
kdump_get_conf_val ssh | grep -q @
}
is_raw_dump_target()
{
[[ $(kdump_get_conf_val raw) ]]
[ -n "$(kdump_get_conf_val raw)" ]
}
is_nfs_dump_target()
{
if [[ $(kdump_get_conf_val nfs) ]]; then
return 0;
fi
if [ -n "$(kdump_get_conf_val nfs)" ]; then
return 0
fi
if is_fs_type_nfs $(get_dracut_args_fstype "$(kdump_get_conf_val dracut_args)"); then
return 0
fi
if is_fs_type_nfs "$(get_dracut_args_fstype "$(kdump_get_conf_val dracut_args)")"; then
return 0
fi
local _save_path=$(get_save_path)
local _target=$(get_target_from_path $_save_path)
local _fstype=$(get_fs_type_from_target $_target)
if is_fs_type_nfs "$(get_fs_type_from_target "$(get_target_from_path "$(get_save_path)")")"; then
return 0
fi
if is_fs_type_nfs $_fstype; then
return 0
fi
return 1
return 1
}
is_fs_dump_target()
{
[[ $(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix") ]]
[ -n "$(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix")" ]
}