5debf397fe
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>
131 lines
2.9 KiB
Bash
Executable File
131 lines
2.9 KiB
Bash
Executable File
#!/bin/sh
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#
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# Function and variables used in initramfs environment, POSIX compatible
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#
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DEFAULT_PATH="/var/crash/"
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KDUMP_CONFIG_FILE="/etc/kdump.conf"
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# Read kdump config in well formated style
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kdump_read_conf()
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{
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# Following steps are applied in order: strip trailing comment, strip trailing space,
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# strip heading space, match non-empty line, remove duplicated spaces between conf name and value
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[ -f "$KDUMP_CONFIG_FILE" ] && sed -n -e "s/#.*//;s/\s*$//;s/^\s*//;s/\(\S\+\)\s*\(.*\)/\1 \2/p" $KDUMP_CONFIG_FILE
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}
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# Retrieves config value defined in kdump.conf
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# $1: config name, sed regexp compatible
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kdump_get_conf_val()
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{
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# For lines matching "^\s*$1\s+", remove matched part (config name including space),
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# remove tailing comment, space, then store in hold space. Print out the hold buffer on last line.
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[ -f "$KDUMP_CONFIG_FILE" ] &&
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sed -n -e "/^\s*\($1\)\s\+/{s/^\s*\($1\)\s\+//;s/#.*//;s/\s*$//;h};\${x;p}" $KDUMP_CONFIG_FILE
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}
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is_mounted()
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{
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findmnt -k -n "$1" > /dev/null 2>&1
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}
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# $1: info type
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# $2: mount source type
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# $3: mount source
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# $4: extra args
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get_mount_info()
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{
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__kdump_mnt=$(findmnt -k -n -r -o "$1" "--$2" "$3" $4)
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[ -z "$__kdump_mnt" ] && [ -e "/etc/fstab" ] && __kdump_mnt=$(findmnt -s -n -r -o "$1" "--$2" "$3" $4)
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echo "$__kdump_mnt"
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}
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is_ipv6_address()
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{
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echo "$1" | grep -q ":"
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}
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is_fs_type_nfs()
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{
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[ "$1" = "nfs" ] || [ "$1" = "nfs4" ]
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}
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# If $1 contains dracut_args "--mount", return <filesystem type>
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get_dracut_args_fstype()
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{
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echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f3
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}
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# If $1 contains dracut_args "--mount", return <device>
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get_dracut_args_target()
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{
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echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f1
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}
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get_save_path()
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{
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__kdump_path=$(kdump_get_conf_val path)
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[ -z "$__kdump_path" ] && __kdump_path=$DEFAULT_PATH
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# strip the duplicated "/"
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echo "$__kdump_path" | tr -s /
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}
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get_root_fs_device()
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{
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findmnt -k -f -n -o SOURCE /
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}
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# Return the current underlying device of a path, ignore bind mounts
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get_target_from_path()
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{
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__kdump_target=$(df "$1" 2> /dev/null | tail -1 | awk '{print $1}')
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[ "$__kdump_target" = "/dev/root" ] && [ ! -e /dev/root ] && __kdump_target=$(get_root_fs_device)
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echo "$__kdump_target"
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}
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get_fs_type_from_target()
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{
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get_mount_info FSTYPE source "$1" -f
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}
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get_mntpoint_from_target()
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{
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# --source is applied to ensure non-bind mount is returned
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get_mount_info TARGET source "$1" -f
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}
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is_ssh_dump_target()
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{
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kdump_get_conf_val ssh | grep -q @
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}
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is_raw_dump_target()
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{
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[ -n "$(kdump_get_conf_val raw)" ]
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}
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is_nfs_dump_target()
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{
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if [ -n "$(kdump_get_conf_val nfs)" ]; then
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return 0
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fi
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if is_fs_type_nfs "$(get_dracut_args_fstype "$(kdump_get_conf_val dracut_args)")"; then
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return 0
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fi
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if is_fs_type_nfs "$(get_fs_type_from_target "$(get_target_from_path "$(get_save_path)")")"; then
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return 0
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fi
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return 1
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}
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is_fs_dump_target()
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{
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[ -n "$(kdump_get_conf_val "ext[234]\|xfs\|btrfs\|minix")" ]
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}
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