104 lines
2.7 KiB
Bash
Executable file
104 lines
2.7 KiB
Bash
Executable file
#!/bin/sh
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#
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# mkconf -- outputs valid mdadm.conf contents for the local system
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#
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# Copyright © martin f. krafft <madduck@madduck.net>
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# distributed under the terms of the Artistic Licence 2.0
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#
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set -eu
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ME="${0##*/}"
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MDADM=/sbin/mdadm
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DEBIANCONFIG=/etc/default/mdadm
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CONFIG=/etc/mdadm/mdadm.conf
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# initialise config variables in case the environment leaks
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MAILADDR= DEVICE= HOMEHOST= PROGRAM=
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test -r $DEBIANCONFIG && . $DEBIANCONFIG
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if [ -n "${MDADM_MAILADDR__:-}" ]; then
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# honour MAILADDR from the environment (from postinst)
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MAILADDR="$MDADM_MAILADDR__"
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else
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# preserve existing MAILADDR
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MAILADDR="$(sed -ne 's/^MAILADDR //p' $CONFIG 2>/dev/null)" || :
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fi
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# save existing values as defaults
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if [ -r "$CONFIG" ]; then
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DEVICE="$(sed -ne 's/^DEVICE //p' $CONFIG)"
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HOMEHOST="$(sed -ne 's/^HOMEHOST //p' $CONFIG)"
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PROGRAM="$(sed -ne 's/^PROGRAM //p' $CONFIG)"
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fi
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[ "${1:-}" = force-generate ] && rm -f $CONFIG
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case "${1:-}" in
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generate|force-generate)
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[ -n "${2:-}" ] && CONFIG=$2
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# only barf if the config file specifies anything else than MAILADDR
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if egrep -qv '^(MAILADDR.*|#.*|)$' $CONFIG 2>/dev/null; then
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echo "E: $ME: $CONFIG already exists." >&2
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exit 255
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fi
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mkdir --parent ${CONFIG%/*}
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exec >$CONFIG
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;;
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esac
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cat <<_eof
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# mdadm.conf
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#
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# !NB! Run update-initramfs -u after updating this file.
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# !NB! This will ensure that initramfs has an uptodate copy.
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#
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# Please refer to mdadm.conf(5) for information about this file.
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#
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# by default (built-in), scan all partitions (/proc/partitions) and all
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# containers for MD superblocks. alternatively, specify devices to scan, using
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# wildcards if desired.
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#DEVICE ${DEVICE:-partitions containers}
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# automatically tag new arrays as belonging to the local system
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HOMEHOST ${HOMEHOST:-<system>}
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# instruct the monitoring daemon where to send mail alerts
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MAILADDR ${MAILADDR:-root}
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_eof
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if [ -n "${PROGRAM:-}" ]; then
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cat <<-_eof
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# program to run when mdadm monitor detects potentially interesting events
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PROGRAM ${PROGRAM}
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_eof
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fi
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error=0
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if [ ! -r /proc/mdstat ]; then
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echo W: $ME: MD subsystem is not loaded, thus I cannot scan for arrays. >&2
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error=1
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elif [ ! -r /proc/partitions ]; then
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echo W: $ME: /proc/partitions cannot be read, thus I cannot scan for arrays. >&2
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error=2
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else
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echo "# definitions of existing MD arrays"
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if ! $MDADM --examine --scan --config=partitions; then
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error=$(($? + 128))
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echo W: $ME: failed to scan for partitions. >&2
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echo "### WARNING: scan failed."
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else
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echo
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fi
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fi
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if [ -z "${SOURCE_DATE_EPOCH:-}" ]; then
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echo "# This configuration was auto-generated on $(date -R) by mkconf"
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else
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echo "# This configuration was auto-generated on $(date -R --utc -d@$SOURCE_DATE_EPOCH) by mkconf"
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fi
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exit $error
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