mirror of
https://github.com/systemd/systemd.git
synced 2024-12-23 21:35:11 +03:00
48 lines
1.2 KiB
Bash
Executable File
48 lines
1.2 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
# SPDX-License-Identifier: LGPL-2.1-or-later
|
|
set -eux
|
|
set -o pipefail
|
|
|
|
PINNED="$1"
|
|
COUNTER="/tmp/fdstore-invoked.$PINNED"
|
|
FILE="/tmp/fdstore-data.$PINNED"
|
|
|
|
# This script is called six times: thrice from a service unit where the fdstore
|
|
# is pinned, and thrice where it isn't. The second iteration of each series is
|
|
# a restart, the third a stop followed by a start
|
|
|
|
if [ -e "$COUNTER" ] ; then
|
|
read -r N < "$COUNTER"
|
|
else
|
|
N=0
|
|
fi
|
|
|
|
echo "Invocation #$N with PINNED=$PINNED."
|
|
|
|
if [ "$N" -eq 0 ] ; then
|
|
# First iteration
|
|
test "${LISTEN_FDS:-0}" -eq 0
|
|
test ! -e "$FILE"
|
|
echo waldi > "$FILE"
|
|
systemd-notify --fd=3 --fdname="fd-$N-$PINNED" 3< "$FILE"
|
|
elif [ "$N" -eq 1 ] || { [ "$N" -eq 2 ] && [ "$PINNED" -eq 1 ]; } ; then
|
|
# Second iteration, or iteration with pinning on
|
|
test "${LISTEN_FDS:-0}" -eq 1
|
|
# We reopen fd #3 here, so that the read offset is at zero each time (hence no <&3 here…)
|
|
read -r word < /proc/self/fd/3
|
|
test "$word" = "waldi"
|
|
else
|
|
test "${LISTEN_FDS:-0}" -eq 0
|
|
test -e "$FILE"
|
|
fi
|
|
|
|
if [ "$N" -ge 2 ] ; then
|
|
rm "$COUNTER" "$FILE"
|
|
else
|
|
echo $((N + 1)) > "$COUNTER"
|
|
fi
|
|
|
|
systemd-notify --ready --status="Ready"
|
|
|
|
exec sleep infinity
|