mirror of
https://github.com/schoebel/mars
synced 2024-12-22 22:53:41 +00:00
51 lines
1.2 KiB
Bash
51 lines
1.2 KiB
Bash
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#!/bin/bash
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# This is a trivial script for testing.
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#
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# Beside some trivial dd write load generator,
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# it may occupy the mount point for some time,
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# simulating a badly terminating process so that umount
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# cannot work immediately, but needs to be restarted
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# somewhat later.
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#
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# When this script is killed from "systemctl stop", the
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# "sleep" sub-process will _not_ be killed, but terminate
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# a little bit later. This leads to a race condition with lsof,
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# similar to some observed practical daemon behaviour.
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# Important: set pwd to occupy the mountpoint, also for sub-processes
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cd "$1" || exit $?
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# End writing after a while => allow for reaching UpToDate
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nr_load="${2:-5}"
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# 2-edge handshake protocol
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start_flag=run-the-load.flag
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running_flag=load-is-running.flag
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if [[ -e $start_flag ]]; then
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exit 0
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fi
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: > $start_flag
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: > $running_flag
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{
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testfile=dummy-testfile.zero
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while [[ -e $start_flag ]] && [[ -e $running_flag ]]; do
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# do not write too much, for reasonable testing of KASAN kernels
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if (( nr_load-- > 0 )); then
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dd if=/dev/zero of=$testfile bs=1k count=1001
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else
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touch $testfile
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fi
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sleep $(( RANDOM * 5 / 32767 )) &
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wait
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done
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rm -f $running_flag
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} &
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exit 0
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