26 lines
512 B
Bash
26 lines
512 B
Bash
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#!/bin/bash
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LockDir="/run/$(basename "$0").run"
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P() {
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while ! mkdir "$LockDir" 2>/dev/null
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do
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echo "cannot lock $LockDir, waiting"
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LockDirStamp=$(stat -c %Y "$LockDir")
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if [ "$LockDirStamp" != "" ] && [ "$LockDirStamp" -lt $(date --date "15 seconds ago" +%s) ]
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then
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echo lock is old, deleting
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rmdir "$LockDir"
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fi
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sleep 1
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done
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echo got lock
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}
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V() {
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echo "releasing $LockDir"
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rmdir "$LockDir"
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}
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P
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echo "running protected code"
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sleep 10
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V
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echo "end protected code"
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