12 lines
343 B
Bash
Executable File
12 lines
343 B
Bash
Executable File
#!/bin/sh
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# it is in format of `date -u -Iseconds`, example: 2014-09-29T22:59:21+0000
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# it comes from dom0, so is trusted
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read timestamp
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timediff=$(( `date -u +'+%Y%m%d%H%M%S'` - `date -u -d "$timestamp" +'+%Y%m%d%H%M%S'` ))
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if [ $timediff -le 2 -a $timediff -ge -2 ]; then
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# don't bother
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exit 0
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fi
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date -u -s "$timestamp" >/dev/null
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