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43 lines
1.5 KiB
Markdown
43 lines
1.5 KiB
Markdown
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---
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layout: default
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title: "FAQ: How can I call a script before or after each rsync operation?"
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---
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The issue with this quite frequent request is, by itself it complicates error handling a lot. What should Lsyncd do, when the script fails that it ought to run after each rsync call? If it should recall the post script it would require a new state for each rsync event which would complicate Lsyncd code quite a bit.
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The easiest way to get around this, is by replacing the rsync binary Lsyncd calls by a script from you, that calls rsync and does whatever you want to do, when rsync completes. The only thing to take care is that Lsyncd communicates with rsync using stdin/out/err-pipes and thus better not interfere with these.
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Also take care the script properly forwards the exit code rsync returned.
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This is an example bash script to wrap around rsync:
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{% highlight shell %}
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#!/bin/bash
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/usr/bin/rsync "$@"
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result=$?
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(
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if [ $result -eq 0 ]; then
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echo "my commands";
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fi
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) >/dev/null 2>/dev/null </dev/null
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exit $result
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{% endhighlight %}
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It does not do error handling for post commands. If you need this, you'll have to code them here fitting your requirements.
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Above script can be used as rsync wrapper replacement like this:
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{% highlight lua %}
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sync {
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default.rsync,
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source = "/path/to/source",
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target = "targethost::targetdir",
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rsync = {
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binary = "/path/to/bash/handler.sh"
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}
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}
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{% endhighlight %}
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## [‹‹ back to FAQ index](../)
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