How does syslog-ng validate the header?

StackOverflow https://stackoverflow.com/questions/8605259

  •  27-03-2021
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Question

I am wondering how syslog-ng validates that the header is in the correct format (pri, timestamp, hostname). Does it use regular expressions for this purpose?

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Solution

no, it uses a handwritten parser for this purpose. it's in the syslogformat plugin in 3.3 and was in logmsg.c earlier.

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