MySQL Bugs: #84157: improve feedback for invalid mysqld command line arguments

Bug #84157	improve feedback for invalid mysqld command line arguments
Submitted:	10 Dec 2016 20:33	Modified:	19 Dec 2016 14:45
Reporter:	Karl-Philipp Richter	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: Errors	Severity:	S3 (Non-critical)
Version:	5.7.16	OS:	Any
Assigned to:		CPU Architecture:	Any

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Description:
`mysqld` gives helpful feedback on most invalid command line arguments, but some, like `/usr/sbin/mysqld --datadir=/tmp/xz --initialize --verbose` don't do anything, but just fail with returncode 1.

experienced with 5.7.16-0ubuntu0.16.10.1 on Ubuntu 16.10

How to repeat:
`/usr/sbin/mysqld --datadir=/tmp/xz --initialize --verbose`

Hello Karl-Philipp Richter,

Thank you for the report and feedback!

Thanks,
Umesh