allowing shell users to change passwords

[Felix Zielcke]

Am Dienstag, den 23.06.2015, 10:48 +0000 schrieb dave at 661.org:
> Does anyone else here have a need to allow shell users to change 
> their 
> imap/pop3 passwords?  I came up with a little thing that works 
> similarly 
> to regular passwd(1), dovepasswd, which can be found at 
> https://github.com/DavidGriffith/dovepasswd. ; It does the job for me 
> and 
> I'd love for other people to take a look and give me some feedback.
> 

If you want you can add my attached script for the horde groupware and
the passwd module of it.
On my own server I'm the only ssh/shell user there.
But for friends/family I want to have them able to change the passwords
themself.
And it looks like your dovepasswd is for normal passwd files like my
horde script.
This is just a quick&dirty one but it seems to work for me.
Note that I only use SHA512-CRYPT scheme.
But feel free to improve it.
Needs to be enabled in the horde/passwd/backends.php config.
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