Hello,

I need a script that checks a password file or invalid users. I am on a Unix box and all the passwords are NIS. I just add them to a front end. But users come and go - but their passwords stay - and the list just get long.

I want to take each password - one by one - do a ypmatch on it - if it is in NIS - keep it - if not - delete it.

If possible if ypmatch comes back with a 'cracked' or 'expired' email the admin.

What I plan to do - check the list for lines beginning with "+" - do a system call with the first field (Unix ID) doing a ypmatch.

I am not sure how to interpret the out come though - is it there or not.

Anybody have suggestions on how to proceed - or aware of a library that would help with this?

i.e.
root:123456/xx.xxx:0:3::/home/root:/csh <---skip
johnny:XXXxxxXXXxxx:0:3:John Admin:/home/John:bin/csh <---skip
+dots::0:0:Support:/home/support:/bin/csh <--in NIS - keep
+user1::0:0:Hobbit Bilbo:/home/asia:/bin/csh <--in NIS - keep
+user2::0:0:Jim Bean:/home/asia:/bin/csh <--not in NIS remove
+user3::0:0:Bill Gates:/home/asia:/bin/csh <--in NIS - keep
It will write the new password file - but without user2

Thanks,
V

In reply to Password file and NIS check? by Anonymous Monk

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