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Description of problem:
Queries don't match unless the request is all lower-case and should be case-insensitive to match Solaris client behavior.

Version-Release number of selected component (if applicable):
rpm

How reproducible:
Always

Steps to Reproduce:
1. Setup hosts map in NIS

Actual results:
Match only if using lower case

Expected results:
Match with any case

Additional info:

# cat /var/yp/maps/hosts 
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.10 NAME1.EXAMPLE.LOCAL NAME1
192.168.1.11 name2.example.local name2
192.168.1.12 nAmE3.eXaMpLe.LoCaL nAmE3

# ypmatch name1 hosts
192.168.1.10 NAME1.EXAMPLE.LOCAL NAME1

# ypmatch name2 hosts
192.168.1.11 name2.example.local name2

# ypmatch name3 hosts
192.168.1.12 nAmE3.eXaMpLe.LoCaL nAmE3  

# ypmatch NAME1 hosts
Can't match key NAME1 in map hosts.byname. Reason: No such key in map

# ypmatch NAME2 hosts
Can't match key NAME2 in map hosts.byname. Reason: No such key in map

# ypmatch nAmE3 hosts
Can't match key nAmE3 in map hosts.byname. Reason: No such key in map

Thanks for the report.

Will take a look at this. Since ypserv returns a proper response for mixed case hosts entry even when lowercase key is used for ypmatch, transforming the input key to lowercase before sending the request will likely do the trick.

Actually not as easy of a fix as first thought since transforming every key to lowercase before calling ypmatch would break other map lookups as they could be case sensitive.

Created attachment 1378489 [details]
proposed patch

Proposed a fix upstream:
https://github.com/thkukuk/libnsl/pull/7

Also attaching the same fix for our version of NIS.

Also to work around the issue one can remove makedbm's `-l` option inside the Makefile used to generate the maps (hosts.byname rule). This will make sure the keys inside the maps will not get transformed to lowercase when they are built from the source files.