Re: perl or libc6 bug?: getpwnam('root') in NIS environment
On Wed, Apr 14, 1999 at 11:28:36PM -0400, Michael Stone wrote:
: On Thu, Apr 15, 1999 at 12:08:30AM +0200, Heiko Schlittermann wrote:
: > With mangling OFF I get the shadow entry for root from the NIS server.
: > `ypmatch root passwd' returns `no such key' or similar
: > `ypmatch root shadow.byname' returns the approbiate line from the shadow
: > file ...
: >
: > I can always lookup the shadow.byname map completly. (Not so for
: > passwd!)
: >
: > With mangling ON it's a little bit cleaner ... but not completly clean.
: > Why is the root (and other low uid) entry hidden from passwd.byname, but
: > not from shadow.byname?
:
: You're not being entirely clear here. Do ordinary users get the
: passwords when doing ypmatch on shadow.byname? Did you enable mangling
: for shadow.byname in /etc/ypserv.conf?
Mangling enabled: ordinary users get `x' for ypmatch root shadow.byname
Mangling disabled: ordinary users get 'LKDFdfaev.4' for ypmatch root shadow.byname
: As to why root's entry exists in shadow.byname, it's because the
: exclusion rules are based on uid's--which don't exist in the shadow
Ah. Understand.
With this background the above is correct.
The remaining question is:
-- NIS pw mangle -- caller ---- perl' (getpwnam('root'))[1] ----
ON root local hash
ON joe `x'
OFF root local hash
OFF joe servers hash
... the problem only exists,
-> IFF the arg of getpwnam is a user with local _and_ remote identity.
-> IFF mangling is off.
Best Regards from Dresden/Germany
Viele Gruesse aus Dresden
Heiko Schlittermann
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