Re: [ProFTPD-Devel] ProFTPd getpwnam/uid etc

[TJ S. <tj...@di...>]

dave>I am curious to know whether ProFTPd uses the OS's C library to
dave>perform user/pass lookups or whether it reads /etc/passwd or
dave>shadow directly with fgetpwXXX ?

Ummm...yes and no. =)  It depends on the module being used.  If you're
using AuthUserFile, or /etc/passwd, then mod_unixpw is responsible for
doing the lookups -- I believe it uses fgetpwent() and friends.  mod_sqlpw
in conjunction with mod_pgsql or mod_mysql, and mod_ldap, do not rely on
that. The modules provide a custom getpwnam() function.

dave>While browsing the source I cannot follow the auth sequence
dave>completely to determine whether or not the standard getpwnam and
dave>friends are being called or not.

The key will be the auth_getpwnam() et al functions.  These functions are
actually dispatcher functions, and will call the function listed in a
module's authtab.  mod_unixpw and mod_ldap provide examples of using the
authtab to override the system/library authentication functions.

dave>I make use of a custom NSS library which is called from glibc
dave>but if an application reads directly from the /etc/passwd then
dave>it obviously would not be used.

If you're using an NSS module, then mod_unixpw and the fgetpwent() calls
should work you.  If they don't...be sure to let us know. =)

Hope that helps...

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  TJ Saunders			<tj...@di...>
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