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Date: Mon, 14 May 2012 00:11:06 -0400
From: Rich Felker <>
Subject: Re: make -i with linux-pam

On Sun, May 13, 2012 at 08:58:24PM -0700, Isaac Dunham wrote:
> .libs/pam_group.o: In function `check_account':
> pam_group.c:(.text+0x12fe): undefined reference to `innetgr'

This can be solved with a stub implementation the netgr stuff (all
functions behave as if there are no netgroups defined).

> pam_lastlog.c: In function ‘last_login_read’:
> pam_lastlog.c:167: error: ‘_PATH_LASTLOG’ undeclared (first use in this function)


> pam_namespace.h:169: error: ‘LOGIN_NAME_MAX’ undeclared here (not in a function)


> ../../libpam/include/security/pam_modutil.h:57: note: expected ‘const char *’ but argument is of type ‘const char **’
> pam_namespace.c:551: warning: format ‘%s’ expects type ‘char *’, but argument 4 has type ‘const char **’

This sounds bad; any idea what the cause is?

> opasswd.c: In function ‘compare_password’:
> opasswd.c:102: error: storage size of ‘output’ isn’t known
> opasswd.c:106: warning: implicit declaration of function ‘crypt_r’
> opasswd.c:102: warning: unused variable ‘output’

The code is there but has no exposed interface...

> .libs/pam_rhosts.o: In function `pam_sm_authenticate':
> pam_rhosts.c:(.text+0x36c): undefined reference to `ruserok'

This is junk... insecure legacy rhosts stuff. Can it be disabled?
Adding code to support it seems bad.

> pam_unix_passwd.c:57:21: error: rpc/rpc.h: No such file or directory

This would need an external rpc implementation, but I question why
unix_passwd support needs rpc to begin with...

> In file included from pam_unix_passwd.c:79:
> yppasswd.h:48: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘xdr_xpasswd’
> yppasswd.h:49: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘xdr_yppasswd’

Ugly NIS stuff...

> passverify.c: In function ‘unix_update_passwd’:
> passverify.c:794: warning: implicit declaration of function ‘putpwent’

Should not be hard to add.

Basically the problems break down into:
- missing crypt_r public interface
- missing NIS/RPC
- missing rhosts stuff
- missing netgroup stuff
- a few minor header file issues


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