[gentoo-amd64] NIS problem

[gentoo-amd64] NIS problem

[Weicheng Pan]

 Hi all:
I meet a very strange problem on my NIS. I test two cases, which one is
a Gentoo i386 box, and the other is Gentoo AMD64 box.
I referenced this page:
http://www.linux-nis.org/nis-howto/HOWTO/settingup_client.html , and can
successfully login.

But when my directory has unknown UID on AMD64 box, it will return a
SEGMENTATION FAULT error.

Then I use the following code to verify the client settings:

#include <stdio.h>
#include <pwd.h>
#include <sys/types.h>

int
main(int argc, char *argv[])
{
  struct passwd *pwd;

  if(argc != 2)
    {
      fprintf(stderr,"Usage: getwpnam username\n");
      exit(1);
    }

  pwd=getpwnam(argv[1]);

  if(pwd != NULL)
    {
      printf("name.....: [%s]\n",pwd->pw_name);
      printf("password.: [%s]\n",pwd->pw_passwd);
      printf("user id..: [%d]\n", pwd->pw_uid);
      printf("group id.: [%d]\n",pwd->pw_gid);
      printf("gecos....: [%s]\n",pwd->pw_gecos);
      printf("directory: [%s]\n",pwd->pw_dir);
      printf("shell....: [%s]\n",pwd->pw_shell);
    }
  else
    fprintf(stderr,"User \"%s\" not found!\n",argv[1]);

  exit(0);
}

Finally, I found that getpwnam() call will cause segmentation fault
rather than return NULL on pass a non-exist username on AMD64 box.

Is anybody has encounter this situation?

Regards,
Weicheng.

-- 
gentoo-amd64@gentoo.org mailing list

Re: [gentoo-amd64] NIS problem

[Steve Herber]

I think I have run into this problem in the past but in a different
way.  I found some upgrade processes would fail and a strace pointed
to libnss_nis.o.  To work around it I would temporally remove the nis
entry from my/etc/nsswitch.conf file.

My problems have cleared up over the past year.  I attributed them to
bugs in libnss_nis.

I have not run into your specific problem.  I seldom reference UID's
that are not in my NIS system or in the local /etc/password file.

Good luck,

Steve Herber	herber@thing.com		work: 206-221-7262
Security Engineer, UW Medicine, IT Services	home: 425-454-2399

On Wed, 26 Oct 2005, Weicheng Pan wrote:

> Hi all:
> I meet a very strange problem on my NIS. I test two cases, which one is
> a Gentoo i386 box, and the other is Gentoo AMD64 box.
> I referenced this page:
> http://www.linux-nis.org/nis-howto/HOWTO/settingup_client.html , and can
> successfully login.
>
> But when my directory has unknown UID on AMD64 box, it will return a
> SEGMENTATION FAULT error.
>
> Then I use the following code to verify the client settings:
>
> Finally, I found that getpwnam() call will cause segmentation fault
> rather than return NULL on pass a non-exist username on AMD64 box.
>
> Is anybody has encounter this situation?
>
> Regards,
> Weicheng.
>
> -- 
> gentoo-amd64@gentoo.org mailing list
>
-- 
gentoo-amd64@gentoo.org mailing list