Altering entered PAM username

[Julián de Navascués]

Hi all,

I wonder if it's possible to change the username inside a PAM auth module. I
would like to do something like login with a user "guest" and map it to a
real unix user account, for example "real_user" (like a switch user command,
"su real_user")...

I have tried something like this:

int pam_sm_authenticate(pam_handle_t *pamh,int flags,int argc,const char
**argv)
{

int retval = pam_set_item(pamh, PAM_USER, "real_user");

return PAM_SUCCESS;

}


Using this auth module with a ssh server I would expect to login as
"real_user" and see a prompt like real_user at machine$ and /home/real_user as
the working directory... but it does not and logs that "guest" is not a
valid unix user on the machine.

I would like to know what else is needed to map users...

Thank for your help
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/pam-list/attachments/20081120/4677cff1/attachment.htm>