07-17-2013
One question per thread.
The answers to all of your questions are in the sh, ls/stat, and cat manual pages, respectively.
Regards,
Alister
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LEARN ABOUT NETBSD
pam_get_user
PAM_GET_USER(3) BSD Library Functions Manual PAM_GET_USER(3)
NAME
pam_get_user -- retrieve user name
LIBRARY
Pluggable Authentication Module Library (libpam, -lpam)
SYNOPSIS
#include <sys/types.h>
#include <security/pam_appl.h>
int
pam_get_user(pam_handle_t *pamh, const char **user, const char *prompt);
DESCRIPTION
The pam_get_user function returns the name of the target user, as specified to pam_start(3). If no user was specified, nor set using
pam_set_item(3), pam_get_user will prompt for a user name. Either way, a pointer to the user name is stored in the location pointed to by
the user argument.
The prompt argument specifies a prompt to use if no user name is cached. If it is NULL, the PAM_USER_PROMPT item will be used. If that item
is also NULL, a hardcoded default prompt will be used. Either way, the prompt is expanded using openpam_subst(3) before it is passed to the
conversation function.
If pam_get_user is called from a module and the user_prompt option is set in the policy file, the value of that option takes precedence over
both the prompt argument and the PAM_USER_PROMPT item.
RETURN VALUES
The pam_get_user function returns one of the following values:
[PAM_BUF_ERR] Memory buffer error.
[PAM_CONV_ERR] Conversation failure.
[PAM_SYSTEM_ERR] System error.
SEE ALSO
openpam_subst(3), pam(3), pam_get_authtok(3), pam_get_item(3), pam_set_item(3), pam_start(3), pam_strerror(3)
STANDARDS
X/Open Single Sign-On Service (XSSO) - Pluggable Authentication Modules, June 1997.
AUTHORS
The pam_get_user function and this manual page were developed for the FreeBSD Project by ThinkSec AS and Network Associates Laboratories, the
Security Research Division of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (``CBOSS''), as part of the DARPA CHATS
research program.
BSD
December 18, 2011 BSD