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pam_get_user(3) [netbsd man page]

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

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pam_get_user(3PAM)					       PAM Library Functions						pam_get_user(3PAM)

NAME
pam_get_user - PAM routine to retrieve user name SYNOPSIS
cc [ flag ... ] file ... -lpam [ library ... ] #include <security/pam_appl.h> int pam_get_user(pam_handle_t *pamh, char **user, const char *prompt); DESCRIPTION
The pam_get_user() function is used by PAM service modules to retrieve the current user name from the PAM handle. If the user name has not been set with pam_start() or pam_set_item(), the PAM conversation function will be used to prompt the user for the user name with the string "prompt". If prompt is NULL, then pam_get_item() is called and the value of PAM_USER_PROMPT is used for prompting. If the value of PAM_USER_PROMPT is NULL, the following default prompt is used: Please enter user name: After the user name is gathered by the conversation function, pam_set_item() is called to set the value of PAM_USER. By convention, appli- cations that need to prompt for a user name should call pam_set_item() and set the value of PAM_USER_PROMPT before calling pam_authenti- cate(). The service module's pam_sm_authenticate() function will then call pam_get_user() to prompt for the user name. Note that certain PAM service modules, such as a smart card module, may override the value of PAM_USER_PROMPT and pass in their own prompt. Applications that call pam_authenticate() multiple times should set the value of PAM_USER to NULL with pam_set_item() before calling pam_authenticate(), if they want the user to be prompted for a new user name each time. The value of user retrieved by pam_get_user() should not be modified or freed. The item will be released by pam_end(). RETURN VALUES
Upon success, pam_get_user() returns PAM_SUCCESS; otherwise it returns an error code. Refer to pam(3PAM) for information on error related return values. ATTRIBUTES
See attributes(5) for description of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability | Stable | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe with exceptions | +-----------------------------+-----------------------------+ SEE ALSO
pam(3PAM), pam_authenticate(3PAM), pam_end(3PAM), pam_get_item(3PAM), pam_set_item(3PAM), pam_sm(3PAM), pam_sm_authenticate(3PAM), pam_start(3PAM), attributes(5) NOTES
The interfaces in libpam are MT-Safe only if each thread within the multithreaded application uses its own PAM handle. SunOS 5.11 13 Oct 1998 pam_get_user(3PAM)
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