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PAM_GET_USER(3)       DragonFly Library Functions Manual       PAM_GET_USER(3)


NAME

     pam_get_user - retrieve user name


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, and the corresponding PAM item is updated.

     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.  Additionally, when
     pam_get_user() is called from a service module, the prompt may be
     affected by module options as described below.  The prompt is then
     expanded using openpam_subst(3) before it is passed to the conversation
     function.


MODULE OPTIONS

     When called by a service module, pam_get_user() will recognize the
     following module options:

     user_prompt         Prompt to use when asking for the user name.  This
                         option overrides both the prompt argument and the
                         PAM_USER_PROMPT item.


RETURN VALUES

     The pam_get_user() function returns one of the following values:

     [PAM_SUCCESS]       Success.

     [PAM_BAD_ITEM]      Unrecognized or restricted item.

     [PAM_BUF_ERR]       Memory buffer error.

     [PAM_CONV_ERR]      Conversation failure.

     [PAM_SYSTEM_ERR]    System error.


SEE ALSO

     openpam_get_option(3), openpam_subst(3), pam(3), pam_conv(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.

     The OpenPAM library is maintained by Dag-Erling Smorgrav <des@des.no>.

DragonFly 6.1-DEVELOPMENT      February 24, 2019     DragonFly 6.1-DEVELOPMENT

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