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 will be used. If that item is also
NULL, a hardcoded default prompt will be used.