pam_chauthtok(3PAM)					       PAM Library Functions					       pam_chauthtok(3PAM)

NAME

       pam_chauthtok - perform password related functions within the PAM framework

SYNOPSIS

       cc [ flag ... ] file ... -lpam [ library ... ]
       #include <security/pam_appl.h>

       int pam_chauthtok(pam_handle_t *pamh, const intflags);

DESCRIPTION

       The  pam_chauthtok()  function is called to change the authentication token associated with a particular user referenced by the authentica-
       tion handle pamh.

       The following flag may be passed in to pam_chauthtok():

       PAM_SILENT		       The password service should not generate any messages.

       PAM_CHANGE_EXPIRED_AUTHTOK      The password service should only update those passwords that have aged. If this flag  is  not  passed,  all
				       password services should update their passwords.

       Upon  successful completion of the call, the authentication token of the user will be changed in accordance with the  password service con-
       figured in the system through pam.conf(4).

RETURN VALUES

       Upon successful completion,  PAM_SUCCESS is returned. In addition to the error return values described in pam(3PAM), the  following  values
       may be returned:

       PAM_PERM_DENIED		       No permission.

       PAM_AUTHTOK_ERR		       Authentication token manipulation error.

       PAM_AUTHTOK_RECOVERY_ERR        Authentication information cannot be recovered.

       PAM_AUTHTOK_LOCK_BUSY	       Authentication token lock busy.

       PAM_AUTHTOK_DISABLE_AGING       Authentication token aging disabled.

       PAM_USER_UNKNOWN 	       User unknown to password service.

       PAM_TRY_AGAIN		       Preliminary check by password service failed.

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

       login(1), passwd(1), pam(3PAM), pam_authenticate(3PAM), pam_start(3PAM), attributes

NOTES

       The  flag  PAM_CHANGE_EXPIRED_AUTHTOK  is  typically used by a  login application which has determined that the user's password has aged or
       expired. Before allowing the user to login, the login application may invoke pam_chauthtok() with this flag to allow the user to update the
       password. Typically, applications such as passwd(1) should not use this flag.

       The pam_chauthtok() functions performs a preliminary check before attempting to update passwords. This check is performed for each password
       module in the stack as listed in  pam.conf(4). The check may include pinging remote name services to determine if they  are  available.	If
       pam_chauthtok() returns PAM_TRY_AGAIN, then the check has failed, and passwords are not updated.

       The interfaces in  libpam are MT-Safe only if each thread within the multithreaded application uses its own  PAM handle.

SunOS 5.10							    13 Oct 1998 					       pam_chauthtok(3PAM)