PAM_OPEN_SESSION(3) App. Programmers Manual PAM_OPEN_SESSION(3)
pam_open/close_session - PAM session management
int pam_open_session(pam_handle_t *pamh, int flags);
int pam_close_session(pam_handle_t *pamh, int flags);
PAM provides management-hooks for the initialization and termination of
Use this function to signal that an authenticated user session
has begun. It should be called only after the user is properly
identified and (where necessary) has been granted their creden
tials with pam_authenticate(3) and pam_setcred(3) respectively.
Some types of functions associated with session initialization
are logging for the purposes of system-audit and mounting direc
tories (the users home directory for example). These should not
concern the application. It should be noted that the effective
uid, geteuid(2), of the application should be of sufficient
privilege to perform such tasks.
Use this function to signal that a user session has terminated.
In general this function may not need to be located in the same
application as the initialization function, pam_open_session.
Typically, this function will undo the actions of pam_open_ses
sion. That is, log audit information concerning the end of the
user session or unmount the users home directory. Apart from
having sufficient privilege the details of the session termina
tion should not concern the calling application. It is good pro
gramming practice, however, to cease acting on behalf of the
user on returning from this call.
A successful return from the session management functions will be indi
cated with PAM_SUCCESS.
The specific error indicating a failure to open or close a session is
PAM_SESSION_ERR. In general other return values may be returned. They
should be treated as indicating failure.
May be translated to text with pam_strerror(3).
OSF-RFC 86.0, October 1995.
pam_start(3), pam_authenticate(3), pam_setcred(3), pam_get_item(3),
pam_strerror(3) and pam(3).
Also, see the three Linux-PAM Guides, for System administrators, module
developers, and application developers.
Linux-PAM 0.55 1997 Jan 4 PAM_OPEN_SESSION(3)