pam_sm_open_session, pam_sm_close_session - service provider implementation for pam_open_session and pam_close_session

cc [ flag ... ]  file ... -lpam [ library ... ]
#include <security/pam_appl.h>
#include <security/pam_modules.h>
int pam_sm_open_session(pam_handle_t *pamh, int flags,

int argc, const char **argv);

int pam_sm_close_session(pam_handle_t *pamh, int flags,

int argc, const char **argv);

In response to a call to pam_open_session(3PAM) and pam_close_session(3PAM), the PAM framework calls pam_sm_open_session() and pam_sm_close_session(), respectively from the modules listed in the pam.conf(5) file. The session management provider supplies the back-end functionality for this interface function.

The pam_sm_open_session() function is called to initiate session management. The pam_sm_close_session() function is invoked when a session has terminated. The argument pamh is an authentication handle. The following flag may be set in the flags field:


Session service should not generate any messages.

The argc argument represents the number of module options passed in from the configuration file pam.conf(5). argv specifies the module options, which are interpreted and processed by the session management service. If an unknown option is passed in, an error should be logged through syslog(3C) and the option ignored.

Upon successful completion, PAM_SUCCESS should be returned. The following values may also be returned upon error:


Cannot make or remove an entry for the specified session.


Ignore underlying session module regardless of whether the control flag is required, optional or sufficient.

See attributes(7) for description of the following attributes:

Interface Stability Stable
MT-Level MT-Safe with exceptions

syslog(3C), libpam(3LIB), pam(3PAM), pam_open_session(3PAM), pam.conf(5), attributes(7)

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

June 20, 2021 OmniOS