debian man page for pam_vsyslog

PAM_SYSLOG(3)							 Linux-PAM Manual						     PAM_SYSLOG(3)

NAME
       pam_syslog, pam_vsyslog - send messages to the system logger

SYNOPSIS
       #include <syslog.h>

       #include <security/pam_ext.h>

       void pam_syslog(pam_handle_t *pamh, int priority, const char *fmt, ...);

       void pam_vsyslog(pam_handle_t *pamh, int priority, const char *fmt, va_list args);

DESCRIPTION
       The pam_syslog function logs messages using syslog(3) and is intended for internal use by Linux-PAM and PAM service modules. The priority
       argument is formed by ORing the facility and the level values as documented in the syslog(3) manual page.

       The pam_vsyslog function performs the same task as pam_syslog() with the difference that it takes a set of arguments which have been
       obtained using the stdarg(3) variable argument list macros.

SEE ALSO
       pam(7)

STANDARDS
       The pam_syslog and pam_vsyslog functions are Linux-PAM extensions.

Linux-PAM Manual						    06/04/2011							     PAM_SYSLOG(3)