pam_vsyslog (3) Linux Manual Page
pam_syslog, pam_vsyslog – send messages to the system logger
Synopsis
#include <security/pam_ext.h>
#include <syslog.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_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(8)
Standards
The pam_syslog and pam_vsyslog functions are Linux-PAM extensions.