diff --git a/inc/crt/linux/syslog.bi b/inc/crt/linux/syslog.bi
new file mode 100644
index 0000000000..5970670e70
--- /dev/null
+++ b/inc/crt/linux/syslog.bi
@@ -0,0 +1,79 @@
+#ifndef __FB_UNIX__
+#error "This interface is only defined on *nix systems."
+#endif
+
+#ifndef __SYS_SYSLOG_BI__
+#define __SYS_SYSLOG_BI__ -1
+
+#define	LOG_EMERG	0	'system is unusable
+#define	LOG_ALERT	1	'action must be taken immediately
+#define	LOG_CRIT	2	'critical conditions
+#define	LOG_ERR		3	'error conditions
+#define	LOG_WARNING	4	'warning conditions
+#define	LOG_NOTICE	5	'normal but significant condition
+#define	LOG_INFO	6	'informational
+#define	LOG_DEBUG	7	'debug-level messages
+
+#define	LOG_PRIMASK	&h07	'mask to extract priority part (internal)
+#define	LOG_PRI(p)	((p) AND LOG_PRIMASK) 'extract priority
+#define	LOG_MAKEPRI(fac, pri)	(((fac)  shl  3) OR (pri))
+
+'facility codes
+#define	LOG_KERN	(0 shl 3)	'kernel messages
+#define	LOG_USER	(1 shl 3)	'random user-level messages
+#define	LOG_MAIL	(2 shl 3)	'mail system
+#define	LOG_DAEMON	(3 shl 3)	'system daemons
+#define	LOG_AUTH	(4 shl 3)	'security/authorization messages
+#define	LOG_SYSLOG	(5 shl 3)	'messages generated internally by syslogd
+#define	LOG_LPR		(6 shl 3)	'line printer subsystem
+#define	LOG_NEWS	(7 shl 3)	'network news subsystem
+#define	LOG_UUCP	(8 shl 3)	'UUCP subsystem
+#define	LOG_CRON	(9 shl 3)	'clock daemon
+#define	LOG_AUTHPRIV	(10 shl 3)	'security/authorization messages (private)
+#define	LOG_FTP		(11 shl 3)	'ftp daemon
+
+'other codes through 15 reserved for system use
+#define	LOG_LOCAL0	(16 shl 3)	'reserved for local use
+#define	LOG_LOCAL1	(17 shl 3)	'reserved for local use
+#define	LOG_LOCAL2	(18 shl 3)	'reserved for local use
+#define	LOG_LOCAL3	(19 shl 3)	'reserved for local use
+#define	LOG_LOCAL4	(20 shl 3)	'reserved for local use
+#define	LOG_LOCAL5	(21 shl 3)	'reserved for local use
+#define	LOG_LOCAL6	(22 shl 3)	'reserved for local use
+#define	LOG_LOCAL7	(23 shl 3)	'reserved for local use
+
+#define	LOG_NFACILITIES	24	'current number of facilities
+#define	LOG_FACMASK	&h03f8	'mask to extract facility part
+
+'facility of pri
+#define	LOG_FAC(p)	(((p) AND LOG_FACMASK) SHR 3)
+
+'arguments to setlogmask.
+#define	LOG_MASK(pri)	(1 SHL (pri))		'mask for one priority
+#define	LOG_UPTO(pri)	((1 SHL ((pri)+1)) - 1)	'all priorities through pri
+
+'Option flags for openlog.
+#define	LOG_PID		&h01	'log the pid with each message
+#define	LOG_CONS	&h02	'log on the console if errors in sending
+#define	LOG_ODELAY	&h04	'delay open until first syslog() (default)
+#define	LOG_NDELAY	&h08	'don't delay open
+#define	LOG_NOWAIT	&h10	'don't wait for console forks: DEPRECATED
+#define	LOG_PERROR	&h20	'log to stderr as well
+
+extern "C"
+
+'Close connection to system logger.
+declare sub closelog()
+
+'Open connection to system logger.
+declare sub openlog (byval __ident as const zstring ptr, byval __option as integer, byval __facility as integer )
+
+'Set the log mask level
+declare function setlogmask( byval __mask as integer ) as integer
+
+'Generate a log message using FMT string and option arguments.
+declare sub syslog( byval __pri as integer, byval __fmt as const zstring ptr, ... )
+
+end extern
+
+#endif '__SYS_SYSLOG_BI__