syslog(3) Library Functions Manual syslog(3)
Name
syslog, openlog, closelog - control system log
Syntax
#include <syslog.h>
openlog(ident, logstat)
char *ident;
void syslog(priority, message, parameters ... )
char *message;
void closelog()
Description
The subroutine arranges to write the message onto the system log maintained by The message is tagged with priority and it looks like a
string except that %m is replaced by the current error message (collected from A trailing new line is added if needed. This message is
read by and output to the system console or files as appropriate. The maximum number of parameters is 5.
If special processing is needed, can be called to initialize the log file. Parameters are ident which is prepended to every message, and
logstat which is a bit field indicating special status; current values are:
LOG_PID log the process id with each message; useful for identifying daemons.
The returns zero on success. If it cannot open the file it writes on instead and returns -1.
The can be used to close the log file.
Examples
syslog(LOG_SALERT, "who: internal error 23");
openlog("serverftp", LOG_PID);
syslog(LOG_INFO, "Connection from host %d", CallingHost);
See Also
syslog(8)
syslog(3)
