static char sccsid
[] = "@(#)syslog.c 4.4 (Berkeley) %G%";
* SYSLOG -- print message on log file
* This routine looks a lot like printf, except that it
* outputs to the log file instead of the standard output.
* prints the module name in front of the message,
* has some other formatting types (or will sometime),
* adds a newline on the end of the message.
* The output of this routine is intended to be read by /etc/syslogd.
* Modified to use UNIX domain IPC by Ralph Campbell
#define MAXLINE 1024 /* max message size */
#define NULL 0 /* manifest */
static char logname
[] = "/dev/log";
static char ctty
[] = "/dev/console";
static int LogFile
= -1; /* fd for log */
static int LogStat
= 0; /* status bits, set by openlog() */
static char *LogTag
= NULL
; /* string to tag the entry with */
static int LogMask
= LOG_DEBUG
; /* lowest priority to be logged */
static struct sockaddr SyslogAddr
;
extern int errno
, sys_nerr
;
extern char *sys_errlist
[];
syslog(pri
, fmt
, p0
, p1
, p2
, p3
, p4
)
char buf
[MAXLINE
+ 1], outline
[MAXLINE
+ 1];
register char *b
, *f
, *o
;
int pid
, olderrno
= errno
;
/* see if we should just throw out this message */
if (pri
< LOG_ALERT
|| pri
> LogMask
)
sprintf(o
, "[%d]", getpid());
sprintf(o
, ": %.15s-- ", ctime(&now
) + 4);
while ((c
= *f
++) != '\0' && c
!= '\n' && b
< &buf
[MAXLINE
]) {
if ((unsigned)olderrno
> sys_nerr
)
sprintf(b
, "error %d", olderrno
);
strcpy(b
, sys_errlist
[olderrno
]);
sprintf(o
, buf
, p0
, p1
, p2
, p3
, p4
);
if (sendto(LogFile
, outline
, c
, 0, &SyslogAddr
, sizeof SyslogAddr
) >= 0)
LogFile
= open(ctty
, O_RDWR
);
write(LogFile
, outline
, c
);
while ((c
= wait((int *)0)) > 0 && c
!= pid
)
* OPENLOG -- open system log
openlog(ident
, logstat
, logmask
)
LogTag
= (ident
!= NULL
) ? ident
: "syslog";
if (logmask
> 0 && logmask
<= LOG_DEBUG
)
SyslogAddr
.sa_family
= AF_UNIX
;
strncpy(SyslogAddr
.sa_data
, logname
, sizeof SyslogAddr
.sa_data
);
LogFile
= socket(AF_UNIX
, SOCK_DGRAM
, 0);
fcntl(LogFile
, F_SETFD
, 1);
* CLOSELOG -- close the system log
* SETLOGMASK -- set the log mask level
if (pri
> 0 && pri
<= LOG_DEBUG
)