syslog.c,v

来自「TCP-IP红宝书源代码」· C,V 代码 · 共 75 行

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date	97.09.21.19.29.30;	author dls;	state Dist;
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@/* syslog.c - syslog */

#include <conf.h>
#include <kernel.h>
#include <network.h>
#include <io.h>
#include <syslog.h>

#ifdef	LOGHOST
char	*loghost = LOGHOST;
#else
char	*loghost = 0;
#endif

static int	logdev = BADDEV;
static char	logbuf[LOG_MAXLEN+10]; /* mesg. + room for <#.> & null	*/

extern int	currpid;

/*------------------------------------------------------------------------
 * syslog - log messages to a remote UNIX syslogd or the console
 *------------------------------------------------------------------------
 */
int
syslog(where, pname, fmt, a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15)
int	where;
char	*pname, *fmt;
int	a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,a12,a13,a14,a15;
{
	int	len;

	if (loghost == 0)
		return kprintf(fmt, a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,					a12,a13,a14,a15);
	if (logdev == BADDEV) {
		logdev = open(UDP, LOGHOST, ANYLPORT);
		if (logdev == SYSERR)
			return SYSERR;
		control(logdev, DG_SETMODE, DG_DMODE);
	}
	sprintf(logbuf, "<%d>", where);
	len = strlen(logbuf);
	sprintf(&logbuf[len], "%s[%u]: ", pname, currpid);
	len = strlen(logbuf);
	sprintf(&logbuf[len], fmt, a1,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,
		a12,a13,a14,a15);
	len = strlen(logbuf);
	logbuf[len++] = '\n';
	logbuf[len] = '\0';
	return write(logdev, logbuf, len);
}
@