1 files changed, 289 insertions, 0 deletions
diff --git a/servers/slapd/syslog.c b/servers/slapd/syslog.c
new file mode 100644
index 0000000..47ea1c6
--- /dev/null
+++ b/servers/slapd/syslog.c
@@ -0,0 +1,289 @@
+/*	$OpenBSD: syslog.c,v 1.29 2007/11/09 18:40:19 millert Exp $ */
+/*
+ * Copyright (c) 1983, 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "portable.h"
+
+#include <sys/types.h>
+#include <ac/socket.h>
+#include <ac/syslog.h>
+#include <sys/uio.h>
+#include <sys/un.h>
+#include <netdb.h>
+
+#include <ac/errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <stdio.h>
+#include <ac/string.h>
+#include <ac/time.h>
+#include <ac/unistd.h>
+#include <ac/stdarg.h>
+
+#include "slap.h"
+#include "lutil.h"
+
+static int	LogType = SOCK_DGRAM;	/* type of socket connection */
+static int	LogFile = -1;		/* fd for log */
+static int	connected;		/* have done connect */
+static int	LogStat;		/* status bits, set by openlog() */
+static const char *LogTag;		/* string to tag the entry with */
+static int	LogFacility = LOG_USER;	/* default facility code */
+
+static void disconnectlog(void);
+static void connectlog(void);
+
+static void my_localtime(const time_t *t, struct tm *tm);
+
+/*
+ * syslog
+ *	print message on log file; output is intended for syslogd(8).
+ */
+void
+syslog(int pri, const char *fmt, ...)
+{
+	va_list ap;
+	char *p, *pend;
+#define	TBUF_LEN	2048
+#define	FMT_LEN		1024
+	char tbuf[TBUF_LEN];
+	int cnt;
+	int error;
+	int tbuf_left, prlen;
+
+	va_start(ap, fmt);
+
+	/* Check for invalid bits. */
+	if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
+		if (LogTest(LOG_ERR))
+			lutil_debug(slap_debug, LOG_ERR, 
+			    "syslog: unknown facility/priority: %x", pri);
+		pri &= LOG_PRIMASK|LOG_FACMASK;
+	}
+
+	/* Set default facility if none specified. */
+	if ((pri & LOG_FACMASK) == 0)
+		pri |= LogFacility;
+
+	p = tbuf;
+	pend = p + TBUF_LEN;
+
+	*p++ = '<';
+	p += sprintf(p, "%d", pri);
+	*p++ = '>';
+
+#if 0
+	(void)time(&now);
+	my_localtime(&now, &tm);
+	p += strftime(p, tbuf_left, "%h %e %T ", &tm);
+#endif
+
+	if (LogTag != NULL) {
+		p = lutil_strcopy(p, LogTag);
+	}
+	if (LogStat & LOG_PID) {
+		*p++ = '[';
+		p += sprintf(p, "%ld", (long)getpid());
+		*p++ = ']';
+	}
+	if (LogTag != NULL) {
+		*p++ = ':';
+		*p++ = ' ';
+	}
+
+	tbuf_left = pend - p;
+	prlen = vsnprintf(p, tbuf_left, fmt, ap);
+	va_end(ap);
+	if (prlen < 0)
+		prlen = 0;
+	else if (prlen >= tbuf_left)
+		prlen = tbuf_left - 1;
+	p += prlen;
+	cnt = p - tbuf;
+
+	/* Get connected, output the message to the local logger. */
+	if (LogFile == -1)
+		openlog(LogTag, LogStat, 0);
+	connectlog();
+
+	/*
+	 * If the send() failed, there are two likely scenarios:
+	 *  1) syslogd was restarted
+	 *  2) /dev/log is out of socket buffer space
+	 * We attempt to reconnect to /dev/log to take care of
+	 * case #1 and keep send()ing data to cover case #2
+	 * to give syslogd a chance to empty its socket buffer.
+	 */
+	if ((error = send(LogFile, tbuf, cnt, 0)) < 0) {
+		if (errno != ENOBUFS) {
+			disconnectlog();
+			connectlog();
+		}
+		do {
+			usleep(1);
+			if ((error = send(LogFile, tbuf, cnt, 0)) >= 0)
+				break;
+		} while (errno == ENOBUFS);
+	}
+}
+
+static void
+disconnectlog(void)
+{
+	/*
+	 * If the user closed the FD and opened another in the same slot,
+	 * that's their problem.  They should close it before calling on
+	 * system services.
+	 */
+	if (LogFile != -1) {
+		close(LogFile);
+		LogFile = -1;
+	}
+	connected = 0;		/* retry connect */
+}
+
+static void
+connectlog(void)
+{
+	struct sockaddr_un SyslogAddr;	/* AF_UNIX address of local logger */
+
+	if (LogFile == -1) {
+		if ((LogFile = socket(AF_UNIX, LogType, 0)) == -1)
+			return;
+		(void)fcntl(LogFile, F_SETFD, FD_CLOEXEC);
+	}
+	if (LogFile != -1 && !connected) {
+		memset(&SyslogAddr, '\0', sizeof(SyslogAddr));
+#ifdef _BSD
+		SyslogAddr.sun_len = sizeof(SyslogAddr);
+#endif
+		SyslogAddr.sun_family = AF_UNIX;
+		strncpy(SyslogAddr.sun_path, _PATH_LOG,
+		    sizeof(SyslogAddr.sun_path));
+		if (connect(LogFile, (struct sockaddr *)&SyslogAddr,
+		    sizeof(SyslogAddr)) == -1) {
+			(void)close(LogFile);
+			LogFile = -1;
+		} else
+			connected = 1;
+	}
+}
+
+void
+openlog(const char *ident, int logstat, int logfac)
+{
+	if (ident != NULL)
+		LogTag = ident;
+	LogStat = logstat;
+	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
+		LogFacility = logfac;
+
+	if (LogStat & LOG_NDELAY)	/* open immediately */
+		connectlog();
+}
+
+void
+closelog()
+{
+	(void)close(LogFile);
+	LogFile = -1;
+	connected = 0;
+	LogTag = NULL;
+}
+
+#if 0
+#define	SECS_PER_HOUR	(60 * 60)
+#define	SECS_PER_DAY	(SECS_PER_HOUR * 24)
+
+/* How many days come before each month (0-12).  */
+static const unsigned short int __mon_yday[2][13] =
+  {
+    /* Normal years.  */
+    { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
+    /* Leap years.  */
+    { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
+  };
+
+/* Compute the `struct tm' representation of *T,
+   and store year, yday, mon, mday, wday, hour, min, sec into *TP */
+static void my_localtime(const time_t *t, struct tm *tm)
+{
+  time_t days, rem, y;
+  const unsigned short int *ip;
+  int leap;
+
+  days = *t / SECS_PER_DAY;
+  rem = *t % SECS_PER_DAY;
+  rem -= timezone;
+  while (rem < 0)
+    {
+      rem += SECS_PER_DAY;
+      --days;
+    }
+  while (rem >= SECS_PER_DAY)
+    {
+      rem -= SECS_PER_DAY;
+      ++days;
+    }
+  tm->tm_hour = rem / SECS_PER_HOUR;
+  rem %= SECS_PER_HOUR;
+  tm->tm_min = rem / 60;
+  tm->tm_sec = rem % 60;
+  /* January 1, 1970 was a Thursday.  */
+  tm->tm_wday = (4 + days) % 7;
+  if (tm->tm_wday < 0)
+    tm->tm_wday += 7;
+  y = 1970;
+
+#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
+#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
+#define ISLEAP(y)	((y) % 4 == 0 && ((y) % 100 != 0 || (y) % 400 == 0))
+
+  leap = ISLEAP(y);
+  while (days < 0 || days >= (leap ? 366 : 365))
+    {
+      /* Guess a corrected year, assuming 365 days per year.  */
+      time_t yg = y + days / 365 - (days % 365 < 0);
+
+      /* Adjust DAYS and Y to match the guessed year.  */
+      days -= ((yg - y) * 365
+	       + LEAPS_THRU_END_OF (yg - 1)
+	       - LEAPS_THRU_END_OF (y - 1));
+      y = yg;
+    }
+  tm->tm_year = y - 1900;
+  tm->tm_yday = days;
+  ip = __mon_yday[leap];
+  for (y = 11; days < (long int) ip[y]; --y)
+    continue;
+  days -= ip[y];
+  tm->tm_mon = y;
+  tm->tm_mday = days + 1;
+}
+#endif