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Experimental syslog() replacement
2-3x faster than libc. Add it to the Makefile yourself if you want to test it.
This commit is contained in:
Howard Chu
parent
1ab08d2f8e
commit
b7a291a488
@ -805,7 +805,7 @@ syncprov_free_syncop( syncops *so, int unlink )
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return 0;
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}
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ldap_pvt_thread_mutex_unlock( &so->s_mutex );
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if ( unlink ) {
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if ( unlink && so->s_si ) {
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syncops **sop;
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ldap_pvt_thread_mutex_lock( &so->s_si->si_ops_mutex );
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for ( sop = &so->s_si->si_ops; *sop; sop = &(*sop)->s_next ) {
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@ -3230,6 +3230,7 @@ syncprov_db_close(
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rs.sr_err = LDAP_UNAVAILABLE;
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send_ldap_result( so->s_op, &rs );
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sonext=so->s_next;
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so->s_si = NULL;
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syncprov_drop_psearch( so, 0);
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}
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si->si_ops=NULL;
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329
servers/slapd/syslog.c
Normal file
329
servers/slapd/syslog.c
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@ -0,0 +1,329 @@
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/* $OpenBSD: syslog.c,v 1.29 2007/11/09 18:40:19 millert Exp $ */
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/*
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* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "portable.h"
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#include <sys/types.h>
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#include <ac/socket.h>
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#include <ac/syslog.h>
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#include <sys/uio.h>
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#include <sys/un.h>
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#include <netdb.h>
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#include <ac/errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdio.h>
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#include <ac/string.h>
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#include <ac/time.h>
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#include <ac/unistd.h>
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#include <ac/stdarg.h>
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#include "slap.h"
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static int LogType = SOCK_DGRAM; /* type of socket connection */
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static int LogFile = -1; /* fd for log */
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static int connected; /* have done connect */
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static int LogStat; /* status bits, set by openlog() */
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static const char *LogTag; /* string to tag the entry with */
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static int LogFacility = LOG_USER; /* default facility code */
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static int LogMask = 0xff; /* mask of priorities to be logged */
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static void disconnectlog(void);
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static void connectlog(void);
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static void my_localtime(const time_t *t, struct tm *tm);
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/*
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* syslog
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* print message on log file; output is intended for syslogd(8).
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*/
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void
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syslog(int pri, const char *fmt, ...)
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{
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va_list ap;
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char *p, *t;
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#define TBUF_LEN 2048
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#define FMT_LEN 1024
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char *stdp, tbuf[TBUF_LEN], fmt_cpy[FMT_LEN];
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time_t now;
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int cnt;
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int fd, saved_errno, error;
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char ch;
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int tbuf_left, fmt_left, prlen;
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struct tm tm;
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va_start(ap, fmt);
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/* Check for invalid bits. */
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if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
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if (LogTest(LOG_ERR))
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lutil_debug(slap_debug, LOG_ERR,
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"syslog: unknown facility/priority: %x", pri);
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pri &= LOG_PRIMASK|LOG_FACMASK;
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}
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saved_errno = errno;
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/* Set default facility if none specified. */
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if ((pri & LOG_FACMASK) == 0)
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pri |= LogFacility;
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(void)time(&now);
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p = tbuf;
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tbuf_left = TBUF_LEN;
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#define DEC() \
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do { \
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if (prlen < 0) \
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prlen = 0; \
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if (prlen >= tbuf_left) \
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prlen = tbuf_left - 1; \
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p += prlen; \
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tbuf_left -= prlen; \
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} while (0)
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prlen = snprintf(p, tbuf_left, "<%d>", pri);
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DEC();
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my_localtime(&now, &tm);
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prlen = strftime(p, tbuf_left, "%h %e %T ", &tm);
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DEC();
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if (LogTag != NULL) {
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prlen = snprintf(p, tbuf_left, "%s", LogTag);
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DEC();
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}
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if (LogStat & LOG_PID) {
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prlen = snprintf(p, tbuf_left, "[%ld]", (long)getpid());
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DEC();
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}
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if (LogTag != NULL) {
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if (tbuf_left > 1) {
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*p++ = ':';
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tbuf_left--;
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}
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if (tbuf_left > 1) {
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*p++ = ' ';
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tbuf_left--;
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}
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}
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/* strerror() is not reentrant */
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for (t = fmt_cpy, fmt_left = FMT_LEN; (ch = *fmt); ++fmt) {
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if (ch == '%' && fmt[1] == 'm') {
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++fmt;
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prlen = snprintf(t, fmt_left, "%s",
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strerror(saved_errno));
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if (prlen < 0)
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prlen = 0;
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if (prlen >= fmt_left)
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prlen = fmt_left - 1;
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t += prlen;
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fmt_left -= prlen;
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} else if (ch == '%' && fmt[1] == '%' && fmt_left > 2) {
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*t++ = '%';
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*t++ = '%';
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fmt++;
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fmt_left -= 2;
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} else {
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if (fmt_left > 1) {
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*t++ = ch;
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fmt_left--;
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}
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}
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}
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*t = '\0';
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prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
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DEC();
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cnt = p - tbuf;
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va_end(ap);
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/* Get connected, output the message to the local logger. */
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if (LogFile == -1)
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openlog(LogTag, LogStat, 0);
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connectlog();
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/*
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* If the send() failed, there are two likely scenarios:
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* 1) syslogd was restarted
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* 2) /dev/log is out of socket buffer space
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* We attempt to reconnect to /dev/log to take care of
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* case #1 and keep send()ing data to cover case #2
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* to give syslogd a chance to empty its socket buffer.
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*/
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if ((error = send(LogFile, tbuf, cnt, 0)) < 0) {
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if (errno != ENOBUFS) {
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disconnectlog();
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connectlog();
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}
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do {
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usleep(1);
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if ((error = send(LogFile, tbuf, cnt, 0)) >= 0)
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break;
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} while (errno == ENOBUFS);
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}
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}
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static void
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disconnectlog(void)
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{
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/*
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* If the user closed the FD and opened another in the same slot,
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* that's their problem. They should close it before calling on
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* system services.
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*/
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if (LogFile != -1) {
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close(LogFile);
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LogFile = -1;
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}
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connected = 0; /* retry connect */
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}
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static void
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connectlog(void)
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{
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struct sockaddr_un SyslogAddr; /* AF_UNIX address of local logger */
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if (LogFile == -1) {
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if ((LogFile = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1)
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return;
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(void)fcntl(LogFile, F_SETFD, FD_CLOEXEC);
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}
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if (LogFile != -1 && !connected) {
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memset(&SyslogAddr, '\0', sizeof(SyslogAddr));
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#ifdef _BSD
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SyslogAddr.sun_len = sizeof(SyslogAddr);
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#endif
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SyslogAddr.sun_family = AF_UNIX;
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strncpy(SyslogAddr.sun_path, _PATH_LOG,
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sizeof(SyslogAddr.sun_path));
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if (connect(LogFile, (struct sockaddr *)&SyslogAddr,
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sizeof(SyslogAddr)) == -1) {
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(void)close(LogFile);
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LogFile = -1;
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} else
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connected = 1;
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}
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}
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void
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openlog(const char *ident, int logstat, int logfac)
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{
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if (ident != NULL)
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LogTag = ident;
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LogStat = logstat;
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if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
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LogFacility = logfac;
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if (LogStat & LOG_NDELAY) /* open immediately */
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connectlog();
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}
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void
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closelog()
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{
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(void)close(LogFile);
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LogFile = -1;
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connected = 0;
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LogTag = NULL;
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}
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#define SECS_PER_HOUR (60 * 60)
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#define SECS_PER_DAY (SECS_PER_HOUR * 24)
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/* How many days come before each month (0-12). */
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static const unsigned short int __mon_yday[2][13] =
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{
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/* Normal years. */
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{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
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/* Leap years. */
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{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
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};
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/* Compute the `struct tm' representation of *T,
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and store year, yday, mon, mday, wday, hour, min, sec into *TP */
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static void my_localtime(const time_t *t, struct tm *tm)
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{
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time_t days, rem, y;
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const unsigned short int *ip;
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int leap;
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days = *t / SECS_PER_DAY;
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rem = *t % SECS_PER_DAY;
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rem -= timezone;
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while (rem < 0)
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{
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rem += SECS_PER_DAY;
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--days;
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}
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while (rem >= SECS_PER_DAY)
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{
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rem -= SECS_PER_DAY;
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++days;
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}
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tm->tm_hour = rem / SECS_PER_HOUR;
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rem %= SECS_PER_HOUR;
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tm->tm_min = rem / 60;
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tm->tm_sec = rem % 60;
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/* January 1, 1970 was a Thursday. */
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tm->tm_wday = (4 + days) % 7;
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if (tm->tm_wday < 0)
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tm->tm_wday += 7;
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y = 1970;
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#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
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#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
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#define ISLEAP(y) ((y) % 4 == 0 && ((y) % 100 != 0 || (y) % 400 == 0))
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leap = ISLEAP(y);
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while (days < 0 || days >= (leap ? 366 : 365))
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{
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/* Guess a corrected year, assuming 365 days per year. */
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time_t yg = y + days / 365 - (days % 365 < 0);
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/* Adjust DAYS and Y to match the guessed year. */
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days -= ((yg - y) * 365
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+ LEAPS_THRU_END_OF (yg - 1)
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- LEAPS_THRU_END_OF (y - 1));
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y = yg;
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}
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tm->tm_year = y - 1900;
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tm->tm_yday = days;
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ip = __mon_yday[leap];
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for (y = 11; days < (long int) ip[y]; --y)
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continue;
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days -= ip[y];
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tm->tm_mon = y;
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tm->tm_mday = days + 1;
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}
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