253 lines
5.9 KiB
C
253 lines
5.9 KiB
C
/* $NetBSD: syslog.c,v 1.58 2017/01/12 18:16:52 christos 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 <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)syslog.c 8.5 (Berkeley) 4/29/95";
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#else
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__RCSID("$NetBSD: syslog.c,v 1.58 2017/01/12 18:16:52 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/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 <errno.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "syslog_private.h"
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#include "reentrant.h"
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#include "extern.h"
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#ifdef __weak_alias
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__weak_alias(syslog,_syslog)
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__weak_alias(vsyslog,_vsyslog)
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__weak_alias(syslogp,_syslogp)
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__weak_alias(vsyslogp,_vsyslogp)
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__weak_alias(closelog,_closelog)
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__weak_alias(openlog,_openlog)
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__weak_alias(setlogmask,_setlogmask)
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#endif
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static struct syslog_data _syslog_data = SYSLOG_DATA_INIT;
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#ifdef _REENTRANT
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static mutex_t syslog_mutex = MUTEX_INITIALIZER;
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#endif
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static size_t
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timefun(char *p, size_t tbuf_left)
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{
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struct timeval tv;
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time_t now;
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struct tm tmnow;
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size_t prlen;
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char *op = p;
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if (gettimeofday(&tv, NULL) == -1)
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return snprintf_ss(p, tbuf_left, "-");
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/* strftime() implies tzset(), localtime_r() doesn't. */
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tzset();
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now = (time_t) tv.tv_sec;
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localtime_r(&now, &tmnow);
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prlen = strftime(p, tbuf_left, "%FT%T", &tmnow);
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DEC();
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prlen = snprintf(p, tbuf_left, ".%06ld", (long)tv.tv_usec);
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DEC();
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prlen = strftime(p, tbuf_left-1, "%z", &tmnow);
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/* strftime gives eg. "+0200", but we need "+02:00" */
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if (prlen == 5) {
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p[prlen+1] = p[prlen];
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p[prlen] = p[prlen-1];
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p[prlen-1] = p[prlen-2];
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p[prlen-2] = ':';
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prlen += 1;
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}
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DEC();
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return (size_t)(p - op);
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}
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static int
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lock(const struct syslog_data *data)
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{
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int rv = data == &_syslog_data;
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if (rv)
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mutex_lock(&syslog_mutex);
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return rv;
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}
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static int
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unlock(const struct syslog_data *data)
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{
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int rv = data == &_syslog_data;
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if (rv)
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mutex_unlock(&syslog_mutex);
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return rv;
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}
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static struct syslog_fun _syslog_fun = {
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timefun,
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strerror_r,
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vsnprintf,
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lock,
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unlock,
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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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openlog_r(ident, logstat, logfac, &_syslog_data);
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}
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void
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closelog(void)
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{
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closelog_r(&_syslog_data);
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}
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/* setlogmask -- set the log mask level */
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int
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setlogmask(int pmask)
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{
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return setlogmask_r(pmask, &_syslog_data);
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}
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void
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openlog_r(const char *ident, int logstat, int logfac, struct syslog_data *data)
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{
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lock(data);
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_openlog_unlocked_r(ident, logstat, logfac, data);
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unlock(data);
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}
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void
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closelog_r(struct syslog_data *data)
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{
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lock(data);
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_closelog_unlocked_r(data);
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data->log_tag = NULL;
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unlock(data);
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}
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/*
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* syslog, vsyslog --
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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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va_start(ap, fmt);
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_vxsyslogp_r(pri, &_syslog_fun, &_syslog_data, NULL, NULL, fmt, ap);
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va_end(ap);
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}
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void
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vsyslog(int pri, const char *fmt, va_list ap)
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{
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_vxsyslogp_r(pri, &_syslog_fun, &_syslog_data, NULL, NULL, fmt, ap);
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}
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/*
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* syslogp, vsyslogp --
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* like syslog but take additional arguments for MSGID and SD
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*/
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void
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syslogp(int pri, const char *msgid, const char *sdfmt, const char *msgfmt, ...)
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{
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va_list ap;
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va_start(ap, msgfmt);
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_vxsyslogp_r(pri, &_syslog_fun, &_syslog_data,
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msgid, sdfmt, msgfmt, ap);
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va_end(ap);
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}
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void
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vsyslogp(int pri, const char *msgid, const char *sdfmt, const char *msgfmt,
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va_list ap)
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{
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_vxsyslogp_r(pri, &_syslog_fun, &_syslog_data,
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msgid, sdfmt, msgfmt, ap);
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}
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void
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vsyslogp_r(int pri, struct syslog_data *data, const char *msgid,
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const char *sdfmt, const char *msgfmt, va_list ap)
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{
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_vxsyslogp_r(pri, &_syslog_fun, data, msgid, sdfmt, msgfmt, ap);
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}
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void
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syslog_r(int pri, struct syslog_data *data, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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_vxsyslogp_r(pri, &_syslog_fun, data, NULL, NULL, fmt, ap);
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va_end(ap);
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}
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void
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syslogp_r(int pri, struct syslog_data *data, const char *msgid,
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const char *sdfmt, const char *msgfmt, ...)
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{
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va_list ap;
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va_start(ap, msgfmt);
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_vxsyslogp_r(pri, &_syslog_fun, data, msgid, sdfmt, msgfmt, ap);
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va_end(ap);
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}
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void
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vsyslog_r(int pri, struct syslog_data *data, const char *fmt, va_list ap)
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{
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_vxsyslogp_r(pri, &_syslog_fun, data, NULL, NULL, fmt, ap);
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}
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