[apple/libc.git] / gen / syslog.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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 <sys/types.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/uio.h>
#include <sys/un.h>
#include <netdb.h>

#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

#include <crt_externs.h>
 
static int	LogFile = -1;		/* fd for log */
static int	connected;		/* have done connect */
static int	LogStat = 0;		/* status bits, set by openlog() */
static const char *LogTag = NULL;	/* string to tag the entry with */
static int	LogFacility = LOG_USER;	/* default facility code */
static int	LogMask = 0xff;		/* mask of priorities to be logged */

/*
 * syslog, vsyslog --
 *	print message on log file; output is intended for syslogd(8).
 */
void
#ifdef __STDC__
syslog(int pri, const char *fmt, ...)
#else
syslog(pri, fmt, va_alist)
	int pri;
	char *fmt;
	va_dcl
#endif
{
	va_list ap;

#ifdef __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
	vsyslog(pri, fmt, ap);
	va_end(ap);
}

void
vsyslog(pri, fmt, ap)
	int pri;
	register const char *fmt;
	va_list ap;
{
	register int cnt;
	register char ch, *p, *t;
	time_t now;
	int fd, saved_errno;
#define	TBUF_LEN	2048
#define	FMT_LEN		1024
	char *stdp, tbuf[TBUF_LEN], fmt_cpy[FMT_LEN];
	int tbuf_left, fmt_left, prlen;

#define	INTERNALLOG	LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
	/* Check for invalid bits. */
	if (pri & ~(LOG_PRIMASK|LOG_FACMASK)) {
		syslog(INTERNALLOG,
		    "syslog: unknown facility/priority: %x", pri);
		pri &= LOG_PRIMASK|LOG_FACMASK;
	}

	/* Check priority against setlogmask values. */
	if (!(LOG_MASK(LOG_PRI(pri)) & LogMask))
		return;

	saved_errno = errno;

	/* Set default facility if none specified. */
	if ((pri & LOG_FACMASK) == 0)
		pri |= LogFacility;

	/* Build the message. */
	
	/*
 	 * Although it's tempting, we can't ignore the possibility of
	 * overflowing the buffer when assembling the "fixed" portion
	 * of the message.  Strftime's "%h" directive expands to the
	 * locale's abbreviated month name, but if the user has the
	 * ability to construct to his own locale files, it may be
	 * arbitrarily long.
	 */
	(void)time(&now);

	p = tbuf;  
	tbuf_left = TBUF_LEN;
	
#define	DEC()	\
	do {					\
		if (prlen >= tbuf_left)		\
			prlen = tbuf_left - 1;	\
		p += prlen;			\
		tbuf_left -= prlen;		\
	} while (0)

	prlen = snprintf(p, tbuf_left, "<%d>", pri);
	DEC();

	prlen = strftime(p, tbuf_left, "%h %e %T ", localtime(&now));
	DEC();

	if (LogStat & LOG_PERROR)
		stdp = p;
	if (LogTag == NULL)
		LogTag = *(*_NSGetArgv());
	if (LogTag != NULL) {
		prlen = snprintf(p, tbuf_left, "%s", LogTag);
		DEC();
	}
	if (LogStat & LOG_PID) {
		prlen = snprintf(p, tbuf_left, "[%d]", getpid());
		DEC();
	}
	if (LogTag != NULL) {
		if (tbuf_left > 1) {
			*p++ = ':';
			tbuf_left--;
		}
		if (tbuf_left > 1) {
			*p++ = ' ';
			tbuf_left--;
		}
	}

	/* 
	 * We wouldn't need this mess if printf handled %m, or if 
	 * strerror() had been invented before syslog().
	 */
	for (t = fmt_cpy, fmt_left = FMT_LEN; (ch = *fmt); ++fmt) {
		if (ch == '%' && fmt[1] == 'm') {
			++fmt;
			prlen = snprintf(t, fmt_left, "%s",
			    strerror(saved_errno));
			if (prlen >= fmt_left)
				prlen = fmt_left - 1;
			t += prlen;
			fmt_left -= prlen;
		} else {
			if (fmt_left > 1) {
				*t++ = ch;
				fmt_left--;
			}
		}
	}
	*t = '\0';

	prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
	DEC();
	cnt = p - tbuf;

	/* Output to stderr if requested. */
	if (LogStat & LOG_PERROR) {
		struct iovec iov[2];

		iov[0].iov_base = stdp;
		iov[0].iov_len = cnt - (stdp - tbuf);
		iov[1].iov_base = "\n";
		iov[1].iov_len = 1;
		(void)writev(STDERR_FILENO, iov, 2);
	}

	/* Get connected, output the message to the local logger. */
	if (!connected)
		openlog(LogTag, LogStat | LOG_NDELAY, 0);
	if (send(LogFile, tbuf, cnt, 0) >= 0)
		return;

	/*
	 * Output the message to the console; don't worry about blocking,
	 * if console blocks everything will.  Make sure the error reported
	 * is the one from the syslogd failure.
	 */
	if (LogStat & LOG_CONS &&
	    (fd = open(_PATH_CONSOLE, O_WRONLY, 0)) >= 0) {
		struct iovec iov[2];
		
		p = strchr(tbuf, '>') + 1;
		iov[0].iov_base = p;
		iov[0].iov_len = cnt - (p - tbuf);
		iov[1].iov_base = "\r\n";
		iov[1].iov_len = 2;
		(void)writev(fd, iov, 2);
		(void)close(fd);
	}
}

static struct sockaddr_un SyslogAddr;	/* AF_UNIX address of local logger */

void
openlog(ident, logstat, logfac)
	const char *ident;
	int logstat, logfac;
{
	if (ident != NULL)
		LogTag = ident;
	LogStat = logstat;
	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
		LogFacility = logfac;

	if (LogFile == -1) {
		SyslogAddr.sun_family = AF_UNIX;
		(void)strncpy(SyslogAddr.sun_path, _PATH_LOG,
		    sizeof(SyslogAddr.sun_path));
		if (LogStat & LOG_NDELAY) {
			if ((LogFile = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1)
				return;
			(void)fcntl(LogFile, F_SETFD, 1);
		}
	}
	if (LogFile != -1 && !connected)
		if (connect(LogFile, (struct sockaddr *)&SyslogAddr, sizeof(SyslogAddr)) == -1) {
			(void)close(LogFile);
			LogFile = -1;
		} else
			connected = 1;
}

void
closelog()
{
	(void)close(LogFile);
	LogFile = -1;
	connected = 0;
}

/* setlogmask -- set the log mask level */
int
setlogmask(pmask)
	int pmask;
{
	int omask;

	omask = LogMask;
	if (pmask != 0)
		LogMask = pmask;
	return (omask);
}
Commit	Line	Data
e9ce8d39 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
59e0d9fe A	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
59e0d9fe A	7	*
734aad71 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
e9ce8d39 A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
e9ce8d39 A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25	/*
	26	* Copyright (c) 1993
	27	* The Regents of the University of California. All rights reserved.
	28	*
	29	* Redistribution and use in source and binary forms, with or without
	30	* modification, are permitted provided that the following conditions
	31	* are met:
	32	* 1. Redistributions of source code must retain the above copyright
	33	* notice, this list of conditions and the following disclaimer.
	34	* 2. Redistributions in binary form must reproduce the above copyright
	35	* notice, this list of conditions and the following disclaimer in the
	36	* documentation and/or other materials provided with the distribution.
	37	* 3. All advertising materials mentioning features or use of this software
	38	* must display the following acknowledgement:
	39	* This product includes software developed by the University of
	40	* California, Berkeley and its contributors.
	41	* 4. Neither the name of the University nor the names of its contributors
	42	* may be used to endorse or promote products derived from this software
	43	* without specific prior written permission.
	44	*
	45	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	46	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	47	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	48	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	49	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	50	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	51	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	52	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	53	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	54	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	55	* SUCH DAMAGE.
	56	*/
	57
	58	#include <sys/types.h>
	59	#include <sys/socket.h>
	60	#include <sys/syslog.h>
	61	#include <sys/uio.h>
	62	#include <sys/un.h>
	63	#include <netdb.h>
	64
	65	#include <errno.h>
	66	#include <fcntl.h>
	67	#include <paths.h>
	68	#include <stdio.h>
	69	#include <string.h>
	70	#include <time.h>
	71	#include <unistd.h>
	72
	73	#ifdef __STDC__
	74	#include <stdarg.h>
	75	#else
	76	#include <varargs.h>
	77	#endif
	78
	79	#include <crt_externs.h>
	80
	81	static int LogFile = -1; /* fd for log */
	82	static int connected; /* have done connect */
	83	static int LogStat = 0; /* status bits, set by openlog() */
	84	static const char LogTag = NULL; / string to tag the entry with */
	85	static int LogFacility = LOG_USER; /* default facility code */
86	static int LogMask = 0xff; /* mask of priorities to be logged */
87
88	/*
89	* syslog, vsyslog --
90	* print message on log file; output is intended for syslogd(8).
91	*/
92	void
93	#ifdef __STDC__
94	syslog(int pri, const char *fmt, ...)
95	#else
96	syslog(pri, fmt, va_alist)
97	int pri;
98	char *fmt;
99	va_dcl
100	#endif
101	{
102	va_list ap;
103
104	#ifdef __STDC__
105	va_start(ap, fmt);
106	#else
107	va_start(ap);
108	#endif
109	vsyslog(pri, fmt, ap);
110	va_end(ap);
111	}
112
113	void
114	vsyslog(pri, fmt, ap)
115	int pri;
116	register const char *fmt;
117	va_list ap;
118	{
119	register int cnt;
120	register char ch, p, t;
121	time_t now;
122	int fd, saved_errno;
123	#define TBUF_LEN 2048
124	#define FMT_LEN 1024
125	char *stdp, tbuf[TBUF_LEN], fmt_cpy[FMT_LEN];
126	int tbuf_left, fmt_left, prlen;
127
128	#define INTERNALLOG LOG_ERR\|LOG_CONS\|LOG_PERROR\|LOG_PID
129	/* Check for invalid bits. */
130	if (pri & ~(LOG_PRIMASK\|LOG_FACMASK)) {
131	syslog(INTERNALLOG,
132	"syslog: unknown facility/priority: %x", pri);
133	pri &= LOG_PRIMASK\|LOG_FACMASK;
134	}
135
136	/* Check priority against setlogmask values. */
137	if (!(LOG_MASK(LOG_PRI(pri)) & LogMask))
138	return;
139
140	saved_errno = errno;
141
142	/* Set default facility if none specified. */
143	if ((pri & LOG_FACMASK) == 0)
144	pri \|= LogFacility;
145
146	/* Build the message. */
147
148	/*
149	* Although it's tempting, we can't ignore the possibility of
150	* overflowing the buffer when assembling the "fixed" portion
151	* of the message. Strftime's "%h" directive expands to the
152	* locale's abbreviated month name, but if the user has the
153	* ability to construct to his own locale files, it may be
154	* arbitrarily long.
155	*/
156	(void)time(&now);
157
158	p = tbuf;
159	tbuf_left = TBUF_LEN;
160
161	#define DEC() \
162	do { \
163	if (prlen >= tbuf_left) \
164	prlen = tbuf_left - 1; \
165	p += prlen; \
166	tbuf_left -= prlen; \
167	} while (0)
168
169	prlen = snprintf(p, tbuf_left, "<%d>", pri);
170	DEC();
171
172	prlen = strftime(p, tbuf_left, "%h %e %T ", localtime(&now));
173	DEC();
174
175	if (LogStat & LOG_PERROR)
176	stdp = p;
177	if (LogTag == NULL)
178	LogTag = (_NSGetArgv());
179	if (LogTag != NULL) {
180	prlen = snprintf(p, tbuf_left, "%s", LogTag);
181	DEC();
182	}
183	if (LogStat & LOG_PID) {
184	prlen = snprintf(p, tbuf_left, "[%d]", getpid());
185	DEC();
186	}
187	if (LogTag != NULL) {
188	if (tbuf_left > 1) {
189	*p++ = ':';
190	tbuf_left--;
191	}
192	if (tbuf_left > 1) {
193	*p++ = ' ';
194	tbuf_left--;
195	}
196	}
197
198	/*
199	* We wouldn't need this mess if printf handled %m, or if
200	* strerror() had been invented before syslog().
201	*/
202	for (t = fmt_cpy, fmt_left = FMT_LEN; (ch = *fmt); ++fmt) {
203	if (ch == '%' && fmt[1] == 'm') {
204	++fmt;
205	prlen = snprintf(t, fmt_left, "%s",
206	strerror(saved_errno));
207	if (prlen >= fmt_left)
208	prlen = fmt_left - 1;
209	t += prlen;
210	fmt_left -= prlen;
211	} else {
212	if (fmt_left > 1) {
213	*t++ = ch;
214	fmt_left--;
215	}
216	}
217	}
218	*t = '\0';
219
220	prlen = vsnprintf(p, tbuf_left, fmt_cpy, ap);
221	DEC();
222	cnt = p - tbuf;
223
224	/* Output to stderr if requested. */
225	if (LogStat & LOG_PERROR) {
226	struct iovec iov[2];
227
228	iov[0].iov_base = stdp;
229	iov[0].iov_len = cnt - (stdp - tbuf);
230	iov[1].iov_base = "\n";
231	iov[1].iov_len = 1;
232	(void)writev(STDERR_FILENO, iov, 2);
233	}
234
235	/* Get connected, output the message to the local logger. */
236	if (!connected)
237	openlog(LogTag, LogStat \| LOG_NDELAY, 0);
238	if (send(LogFile, tbuf, cnt, 0) >= 0)
239	return;
240
241	/*
242	* Output the message to the console; don't worry about blocking,
243	* if console blocks everything will. Make sure the error reported
244	* is the one from the syslogd failure.
245	*/
246	if (LogStat & LOG_CONS &&
247	(fd = open(_PATH_CONSOLE, O_WRONLY, 0)) >= 0) {
248	struct iovec iov[2];
249
250	p = strchr(tbuf, '>') + 1;
251	iov[0].iov_base = p;
252	iov[0].iov_len = cnt - (p - tbuf);
253	iov[1].iov_base = "\r\n";
254	iov[1].iov_len = 2;
255	(void)writev(fd, iov, 2);
256	(void)close(fd);
257	}
258	}
259
260	static struct sockaddr_un SyslogAddr; /* AF_UNIX address of local logger */
261
262	void
263	openlog(ident, logstat, logfac)
264	const char *ident;
265	int logstat, logfac;
266	{
267	if (ident != NULL)
268	LogTag = ident;
269	LogStat = logstat;
270	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
271	LogFacility = logfac;
272
273	if (LogFile == -1) {
274	SyslogAddr.sun_family = AF_UNIX;
275	(void)strncpy(SyslogAddr.sun_path, _PATH_LOG,
276	sizeof(SyslogAddr.sun_path));
277	if (LogStat & LOG_NDELAY) {
278	if ((LogFile = socket(AF_UNIX, SOCK_DGRAM, 0)) == -1)
279	return;
280	(void)fcntl(LogFile, F_SETFD, 1);
281	}
282	}
283	if (LogFile != -1 && !connected)
9385eb3d	284	if (connect(LogFile, (struct sockaddr *)&SyslogAddr, sizeof(SyslogAddr)) == -1) {
e9ce8d39 A	285	(void)close(LogFile);
	286	LogFile = -1;
	287	} else
	288	connected = 1;
	289	}
	290
	291	void
	292	closelog()
	293	{
	294	(void)close(LogFile);
	295	LogFile = -1;
	296	connected = 0;
	297	}
	298
	299	/* setlogmask -- set the log mask level */
	300	int
	301	setlogmask(pmask)
	302	int pmask;
	303	{
	304	int omask;
	305
	306	omask = LogMask;
	307	if (pmask != 0)
	308	LogMask = pmask;
	309	return (omask);
	310	}