[dragonfly.git] / sbin / dhclient / errwarn.c

/*	$OpenBSD: errwarn.c,v 1.15 2007/03/02 11:31:17 henning Exp $	*/
/*	$DragonFly: src/sbin/dhclient/errwarn.c,v 1.1 2008/08/30 16:07:58 hasso Exp $	*/

/* Errors and warnings... */

/*
 * Copyright (c) 1996 The Internet Software Consortium.
 * All Rights Reserved.
 * Copyright (c) 1995 RadioMail Corporation.  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 RadioMail Corporation, the Internet Software
 *    Consortium 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 RADIOMAIL CORPORATION, THE INTERNET
 * SOFTWARE CONSORTIUM 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 RADIOMAIL CORPORATION 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.
 *
 * This software was written for RadioMail Corporation by Ted Lemon
 * under a contract with Vixie Enterprises.   Further modifications have
 * been made for the Internet Software Consortium under a contract
 * with Vixie Laboratories.
 */

#include <sys/types.h>
#include <sys/uio.h>

#include <errno.h>
#include <unistd.h>

#include "dhcpd.h"

static void do_percentm(char *obuf, size_t size, char *ibuf);

static char mbuf[1024];
static char fbuf[1024];

int warnings_occurred;

/*
 * Log an error message, then exit.
 */
void
error(char *fmt, ...)
{
	va_list list;

	do_percentm(fbuf, sizeof(fbuf), fmt);

	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
	va_end(list);

#ifndef DEBUG
	syslog(LOG_ERR, "%s", mbuf);
#endif

	/* Also log it to stderr? */
	if (log_perror) {
		write(STDERR_FILENO, mbuf, strlen(mbuf));
		write(STDERR_FILENO, "\n", 1);
	}

	syslog(LOG_CRIT, "exiting.");
	if (log_perror) {
		fprintf(stderr, "exiting.\n");
		fflush(stderr);
	}
	exit(1);
}

/*
 * Log a warning message...
 */
int
warning(char *fmt, ...)
{
	va_list list;

	do_percentm(fbuf, sizeof(fbuf), fmt);

	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
	va_end(list);

#ifndef DEBUG
	syslog(LOG_ERR, "%s", mbuf);
#endif

	if (log_perror) {
		write(STDERR_FILENO, mbuf, strlen(mbuf));
		write(STDERR_FILENO, "\n", 1);
	}

	return (0);
}

/*
 * Log a note...
 */
int
note(char *fmt, ...)
{
	va_list list;

	do_percentm(fbuf, sizeof(fbuf), fmt);

	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
	va_end(list);

#ifndef DEBUG
	syslog(LOG_INFO, "%s", mbuf);
#endif

	if (log_perror) {
		write(STDERR_FILENO, mbuf, strlen(mbuf));
		write(STDERR_FILENO, "\n", 1);
	}

	return (0);
}

#ifdef DEBUG
/*
 * Log a debug message...
 */
int
debug(char *fmt, ...)
{
	va_list list;

	do_percentm(fbuf, sizeof(fbuf), fmt);

	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
	va_end(list);

	syslog(LOG_DEBUG, "%s", mbuf);

	if (log_perror) {
		write(STDERR_FILENO, mbuf, strlen(mbuf));
		write(STDERR_FILENO, "\n", 1);
	}

	return (0);
}
#endif
/*
 * Find %m in the input string and substitute an error message string.
 */
static void
do_percentm(char *obuf, size_t size, char *ibuf)
{
	char ch;
	char *s = ibuf;
	char *t = obuf;
	int prlen;
	ssize_t fmt_left;
	int saved_errno = errno;

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

int
parse_warn(char *fmt, ...)
{
	va_list list;
	static char spaces[] =
	    "                                        "
	    "                                        "; /* 80 spaces */
	struct iovec iov[6];
	size_t iovcnt;

	do_percentm(mbuf, sizeof(mbuf), fmt);
	snprintf(fbuf, sizeof(fbuf), "%s line %d: %s", tlname, lexline, mbuf);
	va_start(list, fmt);
	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
	va_end(list);

#ifndef DEBUG
	syslog(LOG_ERR, "%s", mbuf);
	syslog(LOG_ERR, "%s", token_line);
	if (lexchar < 81)
		syslog(LOG_ERR, "%*c", lexchar, '^');
#endif

	if (log_perror) {
		iov[0].iov_base = mbuf;
		iov[0].iov_len = strlen(mbuf);
		iov[1].iov_base = "\n";
		iov[1].iov_len = 1;
		iov[2].iov_base = token_line;
		iov[2].iov_len = strlen(token_line);
		iov[3].iov_base = "\n";
		iov[3].iov_len = 1;
		iovcnt = 4;
		if (lexchar < 81) {
			iov[4].iov_base = spaces;
			iov[4].iov_len = lexchar - 1;
			iov[5].iov_base = "^\n";
			iov[5].iov_len = 2;
			iovcnt += 2;
		}
		writev(STDERR_FILENO, iov, iovcnt);
	}
	warnings_occurred = 1;
	return (0);
}
Commit	Line	Data
846204b6 HT	1	/* $OpenBSD: errwarn.c,v 1.15 2007/03/02 11:31:17 henning Exp $ */
	2	/* $DragonFly: src/sbin/dhclient/errwarn.c,v 1.1 2008/08/30 16:07:58 hasso Exp $ */
	3
	4	/* Errors and warnings... */
	5
	6	/*
	7	* Copyright (c) 1996 The Internet Software Consortium.
	8	* All Rights Reserved.
	9	* Copyright (c) 1995 RadioMail Corporation. All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	*
	15	* 1. Redistributions of source code must retain the above copyright
	16	* notice, this list of conditions and the following disclaimer.
	17	* 2. Redistributions in binary form must reproduce the above copyright
	18	* notice, this list of conditions and the following disclaimer in the
	19	* documentation and/or other materials provided with the distribution.
	20	* 3. Neither the name of RadioMail Corporation, the Internet Software
	21	* Consortium nor the names of its contributors may be used to endorse
	22	* or promote products derived from this software without specific
	23	* prior written permission.
	24	*
	25	* THIS SOFTWARE IS PROVIDED BY RADIOMAIL CORPORATION, THE INTERNET
	26	* SOFTWARE CONSORTIUM AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
	27	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	28	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL RADIOMAIL CORPORATION OR CONTRIBUTORS
	30	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	31	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	32	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	33	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	34	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	35	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	36	* OF THE POSSIBILITY OF SUCH DAMAGE.
	37	*
	38	* This software was written for RadioMail Corporation by Ted Lemon
	39	* under a contract with Vixie Enterprises. Further modifications have
	40	* been made for the Internet Software Consortium under a contract
	41	* with Vixie Laboratories.
	42	*/
	43
	44	#include <sys/types.h>
	45	#include <sys/uio.h>
	46
	47	#include <errno.h>
	48	#include <unistd.h>
	49
	50	#include "dhcpd.h"
	51
	52	static void do_percentm(char obuf, size_t size, char ibuf);
	53
	54	static char mbuf[1024];
	55	static char fbuf[1024];
	56
	57	int warnings_occurred;
	58
	59	/*
	60	* Log an error message, then exit.
	61	*/
	62	void
	63	error(char *fmt, ...)
	64	{
65	va_list list;
66
67	do_percentm(fbuf, sizeof(fbuf), fmt);
68
69	va_start(list, fmt);
70	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
71	va_end(list);
72
73	#ifndef DEBUG
74	syslog(LOG_ERR, "%s", mbuf);
75	#endif
76
77	/* Also log it to stderr? */
78	if (log_perror) {
79	write(STDERR_FILENO, mbuf, strlen(mbuf));
80	write(STDERR_FILENO, "\n", 1);
81	}
82
83	syslog(LOG_CRIT, "exiting.");
84	if (log_perror) {
85	fprintf(stderr, "exiting.\n");
86	fflush(stderr);
87	}
88	exit(1);
89	}
90
91	/*
92	* Log a warning message...
93	*/
94	int
95	warning(char *fmt, ...)
96	{
97	va_list list;
98
99	do_percentm(fbuf, sizeof(fbuf), fmt);
100
101	va_start(list, fmt);
102	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
103	va_end(list);
104
105	#ifndef DEBUG
106	syslog(LOG_ERR, "%s", mbuf);
107	#endif
108
109	if (log_perror) {
110	write(STDERR_FILENO, mbuf, strlen(mbuf));
111	write(STDERR_FILENO, "\n", 1);
112	}
113
114	return (0);
115	}
116
117	/*
118	* Log a note...
119	*/
120	int
121	note(char *fmt, ...)
122	{
123	va_list list;
124
125	do_percentm(fbuf, sizeof(fbuf), fmt);
126
127	va_start(list, fmt);
128	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
129	va_end(list);
130
131	#ifndef DEBUG
132	syslog(LOG_INFO, "%s", mbuf);
133	#endif
134
135	if (log_perror) {
136	write(STDERR_FILENO, mbuf, strlen(mbuf));
137	write(STDERR_FILENO, "\n", 1);
138	}
139
140	return (0);
141	}
142
4cada237	143	#ifdef DEBUG
846204b6 HT	144	/*
	145	* Log a debug message...
	146	*/
	147	int
	148	debug(char *fmt, ...)
	149	{
	150	va_list list;
	151
	152	do_percentm(fbuf, sizeof(fbuf), fmt);
	153
	154	va_start(list, fmt);
	155	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
	156	va_end(list);
	157
846204b6	158	syslog(LOG_DEBUG, "%s", mbuf);
846204b6 HT	159
	160	if (log_perror) {
	161	write(STDERR_FILENO, mbuf, strlen(mbuf));
	162	write(STDERR_FILENO, "\n", 1);
	163	}
	164
	165	return (0);
	166	}
4cada237	167	#endif
846204b6 HT	168	/*
	169	* Find %m in the input string and substitute an error message string.
	170	*/
	171	static void
	172	do_percentm(char obuf, size_t size, char ibuf)
	173	{
	174	char ch;
	175	char *s = ibuf;
	176	char *t = obuf;
	177	int prlen;
	178	ssize_t fmt_left;
	179	int saved_errno = errno;
	180
	181	/*
	182	* We wouldn't need this mess if printf handled %m, or if
	183	* strerror() had been invented before syslog().
	184	*/
	185	for (fmt_left = size; (ch = *s); ++s) {
	186	if (ch == '%' && s[1] == 'm') {
	187	++s;
	188	prlen = snprintf(t, fmt_left, "%s",
	189	strerror(saved_errno));
	190	if (prlen == -1)
	191	prlen = 0;
	192	else if (prlen >= fmt_left)
	193	prlen = fmt_left - 1;
	194	t += prlen;
	195	fmt_left -= prlen;
	196	} else {
	197	if (fmt_left > 1) {
	198	*t++ = ch;
	199	fmt_left--;
	200	}
	201	}
	202	}
	203	*t = '\0';
	204	}
	205
	206	int
	207	parse_warn(char *fmt, ...)
	208	{
	209	va_list list;
	210	static char spaces[] =
	211	" "
	212	" "; /* 80 spaces */
	213	struct iovec iov[6];
	214	size_t iovcnt;
	215
	216	do_percentm(mbuf, sizeof(mbuf), fmt);
	217	snprintf(fbuf, sizeof(fbuf), "%s line %d: %s", tlname, lexline, mbuf);
	218	va_start(list, fmt);
	219	vsnprintf(mbuf, sizeof(mbuf), fbuf, list);
	220	va_end(list);
	221
	222	#ifndef DEBUG
	223	syslog(LOG_ERR, "%s", mbuf);
	224	syslog(LOG_ERR, "%s", token_line);
	225	if (lexchar < 81)
	226	syslog(LOG_ERR, "%*c", lexchar, '^');
	227	#endif
	228
	229	if (log_perror) {
	230	iov[0].iov_base = mbuf;
	231	iov[0].iov_len = strlen(mbuf);
232	iov[1].iov_base = "\n";
233	iov[1].iov_len = 1;
234	iov[2].iov_base = token_line;
235	iov[2].iov_len = strlen(token_line);
236	iov[3].iov_base = "\n";
237	iov[3].iov_len = 1;
238	iovcnt = 4;
239	if (lexchar < 81) {
240	iov[4].iov_base = spaces;
241	iov[4].iov_len = lexchar - 1;
242	iov[5].iov_base = "^\n";
243	iov[5].iov_len = 2;
244	iovcnt += 2;
245	}
246	writev(STDERR_FILENO, iov, iovcnt);
247	}
248	warnings_occurred = 1;
249	return (0);
250	}