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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/syslogd/log.c	Lines:	27	88	30.7 %
Date:	2017-11-07	Branches:	6	24	25.0 %


/*	$OpenBSD: log.c,v 1.4 2017/04/28 14:52:13 bluhm Exp $	*/

/*
 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
 * Copyright (c) 2017 Alexander Bluhm <bluhm@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>

#include "log.h"
#include "syslogd.h"

static int		 verbose;
static int		 facility;
static const char	*log_procname;
static char		*debug_ebuf;
static size_t		 debug_length;

void
log_init(int n_debug, int fac)
{
	extern char	*__progname;

	verbose = n_debug;
	facility = fac;
	log_procinit(__progname);

	if (debug_ebuf == NULL)
		if ((debug_ebuf = malloc(ERRBUFSIZE)) == NULL)
			err(1, "allocate debug buffer");
	debug_ebuf[0] = '\0';
	debug_length = 0;

	tzset();
}

void
log_procinit(const char *procname)
{
	if (procname != NULL)
		log_procname = procname;
}

void
log_setverbose(int v)
{
	verbose = v;
}

int
log_getverbose(void)
{
	return (verbose);
}

void
logit(int pri, const char *fmt, ...)
{
	va_list	ap;

	va_start(ap, fmt);
	vlog(pri, fmt, ap);
	va_end(ap);
}

void
vlog(int pri, const char *fmt, va_list ap)
{
	int	 saved_errno = errno;

	vlogmsg(facility|pri, log_procname, fmt, ap);

	errno = saved_errno;
}

void
log_warn(const char *emsg, ...)
{
	char	 ebuf[ERRBUFSIZE];
	size_t	 l;
	va_list	 ap;
	int	 saved_errno = errno;

	/* best effort to even work in out of memory situations */
	if (emsg == NULL)
		logit(LOG_ERR, "%s", strerror(saved_errno));
	else {
		va_start(ap, emsg);
		l = vsnprintf(ebuf, sizeof(ebuf), emsg, ap);
		if (l < sizeof(ebuf))
			snprintf(ebuf+l, sizeof(ebuf)-l, ": %s",
			    strerror(saved_errno));
		logit(LOG_ERR, "%s", ebuf);
		va_end(ap);
	}
	errno = saved_errno;
}

void
log_warnx(const char *emsg, ...)
{
	va_list	 ap;

	va_start(ap, emsg);
	vlog(LOG_ERR, emsg, ap);
	va_end(ap);
}

void
log_info(int pri, const char *emsg, ...)
{
	va_list	 ap;

	va_start(ap, emsg);
	vlog(pri, emsg, ap);
	va_end(ap);
}

void
log_debug(const char *emsg, ...)
{
	va_list	 ap;
	int	 saved_errno;

	if (verbose) {
		saved_errno = errno;
		va_start(ap, emsg);
		if (debug_length < ERRBUFSIZE - 1)
			vsnprintf(debug_ebuf + debug_length,
			    ERRBUFSIZE - debug_length, emsg, ap);
		fprintf(stderr, "%s\n", debug_ebuf);
		fflush(stderr);
		va_end(ap);
		errno = saved_errno;
	}
	debug_ebuf[0] = '\0';
	debug_length = 0;
}

void
log_debugadd(const char *emsg, ...)
{
	size_t	 l;
	va_list	 ap;
	int	 saved_errno;

	if (verbose) {
		saved_errno = errno;
		va_start(ap, emsg);
		if (debug_length < ERRBUFSIZE - 1) {
			l = vsnprintf(debug_ebuf + debug_length,
			    ERRBUFSIZE - debug_length, emsg, ap);
			if (l < ERRBUFSIZE - debug_length)
				debug_length += l;
			else
				debug_length = ERRBUFSIZE - 1;
		}
		va_end(ap);
		errno = saved_errno;
	}
}

static void
vfatalc(int error, const char *emsg, va_list ap)
{
	char		 ebuf[ERRBUFSIZE];
	const char	*sep;

	if (emsg != NULL) {
		(void)vsnprintf(ebuf, sizeof(ebuf), emsg, ap);
		sep = ": ";
	} else {
		ebuf[0] = '\0';
		sep = "";
	}
	if (error)
		logit(LOG_CRIT, "fatal in %s: %s%s%s",
		    log_procname, ebuf, sep, strerror(error));
	else
		logit(LOG_CRIT, "fatal in %s%s%s", log_procname, sep, ebuf);
}

void
fatal(const char *emsg, ...)
{
	va_list	ap;

	va_start(ap, emsg);
	vfatalc(errno, emsg, ap);
	va_end(ap);
	die(0);
}

void
fatalx(const char *emsg, ...)
{
	va_list	ap;

	va_start(ap, emsg);
	vfatalc(0, emsg, ap);
	va_end(ap);
	die(0);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: log.c,v 1.4 2017/04/28 14:52:13 bluhm Exp $ */
2
3			/*
4			* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
5			* Copyright (c) 2017 Alexander Bluhm <bluhm@openbsd.org>
6			*
7			* Permission to use, copy, modify, and distribute this software for any
8			* purpose with or without fee is hereby granted, provided that the above
9			* copyright notice and this permission notice appear in all copies.
10			*
11			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18			*/
19
20			#include <err.h>
21			#include <errno.h>
22			#include <stdio.h>
23			#include <stdlib.h>
24			#include <string.h>
25			#include <syslog.h>
26			#include <time.h>
27
28			#include "log.h"
29			#include "syslogd.h"
30
31			static int verbose;
32			static int facility;
33			static const char *log_procname;
34			static char *debug_ebuf;
35			static size_t debug_length;
36
37			void
38			log_init(int n_debug, int fac)
39			{
40			extern char *__progname;
41
42		1748	verbose = n_debug;
43		874	facility = fac;
44		874	log_procinit(__progname);
45
46	✓✗	874	if (debug_ebuf == NULL)
47	✗✓	874	if ((debug_ebuf = malloc(ERRBUFSIZE)) == NULL)
48			err(1, "allocate debug buffer");
49		874	debug_ebuf[0] = '\0';
50		874	debug_length = 0;
51
52		874	tzset();
53		874	}
54
55			void
56			log_procinit(const char *procname)
57			{
58	✓✗	3496	if (procname != NULL)
59		1748	log_procname = procname;
60		1748	}
61
62			void
63			log_setverbose(int v)
64			{
65			verbose = v;
66			}
67
68			int
69			log_getverbose(void)
70			{
71			return (verbose);
72			}
73
74			void
75			logit(int pri, const char *fmt, ...)
76			{
77			va_list ap;
78
79			va_start(ap, fmt);
80			vlog(pri, fmt, ap);
81			va_end(ap);
82			}
83
84			void
85			vlog(int pri, const char *fmt, va_list ap)
86			{
87			int saved_errno = errno;
88
89			vlogmsg(facility\|pri, log_procname, fmt, ap);
90
91			errno = saved_errno;
92			}
93
94			void
95			log_warn(const char *emsg, ...)
96			{
97			char ebuf[ERRBUFSIZE];
98			size_t l;
99			va_list ap;
100			int saved_errno = errno;
101
102			/* best effort to even work in out of memory situations */
103			if (emsg == NULL)
104			logit(LOG_ERR, "%s", strerror(saved_errno));
105			else {
106			va_start(ap, emsg);
107			l = vsnprintf(ebuf, sizeof(ebuf), emsg, ap);
108			if (l < sizeof(ebuf))
109			snprintf(ebuf+l, sizeof(ebuf)-l, ": %s",
110			strerror(saved_errno));
111			logit(LOG_ERR, "%s", ebuf);
112			va_end(ap);
113			}
114			errno = saved_errno;
115			}
116
117			void
118			log_warnx(const char *emsg, ...)
119			{
120			va_list ap;
121
122			va_start(ap, emsg);
123			vlog(LOG_ERR, emsg, ap);
124			va_end(ap);
125			}
126
127			void
128			log_info(int pri, const char *emsg, ...)
129			{
130			va_list ap;
131
132			va_start(ap, emsg);
133			vlog(pri, emsg, ap);
134			va_end(ap);
135			}
136
137			void
138			log_debug(const char *emsg, ...)
139			{
140		96174	va_list ap;
141			int saved_errno;
142
143	✓✓	48087	if (verbose) {
144		47969	saved_errno = errno;
145		47969	va_start(ap, emsg);
146	✓✗	47969	if (debug_length < ERRBUFSIZE - 1)
147		95938	vsnprintf(debug_ebuf + debug_length,
148		47969	ERRBUFSIZE - debug_length, emsg, ap);
149		47969	fprintf(stderr, "%s\n", debug_ebuf);
150		47969	fflush(stderr);
151		47969	va_end(ap);
152		47969	errno = saved_errno;
153		47969	}
154		48087	debug_ebuf[0] = '\0';
155		48087	debug_length = 0;
156		48087	}
157
158			void
159			log_debugadd(const char *emsg, ...)
160			{
161			size_t l;
162			va_list ap;
163			int saved_errno;
164
165			if (verbose) {
166			saved_errno = errno;
167			va_start(ap, emsg);
168			if (debug_length < ERRBUFSIZE - 1) {
169			l = vsnprintf(debug_ebuf + debug_length,
170			ERRBUFSIZE - debug_length, emsg, ap);
171			if (l < ERRBUFSIZE - debug_length)
172			debug_length += l;
173			else
174			debug_length = ERRBUFSIZE - 1;
175			}
176			va_end(ap);
177			errno = saved_errno;
178			}
179			}
180
181			static void
182			vfatalc(int error, const char *emsg, va_list ap)
183			{
184			char ebuf[ERRBUFSIZE];
185			const char *sep;
186
187			if (emsg != NULL) {
188			(void)vsnprintf(ebuf, sizeof(ebuf), emsg, ap);
189			sep = ": ";
190			} else {
191			ebuf[0] = '\0';
192			sep = "";
193			}
194			if (error)
195			logit(LOG_CRIT, "fatal in %s: %s%s%s",
196			log_procname, ebuf, sep, strerror(error));
197			else
198			logit(LOG_CRIT, "fatal in %s%s%s", log_procname, sep, ebuf);
199			}
200
201			void
202			fatal(const char *emsg, ...)
203			{
204			va_list ap;
205
206			va_start(ap, emsg);
207			vfatalc(errno, emsg, ap);
208			va_end(ap);
209			die(0);
210			}
211
212			void
213			fatalx(const char *emsg, ...)
214			{
215			va_list ap;
216
217			va_start(ap, emsg);
218			vfatalc(0, emsg, ap);
219			va_end(ap);
220			die(0);
221			}