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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/snmpd/log.c	Lines:	34	80	42.5 %
Date:	2017-11-07	Branches:	5	18	27.8 %


/*	$OpenBSD: log.c,v 1.16 2017/03/21 12:06:56 bluhm Exp $	*/

/*
 * Copyright (c) 2003, 2004 Henning Brauer <henning@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 <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <syslog.h>
#include <errno.h>
#include <time.h>

static int	 debug;
static int	 verbose;
const char	*log_procname;

void	log_init(int, int);
void	log_procinit(const char *);
void	log_setverbose(int);
int	log_getverbose(void);
void	log_warn(const char *, ...)
	    __attribute__((__format__ (printf, 1, 2)));
void	log_warnx(const char *, ...)
	    __attribute__((__format__ (printf, 1, 2)));
void	log_info(const char *, ...)
	    __attribute__((__format__ (printf, 1, 2)));
void	log_debug(const char *, ...)
	    __attribute__((__format__ (printf, 1, 2)));
void	logit(int, const char *, ...)
	    __attribute__((__format__ (printf, 2, 3)));
void	vlog(int, const char *, va_list)
	    __attribute__((__format__ (printf, 2, 0)));
__dead void fatal(const char *, ...)
	    __attribute__((__format__ (printf, 1, 2)));
__dead void fatalx(const char *, ...)
	    __attribute__((__format__ (printf, 1, 2)));

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

	debug = n_debug;
	verbose = n_debug;
	log_procinit(__progname);

	if (!debug)
		openlog(__progname, LOG_PID | LOG_NDELAY, facility);

	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)
{
	char	*nfmt;
	int	 saved_errno = errno;

	if (debug) {
		/* best effort in out of mem situations */
		if (asprintf(&nfmt, "%s\n", fmt) == -1) {
			vfprintf(stderr, fmt, ap);
			fprintf(stderr, "\n");
		} else {
			vfprintf(stderr, nfmt, ap);
			free(nfmt);
		}
		fflush(stderr);
	} else
		vsyslog(pri, fmt, ap);

	errno = saved_errno;
}

void
log_warn(const char *emsg, ...)
{
	char		*nfmt;
	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);

		if (asprintf(&nfmt, "%s: %s", emsg,
		    strerror(saved_errno)) == -1) {
			/* we tried it... */
			vlog(LOG_ERR, emsg, ap);
			logit(LOG_ERR, "%s", strerror(saved_errno));
		} else {
			vlog(LOG_ERR, nfmt, ap);
			free(nfmt);
		}
		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(const char *emsg, ...)
{
	va_list	 ap;

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

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

	if (verbose > 1) {
		va_start(ap, emsg);
		vlog(LOG_DEBUG, emsg, ap);
		va_end(ap);
	}
}

static void
vfatalc(int code, const char *emsg, va_list ap)
{
	static char	s[BUFSIZ];
	const char	*sep;

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

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

	va_start(ap, emsg);
	vfatalc(errno, emsg, ap);
	va_end(ap);
	exit(1);
}

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

	va_start(ap, emsg);
	vfatalc(0, emsg, ap);
	va_end(ap);
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: log.c,v 1.16 2017/03/21 12:06:56 bluhm Exp $ */
2
3			/*
4			* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <stdio.h>
20			#include <stdlib.h>
21			#include <stdarg.h>
22			#include <string.h>
23			#include <syslog.h>
24			#include <errno.h>
25			#include <time.h>
26
27			static int debug;
28			static int verbose;
29			const char *log_procname;
30
31			void log_init(int, int);
32			void log_procinit(const char *);
33			void log_setverbose(int);
34			int log_getverbose(void);
35			void log_warn(const char *, ...)
36			__attribute__((__format__ (printf, 1, 2)));
37			void log_warnx(const char *, ...)
38			__attribute__((__format__ (printf, 1, 2)));
39			void log_info(const char *, ...)
40			__attribute__((__format__ (printf, 1, 2)));
41			void log_debug(const char *, ...)
42			__attribute__((__format__ (printf, 1, 2)));
43			void logit(int, const char *, ...)
44			__attribute__((__format__ (printf, 2, 3)));
45			void vlog(int, const char *, va_list)
46			__attribute__((__format__ (printf, 2, 0)));
47			__dead void fatal(const char *, ...)
48			__attribute__((__format__ (printf, 1, 2)));
49			__dead void fatalx(const char *, ...)
50			__attribute__((__format__ (printf, 1, 2)));
51
52			void
53			log_init(int n_debug, int facility)
54			{
55			extern char *__progname;
56
57		64	debug = n_debug;
58		32	verbose = n_debug;
59		32	log_procinit(__progname);
60
61	✗✓	32	if (!debug)
62			openlog(__progname, LOG_PID \| LOG_NDELAY, facility);
63
64		32	tzset();
65		32	}
66
67			void
68			log_procinit(const char *procname)
69			{
70	✓✗	96	if (procname != NULL)
71		48	log_procname = procname;
72		48	}
73
74			void
75			log_setverbose(int v)
76			{
77		32	verbose = v;
78		16	}
79
80			int
81			log_getverbose(void)
82			{
83			return (verbose);
84			}
85
86			void
87			logit(int pri, const char *fmt, ...)
88			{
89			va_list ap;
90
91			va_start(ap, fmt);
92			vlog(pri, fmt, ap);
93			va_end(ap);
94			}
95
96			void
97			vlog(int pri, const char *fmt, va_list ap)
98			{
99		40	char *nfmt;
100		20	int saved_errno = errno;
101
102	✓✗	20	if (debug) {
103			/* best effort in out of mem situations */
104	✗✓	20	if (asprintf(&nfmt, "%s\n", fmt) == -1) {
105			vfprintf(stderr, fmt, ap);
106			fprintf(stderr, "\n");
107			} else {
108		20	vfprintf(stderr, nfmt, ap);
109		20	free(nfmt);
110			}
111		20	fflush(stderr);
112		20	} else
113			vsyslog(pri, fmt, ap);
114
115		20	errno = saved_errno;
116		20	}
117
118			void
119			log_warn(const char *emsg, ...)
120			{
121			char *nfmt;
122			va_list ap;
123			int saved_errno = errno;
124
125			/* best effort to even work in out of memory situations */
126			if (emsg == NULL)
127			logit(LOG_ERR, "%s", strerror(saved_errno));
128			else {
129			va_start(ap, emsg);
130
131			if (asprintf(&nfmt, "%s: %s", emsg,
132			strerror(saved_errno)) == -1) {
133			/* we tried it... */
134			vlog(LOG_ERR, emsg, ap);
135			logit(LOG_ERR, "%s", strerror(saved_errno));
136			} else {
137			vlog(LOG_ERR, nfmt, ap);
138			free(nfmt);
139			}
140			va_end(ap);
141			}
142
143			errno = saved_errno;
144			}
145
146			void
147			log_warnx(const char *emsg, ...)
148			{
149		8	va_list ap;
150
151		4	va_start(ap, emsg);
152		4	vlog(LOG_ERR, emsg, ap);
153		4	va_end(ap);
154		4	}
155
156			void
157			log_info(const char *emsg, ...)
158			{
159		32	va_list ap;
160
161		16	va_start(ap, emsg);
162		16	vlog(LOG_INFO, emsg, ap);
163		16	va_end(ap);
164		16	}
165
166			void
167			log_debug(const char *emsg, ...)
168			{
169		56	va_list ap;
170
171	✗✓	28	if (verbose > 1) {
172			va_start(ap, emsg);
173			vlog(LOG_DEBUG, emsg, ap);
174			va_end(ap);
175			}
176		28	}
177
178			static void
179			vfatalc(int code, const char *emsg, va_list ap)
180			{
181			static char s[BUFSIZ];
182			const char *sep;
183
184			if (emsg != NULL) {
185			(void)vsnprintf(s, sizeof(s), emsg, ap);
186			sep = ": ";
187			} else {
188			s[0] = '\0';
189			sep = "";
190			}
191			if (code)
192			logit(LOG_CRIT, "%s: %s%s%s",
193			log_procname, s, sep, strerror(code));
194			else
195			logit(LOG_CRIT, "%s%s%s", log_procname, sep, s);
196			}
197
198			void
199			fatal(const char *emsg, ...)
200			{
201			va_list ap;
202
203			va_start(ap, emsg);
204			vfatalc(errno, emsg, ap);
205			va_end(ap);
206			exit(1);
207			}
208
209			void
210			fatalx(const char *emsg, ...)
211			{
212			va_list ap;
213
214			va_start(ap, emsg);
215			vfatalc(0, emsg, ap);
216			va_end(ap);
217			exit(1);
218			}