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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/tmux/log.c	Lines:	14	64	21.9 %
Date:	2017-11-07	Branches:	2	20	10.0 %


/* $OpenBSD: log.c,v 1.25 2017/06/04 08:25:57 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 *
 * 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 MIND, 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 <sys/types.h>

#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <vis.h>

#include "tmux.h"

static FILE	*log_file;
static int	 log_level;

static void	 log_event_cb(int, const char *);
static void	 log_vwrite(const char *, va_list);

/* Log callback for libevent. */
static void
log_event_cb(__unused int severity, const char *msg)
{
	log_debug("%s", msg);
}

/* Increment log level. */
void
log_add_level(void)
{
	log_level++;
}

/* Get log level. */
int
log_get_level(void)
{
	return (log_level);
}

/* Open logging to file. */
void
log_open(const char *name)
{
	char	*path;

	if (log_level == 0)
		return;
	log_close();

	xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid());
	log_file = fopen(path, "a");
	free(path);
	if (log_file == NULL)
		return;

	setvbuf(log_file, NULL, _IOLBF, 0);
	event_set_log_callback(log_event_cb);
}

/* Toggle logging. */
void
log_toggle(const char *name)
{
	if (log_level == 0) {
		log_level = 1;
		log_open(name);
		log_debug("log opened");
	} else {
		log_debug("log closed");
		log_level = 0;
		log_close();
	}
}

/* Close logging. */
void
log_close(void)
{
	if (log_file != NULL)
		fclose(log_file);
	log_file = NULL;

	event_set_log_callback(NULL);
}

/* Write a log message. */
static void
log_vwrite(const char *msg, va_list ap)
{
	char		*fmt, *out;
	struct timeval	 tv;

	if (log_file == NULL)
		return;

	if (vasprintf(&fmt, msg, ap) == -1)
		exit(1);
	if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1)
		exit(1);

	gettimeofday(&tv, NULL);
	if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec,
	    (int)tv.tv_usec, out) == -1)
		exit(1);
	fflush(log_file);

	free(out);
	free(fmt);
}

/* Log a debug message. */
void
log_debug(const char *msg, ...)
{
	va_list	ap;

	va_start(ap, msg);
	log_vwrite(msg, ap);
	va_end(ap);
}

/* Log a critical error with error string and die. */
__dead void
fatal(const char *msg, ...)
{
	char	*fmt;
	va_list	 ap;

	va_start(ap, msg);
	if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
		exit(1);
	log_vwrite(fmt, ap);
	va_end(ap);
	exit(1);
}

/* Log a critical error and die. */
__dead void
fatalx(const char *msg, ...)
{
	char	*fmt;
	va_list	 ap;

	va_start(ap, msg);
	if (asprintf(&fmt, "fatal: %s", msg) == -1)
		exit(1);
	log_vwrite(fmt, ap);
	va_end(ap);
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: log.c,v 1.25 2017/06/04 08:25:57 nicm Exp $ */
2
3			/*
4			* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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 MIND, USE, DATA OR PROFITS, WHETHER
15			* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16			* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20
21			#include <errno.h>
22			#include <stdio.h>
23			#include <stdlib.h>
24			#include <string.h>
25			#include <unistd.h>
26			#include <vis.h>
27
28			#include "tmux.h"
29
30			static FILE *log_file;
31			static int log_level;
32
33			static void log_event_cb(int, const char *);
34			static void log_vwrite(const char *, va_list);
35
36			/* Log callback for libevent. */
37			static void
38			log_event_cb(__unused int severity, const char *msg)
39			{
40			log_debug("%s", msg);
41			}
42
43			/* Increment log level. */
44			void
45			log_add_level(void)
46			{
47			log_level++;
48			}
49
50			/* Get log level. */
51			int
52			log_get_level(void)
53			{
54			return (log_level);
55			}
56
57			/* Open logging to file. */
58			void
59			log_open(const char *name)
60			{
61		10	char *path;
62
63	✓✗	5	if (log_level == 0)
64		5	return;
65			log_close();
66
67			xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid());
68			log_file = fopen(path, "a");
69			free(path);
70			if (log_file == NULL)
71			return;
72
73			setvbuf(log_file, NULL, _IOLBF, 0);
74			event_set_log_callback(log_event_cb);
75		5	}
76
77			/* Toggle logging. */
78			void
79			log_toggle(const char *name)
80			{
81			if (log_level == 0) {
82			log_level = 1;
83			log_open(name);
84			log_debug("log opened");
85			} else {
86			log_debug("log closed");
87			log_level = 0;
88			log_close();
89			}
90			}
91
92			/* Close logging. */
93			void
94			log_close(void)
95			{
96			if (log_file != NULL)
97			fclose(log_file);
98			log_file = NULL;
99
100			event_set_log_callback(NULL);
101			}
102
103			/* Write a log message. */
104			static void
105			log_vwrite(const char *msg, va_list ap)
106			{
107		354	char fmt, out;
108		177	struct timeval tv;
109
110	✓✗	177	if (log_file == NULL)
111		177	return;
112
113			if (vasprintf(&fmt, msg, ap) == -1)
114			exit(1);
115			if (stravis(&out, fmt, VIS_OCTAL\|VIS_CSTYLE\|VIS_TAB\|VIS_NL) == -1)
116			exit(1);
117
118			gettimeofday(&tv, NULL);
119			if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec,
120			(int)tv.tv_usec, out) == -1)
121			exit(1);
122			fflush(log_file);
123
124			free(out);
125			free(fmt);
126		177	}
127
128			/* Log a debug message. */
129			void
130			log_debug(const char *msg, ...)
131			{
132		354	va_list ap;
133
134		177	va_start(ap, msg);
135		177	log_vwrite(msg, ap);
136		177	va_end(ap);
137		177	}
138
139			/* Log a critical error with error string and die. */
140			__dead void
141			fatal(const char *msg, ...)
142			{
143			char *fmt;
144			va_list ap;
145
146			va_start(ap, msg);
147			if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
148			exit(1);
149			log_vwrite(fmt, ap);
150			va_end(ap);
151			exit(1);
152			}
153
154			/* Log a critical error and die. */
155			__dead void
156			fatalx(const char *msg, ...)
157			{
158			char *fmt;
159			va_list ap;
160
161			va_start(ap, msg);
162			if (asprintf(&fmt, "fatal: %s", msg) == -1)
163			exit(1);
164			log_vwrite(fmt, ap);
165			va_end(ap);
166			exit(1);
167			}