GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/tmux/log.c Lines: 0 61 0.0 %
Date: 2017-11-13 Branches: 0 20 0.0 %

Line Branch Exec Source
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/* $OpenBSD: log.c,v 1.25 2017/06/04 08:25:57 nicm Exp $ */
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/*
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 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <vis.h>
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#include "tmux.h"
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static FILE	*log_file;
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static int	 log_level;
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static void	 log_event_cb(int, const char *);
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static void	 log_vwrite(const char *, va_list);
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/* Log callback for libevent. */
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static void
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log_event_cb(__unused int severity, const char *msg)
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{
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	log_debug("%s", msg);
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}
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/* Increment log level. */
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void
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log_add_level(void)
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{
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	log_level++;
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}
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/* Get log level. */
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int
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log_get_level(void)
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{
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	return (log_level);
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}
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/* Open logging to file. */
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void
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log_open(const char *name)
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{
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	char	*path;
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	if (log_level == 0)
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		return;
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	log_close();
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	xasprintf(&path, "tmux-%s-%ld.log", name, (long)getpid());
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	log_file = fopen(path, "a");
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	free(path);
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	if (log_file == NULL)
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		return;
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	setvbuf(log_file, NULL, _IOLBF, 0);
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	event_set_log_callback(log_event_cb);
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}
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/* Toggle logging. */
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void
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log_toggle(const char *name)
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{
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	if (log_level == 0) {
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		log_level = 1;
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		log_open(name);
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		log_debug("log opened");
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	} else {
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		log_debug("log closed");
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		log_level = 0;
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		log_close();
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	}
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}
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/* Close logging. */
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void
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log_close(void)
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{
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	if (log_file != NULL)
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		fclose(log_file);
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	log_file = NULL;
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	event_set_log_callback(NULL);
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}
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/* Write a log message. */
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static void
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log_vwrite(const char *msg, va_list ap)
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{
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	char		*fmt, *out;
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	struct timeval	 tv;
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	if (log_file == NULL)
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		return;
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	if (vasprintf(&fmt, msg, ap) == -1)
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		exit(1);
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	if (stravis(&out, fmt, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL) == -1)
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		exit(1);
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	gettimeofday(&tv, NULL);
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	if (fprintf(log_file, "%lld.%06d %s\n", (long long)tv.tv_sec,
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	    (int)tv.tv_usec, out) == -1)
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		exit(1);
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	fflush(log_file);
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	free(out);
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	free(fmt);
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}
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/* Log a debug message. */
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void
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log_debug(const char *msg, ...)
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{
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	va_list	ap;
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	va_start(ap, msg);
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	log_vwrite(msg, ap);
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	va_end(ap);
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}
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/* Log a critical error with error string and die. */
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__dead void
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fatal(const char *msg, ...)
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{
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	char	*fmt;
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	va_list	 ap;
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	va_start(ap, msg);
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	if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
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		exit(1);
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	log_vwrite(fmt, ap);
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	va_end(ap);
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	exit(1);
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}
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/* Log a critical error and die. */
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__dead void
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fatalx(const char *msg, ...)
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{
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	char	*fmt;
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	va_list	 ap;
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	va_start(ap, msg);
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	if (asprintf(&fmt, "fatal: %s", msg) == -1)
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		exit(1);
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	log_vwrite(fmt, ap);
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	va_end(ap);
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	exit(1);
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}