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/* $OpenBSD: log.c,v 1.6 2012/03/17 18:38:58 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* 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 <syslog.h>
#include <time.h>
#include "tmux.h"
/* Logging type. */
#define LOG_TYPE_OFF 0
#define LOG_TYPE_TTY 1
#define LOG_TYPE_FILE 2
int log_type = LOG_TYPE_OFF;
/* Log file, if needed. */
FILE *log_file;
/* Debug level. */
int log_level;
void log_event_cb(int, const char *);
void log_vwrite(int, const char *, va_list);
__dead void log_vfatal(const char *, va_list);
/* Log callback for libevent. */
void
log_event_cb(unused int severity, const char *msg)
{
log_warnx("%s", msg);
}
/* Open logging to tty. */
void
log_open_tty(int level)
{
log_type = LOG_TYPE_TTY;
log_level = level;
setlinebuf(stderr);
setlinebuf(stdout);
event_set_log_callback(log_event_cb);
tzset();
}
/* Open logging to file. */
void
log_open_file(int level, const char *path)
{
log_file = fopen(path, "w");
if (log_file == NULL)
return;
log_type = LOG_TYPE_FILE;
log_level = level;
setlinebuf(log_file);
event_set_log_callback(log_event_cb);
tzset();
}
/* Close logging. */
void
log_close(void)
{
if (log_type == LOG_TYPE_FILE)
fclose(log_file);
event_set_log_callback(NULL);
log_type = LOG_TYPE_OFF;
}
/* Write a log message. */
void
log_vwrite(int pri, const char *msg, va_list ap)
{
char *fmt;
FILE *f = log_file;
switch (log_type) {
case LOG_TYPE_TTY:
if (pri == LOG_INFO)
f = stdout;
else
f = stderr;
/* FALLTHROUGH */
case LOG_TYPE_FILE:
if (asprintf(&fmt, "%s\n", msg) == -1)
exit(1);
if (vfprintf(f, fmt, ap) == -1)
exit(1);
fflush(f);
free(fmt);
break;
}
}
/* Log a warning with error string. */
void printflike1
log_warn(const char *msg, ...)
{
va_list ap;
char *fmt;
va_start(ap, msg);
if (asprintf(&fmt, "%s: %s", msg, strerror(errno)) == -1)
exit(1);
log_vwrite(LOG_CRIT, fmt, ap);
free(fmt);
va_end(ap);
}
/* Log a warning. */
void printflike1
log_warnx(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
log_vwrite(LOG_CRIT, msg, ap);
va_end(ap);
}
/* Log an informational message. */
void printflike1
log_info(const char *msg, ...)
{
va_list ap;
if (log_level > -1) {
va_start(ap, msg);
log_vwrite(LOG_INFO, msg, ap);
va_end(ap);
}
}
/* Log a debug message. */
void printflike1
log_debug(const char *msg, ...)
{
va_list ap;
if (log_level > 0) {
va_start(ap, msg);
log_vwrite(LOG_DEBUG, msg, ap);
va_end(ap);
}
}
/* Log a debug message at level 2. */
void printflike1
log_debug2(const char *msg, ...)
{
va_list ap;
if (log_level > 1) {
va_start(ap, msg);
log_vwrite(LOG_DEBUG, msg, ap);
va_end(ap);
}
}
/* Log a critical error, with error string if necessary, and die. */
__dead void
log_vfatal(const char *msg, va_list ap)
{
char *fmt;
if (errno != 0) {
if (asprintf(&fmt, "fatal: %s: %s", msg, strerror(errno)) == -1)
exit(1);
log_vwrite(LOG_CRIT, fmt, ap);
} else {
if (asprintf(&fmt, "fatal: %s", msg) == -1)
exit(1);
log_vwrite(LOG_CRIT, fmt, ap);
}
free(fmt);
exit(1);
}
/* Log a critical error, with error string, and die. */
__dead void printflike1
log_fatal(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
log_vfatal(msg, ap);
}
/* Log a critical error and die. */
__dead void printflike1
log_fatalx(const char *msg, ...)
{
va_list ap;
errno = 0;
va_start(ap, msg);
log_vfatal(msg, ap);
}
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