logging.c

/*
 * Copyright 2016-2017 Fazio Bai <yang.bai@bitmain.com>
 * Copyright 2016-2017 Clement Duan <kai.duan@bitmain.com>
 * Copyright 2016 Miguel Padilla
 * Copyright 2011-2012 Con Kolivas
 * Copyright 2013 Andrew Smith
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 3 of the License, or (at your option)
 * any later version.  See COPYING for more details.
 */

#include "config.h"
#include <unistd.h>

#include "logging.h"
#include "miner.h"

bool opt_debug              = false;
bool opt_log_output         = false;
/* per default priorities higher than LOG_NOTICE are logged */
int opt_log_level           = LOG_NOTICE;
FILE * g_log_file           = NULL;
bool g_logfile_enable       = false;
char g_logfile_path[256]    = {0};
char g_logfile_openflag[32] = {0};

static void my_log_curses(int prio, const char *datetime, const char *str, bool force)
{
    if (opt_quiet && prio != LOG_ERR)
    {
        return;
    }

    /* Mutex could be locked by dead thread on shutdown so forcelog will
     * invalidate any console lock status. */
    if (force)
    {
        mutex_trylock(&console_lock);
        mutex_unlock(&console_lock);
    }

#ifdef HAVE_CURSES
    extern bool use_curses;

    if (use_curses && log_curses_only(prio, datetime, str))
        ;
    else
#endif
    {
        mutex_lock(&console_lock);
        printf("%s%s%s", datetime, str, "                    \n");
        mutex_unlock(&console_lock);
    }
}

/* high-level logging function, based on global opt_log_level */

/*
 * log function
 */
void _applog(int prio, const char *str, bool force)
{
#ifdef HAVE_SYSLOG_H
    if (use_syslog)
    {
        syslog(LOG_LOCAL0 | prio, "%s", str);
    }
#else
    if (0) {} //for what do we need this?
#endif
    else
    {
        char datetime[64];
        struct timeval tv = {0, 0};
        struct tm *tm;

        cgtime(&tv);

        const time_t tmp_time = tv.tv_sec;
        int ms = (int)(tv.tv_usec / 1000);
        tm = localtime(&tmp_time);

        snprintf(datetime, sizeof(datetime), " [%d-%02d-%02d %02d:%02d:%02d.%03d] ",
                 tm->tm_year + 1900,
                 tm->tm_mon + 1,
                 tm->tm_mday,
                 tm->tm_hour,
                 tm->tm_min,
                 tm->tm_sec, ms);

        /* Only output to stderr if it's not going to the screen as well */
        if (!isatty(fileno((FILE *)stderr)))
        {
            fprintf(stderr, "%s%s\n", datetime, str);   /* atomic write to stderr */
            fflush(stderr);
        }
        if(g_logfile_enable)
        {

            if(!g_log_file)
            {
                g_log_file = fopen(g_logfile_path, g_logfile_openflag);
            }

            if(g_log_file)
            {
                fwrite(datetime, strlen(datetime), 1, g_log_file);
                fwrite(str, strlen(str), 1, g_log_file);
                fwrite("\n", 1, 1, g_log_file);
                fflush(g_log_file);
            }
        }

        my_log_curses(prio, datetime, str, force);
    }
}

void _simplelog(int prio, const char *str, bool force)
{
#ifdef HAVE_SYSLOG_H
    if (use_syslog)
    {
        syslog(LOG_LOCAL0 | prio, "%s", str);
    }
#else
    if (0) {}
#endif
    else
    {
        /* Only output to stderr if it's not going to the screen as well */

        if (!isatty(fileno((FILE *)stderr)))
        {
            fprintf(stderr, "%s\n", str);   /* atomic write to stderr */
            fflush(stderr);
        }

        my_log_curses(prio, "", str, force);
    }
}

void save_last_quit(int status, const char *str)
{
	FILE *fw;

	/* Do not save reasons for exit with exit status 0.
	 * This is to not confuse user with messages that look like they mean
	 * something but they don't, ie.:
	 * 	"Last quit reason: Shutdown signal received."
	 * that reminiscences famous "Error: Success" error.
	 * The question is, should we also delete the quit file if we exit
	 * on request, not on error?
	 */
	if (status == 0)
		return;

	fw = fopen(SAVE_LAST_QUIT_FILE, "w");
	if (fw == NULL)
		return;
	fputs(str, fw);
	fputc('\n', fw);
	fclose(fw);
}