140 lines
2.9 KiB
C
140 lines
2.9 KiB
C
/* -*- Mode: C ; c-basic-offset: 2 -*- */
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/*
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* ALSA SEQ < - > JACK MIDI bridge
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*
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* Copyright (c) 2008,2009,2010 Nedko Arnaudov <nedko@arnaudov.name>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdbool.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <time.h>
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#include <sys/stat.h>
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#include "log.h"
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#include "paths.h"
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static ino_t g_log_file_ino;
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static FILE * g_logfile = NULL;
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static bool a2j_log_open(void)
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{
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struct stat st;
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int ret;
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int retry;
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if (g_logfile != NULL)
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{
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ret = stat(g_a2j_log_path, &st);
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if (ret != 0 || g_log_file_ino != st.st_ino)
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{
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fclose(g_logfile);
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}
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else
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{
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return true;
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}
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}
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for (retry = 0; retry < 10; retry++)
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{
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g_logfile = fopen(g_a2j_log_path, "a");
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if (g_logfile == NULL)
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{
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fprintf(stderr, "Cannot open a2jmidid log file \"%s\": %d (%s)\n", g_a2j_log_path, errno, strerror(errno));
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return false;
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}
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ret = stat(g_a2j_log_path, &st);
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if (ret == 0)
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{
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g_log_file_ino = st.st_ino;
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return true;
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}
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fclose(g_logfile);
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g_logfile = NULL;
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}
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fprintf(stderr, "Cannot stat just opened a2jmidid log file \"%s\": %d (%s). %d retries\n", g_a2j_log_path, errno, strerror(errno), retry);
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return false;
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}
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bool a2j_log_init(bool use_logfile)
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{
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if (use_logfile)
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{
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return a2j_log_open();
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}
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return true;
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}
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void a2j_log_uninit(void)
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{
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if (g_logfile != NULL)
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{
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fclose(g_logfile);
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}
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}
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void
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a2j_log(
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unsigned int level,
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const char * format,
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...)
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{
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va_list ap;
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FILE * stream;
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time_t timestamp;
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char timestamp_str[26];
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if (g_logfile != NULL && a2j_log_open())
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{
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stream = g_logfile;
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}
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else
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{
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switch (level)
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{
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case A2J_LOG_LEVEL_DEBUG:
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case A2J_LOG_LEVEL_INFO:
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stream = stdout;
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break;
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case A2J_LOG_LEVEL_ERROR:
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default:
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stream = stderr;
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}
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}
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if (g_logfile != NULL)
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{
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time(×tamp);
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ctime_r(×tamp, timestamp_str);
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timestamp_str[24] = 0;
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fprintf(stream, "%s: ", timestamp_str);
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}
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va_start(ap, format);
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vfprintf(stream, format, ap);
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fflush(stream);
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va_end(ap);
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}
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