/* * Copyright 2016 Jakub Klama <jceel@FreeBSD.org> * All rights reserved * * Redistribution and use in source and binary forms, with or without * modification, are permitted providing that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * */ #include <stdio.h> #include <stdlib.h> #include <stdarg.h> #include <string.h> #include "log.h" static const char *l9p_log_level_names[] = { "DEBUG", "INFO", "WARN", "ERROR" }; void l9p_logf(enum l9p_log_level level, const char *func, const char *fmt, ...) { const char *dest = NULL; static FILE *stream = NULL; va_list ap; if (stream == NULL) { dest = getenv("LIB9P_LOGGING"); if (dest == NULL) return; else if (!strcmp(dest, "stderr")) stream = stderr; else { stream = fopen(dest, "a"); if (stream == NULL) return; } } va_start(ap, fmt); fprintf(stream, "[%s]\t %s: ", l9p_log_level_names[level], func); vfprintf(stream, fmt, ap); fprintf(stream, "\n"); fflush(stream); va_end(ap); }