1 /* $NetBSD: log.h,v 1.1.1.2 2009/12/02 00:26:22 haad Exp $ */ 2 3 /* 4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. 5 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. 6 * 7 * This file is part of LVM2. 8 * 9 * This copyrighted material is made available to anyone wishing to use, 10 * modify, copy, or redistribute it subject to the terms and conditions 11 * of the GNU Lesser General Public License v.2.1. 12 * 13 * You should have received a copy of the GNU Lesser General Public License 14 * along with this program; if not, write to the Free Software Foundation, 15 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 16 */ 17 18 #ifndef _LVM_LOG_H 19 #define _LVM_LOG_H 20 21 #include <errno.h> 22 23 /* 24 * printf()-style macros to use for messages: 25 * 26 * log_error - always print to stderr. 27 * log_print - always print to stdout. Use this instead of printf. 28 * log_verbose - print to stdout if verbose is set (-v) 29 * log_very_verbose - print to stdout if verbose is set twice (-vv) 30 * log_debug - print to stdout if verbose is set three times (-vvv) 31 * 32 * In addition, messages will be logged to file or syslog if they 33 * are more serious than the log level specified with the log/debug_level 34 * parameter in the configuration file. These messages get the file 35 * and line number prepended. 'stack' (without arguments) can be used 36 * to log this information at debug level. 37 * 38 * log_sys_error and log_sys_very_verbose are for errors from system calls 39 * e.g. log_sys_error("stat", filename); 40 * /dev/fd/7: stat failed: No such file or directory 41 * 42 */ 43 44 #include <stdio.h> /* FILE */ 45 #include <string.h> /* strerror() */ 46 #include <errno.h> 47 48 #define EUNCLASSIFIED -1 /* Generic error code */ 49 50 #define _LOG_STDERR 128 /* force things to go to stderr, even if loglevel 51 would make them go to stdout */ 52 #define _LOG_DEBUG 7 53 #define _LOG_INFO 6 54 #define _LOG_NOTICE 5 55 #define _LOG_WARN 4 56 #define _LOG_ERR 3 57 #define _LOG_FATAL 2 58 59 #define log_debug(x...) LOG_LINE(_LOG_DEBUG, x) 60 #define log_info(x...) LOG_LINE(_LOG_INFO, x) 61 #define log_notice(x...) LOG_LINE(_LOG_NOTICE, x) 62 #define log_warn(x...) LOG_LINE(_LOG_WARN | _LOG_STDERR, x) 63 #define log_err(x...) LOG_LINE_WITH_ERRNO(_LOG_ERR, EUNCLASSIFIED, x) 64 #define log_fatal(x...) LOG_LINE_WITH_ERRNO(_LOG_FATAL, EUNCLASSIFIED, x) 65 66 #define stack log_debug("<backtrace>") /* Backtrace on error */ 67 #define log_very_verbose(args...) log_info(args) 68 #define log_verbose(args...) log_notice(args) 69 #define log_print(args...) LOG_LINE(_LOG_WARN, args) 70 #define log_error(args...) log_err(args) 71 #define log_errno(args...) LOG_LINE_WITH_ERRNO(_LOG_ERR, args) 72 73 /* System call equivalents */ 74 #define log_sys_error(x, y) \ 75 log_err("%s: %s failed: %s", y, x, strerror(errno)) 76 #define log_sys_very_verbose(x, y) \ 77 log_info("%s: %s failed: %s", y, x, strerror(errno)) 78 #define log_sys_debug(x, y) \ 79 log_debug("%s: %s failed: %s", y, x, strerror(errno)) 80 81 #define return_0 do { stack; return 0; } while (0) 82 #define return_NULL do { stack; return NULL; } while (0) 83 #define goto_out do { stack; goto out; } while (0) 84 #define goto_bad do { stack; goto bad; } while (0) 85 86 #endif 87