1/* $NetBSD: log.h,v 1.1.1.2 2009/12/02 00:25:43 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