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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_LOG_H
#define _LVM_LOG_H
/*
* printf()-style macros to use for messages:
*
* log_error - always print to stderr.
* log_print - always print to stdout. Use this instead of printf.
* log_verbose - print to stdout if verbose is set (-v)
* log_very_verbose - print to stdout if verbose is set twice (-vv)
* log_debug - print to stdout if verbose is set three times (-vvv)
*
* In addition, messages will be logged to file or syslog if they
* are more serious than the log level specified with the log/debug_level
* parameter in the configuration file. These messages get the file
* and line number prepended. 'stack' (without arguments) can be used
* to log this information at debug level.
*
* log_sys_error and log_sys_very_verbose are for errors from system calls
* e.g. log_sys_error("stat", filename);
* /dev/fd/7: stat failed: No such file or directory
*
*/
#include <stdio.h> /* FILE */
#include <string.h> /* strerror() */
#include <errno.h>
#define EUNCLASSIFIED -1 /* Generic error code */
#define _LOG_STDERR 128 /* force things to go to stderr, even if loglevel
would make them go to stdout */
#define _LOG_ONCE 256 /* downgrade to NOTICE if this has been already logged */
#define _LOG_DEBUG 7
#define _LOG_INFO 6
#define _LOG_NOTICE 5
#define _LOG_WARN 4
#define _LOG_ERR 3
#define _LOG_FATAL 2
#define INTERNAL_ERROR "Internal error: "
#define log_debug(x...) LOG_LINE(_LOG_DEBUG, x)
#define log_info(x...) LOG_LINE(_LOG_INFO, x)
#define log_notice(x...) LOG_LINE(_LOG_NOTICE, x)
#define log_warn(x...) LOG_LINE(_LOG_WARN | _LOG_STDERR, x)
#define log_warn_suppress(s, x...) LOG_LINE(s ? _LOG_NOTICE : _LOG_WARN | _LOG_STDERR, x)
#define log_err(x...) LOG_LINE_WITH_ERRNO(_LOG_ERR, EUNCLASSIFIED, x)
#define log_err_suppress(s, x...) LOG_LINE_WITH_ERRNO(s ? _LOG_NOTICE : _LOG_ERR, EUNCLASSIFIED, x)
#define log_err_once(x...) LOG_LINE_WITH_ERRNO(_LOG_ERR | _LOG_ONCE, EUNCLASSIFIED, x)
#define log_fatal(x...) LOG_LINE_WITH_ERRNO(_LOG_FATAL, EUNCLASSIFIED, x)
#define stack log_debug("<backtrace>") /* Backtrace on error */
#define log_very_verbose(args...) log_info(args)
#define log_verbose(args...) log_notice(args)
#define log_print(args...) LOG_LINE(_LOG_WARN, args)
#define log_print_unless_silent(args...) LOG_LINE(silent_mode() ? _LOG_NOTICE : _LOG_WARN, args)
#define log_error(args...) log_err(args)
#define log_error_suppress(s, args...) log_err_suppress(s, args)
#define log_error_once(args...) log_err_once(args)
#define log_errno(args...) LOG_LINE_WITH_ERRNO(_LOG_ERR, args)
/* System call equivalents */
#define log_sys_error(x, y) \
log_err("%s: %s failed: %s", y, x, strerror(errno))
#define log_sys_error_suppress(s, x, y) \
log_err_suppress(s, "%s: %s failed: %s", y, x, strerror(errno))
#define log_sys_very_verbose(x, y) \
log_info("%s: %s failed: %s", y, x, strerror(errno))
#define log_sys_debug(x, y) \
log_debug("%s: %s failed: %s", y, x, strerror(errno))
#define return_0 do { stack; return 0; } while (0)
#define return_NULL do { stack; return NULL; } while (0)
#define goto_out do { stack; goto out; } while (0)
#define goto_bad do { stack; goto bad; } while (0)
#endif
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