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/*
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* Copyright ( C ) 2001 - 2004 Sistina Software , Inc . All rights reserved .
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* Copyright ( C ) 2004 - 2007 Red Hat , Inc . All rights reserved .
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*
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* 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
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* of the GNU Lesser General Public License v .2 .1 .
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program ; if not , write to the Free Software Foundation ,
* Inc . , 59 Temple Place , Suite 330 , Boston , MA 02111 - 1307 USA
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*/
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# ifndef _LVM_LOG_H
# define _LVM_LOG_H
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# include <errno.h>
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/*
* 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
*
*/
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# include <stdio.h> /* FILE */
# include <string.h> /* strerror() */
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# include <errno.h>
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# define EUNCLASSIFIED -1 /* Generic error code */
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# define _LOG_STDERR 128 / * force things to go to stderr, even if loglevel
would make them go to stdout */
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# define _LOG_DEBUG 7
# define _LOG_INFO 6
# define _LOG_NOTICE 5
# define _LOG_WARN 4
# define _LOG_ERR 3
# define _LOG_FATAL 2
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# 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)
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# define log_err(x...) LOG_LINE_WITH_ERRNO(_LOG_ERR, EUNCLASSIFIED, x)
# define log_fatal(x...) LOG_LINE_WITH_ERRNO(_LOG_FATAL, EUNCLASSIFIED, x)
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# define stack log_debug("<backtrace>") /* Backtrace on error */
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# define log_very_verbose(args...) log_info(args)
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# define log_verbose(args...) log_notice(args)
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# define log_print(args...) LOG_LINE(_LOG_WARN, args)
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# define log_error(args...) log_err(args)
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# define log_errno(args...) LOG_LINE_WITH_ERRNO(_LOG_ERR, args)
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/* System call equivalents */
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# define log_sys_error(x, y) \
log_err ( " %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 ) )
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# define log_sys_debug(x, y) \
log_debug ( " %s: %s failed: %s " , y , x , strerror ( errno ) )
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# 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)
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# define goto_bad do { stack; goto bad; } while (0)
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# endif