external/gpl2/lvm2/dist/lib/log/log.h

   1 /*      $NetBSD$        */
   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