2 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
3 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
5 * This file is part of LVM2.
7 * This copyrighted material is made available to anyone wishing to use,
8 * modify, copy, or redistribute it subject to the terms and conditions
9 * of the GNU Lesser General Public License v.2.1.
11 * You should have received a copy of the GNU Lesser General Public License
12 * along with this program; if not, write to the Free Software Foundation,
13 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * printf()-style macros to use for messages:
22 * log_error - always print to stderr.
23 * log_print - always print to stdout. Use this instead of printf.
24 * log_verbose - print to stdout if verbose is set (-v)
25 * log_very_verbose - print to stdout if verbose is set twice (-vv)
26 * log_debug - print to stdout if verbose is set three times (-vvv)
28 * In addition, messages will be logged to file or syslog if they
29 * are more serious than the log level specified with the log/debug_level
30 * parameter in the configuration file. These messages get the file
31 * and line number prepended. 'stack' (without arguments) can be used
32 * to log this information at debug level.
34 * log_sys_error and log_sys_very_verbose are for errors from system calls
35 * e.g. log_sys_error("stat", filename);
36 * /dev/fd/7: stat failed: No such file or directory
40 #include <stdio.h> /* FILE */
41 #include <string.h> /* strerror() */
44 #define EUNCLASSIFIED -1 /* Generic error code */
46 #define _LOG_STDERR 128 /* force things to go to stderr, even if loglevel
47 would make them go to stdout */
48 #define _LOG_ONCE 256 /* downgrade to NOTICE if this has been already logged */
55 #define INTERNAL_ERROR "Internal error: "
57 #define log_debug(x...) LOG_LINE(_LOG_DEBUG, x)
58 #define log_info(x...) LOG_LINE(_LOG_INFO, x)
59 #define log_notice(x...) LOG_LINE(_LOG_NOTICE, x)
60 #define log_warn(x...) LOG_LINE(_LOG_WARN | _LOG_STDERR, x)
61 #define log_warn_suppress(s, x...) LOG_LINE(s ? _LOG_NOTICE : _LOG_WARN | _LOG_STDERR, x)
62 #define log_err(x...) LOG_LINE_WITH_ERRNO(_LOG_ERR, EUNCLASSIFIED, x)
63 #define log_err_suppress(s, x...) LOG_LINE_WITH_ERRNO(s ? _LOG_NOTICE : _LOG_ERR, EUNCLASSIFIED, x)
64 #define log_err_once(x...) LOG_LINE_WITH_ERRNO(_LOG_ERR | _LOG_ONCE, EUNCLASSIFIED, x)
65 #define log_fatal(x...) LOG_LINE_WITH_ERRNO(_LOG_FATAL, EUNCLASSIFIED, x)
67 #define stack log_debug("<backtrace>") /* Backtrace on error */
68 #define log_very_verbose(args...) log_info(args)
69 #define log_verbose(args...) log_notice(args)
70 #define log_print(args...) LOG_LINE(_LOG_WARN, args)
71 #define log_error(args...) log_err(args)
72 #define log_error_suppress(s, args...) log_err_suppress(s, args)
73 #define log_error_once(args...) log_err_once(args)
74 #define log_errno(args...) LOG_LINE_WITH_ERRNO(_LOG_ERR, args)
76 /* System call equivalents */
77 #define log_sys_error(x, y) \
78 log_err("%s: %s failed: %s", y, x, strerror(errno))
79 #define log_sys_very_verbose(x, y) \
80 log_info("%s: %s failed: %s", y, x, strerror(errno))
81 #define log_sys_debug(x, y) \
82 log_debug("%s: %s failed: %s", y, x, strerror(errno))
84 #define return_0 do { stack; return 0; } while (0)
85 #define return_NULL do { stack; return NULL; } while (0)
86 #define goto_out do { stack; goto out; } while (0)
87 #define goto_bad do { stack; goto bad; } while (0)