2 * Amanda, The Advanced Maryland Automatic Network Disk Archiver
3 * Copyright (c) 1991-1999 University of Maryland at College Park
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the name of U.M. not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission. U.M. makes no representations about the
13 * suitability of this software for any purpose. It is provided "as is"
14 * without express or implied warranty.
16 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
18 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
21 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * Authors: the Amanda Development Team. Its members are listed in a
24 * file named AUTHORS, in the root directory of this distribution.
27 * $Id: debug.h 6789 2007-06-18 20:18:52Z dustin $
32 /* this file is included from amanda.h; there is no need to include
33 * it explicitly in source files. */
35 #ifndef AMANDA_DEBUG_H
36 #define AMANDA_DEBUG_H
42 /* Amanda uses glib's logging facilities. See
43 * http://developer.gnome.org/doc/API/2.2/glib/glib-Message-Logging.html
45 * Note that log output will go to stderr until debug_open is called.
47 * The error levels are assigned as follows:
48 * g_error -- errors that should dump core (will not return)
49 * g_critical -- fatal errors, exiting with exit status in
50 * error_exit_status() (will not return)
51 * g_warning -- non-fatal problems
52 * g_message -- normal status information
53 * g_info -- helpful extra details, but not verbose
54 * g_debug -- debug messages
57 /* g_debug was introduced in glib 2.6, so define it here for systems where
58 * it is lacking. g_info doesn't exist even in glib 2.13, but maybe it will
63 #define g_debug(...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, __VA_ARGS__)
67 #define g_info(...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, __VA_ARGS__)
70 /* Initialize the debugging interface. This is the "high-level"
71 * initialization function; older and lower-level applications can call
72 * dbopen() and friends directly.
74 * This function sets up debug logging and error-handling according to
75 * the current process name, type, and context, as defined in util.
77 void debug_init(void);
83 /* Amanda implements a rudimentary method of distributing log information to
84 * arbitrary consumers. Some consumers are available here, and other modules
85 * (e.g., server-src/logfile.c) may implement them, too.
87 * If amanda_log_handler has never been called, then the default disposition
88 * depends on the application context: amanda_log_stderr is always used, and
89 * amanda_log_syslog is used in the 'daemon' context. The 'scriptutil' context
90 * does not do any debug logging.
93 /* prototype for log-handling functions; these will be called with only a single
94 * bit set in the log_level. */
95 typedef void (amanda_log_handler_t)(GLogLevelFlags log_level, const gchar *message);
97 /* add an amanda_log_handler_t to the list of handlers */
98 void add_amanda_log_handler(amanda_log_handler_t *hdlr);
100 /* log ERROR, CRITICAL, and WARNING messages to syslog */
101 void amanda_log_syslog(GLogLevelFlags log_level, const gchar *message);
103 /* log ERROR and CRITICAL to stderr */
104 void amanda_log_stderr(GLogLevelFlags log_level, const gchar *message);
107 void amanda_log_null(GLogLevelFlags log_level, const gchar *message);
110 * FATAL ERROR HANDLING
113 /* for compatibility; these should eventually be substituted throughout
114 * the codebase. Extra calls to exit() and abort() should be optimized
115 * away, and are there only for stupid compilers. */
116 #define errordump(...) do { g_error(__VA_ARGS__); abort(); } while (0)
117 #define error(...) do { g_critical(__VA_ARGS__); exit(error_exit_status); } while (0)
119 /* The process exit status that will be given when error()
120 * or errordump() is called.
122 extern int error_exit_status;
129 #define dbopen(a) debug_open(a)
130 #define dbreopen(a,b) debug_reopen(a,b)
131 #define dbrename(a,b) debug_rename(a,b)
132 #define dbclose() debug_close()
133 #define dbprintf debug_printf
134 #define dbfd() debug_fd()
135 #define dbfp() debug_fp()
136 #define dbfn() debug_fn()
138 /* constants for db(re)open */
139 #define DBG_SUBDIR_SERVER "server"
140 #define DBG_SUBDIR_CLIENT "client"
141 #define DBG_SUBDIR_AMANDAD "amandad"
143 /* Open the debugging log in the given subdirectory. Once
144 * this function is called, debug logging is available.
146 * The debugging file is created in the given subdirectory of the
147 * amanda debugging directory, with a filename based on the current
148 * process name (from get_pname).
150 * @param subdir: subdirectory in which to create the debug file.
151 * This is usually one of the DBG_SUBDIR_* constants.
153 void debug_open(char *subdir);
155 /* Re-open a previously debug_close()d debug file, given by
156 * filename, optionally adding a notation as to why it was
159 * @param file: the filename of the debug file to reopen
160 * @param notation: reason for re-opening the file
162 void debug_reopen(char *file, char *notation);
164 /* Rename the debugging logfile into a configuration-specific subdirectory
165 * of SUBDIR. Any existing content of the file will be preserved.
167 * @param config: configuration name
168 * @param subdir: subdirectory in which to create the debug file.
170 void debug_rename(char *config, char *subdir);
172 /* Flush and close the debugging logfile. Call this function at application
175 void debug_close(void);
177 /* Add a message to the debugging logfile. A newline is not automatically
180 * This function is deprecated in favor of glib's g_debug().
182 void debug_printf(const char *format, ...) G_GNUC_PRINTF(1,2);
184 /* Get the file descriptor for the debug file
186 * @returns: the file descriptor
190 /* Get the stdio file handle for the debug file.
192 * @returns: the file handle
194 FILE * debug_fp(void);
196 /* Get the pathname of the debug file.
198 * The result should not be freed by the caller.
200 * @returns: the pathname
202 char * debug_fn(void);
204 /* Use 'dup2' to send stderr output to the debug file. This is useful
205 * when launching other applications, where the stderr of those applications
206 * may be necessary for debugging. It should be called in the child, after
209 void debug_dup_stderr_to_debug(void);
211 /* error() and critical() will print a C stack trace if possible. Set this to
212 * TRUE to avoid this stack trace. This is used by perl wrappers, for example */
213 void suppress_error_traceback(void);
226 /* Like the standard assert(), but call g_error() to log the result properly */
227 #define assert(exp) do { \
229 g_error(_("assert: %s is false: file %s, line %d"), \
230 stringize(exp), __FILE__, __LINE__); \
231 g_assert_not_reached(); \
235 #else /* ASSERTIONS */
237 #define assert(exp) ((void)0)
239 #endif /* ASSERTIONS */
242 #endif /* AMANDA_DEBUG_H */