1 files changed, 143 insertions, 0 deletions
diff --git a/logging.h b/logging.h
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+++ b/logging.h
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+/*
+  chronyd/chronyc - Programs for keeping computer clocks accurate.
+
+ **********************************************************************
+ * Copyright (C) Richard P. Curnow  1997-2002
+ * Copyright (C) Miroslav Lichvar  2013-2015
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * 
+ **********************************************************************
+
+  =======================================================================
+
+  Header file for diagnostic logging module
+
+  */
+
+#ifndef GOT_LOGGING_H
+#define GOT_LOGGING_H
+
+#include "sysincl.h"
+
+/* Line logging macros.  If the compiler is GNU C, we take advantage of
+   being able to get the function name also. */
+
+#ifdef __GNUC__
+#define FUNCTION_NAME __FUNCTION__
+#define FORMAT_ATTRIBUTE_PRINTF(str, first) __attribute__ ((format (printf, str, first)))
+#else
+#define FUNCTION_NAME ""
+#define FORMAT_ATTRIBUTE_PRINTF(str, first)
+#endif
+
+#if DEBUG > 0
+#define LOG_MESSAGE(severity, ...) \
+  LOG_Message(severity, __LINE__, __FILE__, FUNCTION_NAME, __VA_ARGS__)
+#else
+#define LOG_MESSAGE(severity, ...) \
+  LOG_Message(severity, __VA_ARGS__)
+#endif
+
+#define DEBUG_LOG(...) \
+  do { \
+    if (DEBUG && log_min_severity == LOGS_DEBUG) \
+      LOG_MESSAGE(LOGS_DEBUG, __VA_ARGS__); \
+  } while (0)
+
+#define LOG_FATAL(...) \
+  do { \
+    LOG_MESSAGE(LOGS_FATAL, __VA_ARGS__); \
+    exit(1); \
+  } while (0)
+
+#define LOG(severity, ...) LOG_MESSAGE(severity, __VA_ARGS__)
+
+/* Definition of severity */
+typedef enum {
+  LOGS_DEBUG = -1,
+  LOGS_INFO = 0,
+  LOGS_WARN,
+  LOGS_ERR,
+  LOGS_FATAL,
+} LOG_Severity;
+
+/* Minimum severity of messages to be logged */
+extern LOG_Severity log_min_severity;
+
+/* Init function */
+extern void LOG_Initialise(void);
+
+/* Fini function */
+extern void LOG_Finalise(void);
+
+/* Line logging function */
+#if DEBUG > 0
+FORMAT_ATTRIBUTE_PRINTF(5, 6)
+extern void LOG_Message(LOG_Severity severity, int line_number, const char *filename,
+                        const char *function_name, const char *format, ...);
+#else
+FORMAT_ATTRIBUTE_PRINTF(2, 3)
+extern void LOG_Message(LOG_Severity severity, const char *format, ...);
+#endif
+
+/* Set the minimum severity of a message to be logged or printed to terminal.
+   If the severity is LOGS_DEBUG and DEBUG is enabled, all messages will be
+   prefixed with the filename, line number, and function name. */
+extern void LOG_SetMinSeverity(LOG_Severity severity);
+
+/* Get the minimum severity */
+extern LOG_Severity LOG_GetMinSeverity(void);
+
+/* Flags for info messages that should be logged only in specific contexts */
+typedef enum {
+  LOGC_Command = 1,
+  LOGC_SourceFile = 2,
+} LOG_Context;
+
+/* Modify current contexts */
+extern void LOG_SetContext(LOG_Context context);
+extern void LOG_UnsetContext(LOG_Context context);
+
+/* Get severity depending on the current active contexts: INFO if they contain
+   at least one of the specified contexts, DEBUG otherwise */
+extern LOG_Severity LOG_GetContextSeverity(LOG_Context contexts);
+
+/* Set a prefix for debug messages */
+extern void LOG_SetDebugPrefix(const char *prefix);
+
+/* Log messages to a file instead of stderr, or stderr again if NULL */
+extern void LOG_OpenFileLog(const char *log_file);
+
+/* Log messages to syslog instead of stderr */
+extern void LOG_OpenSystemLog(void);
+
+/* Stop using stderr and send fatal message to the foreground process */
+extern void LOG_SetParentFd(int fd);
+
+/* Close the pipe to the foreground process so it can exit */
+extern void LOG_CloseParentFd(void);
+
+/* File logging functions */
+
+typedef int LOG_FileID;
+
+extern LOG_FileID LOG_FileOpen(const char *name, const char *banner);
+
+FORMAT_ATTRIBUTE_PRINTF(2, 3)
+extern void LOG_FileWrite(LOG_FileID id, const char *format, ...);
+
+extern void LOG_CycleLogFiles(void);
+
+#endif /* GOT_LOGGING_H */