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1/**
2 * @file llerrorbuffer.h
3 * @brief Buffer implementation for logging.
4 *
5 * Copyright (c) 2002-2007, Linden Research, Inc.
6 *
7 * The source code in this file ("Source Code") is provided by Linden Lab
8 * to you under the terms of the GNU General Public License, version 2.0
9 * ("GPL"), unless you have obtained a separate licensing agreement
10 * ("Other License"), formally executed by you and Linden Lab. Terms of
11 * the GPL can be found in doc/GPL-license.txt in this distribution, or
12 * online at http://secondlife.com/developers/opensource/gplv2
13 *
14 * There are special exceptions to the terms and conditions of the GPL as
15 * it is applied to this Source Code. View the full text of the exception
16 * in the file doc/FLOSS-exception.txt in this software distribution, or
17 * online at http://secondlife.com/developers/opensource/flossexception
18 *
19 * By copying, modifying or distributing this software, you acknowledge
20 * that you have read and understood your obligations described above,
21 * and agree to abide by those obligations.
22 *
23 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
24 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
25 * COMPLETENESS OR PERFORMANCE.
26 */
27
28#ifndef LL_LLERRORBUFFER_H
29#define LL_LLERRORBUFFER_H
30
31#include <fstream>
32#include <iostream>
33#include <string>
34
35#include "lldefs.h"
36#include "stdtypes.h"
37#include "llfile.h"
38
39// A streambuf that sends it's output into a file, stderr, or syslog.
40//
41// Each output can be enabled/disabled, and a priority can be set.
42
43class LLFixedBuffer;
44
45class LLErrorBuffer : public std::streambuf
46{
47 public:
48
49 // Specify error levels
50 enum ELevel
51 {
52 DEBUG = 0,
53 INFO = 1,
54 WARN = 2,
55 FATAL = 3,
56 NONE = 4 // Do NO error logging (for use in signal handlers)
57 };
58
59 LLErrorBuffer();
60 ~LLErrorBuffer();
61 BOOL setFile(const char *filename);
62 void closeFile();
63 const char *getFilename() const;
64 void setFixedBuffer(LLFixedBuffer *b) { mFixedBuf = b; };
65
66 // Sets the priority of the current message
67 void setPriority(const ELevel l) { mPriority = l; }
68
69 // Only display messages >= to this level
70 void setLevel(const ELevel l) { mLevel = l; }
71 ELevel getLevel() { return mLevel; }
72 // Display messages >= to level l, if l < current level
73 ELevel mergeLevel(const ELevel l);
74
75 // on linux, this sets syslog info to be a LOG_NOTICE which will
76 // be centrally logged. *NOTE: This is very
77 // linux/syslog/configuration dependent.
78 void setElevatedRemote(BOOL b) { mElevatedRemote = b; }
79
80 // logs are in utc rather than local
81 void setUTCTimestamp(BOOL utc);
82
83 // Turn on or off logging outputs
84 void enableError(BOOL active);
85 void enableErrorTimestamp(BOOL active);
86 void enableFile(BOOL active);
87 void enableSyslog(BOOL active);
88#if LL_WINDOWS
89 void enableWinDebug(BOOL active);
90#endif // LL_WINDOWS
91
92 protected:
93 int overflow(int c = EOF);
94
95 private:
96 char mFilename[LL_MAX_PATH]; /* Flawfinder: ignore */
97 int ELevelToSyslogPriority(const ELevel l);
98
99 llofstream *mFile;
100 std::string mBuf;
101 LLFixedBuffer *mFixedBuf;
102
103 BOOL mErrorActive;
104 BOOL mErrorTimestamp;
105 BOOL mFileActive;
106 BOOL mSyslogActive;
107 BOOL mWinDebugActive;
108 BOOL mElevatedRemote;
109 BOOL mIsUTC;
110
111 // If priority < level, output is thrown away
112 ELevel mLevel;
113 // Current message priority
114 ELevel mPriority;
115};
116
117#endif // LL_LLERRORBUFFER_H