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3 | luk | 1 | |
2 | /// inotify C++ interface implementation |
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3 | /** |
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4 | * \file inotify-cxx.cpp |
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5 | * |
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6 | * inotify C++ interface |
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7 | * |
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8 | * Copyright (C) 2006 Lukas Jelinek <lukas@aiken.cz> |
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9 | * |
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10 | * This program is free software; you can redistribute it and/or |
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11 | * modify it under the terms of one of the following licenses: |
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12 | * |
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13 | * \li 1. X11-style license (see LICENSE-X11) |
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14 | * \li 2. GNU Lesser General Public License, version 2.1 (see LICENSE-LGPL) |
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15 | * \li 3. GNU General Public License, version 2 (see LICENSE-GPL) |
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16 | * |
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17 | * If you want to help with choosing the best license for you, |
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18 | * please visit http://www.gnu.org/licenses/license-list.html. |
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19 | * |
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20 | */ |
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21 | |||
22 | |||
23 | #include <errno.h> |
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24 | #include <unistd.h> |
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25 | |||
26 | #include "inotify-cxx.h" |
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27 | |||
28 | #define DUMP_SEP \ |
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29 | ({ \ |
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30 | if (!rStr.empty()) { \ |
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31 | rStr.append(" "); \ |
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32 | } \ |
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33 | }) |
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34 | |||
35 | |||
36 | void InotifyEvent::DumpTypes(std::string& rStr) const |
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37 | { |
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38 | rStr = ""; |
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39 | |||
40 | if (IsType(IN_ACCESS)) { |
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41 | rStr.append("IN_ACCESS"); |
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42 | } |
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43 | if (IsType(IN_MODIFY)) { |
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44 | DUMP_SEP; |
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45 | rStr.append("IN_MODIFY"); |
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46 | } |
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47 | if (IsType(IN_ATTRIB)) { |
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48 | DUMP_SEP; |
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49 | rStr.append("IN_ATTRIB"); |
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50 | } |
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51 | if (IsType(IN_CLOSE_WRITE)) { |
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52 | DUMP_SEP; |
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53 | rStr.append("IN_CLOSE_WRITE"); |
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54 | } |
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55 | if (IsType(IN_CLOSE_NOWRITE)) { |
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56 | DUMP_SEP; |
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57 | rStr.append("IN_CLOSE_NOWRITE"); |
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58 | } |
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59 | if (IsType(IN_OPEN)) { |
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60 | DUMP_SEP; |
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61 | rStr.append("IN_OPEN"); |
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62 | } |
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63 | if (IsType(IN_MOVED_FROM)) { |
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64 | DUMP_SEP; |
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65 | rStr.append("IN_MOVED_FROM"); |
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66 | } |
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67 | if (IsType(IN_MOVED_TO)) { |
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68 | DUMP_SEP; |
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69 | rStr.append("IN_MOVED_TO"); |
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70 | } |
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71 | if (IsType(IN_CREATE)) { |
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72 | DUMP_SEP; |
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73 | rStr.append("IN_CREATE"); |
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74 | } |
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75 | if (IsType(IN_DELETE)) { |
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76 | DUMP_SEP; |
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77 | rStr.append("IN_DELETE"); |
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78 | } |
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79 | if (IsType(IN_DELETE_SELF)) { |
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80 | DUMP_SEP; |
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81 | rStr.append("IN_DELETE_SELF"); |
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82 | } |
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83 | if (IsType(IN_UNMOUNT)) { |
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84 | DUMP_SEP; |
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85 | rStr.append("IN_UNMOUNT"); |
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86 | } |
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87 | if (IsType(IN_Q_OVERFLOW)) { |
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88 | DUMP_SEP; |
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89 | rStr.append("IN_Q_OVERFLOW"); |
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90 | } |
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91 | if (IsType(IN_IGNORED)) { |
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92 | DUMP_SEP; |
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93 | rStr.append("IN_IGNORED"); |
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94 | } |
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95 | if (IsType(IN_CLOSE)) { |
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96 | DUMP_SEP; |
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97 | rStr.append("IN_CLOSE"); |
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98 | } |
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99 | if (IsType(IN_MOVE)) { |
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100 | DUMP_SEP; |
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101 | rStr.append("IN_MOVE"); |
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102 | } |
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103 | if (IsType(IN_ISDIR)) { |
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104 | DUMP_SEP; |
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105 | rStr.append("IN_ISDIR"); |
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106 | } |
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107 | if (IsType(IN_ONESHOT)) { |
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108 | DUMP_SEP; |
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109 | rStr.append("IN_ONESHOT"); |
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110 | } |
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111 | } |
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112 | |||
113 | |||
114 | Inotify::Inotify() |
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115 | { |
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116 | m_fd = inotify_init(); |
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117 | } |
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118 | |||
119 | Inotify::~Inotify() |
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120 | { |
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121 | Close(); |
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122 | } |
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123 | |||
124 | void Inotify::Close() |
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125 | { |
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126 | if (m_fd != -1) { |
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127 | RemoveAll(); |
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128 | close(m_fd); |
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129 | m_fd = -1; |
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130 | } |
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131 | } |
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132 | |||
133 | bool Inotify::Add(InotifyWatch* pWatch) |
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134 | { |
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135 | if (m_fd == -1) |
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136 | return false; |
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137 | |||
138 | pWatch->m_wd = inotify_add_watch(m_fd, pWatch->GetPath().c_str(), pWatch->GetMask()); |
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139 | if (pWatch->m_wd != -1) { |
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140 | m_watches.insert(IN_WATCH_MAP::value_type(pWatch->m_wd, pWatch)); |
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141 | return true; |
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142 | } |
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143 | |||
144 | return false; |
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145 | } |
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146 | |||
147 | void Inotify::Remove(InotifyWatch* pWatch) |
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148 | { |
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149 | if (m_fd == -1) |
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150 | return; |
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151 | |||
152 | if (inotify_rm_watch(m_fd, pWatch->GetMask()) != -1) { |
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153 | m_watches.erase(pWatch->m_wd); |
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154 | pWatch->m_wd = -1; |
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155 | } |
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156 | } |
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157 | |||
158 | void Inotify::RemoveAll() |
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159 | { |
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160 | IN_WATCH_MAP::iterator it = m_watches.begin(); |
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161 | while (it != m_watches.end()) { |
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162 | inotify_rm_watch(m_fd, (*it).second->GetMask()); |
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163 | it++; |
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164 | } |
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165 | |||
166 | m_watches.clear(); |
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167 | } |
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168 | |||
169 | bool Inotify::WaitForEvents(bool fNoIntr) |
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170 | { |
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171 | ssize_t len = 0; |
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172 | |||
173 | do { |
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174 | len = read(m_fd, m_buf, INOTIFY_BUFLEN); |
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175 | } while (fNoIntr && len == -1 && errno == EINTR); |
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176 | |||
177 | if (len <= 0) { |
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178 | return false; |
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179 | } |
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180 | |||
181 | ssize_t i = 0; |
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182 | while (i < len) { |
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183 | InotifyEvent evt((struct inotify_event *) &m_buf[i]); |
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184 | m_events.push_back(evt); |
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185 | i += INOTIFY_EVENT_SIZE + (int) evt.GetLength(); |
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186 | } |
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187 | |||
188 | return true; |
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189 | } |
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190 | |||
191 | int Inotify::GetEventCount() |
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192 | { |
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193 | return m_events.size(); |
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194 | } |
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195 | |||
196 | bool Inotify::GetEvent(InotifyEvent* pEvt) |
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197 | { |
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198 | bool b = PeekEvent(pEvt); |
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199 | if (b) |
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200 | m_events.pop_front(); |
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201 | return b; |
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202 | } |
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203 | |||
204 | bool Inotify::PeekEvent(InotifyEvent* pEvt) |
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205 | { |
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206 | if (pEvt == NULL || m_events.empty()) |
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207 | return false; |
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208 | |||
209 | *pEvt = m_events.front(); |
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210 | |||
211 | return true; |
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212 | } |
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213 | |||
214 | InotifyWatch* Inotify::FindWatch(int iDescriptor) |
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215 | { |
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216 | IN_WATCH_MAP::iterator it = m_watches.find(iDescriptor); |
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217 | if (it == m_watches.end()) |
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218 | return NULL; |
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219 | |||
220 | return (*it).second; |
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221 | } |
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222 |