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1 | office | 1 | /** |
2 | * @file BInputProcess.c |
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3 | * @author Ambroz Bizjak <ambrop7@gmail.com> |
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4 | * |
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5 | * @section LICENSE |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions are met: |
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9 | * 1. Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * 3. Neither the name of the author nor the |
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15 | * names of its contributors may be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
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19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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21 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |||
30 | #include <unistd.h> |
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31 | |||
32 | #include <base/BLog.h> |
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33 | #include <system/BNetwork.h> |
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34 | |||
35 | #include "BInputProcess.h" |
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36 | |||
37 | #include <generated/blog_channel_BInputProcess.h> |
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38 | |||
39 | static void connection_handler (BInputProcess *o, int event); |
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40 | static void process_handler (BInputProcess *o, int normally, uint8_t normally_exit_status); |
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41 | |||
42 | void connection_handler (BInputProcess *o, int event) |
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43 | { |
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44 | DebugObject_Access(&o->d_obj); |
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45 | ASSERT(o->pipe_fd >= 0) |
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46 | |||
47 | if (event == BCONNECTION_EVENT_RECVCLOSED) { |
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48 | BLog(BLOG_INFO, "pipe closed"); |
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49 | } else { |
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50 | BLog(BLOG_ERROR, "pipe error"); |
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51 | } |
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52 | |||
53 | // free pipe connection read interface |
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54 | BConnection_RecvAsync_Free(&o->pipe_con); |
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55 | |||
56 | // free pipe connection |
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57 | BConnection_Free(&o->pipe_con); |
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58 | |||
59 | // close pipe read end |
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60 | ASSERT_FORCE(close(o->pipe_fd) == 0) |
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61 | |||
62 | // forget pipe |
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63 | o->pipe_fd = -1; |
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64 | |||
65 | // call closed handler |
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66 | o->handler_closed(o->user, (event != BCONNECTION_EVENT_RECVCLOSED)); |
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67 | return; |
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68 | } |
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69 | |||
70 | void process_handler (BInputProcess *o, int normally, uint8_t normally_exit_status) |
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71 | { |
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72 | DebugObject_Access(&o->d_obj); |
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73 | ASSERT(o->started) |
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74 | ASSERT(o->have_process) |
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75 | |||
76 | // free process |
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77 | BProcess_Free(&o->process); |
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78 | |||
79 | // set not have process |
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80 | o->have_process = 0; |
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81 | |||
82 | // call terminated handler |
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83 | o->handler_terminated(o->user, normally, normally_exit_status); |
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84 | return; |
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85 | } |
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86 | |||
87 | int BInputProcess_Init (BInputProcess *o, BReactor *reactor, BProcessManager *manager, void *user, |
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88 | BInputProcess_handler_terminated handler_terminated, |
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89 | BInputProcess_handler_closed handler_closed) |
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90 | { |
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91 | BNetwork_Assert(); |
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92 | |||
93 | // init arguments |
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94 | o->reactor = reactor; |
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95 | o->manager = manager; |
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96 | o->user = user; |
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97 | o->handler_terminated = handler_terminated; |
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98 | o->handler_closed = handler_closed; |
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99 | |||
100 | // create pipe |
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101 | int pipefds[2]; |
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102 | if (pipe(pipefds) < 0) { |
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103 | BLog(BLOG_ERROR, "pipe failed"); |
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104 | goto fail0; |
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105 | } |
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106 | |||
107 | // init pipe connection |
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108 | if (!BConnection_Init(&o->pipe_con, BConnection_source_pipe(pipefds[0], 0), o->reactor, o, (BConnection_handler)connection_handler)) { |
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109 | BLog(BLOG_ERROR, "BConnection_Init failed"); |
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110 | goto fail1; |
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111 | } |
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112 | |||
113 | // init pipe connection read interface |
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114 | BConnection_RecvAsync_Init(&o->pipe_con); |
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115 | |||
116 | // remember pipe fds |
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117 | o->pipe_fd = pipefds[0]; |
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118 | o->pipe_write_fd = pipefds[1]; |
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119 | |||
120 | // set not started |
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121 | o->started = 0; |
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122 | |||
123 | DebugObject_Init(&o->d_obj); |
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124 | return 1; |
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125 | |||
126 | fail1: |
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127 | ASSERT_FORCE(close(pipefds[0]) == 0) |
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128 | ASSERT_FORCE(close(pipefds[1]) == 0) |
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129 | fail0: |
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130 | return 0; |
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131 | } |
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132 | |||
133 | void BInputProcess_Free (BInputProcess *o) |
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134 | { |
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135 | DebugObject_Free(&o->d_obj); |
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136 | |||
137 | if (!o->started) { |
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138 | // close pipe write end |
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139 | ASSERT_FORCE(close(o->pipe_write_fd) == 0) |
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140 | } else { |
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141 | // free process |
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142 | if (o->have_process) { |
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143 | BProcess_Free(&o->process); |
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144 | } |
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145 | } |
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146 | |||
147 | if (o->pipe_fd >= 0) { |
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148 | // free pipe connection read interface |
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149 | BConnection_RecvAsync_Free(&o->pipe_con); |
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150 | |||
151 | // free pipe connection |
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152 | BConnection_Free(&o->pipe_con); |
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153 | |||
154 | // close pipe read end |
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155 | ASSERT_FORCE(close(o->pipe_fd) == 0) |
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156 | } |
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157 | } |
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158 | |||
159 | int BInputProcess_Start (BInputProcess *o, const char *file, char *const argv[], const char *username) |
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160 | { |
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161 | DebugObject_Access(&o->d_obj); |
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162 | ASSERT(!o->started) |
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163 | |||
164 | // start process |
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165 | int fds[] = { o->pipe_write_fd, -1 }; |
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166 | int fds_map[] = { 1 }; |
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167 | if (!BProcess_InitWithFds(&o->process, o->manager, (BProcess_handler)process_handler, o, file, argv, username, fds, fds_map)) { |
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168 | BLog(BLOG_ERROR, "BProcess_Init failed"); |
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169 | goto fail0; |
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170 | } |
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171 | |||
172 | // close pipe write end |
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173 | ASSERT_FORCE(close(o->pipe_write_fd) == 0) |
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174 | |||
175 | // set started |
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176 | o->started = 1; |
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177 | |||
178 | // set have process |
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179 | o->have_process = 1; |
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180 | |||
181 | return 1; |
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182 | |||
183 | fail0: |
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184 | return 0; |
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185 | } |
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186 | |||
187 | int BInputProcess_Terminate (BInputProcess *o) |
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188 | { |
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189 | DebugObject_Access(&o->d_obj); |
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190 | ASSERT(o->started) |
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191 | ASSERT(o->have_process) |
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192 | |||
193 | return BProcess_Terminate(&o->process); |
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194 | } |
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195 | |||
196 | int BInputProcess_Kill (BInputProcess *o) |
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197 | { |
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198 | DebugObject_Access(&o->d_obj); |
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199 | ASSERT(o->started) |
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200 | ASSERT(o->have_process) |
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201 | |||
202 | return BProcess_Kill(&o->process); |
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203 | } |
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204 | |||
205 | StreamRecvInterface * BInputProcess_GetInput (BInputProcess *o) |
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206 | { |
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207 | DebugObject_Access(&o->d_obj); |
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208 | ASSERT(o->pipe_fd >= 0) |
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209 | |||
210 | return BConnection_RecvAsync_GetIf(&o->pipe_con); |
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211 | } |