Wed, 05 Jun 2024 19:50:44 +0200
add extra nullptr check in the event loop to handle the case when the finish ptr is set to NULL after it was already scheduled
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1 | /* |
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2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. |
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3 | * |
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4 | * Copyright 2016 Olaf Wintermann. All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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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 | * |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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20 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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26 | * POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #ifndef CGI_H |
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30 | #define CGI_H |
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31 | |
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32 | #include "../public/nsapi.h" |
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33 | #include <cx/buffer.h> |
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34 | |
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35 | #ifdef __cplusplus |
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36 | extern "C" { |
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37 | #endif |
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38 | |
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39 | enum CgiIOResult { |
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40 | CGI_IO_COMPLETE = 0, |
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41 | CGI_IO_NEED_READ, |
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42 | CGI_IO_NEED_WRITE, |
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43 | CGI_IO_ERROR |
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44 | }; |
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45 | |
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46 | typedef enum CgiIOResult CgiIOResult; |
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47 | |
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48 | typedef struct { |
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49 | int in[2]; |
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50 | int out[2]; |
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51 | int err[2]; |
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52 | pid_t pid; |
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53 | } CGIProcess; |
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54 | |
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55 | typedef struct { |
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56 | Session *sn; |
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57 | Request *rq; |
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58 | CxBuffer tmp; |
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59 | int status; |
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60 | char *msg; |
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61 | size_t response_length; |
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62 | WSBool cgiheader; |
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63 | } CGIResponseParser; |
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64 | |
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65 | typedef struct CGIHandler { |
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66 | CGIProcess process; |
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67 | CGIResponseParser *parser; |
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68 | HttpResponseWriter *response; |
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69 | |
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70 | /* |
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71 | * request path (rq->vars path) |
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72 | */ |
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73 | char *path; |
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74 | |
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75 | /* |
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76 | * event object for pollin |
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77 | * active by default and my be deactivated/reactivated in some cases |
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78 | */ |
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79 | Event *readev; |
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80 | |
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81 | /* |
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82 | * event object prepared for pollout |
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83 | * only activated if write returns EWOULDBLOCK |
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84 | */ |
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85 | Event *writeev; |
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86 | |
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87 | /* |
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88 | * temp buffer used for parsing stderr lines |
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89 | */ |
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90 | char *stderr_tmp; |
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91 | /* |
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92 | * current length of stderr_tmp |
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93 | */ |
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94 | int stderr_tmplen; |
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95 | |
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96 | /* |
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97 | * allocation size of stderr_tmp |
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98 | */ |
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99 | int stderr_tmpalloc; |
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100 | |
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101 | /* |
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102 | * output buffer |
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103 | */ |
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104 | char *writebuf; |
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105 | |
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106 | /* |
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107 | * writebuf allocation size |
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108 | */ |
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109 | size_t writebuf_alloc; |
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110 | |
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111 | /* |
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112 | * currently used size of writebuf |
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113 | */ |
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114 | size_t writebuf_size; |
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115 | |
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116 | /* |
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117 | * current writebuf pos (writebuf_size - write_buf_pos = remaining) |
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118 | */ |
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119 | size_t writebuf_pos; |
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120 | |
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121 | /* |
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122 | * number of bytes of the response body sent to the client |
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123 | * at the end count_write should have the same value as parser->response_length |
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124 | */ |
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125 | size_t count_write; |
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126 | |
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127 | /* |
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128 | * poll_out event active |
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129 | */ |
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130 | WSBool poll_out; |
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131 | |
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132 | /* |
502
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133 | * last read returned EWOULDBLOCK |
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134 | * waiting for the next read event |
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135 | */ |
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136 | WSBool wait_read; |
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137 | |
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138 | /* |
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139 | * cgi pipe (stdout) EOF |
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140 | */ |
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141 | WSBool cgi_eof; |
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142 | |
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143 | /* |
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144 | * Last kill signal sent to the cgi process |
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145 | */ |
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146 | int cgi_kill; |
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147 | |
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148 | WSBool debug_finished; |
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149 | |
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150 | /* |
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151 | * number of currently open events (stdout, stderr, [stdout]) |
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152 | */ |
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153 | int events; |
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154 | |
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155 | /* |
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156 | * error indicator |
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157 | */ |
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158 | int result; |
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159 | } CGIHandler; |
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160 | |
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161 | int send_cgi(pblock *pb, Session *sn, Request *rq); |
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162 | |
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163 | char** cgi_add_vars(char **env, Session *sn, Request *rq); |
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164 | |
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165 | int cgi_start(CGIProcess *p, char *path, char *const argv[], char *const envp[]); |
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166 | |
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167 | int cgi_close(CGIProcess *p); |
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168 | |
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169 | int cgi_stdout_readevent(EventHandler *ev, Event *event); |
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170 | int cgi_stderr_readevent(EventHandler *ev, Event *event); |
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171 | int cgi_event_finish(EventHandler *ev, Event *event); |
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172 | int cgi_writeevent(EventHandler *ev, Event *event); |
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173 | |
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174 | CgiIOResult cgi_read_output(CGIHandler *handler, EventHandler *ev, const char *debug_log); |
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175 | |
118
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176 | CGIResponseParser* cgi_parser_new(Session *sn, Request *rq); |
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177 | void cgi_parser_free(CGIResponseParser *parser); |
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178 | int cgi_parse_response(CGIResponseParser *parser, char *buf, size_t len, size_t *bpos); |
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179 | |
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180 | #ifdef __cplusplus |
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181 | } |
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182 | #endif |
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183 | |
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184 | #endif /* CGI_H */ |
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185 |