1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | ***************************************************************************/
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22 | #include "tool_setup.h"
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23 |
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24 | #include <sys/stat.h>
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25 |
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26 | #ifdef HAVE_SIGNAL_H
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27 | #include <signal.h>
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28 | #endif
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29 |
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30 | #ifdef USE_NSS
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31 | #include <nspr.h>
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32 | #include <plarenas.h>
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33 | #endif
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34 |
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35 | #define ENABLE_CURLX_PRINTF
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36 | /* use our own printf() functions */
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37 | #include "curlx.h"
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38 |
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39 | #include "tool_cfgable.h"
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40 | #include "tool_convert.h"
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41 | #include "tool_msgs.h"
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42 | #include "tool_operate.h"
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43 | #include "tool_panykey.h"
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44 | #include "tool_vms.h"
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45 | #include "tool_main.h"
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46 | #include "tool_libinfo.h"
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47 |
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48 | /*
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49 | * This is low-level hard-hacking memory leak tracking and similar. Using
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50 | * the library level code from this client-side is ugly, but we do this
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51 | * anyway for convenience.
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52 | */
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53 | #include "memdebug.h" /* keep this as LAST include */
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54 |
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55 | #ifdef __VMS
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56 | /*
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57 | * vms_show is a global variable, used in main() as parameter for
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58 | * function vms_special_exit() to allow proper curl tool exiting.
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59 | * Its value may be set in other tool_*.c source files thanks to
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60 | * forward declaration present in tool_vms.h
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61 | */
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62 | int vms_show = 0;
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63 | #endif
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64 |
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65 | #ifdef __MINGW32__
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66 | /*
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67 | * There seems to be no way to escape "*" in command-line arguments with MinGW
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68 | * when command-line argument globbing is enabled under the MSYS shell, so turn
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69 | * it off.
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70 | */
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71 | int _CRT_glob = 0;
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72 | #endif /* __MINGW32__ */
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73 |
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74 | /* if we build a static library for unit tests, there is no main() function */
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75 | #ifndef UNITTESTS
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76 |
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77 | /*
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78 | * Ensure that file descriptors 0, 1 and 2 (stdin, stdout, stderr) are
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79 | * open before starting to run. Otherwise, the first three network
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80 | * sockets opened by curl could be used for input sources, downloaded data
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81 | * or error logs as they will effectively be stdin, stdout and/or stderr.
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82 | */
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83 | static void main_checkfds(void)
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84 | {
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85 | #ifdef HAVE_PIPE
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86 | int fd[2] = { STDIN_FILENO, STDIN_FILENO };
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87 | while(fd[0] == STDIN_FILENO ||
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88 | fd[0] == STDOUT_FILENO ||
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89 | fd[0] == STDERR_FILENO ||
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90 | fd[1] == STDIN_FILENO ||
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91 | fd[1] == STDOUT_FILENO ||
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92 | fd[1] == STDERR_FILENO)
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93 | if(pipe(fd) < 0)
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94 | return; /* Out of handles. This isn't really a big problem now, but
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95 | will be when we try to create a socket later. */
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96 | close(fd[0]);
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97 | close(fd[1]);
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98 | #endif
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99 | }
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100 |
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101 | #ifdef CURLDEBUG
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102 | static void memory_tracking_init(void)
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103 | {
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104 | char *env;
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105 | /* if CURL_MEMDEBUG is set, this starts memory tracking message logging */
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106 | env = curlx_getenv("CURL_MEMDEBUG");
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107 | if(env) {
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108 | /* use the value as file name */
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109 | char fname[CURL_MT_LOGFNAME_BUFSIZE];
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110 | if(strlen(env) >= CURL_MT_LOGFNAME_BUFSIZE)
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111 | env[CURL_MT_LOGFNAME_BUFSIZE-1] = '\0';
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112 | strcpy(fname, env);
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113 | curl_free(env);
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114 | curl_memdebug(fname);
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115 | /* this weird stuff here is to make curl_free() get called
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116 | before curl_memdebug() as otherwise memory tracking will
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117 | log a free() without an alloc! */
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118 | }
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119 | /* if CURL_MEMLIMIT is set, this enables fail-on-alloc-number-N feature */
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120 | env = curlx_getenv("CURL_MEMLIMIT");
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121 | if(env) {
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122 | char *endptr;
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123 | long num = strtol(env, &endptr, 10);
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124 | if((endptr != env) && (endptr == env + strlen(env)) && (num > 0))
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125 | curl_memlimit(num);
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126 | curl_free(env);
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127 | }
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128 | }
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129 | #else
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130 | # define memory_tracking_init() Curl_nop_stmt
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131 | #endif
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132 |
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133 | /*
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134 | * This is the main global constructor for the app. Call this before
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135 | * _any_ libcurl usage. If this fails, *NO* libcurl functions may be
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136 | * used, or havoc may be the result.
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137 | */
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138 | static CURLcode main_init(struct GlobalConfig *config)
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139 | {
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140 | CURLcode result = CURLE_OK;
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141 |
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142 | #if defined(__DJGPP__) || defined(__GO32__)
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143 | /* stop stat() wasting time */
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144 | _djstat_flags |= _STAT_INODE | _STAT_EXEC_MAGIC | _STAT_DIRSIZE;
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145 | #endif
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146 |
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147 | /* Initialise the global config */
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148 | config->showerror = -1; /* Will show errors */
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149 | config->errors = stderr; /* Default errors to stderr */
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150 |
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151 | /* Allocate the initial operate config */
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152 | config->first = config->last = malloc(sizeof(struct OperationConfig));
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153 | if(config->first) {
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154 | /* Perform the libcurl initialization */
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155 | result = curl_global_init(CURL_GLOBAL_DEFAULT);
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156 | if(!result) {
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157 | /* Get information about libcurl */
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158 | result = get_libcurl_info();
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159 |
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160 | if(!result) {
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161 | /* Get a curl handle to use for all forthcoming curl transfers */
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162 | config->easy = curl_easy_init();
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163 | if(config->easy) {
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164 | /* Initialise the config */
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165 | config_init(config->first);
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166 | config->first->easy = config->easy;
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167 | config->first->global = config;
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168 | }
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169 | else {
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170 | helpf(stderr, "error initializing curl easy handle\n");
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171 | result = CURLE_FAILED_INIT;
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172 | free(config->first);
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173 | }
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174 | }
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175 | else {
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176 | helpf(stderr, "error retrieving curl library information\n");
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177 | free(config->first);
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178 | }
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179 | }
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180 | else {
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181 | helpf(stderr, "error initializing curl library\n");
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182 | free(config->first);
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183 | }
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184 | }
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185 | else {
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186 | helpf(stderr, "error initializing curl\n");
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187 | result = CURLE_FAILED_INIT;
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188 | }
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189 |
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190 | return result;
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191 | }
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192 |
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193 | static void free_config_fields(struct GlobalConfig *config)
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194 | {
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195 | Curl_safefree(config->trace_dump);
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196 |
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197 | if(config->errors_fopened && config->errors)
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198 | fclose(config->errors);
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199 | config->errors = NULL;
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200 |
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201 | if(config->trace_fopened && config->trace_stream)
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202 | fclose(config->trace_stream);
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203 | config->trace_stream = NULL;
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204 |
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205 | Curl_safefree(config->libcurl);
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206 | }
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207 |
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208 | /*
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209 | * This is the main global destructor for the app. Call this after
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210 | * _all_ libcurl usage is done.
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211 | */
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212 | static void main_free(struct GlobalConfig *config)
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213 | {
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214 | /* Cleanup the easy handle */
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215 | curl_easy_cleanup(config->easy);
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216 | config->easy = NULL;
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217 |
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218 | /* Main cleanup */
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219 | curl_global_cleanup();
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220 | convert_cleanup();
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221 | metalink_cleanup();
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222 | #ifdef USE_NSS
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223 | if(PR_Initialized()) {
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224 | /* prevent valgrind from reporting still reachable mem from NSRP arenas */
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225 | PL_ArenaFinish();
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226 | /* prevent valgrind from reporting possibly lost memory (fd cache, ...) */
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227 | PR_Cleanup();
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228 | }
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229 | #endif
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230 | free_config_fields(config);
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231 |
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232 | /* Free the config structures */
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233 | config_free(config->last);
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234 | config->first = NULL;
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235 | config->last = NULL;
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236 | }
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237 |
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238 | /*
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239 | ** curl tool main function.
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240 | */
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241 | int curl_main(int argc, char *argv[])
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242 | {
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243 | CURLcode result = CURLE_OK;
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244 | struct GlobalConfig global;
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245 | memset(&global, 0, sizeof(global));
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246 |
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247 | main_checkfds();
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248 |
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249 | #if defined(HAVE_SIGNAL) && defined(SIGPIPE)
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250 | (void)signal(SIGPIPE, SIG_IGN);
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251 | #endif
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252 |
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253 | /* Initialize memory tracking */
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254 | memory_tracking_init();
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255 |
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256 | /* Initialize the curl library - do not call any libcurl functions before
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257 | this point */
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258 | result = main_init(&global);
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259 | if(!result) {
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260 | /* Start our curl operation */
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261 | result = operate(&global, argc, argv);
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262 |
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263 | #ifdef __SYMBIAN32__
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264 | if(global.showerror)
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265 | tool_pressanykey();
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266 | #endif
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267 |
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268 | /* Perform the main cleanup */
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269 | main_free(&global);
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270 | }
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271 |
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272 | #ifdef __NOVELL_LIBC__
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273 | if(getenv("_IN_NETWARE_BASH_") == NULL)
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274 | tool_pressanykey();
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275 | #endif
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276 |
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277 | #ifdef __VMS
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278 | vms_special_exit(result, vms_show);
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279 | #else
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280 | return (int)result;
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281 | #endif
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282 | }
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283 |
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284 | #endif /* ndef UNITTESTS */
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