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 | #define ENABLE_CURLX_PRINTF
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25 | /* use our own printf() functions */
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26 | #include "curlx.h"
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27 |
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28 | #include "tool_cfgable.h"
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29 | #include "tool_getparam.h"
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30 | #include "tool_helpers.h"
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31 | #include "tool_homedir.h"
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32 | #include "tool_msgs.h"
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33 | #include "tool_parsecfg.h"
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34 |
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35 | #include "memdebug.h" /* keep this as LAST include */
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36 |
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37 | #define CURLRC DOT_CHAR "curlrc"
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38 |
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39 | /* only acknowledge colon or equals as separators if the option was not
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40 | specified with an initial dash! */
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41 | #define ISSEP(x,dash) (!dash && (((x) == '=') || ((x) == ':')))
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42 |
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43 | static const char *unslashquote(const char *line, char *param);
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44 | static char *my_get_line(FILE *fp);
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45 |
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46 | /* return 0 on everything-is-fine, and non-zero otherwise */
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47 | int parseconfig(const char *filename, struct GlobalConfig *global)
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48 | {
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49 | int res;
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50 | FILE *file;
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51 | char filebuffer[512];
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52 | bool usedarg = FALSE;
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53 | char *home;
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54 | int rc = 0;
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55 | struct OperationConfig *operation = global->first;
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56 |
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57 | if(!filename || !*filename) {
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58 | /* NULL or no file name attempts to load .curlrc from the homedir! */
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59 |
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60 | #ifndef __AMIGA__
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61 | filename = CURLRC; /* sensible default */
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62 | home = homedir(); /* portable homedir finder */
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63 | if(home) {
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64 | if(strlen(home) < (sizeof(filebuffer) - strlen(CURLRC))) {
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65 | snprintf(filebuffer, sizeof(filebuffer),
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66 | "%s%s%s", home, DIR_CHAR, CURLRC);
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67 |
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68 | #ifdef WIN32
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69 | /* Check if the file exists - if not, try CURLRC in the same
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70 | * directory as our executable
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71 | */
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72 | file = fopen(filebuffer, FOPEN_READTEXT);
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73 | if(file != NULL) {
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74 | fclose(file);
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75 | filename = filebuffer;
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76 | }
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77 | else {
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78 | /* Get the filename of our executable. GetModuleFileName is
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79 | * already declared via inclusions done in setup header file.
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80 | * We assume that we are using the ASCII version here.
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81 | */
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82 | int n = GetModuleFileNameA(0, filebuffer, sizeof(filebuffer));
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83 | if(n > 0 && n < (int)sizeof(filebuffer)) {
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84 | /* We got a valid filename - get the directory part */
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85 | char *lastdirchar = strrchr(filebuffer, '\\');
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86 | if(lastdirchar) {
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87 | size_t remaining;
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88 | *lastdirchar = 0;
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89 | /* If we have enough space, build the RC filename */
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90 | remaining = sizeof(filebuffer) - strlen(filebuffer);
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91 | if(strlen(CURLRC) < remaining - 1) {
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92 | snprintf(lastdirchar, remaining,
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93 | "%s%s", DIR_CHAR, CURLRC);
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94 | /* Don't bother checking if it exists - we do
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95 | * that later
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96 | */
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97 | filename = filebuffer;
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98 | }
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99 | }
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100 | }
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101 | }
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102 | #else /* WIN32 */
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103 | filename = filebuffer;
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104 | #endif /* WIN32 */
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105 | }
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106 | Curl_safefree(home); /* we've used it, now free it */
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107 | }
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108 |
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109 | # else /* __AMIGA__ */
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110 | /* On AmigaOS all the config files are into env:
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111 | */
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112 | filename = "ENV:" CURLRC;
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113 |
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114 | #endif
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115 | }
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116 |
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117 | if(strcmp(filename, "-"))
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118 | file = fopen(filename, FOPEN_READTEXT);
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119 | else
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120 | file = stdin;
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121 |
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122 | if(file) {
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123 | char *line;
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124 | char *aline;
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125 | char *option;
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126 | char *param;
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127 | int lineno = 0;
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128 | bool alloced_param;
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129 | bool dashed_option;
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130 |
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131 | while(NULL != (aline = my_get_line(file))) {
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132 | lineno++;
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133 | line = aline;
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134 | alloced_param = FALSE;
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135 |
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136 | /* line with # in the first non-blank column is a comment! */
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137 | while(*line && ISSPACE(*line))
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138 | line++;
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139 |
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140 | switch(*line) {
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141 | case '#':
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142 | case '/':
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143 | case '\r':
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144 | case '\n':
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145 | case '*':
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146 | case '\0':
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147 | Curl_safefree(aline);
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148 | continue;
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149 | }
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150 |
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151 | /* the option keywords starts here */
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152 | option = line;
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153 |
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154 | /* the option starts with a dash? */
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155 | dashed_option = option[0]=='-'?TRUE:FALSE;
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156 |
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157 | while(*line && !ISSPACE(*line) && !ISSEP(*line, dashed_option))
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158 | line++;
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159 | /* ... and has ended here */
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160 |
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161 | if(*line)
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162 | *line++ = '\0'; /* zero terminate, we have a local copy of the data */
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163 |
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164 | #ifdef DEBUG_CONFIG
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165 | fprintf(stderr, "GOT: %s\n", option);
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166 | #endif
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167 |
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168 | /* pass spaces and separator(s) */
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169 | while(*line && (ISSPACE(*line) || ISSEP(*line, dashed_option)))
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170 | line++;
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171 |
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172 | /* the parameter starts here (unless quoted) */
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173 | if(*line == '\"') {
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174 | /* quoted parameter, do the quote dance */
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175 | line++;
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176 | param = malloc(strlen(line) + 1); /* parameter */
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177 | if(!param) {
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178 | /* out of memory */
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179 | Curl_safefree(aline);
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180 | rc = 1;
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181 | break;
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182 | }
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183 | alloced_param = TRUE;
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184 | (void)unslashquote(line, param);
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185 | }
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186 | else {
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187 | param = line; /* parameter starts here */
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188 | while(*line && !ISSPACE(*line))
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189 | line++;
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190 |
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191 | if(*line) {
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192 | *line = '\0'; /* zero terminate */
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193 |
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194 | /* to detect mistakes better, see if there's data following */
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195 | line++;
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196 | /* pass all spaces */
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197 | while(*line && ISSPACE(*line))
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198 | line++;
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199 |
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200 | switch(*line) {
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201 | case '\0':
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202 | case '\r':
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203 | case '\n':
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204 | case '#': /* comment */
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205 | break;
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206 | default:
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207 | warnf(operation->global, "%s:%d: warning: '%s' uses unquoted "
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208 | "white space in the line that may cause side-effects!\n",
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209 | filename, lineno, option);
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210 | }
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211 | }
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212 | if(!*param)
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213 | /* do this so getparameter can check for required parameters.
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214 | Otherwise it always thinks there's a parameter. */
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215 | param = NULL;
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216 | }
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217 |
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218 | #ifdef DEBUG_CONFIG
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219 | fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
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220 | #endif
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221 | res = getparameter(option, param, &usedarg, global, operation);
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222 |
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223 | if(!res && param && *param && !usedarg)
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224 | /* we passed in a parameter that wasn't used! */
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225 | res = PARAM_GOT_EXTRA_PARAMETER;
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226 |
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227 | if(res == PARAM_NEXT_OPERATION) {
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228 | if(operation->url_list && operation->url_list->url) {
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229 | /* Allocate the next config */
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230 | operation->next = malloc(sizeof(struct OperationConfig));
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231 | if(operation->next) {
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232 | /* Initialise the newly created config */
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233 | config_init(operation->next);
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234 |
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235 | /* Copy the easy handle */
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236 | operation->next->easy = global->easy;
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237 |
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238 | /* Set the global config pointer */
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239 | operation->next->global = global;
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240 |
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241 | /* Update the last operation pointer */
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242 | global->last = operation->next;
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243 |
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244 | /* Move onto the new config */
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245 | operation->next->prev = operation;
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246 | operation = operation->next;
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247 | }
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248 | else
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249 | res = PARAM_NO_MEM;
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250 | }
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251 | }
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252 |
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253 | if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) {
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254 | /* the help request isn't really an error */
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255 | if(!strcmp(filename, "-")) {
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256 | filename = "<stdin>";
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257 | }
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258 | if(res != PARAM_HELP_REQUESTED &&
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259 | res != PARAM_MANUAL_REQUESTED &&
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260 | res != PARAM_VERSION_INFO_REQUESTED &&
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261 | res != PARAM_ENGINES_REQUESTED) {
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262 | const char *reason = param2text(res);
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263 | warnf(operation->global, "%s:%d: warning: '%s' %s\n",
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264 | filename, lineno, option, reason);
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265 | }
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266 | }
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267 |
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268 | if(alloced_param)
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269 | Curl_safefree(param);
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270 |
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271 | Curl_safefree(aline);
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272 | }
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273 | if(file != stdin)
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274 | fclose(file);
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275 | }
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276 | else
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277 | rc = 1; /* couldn't open the file */
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278 |
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279 | return rc;
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280 | }
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281 |
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282 | /*
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283 | * Copies the string from line to the buffer at param, unquoting
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284 | * backslash-quoted characters and NUL-terminating the output string.
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285 | * Stops at the first non-backslash-quoted double quote character or the
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286 | * end of the input string. param must be at least as long as the input
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287 | * string. Returns the pointer after the last handled input character.
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288 | */
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289 | static const char *unslashquote(const char *line, char *param)
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290 | {
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291 | while(*line && (*line != '\"')) {
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292 | if(*line == '\\') {
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293 | char out;
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294 | line++;
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295 |
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296 | /* default is to output the letter after the backslash */
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297 | switch(out = *line) {
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298 | case '\0':
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299 | continue; /* this'll break out of the loop */
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300 | case 't':
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301 | out = '\t';
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302 | break;
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303 | case 'n':
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304 | out = '\n';
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305 | break;
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306 | case 'r':
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307 | out = '\r';
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308 | break;
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309 | case 'v':
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310 | out = '\v';
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311 | break;
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312 | }
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313 | *param++ = out;
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314 | line++;
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315 | }
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316 | else
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317 | *param++ = *line++;
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318 | }
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319 | *param = '\0'; /* always zero terminate */
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320 | return line;
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321 | }
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322 |
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323 | /*
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324 | * Reads a line from the given file, ensuring is NUL terminated.
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325 | * The pointer must be freed by the caller.
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326 | * NULL is returned on an out of memory condition.
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327 | */
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328 | static char *my_get_line(FILE *fp)
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329 | {
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330 | char buf[4096];
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331 | char *nl = NULL;
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332 | char *line = NULL;
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333 |
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334 | do {
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335 | if(NULL == fgets(buf, sizeof(buf), fp))
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336 | break;
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337 | if(!line) {
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338 | line = strdup(buf);
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339 | if(!line)
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340 | return NULL;
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341 | }
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342 | else {
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343 | char *ptr;
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344 | size_t linelen = strlen(line);
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345 | ptr = realloc(line, linelen + strlen(buf) + 1);
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346 | if(!ptr) {
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347 | Curl_safefree(line);
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348 | return NULL;
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349 | }
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350 | line = ptr;
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351 | strcpy(&line[linelen], buf);
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352 | }
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353 | nl = strchr(line, '\n');
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354 | } while(!nl);
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355 |
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356 | if(nl)
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357 | *nl = '\0';
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358 |
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359 | return line;
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360 | }
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361 |
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