1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel (at) haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 #include "tool_setup.h" 23 24 #define ENABLE_CURLX_PRINTF 25 /* use our own printf() functions */ 26 #include "curlx.h" 27 28 #include "tool_cfgable.h" 29 #include "tool_getparam.h" 30 #include "tool_helpers.h" 31 #include "tool_homedir.h" 32 #include "tool_msgs.h" 33 #include "tool_parsecfg.h" 34 35 #include "memdebug.h" /* keep this as LAST include */ 36 37 #define CURLRC DOT_CHAR "curlrc" 38 39 /* only acknowledge colon or equals as separators if the option was not 40 specified with an initial dash! */ 41 #define ISSEP(x,dash) (!dash && (((x) == '=') || ((x) == ':'))) 42 43 static const char *unslashquote(const char *line, char *param); 44 static char *my_get_line(FILE *fp); 45 46 /* return 0 on everything-is-fine, and non-zero otherwise */ 47 int parseconfig(const char *filename, struct GlobalConfig *global) 48 { 49 FILE *file; 50 char filebuffer[512]; 51 bool usedarg = FALSE; 52 int rc = 0; 53 struct OperationConfig *operation = global->first; 54 55 if(!filename || !*filename) { 56 /* NULL or no file name attempts to load .curlrc from the homedir! */ 57 58 #ifndef __AMIGA__ 59 char *home = homedir(); /* portable homedir finder */ 60 filename = CURLRC; /* sensible default */ 61 if(home) { 62 if(strlen(home) < (sizeof(filebuffer) - strlen(CURLRC))) { 63 msnprintf(filebuffer, sizeof(filebuffer), 64 "%s%s%s", home, DIR_CHAR, CURLRC); 65 66 #ifdef WIN32 67 /* Check if the file exists - if not, try CURLRC in the same 68 * directory as our executable 69 */ 70 file = fopen(filebuffer, FOPEN_READTEXT); 71 if(file != NULL) { 72 fclose(file); 73 filename = filebuffer; 74 } 75 else { 76 /* Get the filename of our executable. GetModuleFileName is 77 * already declared via inclusions done in setup header file. 78 * We assume that we are using the ASCII version here. 79 */ 80 int n = GetModuleFileNameA(0, filebuffer, sizeof(filebuffer)); 81 if(n > 0 && n < (int)sizeof(filebuffer)) { 82 /* We got a valid filename - get the directory part */ 83 char *lastdirchar = strrchr(filebuffer, '\\'); 84 if(lastdirchar) { 85 size_t remaining; 86 *lastdirchar = 0; 87 /* If we have enough space, build the RC filename */ 88 remaining = sizeof(filebuffer) - strlen(filebuffer); 89 if(strlen(CURLRC) < remaining - 1) { 90 msnprintf(lastdirchar, remaining, 91 "%s%s", DIR_CHAR, CURLRC); 92 /* Don't bother checking if it exists - we do that later */ 93 filename = filebuffer; 94 } 95 } 96 } 97 } 98 #else /* WIN32 */ 99 filename = filebuffer; 100 #endif /* WIN32 */ 101 } 102 Curl_safefree(home); /* we've used it, now free it */ 103 } 104 105 # else /* __AMIGA__ */ 106 /* On AmigaOS all the config files are into env: 107 */ 108 filename = "ENV:" CURLRC; 109 110 #endif 111 } 112 113 if(strcmp(filename, "-")) 114 file = fopen(filename, FOPEN_READTEXT); 115 else 116 file = stdin; 117 118 if(file) { 119 char *line; 120 char *aline; 121 char *option; 122 char *param; 123 int lineno = 0; 124 bool dashed_option; 125 126 while(NULL != (aline = my_get_line(file))) { 127 int res; 128 bool alloced_param = FALSE; 129 lineno++; 130 line = aline; 131 132 /* line with # in the first non-blank column is a comment! */ 133 while(*line && ISSPACE(*line)) 134 line++; 135 136 switch(*line) { 137 case '#': 138 case '/': 139 case '\r': 140 case '\n': 141 case '*': 142 case '\0': 143 Curl_safefree(aline); 144 continue; 145 } 146 147 /* the option keywords starts here */ 148 option = line; 149 150 /* the option starts with a dash? */ 151 dashed_option = option[0]=='-'?TRUE:FALSE; 152 153 while(*line && !ISSPACE(*line) && !ISSEP(*line, dashed_option)) 154 line++; 155 /* ... and has ended here */ 156 157 if(*line) 158 *line++ = '\0'; /* zero terminate, we have a local copy of the data */ 159 160 #ifdef DEBUG_CONFIG 161 fprintf(stderr, "GOT: %s\n", option); 162 #endif 163 164 /* pass spaces and separator(s) */ 165 while(*line && (ISSPACE(*line) || ISSEP(*line, dashed_option))) 166 line++; 167 168 /* the parameter starts here (unless quoted) */ 169 if(*line == '\"') { 170 /* quoted parameter, do the quote dance */ 171 line++; 172 param = malloc(strlen(line) + 1); /* parameter */ 173 if(!param) { 174 /* out of memory */ 175 Curl_safefree(aline); 176 rc = 1; 177 break; 178 } 179 alloced_param = TRUE; 180 (void)unslashquote(line, param); 181 } 182 else { 183 param = line; /* parameter starts here */ 184 while(*line && !ISSPACE(*line)) 185 line++; 186 187 if(*line) { 188 *line = '\0'; /* zero terminate */ 189 190 /* to detect mistakes better, see if there's data following */ 191 line++; 192 /* pass all spaces */ 193 while(*line && ISSPACE(*line)) 194 line++; 195 196 switch(*line) { 197 case '\0': 198 case '\r': 199 case '\n': 200 case '#': /* comment */ 201 break; 202 default: 203 warnf(operation->global, "%s:%d: warning: '%s' uses unquoted " 204 "white space in the line that may cause side-effects!\n", 205 filename, lineno, option); 206 } 207 } 208 if(!*param) 209 /* do this so getparameter can check for required parameters. 210 Otherwise it always thinks there's a parameter. */ 211 param = NULL; 212 } 213 214 #ifdef DEBUG_CONFIG 215 fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)")); 216 #endif 217 res = getparameter(option, param, &usedarg, global, operation); 218 219 if(!res && param && *param && !usedarg) 220 /* we passed in a parameter that wasn't used! */ 221 res = PARAM_GOT_EXTRA_PARAMETER; 222 223 if(res == PARAM_NEXT_OPERATION) { 224 if(operation->url_list && operation->url_list->url) { 225 /* Allocate the next config */ 226 operation->next = malloc(sizeof(struct OperationConfig)); 227 if(operation->next) { 228 /* Initialise the newly created config */ 229 config_init(operation->next); 230 231 /* Copy the easy handle */ 232 operation->next->easy = global->easy; 233 234 /* Set the global config pointer */ 235 operation->next->global = global; 236 237 /* Update the last operation pointer */ 238 global->last = operation->next; 239 240 /* Move onto the new config */ 241 operation->next->prev = operation; 242 operation = operation->next; 243 } 244 else 245 res = PARAM_NO_MEM; 246 } 247 } 248 249 if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) { 250 /* the help request isn't really an error */ 251 if(!strcmp(filename, "-")) { 252 filename = "<stdin>"; 253 } 254 if(res != PARAM_HELP_REQUESTED && 255 res != PARAM_MANUAL_REQUESTED && 256 res != PARAM_VERSION_INFO_REQUESTED && 257 res != PARAM_ENGINES_REQUESTED) { 258 const char *reason = param2text(res); 259 warnf(operation->global, "%s:%d: warning: '%s' %s\n", 260 filename, lineno, option, reason); 261 } 262 } 263 264 if(alloced_param) 265 Curl_safefree(param); 266 267 Curl_safefree(aline); 268 } 269 if(file != stdin) 270 fclose(file); 271 } 272 else 273 rc = 1; /* couldn't open the file */ 274 275 return rc; 276 } 277 278 /* 279 * Copies the string from line to the buffer at param, unquoting 280 * backslash-quoted characters and NUL-terminating the output string. 281 * Stops at the first non-backslash-quoted double quote character or the 282 * end of the input string. param must be at least as long as the input 283 * string. Returns the pointer after the last handled input character. 284 */ 285 static const char *unslashquote(const char *line, char *param) 286 { 287 while(*line && (*line != '\"')) { 288 if(*line == '\\') { 289 char out; 290 line++; 291 292 /* default is to output the letter after the backslash */ 293 switch(out = *line) { 294 case '\0': 295 continue; /* this'll break out of the loop */ 296 case 't': 297 out = '\t'; 298 break; 299 case 'n': 300 out = '\n'; 301 break; 302 case 'r': 303 out = '\r'; 304 break; 305 case 'v': 306 out = '\v'; 307 break; 308 } 309 *param++ = out; 310 line++; 311 } 312 else 313 *param++ = *line++; 314 } 315 *param = '\0'; /* always zero terminate */ 316 return line; 317 } 318 319 /* 320 * Reads a line from the given file, ensuring is NUL terminated. 321 * The pointer must be freed by the caller. 322 * NULL is returned on an out of memory condition. 323 */ 324 static char *my_get_line(FILE *fp) 325 { 326 char buf[4096]; 327 char *nl = NULL; 328 char *line = NULL; 329 330 do { 331 if(NULL == fgets(buf, sizeof(buf), fp)) 332 break; 333 if(!line) { 334 line = strdup(buf); 335 if(!line) 336 return NULL; 337 } 338 else { 339 char *ptr; 340 size_t linelen = strlen(line); 341 ptr = realloc(line, linelen + strlen(buf) + 1); 342 if(!ptr) { 343 Curl_safefree(line); 344 return NULL; 345 } 346 line = ptr; 347 strcpy(&line[linelen], buf); 348 } 349 nl = strchr(line, '\n'); 350 } while(!nl); 351 352 if(nl) 353 *nl = '\0'; 354 355 return line; 356 } 357
