Annotation of embedaddon/curl/src/tool_parsecfg.c, revision 1.1
1.1 ! misho 1: /***************************************************************************
! 2: * _ _ ____ _
! 3: * Project ___| | | | _ \| |
! 4: * / __| | | | |_) | |
! 5: * | (__| |_| | _ <| |___
! 6: * \___|\___/|_| \_\_____|
! 7: *
! 8: * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@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: /* only acknowledge colon or equals as separators if the option was not
! 38: specified with an initial dash! */
! 39: #define ISSEP(x,dash) (!dash && (((x) == '=') || ((x) == ':')))
! 40:
! 41: static const char *unslashquote(const char *line, char *param);
! 42: static char *my_get_line(FILE *fp);
! 43:
! 44: #ifdef WIN32
! 45: static FILE *execpath(const char *filename)
! 46: {
! 47: char filebuffer[512];
! 48: /* Get the filename of our executable. GetModuleFileName is already declared
! 49: * via inclusions done in setup header file. We assume that we are using
! 50: * the ASCII version here.
! 51: */
! 52: unsigned long len = GetModuleFileNameA(0, filebuffer, sizeof(filebuffer));
! 53: if(len > 0 && len < sizeof(filebuffer)) {
! 54: /* We got a valid filename - get the directory part */
! 55: char *lastdirchar = strrchr(filebuffer, '\\');
! 56: if(lastdirchar) {
! 57: size_t remaining;
! 58: *lastdirchar = 0;
! 59: /* If we have enough space, build the RC filename */
! 60: remaining = sizeof(filebuffer) - strlen(filebuffer);
! 61: if(strlen(filename) < remaining - 1) {
! 62: msnprintf(lastdirchar, remaining, "%s%s", DIR_CHAR, filename);
! 63: return fopen(filebuffer, FOPEN_READTEXT);
! 64: }
! 65: }
! 66: }
! 67:
! 68: return NULL;
! 69: }
! 70: #endif
! 71:
! 72:
! 73: /* return 0 on everything-is-fine, and non-zero otherwise */
! 74: int parseconfig(const char *filename, struct GlobalConfig *global)
! 75: {
! 76: FILE *file = NULL;
! 77: bool usedarg = FALSE;
! 78: int rc = 0;
! 79: struct OperationConfig *operation = global->last;
! 80: char *pathalloc = NULL;
! 81:
! 82: if(!filename || !*filename) {
! 83: /* NULL or no file name attempts to load .curlrc from the homedir! */
! 84:
! 85: char *home = homedir(); /* portable homedir finder */
! 86: #ifndef WIN32
! 87: if(home) {
! 88: pathalloc = curl_maprintf("%s%s.curlrc", home, DIR_CHAR);
! 89: if(!pathalloc) {
! 90: free(home);
! 91: return 1; /* out of memory */
! 92: }
! 93: filename = pathalloc;
! 94: }
! 95: #else /* Windows */
! 96: if(home) {
! 97: int i = 0;
! 98: char prefix = '.';
! 99: do {
! 100: /* if it was allocated in a previous attempt */
! 101: curl_free(pathalloc);
! 102: /* check for .curlrc then _curlrc in the home dir */
! 103: pathalloc = curl_maprintf("%s%s%ccurlrc", home, DIR_CHAR, prefix);
! 104: if(!pathalloc) {
! 105: free(home);
! 106: return 1; /* out of memory */
! 107: }
! 108:
! 109: /* Check if the file exists - if not, try _curlrc */
! 110: file = fopen(pathalloc, FOPEN_READTEXT);
! 111: if(file) {
! 112: filename = pathalloc;
! 113: break;
! 114: }
! 115: prefix = '_';
! 116: } while(++i < 2);
! 117: }
! 118: if(!filename) {
! 119: /* check for .curlrc then _curlrc in the dir of the executable */
! 120: file = execpath(".curlrc");
! 121: if(!file)
! 122: file = execpath("_curlrc");
! 123: }
! 124: #endif
! 125:
! 126: Curl_safefree(home); /* we've used it, now free it */
! 127: }
! 128:
! 129: if(!file && filename) { /* no need to fopen() again */
! 130: if(strcmp(filename, "-"))
! 131: file = fopen(filename, FOPEN_READTEXT);
! 132: else
! 133: file = stdin;
! 134: }
! 135:
! 136: if(file) {
! 137: char *line;
! 138: char *aline;
! 139: char *option;
! 140: char *param;
! 141: int lineno = 0;
! 142: bool dashed_option;
! 143:
! 144: while(NULL != (aline = my_get_line(file))) {
! 145: int res;
! 146: bool alloced_param = FALSE;
! 147: lineno++;
! 148: line = aline;
! 149:
! 150: /* line with # in the first non-blank column is a comment! */
! 151: while(*line && ISSPACE(*line))
! 152: line++;
! 153:
! 154: switch(*line) {
! 155: case '#':
! 156: case '/':
! 157: case '\r':
! 158: case '\n':
! 159: case '*':
! 160: case '\0':
! 161: Curl_safefree(aline);
! 162: continue;
! 163: }
! 164:
! 165: /* the option keywords starts here */
! 166: option = line;
! 167:
! 168: /* the option starts with a dash? */
! 169: dashed_option = option[0]=='-'?TRUE:FALSE;
! 170:
! 171: while(*line && !ISSPACE(*line) && !ISSEP(*line, dashed_option))
! 172: line++;
! 173: /* ... and has ended here */
! 174:
! 175: if(*line)
! 176: *line++ = '\0'; /* zero terminate, we have a local copy of the data */
! 177:
! 178: #ifdef DEBUG_CONFIG
! 179: fprintf(stderr, "GOT: %s\n", option);
! 180: #endif
! 181:
! 182: /* pass spaces and separator(s) */
! 183: while(*line && (ISSPACE(*line) || ISSEP(*line, dashed_option)))
! 184: line++;
! 185:
! 186: /* the parameter starts here (unless quoted) */
! 187: if(*line == '\"') {
! 188: /* quoted parameter, do the quote dance */
! 189: line++;
! 190: param = malloc(strlen(line) + 1); /* parameter */
! 191: if(!param) {
! 192: /* out of memory */
! 193: Curl_safefree(aline);
! 194: rc = 1;
! 195: break;
! 196: }
! 197: alloced_param = TRUE;
! 198: (void)unslashquote(line, param);
! 199: }
! 200: else {
! 201: param = line; /* parameter starts here */
! 202: while(*line && !ISSPACE(*line))
! 203: line++;
! 204:
! 205: if(*line) {
! 206: *line = '\0'; /* zero terminate */
! 207:
! 208: /* to detect mistakes better, see if there's data following */
! 209: line++;
! 210: /* pass all spaces */
! 211: while(*line && ISSPACE(*line))
! 212: line++;
! 213:
! 214: switch(*line) {
! 215: case '\0':
! 216: case '\r':
! 217: case '\n':
! 218: case '#': /* comment */
! 219: break;
! 220: default:
! 221: warnf(operation->global, "%s:%d: warning: '%s' uses unquoted "
! 222: "white space in the line that may cause side-effects!\n",
! 223: filename, lineno, option);
! 224: }
! 225: }
! 226: if(!*param)
! 227: /* do this so getparameter can check for required parameters.
! 228: Otherwise it always thinks there's a parameter. */
! 229: param = NULL;
! 230: }
! 231:
! 232: #ifdef DEBUG_CONFIG
! 233: fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
! 234: #endif
! 235: res = getparameter(option, param, &usedarg, global, operation);
! 236: operation = global->last;
! 237:
! 238: if(!res && param && *param && !usedarg)
! 239: /* we passed in a parameter that wasn't used! */
! 240: res = PARAM_GOT_EXTRA_PARAMETER;
! 241:
! 242: if(res == PARAM_NEXT_OPERATION) {
! 243: if(operation->url_list && operation->url_list->url) {
! 244: /* Allocate the next config */
! 245: operation->next = malloc(sizeof(struct OperationConfig));
! 246: if(operation->next) {
! 247: /* Initialise the newly created config */
! 248: config_init(operation->next);
! 249:
! 250: /* Set the global config pointer */
! 251: operation->next->global = global;
! 252:
! 253: /* Update the last operation pointer */
! 254: global->last = operation->next;
! 255:
! 256: /* Move onto the new config */
! 257: operation->next->prev = operation;
! 258: operation = operation->next;
! 259: }
! 260: else
! 261: res = PARAM_NO_MEM;
! 262: }
! 263: }
! 264:
! 265: if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) {
! 266: /* the help request isn't really an error */
! 267: if(!strcmp(filename, "-")) {
! 268: filename = "<stdin>";
! 269: }
! 270: if(res != PARAM_HELP_REQUESTED &&
! 271: res != PARAM_MANUAL_REQUESTED &&
! 272: res != PARAM_VERSION_INFO_REQUESTED &&
! 273: res != PARAM_ENGINES_REQUESTED) {
! 274: const char *reason = param2text(res);
! 275: warnf(operation->global, "%s:%d: warning: '%s' %s\n",
! 276: filename, lineno, option, reason);
! 277: }
! 278: }
! 279:
! 280: if(alloced_param)
! 281: Curl_safefree(param);
! 282:
! 283: Curl_safefree(aline);
! 284: }
! 285: if(file != stdin)
! 286: fclose(file);
! 287: }
! 288: else
! 289: rc = 1; /* couldn't open the file */
! 290:
! 291: curl_free(pathalloc);
! 292: return rc;
! 293: }
! 294:
! 295: /*
! 296: * Copies the string from line to the buffer at param, unquoting
! 297: * backslash-quoted characters and NUL-terminating the output string.
! 298: * Stops at the first non-backslash-quoted double quote character or the
! 299: * end of the input string. param must be at least as long as the input
! 300: * string. Returns the pointer after the last handled input character.
! 301: */
! 302: static const char *unslashquote(const char *line, char *param)
! 303: {
! 304: while(*line && (*line != '\"')) {
! 305: if(*line == '\\') {
! 306: char out;
! 307: line++;
! 308:
! 309: /* default is to output the letter after the backslash */
! 310: switch(out = *line) {
! 311: case '\0':
! 312: continue; /* this'll break out of the loop */
! 313: case 't':
! 314: out = '\t';
! 315: break;
! 316: case 'n':
! 317: out = '\n';
! 318: break;
! 319: case 'r':
! 320: out = '\r';
! 321: break;
! 322: case 'v':
! 323: out = '\v';
! 324: break;
! 325: }
! 326: *param++ = out;
! 327: line++;
! 328: }
! 329: else
! 330: *param++ = *line++;
! 331: }
! 332: *param = '\0'; /* always zero terminate */
! 333: return line;
! 334: }
! 335:
! 336: /*
! 337: * Reads a line from the given file, ensuring is NUL terminated.
! 338: * The pointer must be freed by the caller.
! 339: * NULL is returned on an out of memory condition.
! 340: */
! 341: static char *my_get_line(FILE *fp)
! 342: {
! 343: char buf[4096];
! 344: char *nl = NULL;
! 345: char *line = NULL;
! 346:
! 347: do {
! 348: if(NULL == fgets(buf, sizeof(buf), fp))
! 349: break;
! 350: if(!line) {
! 351: line = strdup(buf);
! 352: if(!line)
! 353: return NULL;
! 354: }
! 355: else {
! 356: char *ptr;
! 357: size_t linelen = strlen(line);
! 358: ptr = realloc(line, linelen + strlen(buf) + 1);
! 359: if(!ptr) {
! 360: Curl_safefree(line);
! 361: return NULL;
! 362: }
! 363: line = ptr;
! 364: strcpy(&line[linelen], buf);
! 365: }
! 366: nl = strchr(line, '\n');
! 367: } while(!nl);
! 368:
! 369: if(nl)
! 370: *nl = '\0';
! 371:
! 372: return line;
! 373: }
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