1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2014, 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 http://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
43static const char *unslashquote(const char *line, char *param);
44static char *my_get_line(FILE *fp);
45
46/* return 0 on everything-is-fine, and non-zero otherwise */
47int parseconfig(const char *filename, struct GlobalConfig *global)
48{
49  int res;
50  FILE *file;
51  char filebuffer[512];
52  bool usedarg;
53  char *home;
54  int rc = 0;
55  struct OperationConfig *operation = global->first;
56
57  if(!filename || !*filename) {
58    /* NULL or no file name attempts to load .curlrc from the homedir! */
59
60#ifndef __AMIGA__
61    filename = CURLRC;   /* sensible default */
62    home = homedir();    /* portable homedir finder */
63    if(home) {
64      if(strlen(home) < (sizeof(filebuffer) - strlen(CURLRC))) {
65        snprintf(filebuffer, sizeof(filebuffer),
66                 "%s%s%s", home, DIR_CHAR, CURLRC);
67
68#ifdef WIN32
69        /* Check if the file exists - if not, try CURLRC in the same
70         * directory as our executable
71         */
72        file = fopen(filebuffer, "r");
73        if(file != NULL) {
74          fclose(file);
75          filename = filebuffer;
76        }
77        else {
78          /* Get the filename of our executable. GetModuleFileName is
79           * already declared via inclusions done in setup header file.
80           * We assume that we are using the ASCII version here.
81           */
82          int n = GetModuleFileName(0, filebuffer, sizeof(filebuffer));
83          if(n > 0 && n < (int)sizeof(filebuffer)) {
84            /* We got a valid filename - get the directory part */
85            char *lastdirchar = strrchr(filebuffer, '\\');
86            if(lastdirchar) {
87              size_t remaining;
88              *lastdirchar = 0;
89              /* If we have enough space, build the RC filename */
90              remaining = sizeof(filebuffer) - strlen(filebuffer);
91              if(strlen(CURLRC) < remaining - 1) {
92                snprintf(lastdirchar, remaining,
93                         "%s%s", DIR_CHAR, CURLRC);
94                /* Don't bother checking if it exists - we do
95                 * that later
96                 */
97                filename = filebuffer;
98              }
99            }
100          }
101        }
102#else /* WIN32 */
103        filename = filebuffer;
104#endif /* WIN32 */
105      }
106      Curl_safefree(home); /* we've used it, now free it */
107    }
108
109# else /* __AMIGA__ */
110    /* On AmigaOS all the config files are into env:
111     */
112    filename = "ENV:" CURLRC;
113
114#endif
115  }
116
117  if(strcmp(filename,"-"))
118    file = fopen(filename, "r");
119  else
120    file = stdin;
121
122  if(file) {
123    char *line;
124    char *aline;
125    char *option;
126    char *param;
127    int lineno = 0;
128    bool alloced_param;
129    bool dashed_option;
130
131    while(NULL != (aline = my_get_line(file))) {
132      lineno++;
133      line = aline;
134      alloced_param=FALSE;
135
136      /* line with # in the first non-blank column is a comment! */
137      while(*line && ISSPACE(*line))
138        line++;
139
140      switch(*line) {
141      case '#':
142      case '/':
143      case '\r':
144      case '\n':
145      case '*':
146      case '\0':
147        Curl_safefree(aline);
148        continue;
149      }
150
151      /* the option keywords starts here */
152      option = line;
153
154      /* the option starts with a dash? */
155      dashed_option = option[0]=='-'?TRUE:FALSE;
156
157      while(*line && !ISSPACE(*line) && !ISSEP(*line, dashed_option))
158        line++;
159      /* ... and has ended here */
160
161      if(*line)
162        *line++ = '\0'; /* zero terminate, we have a local copy of the data */
163
164#ifdef DEBUG_CONFIG
165      fprintf(stderr, "GOT: %s\n", option);
166#endif
167
168      /* pass spaces and separator(s) */
169      while(*line && (ISSPACE(*line) || ISSEP(*line, dashed_option)))
170        line++;
171
172      /* the parameter starts here (unless quoted) */
173      if(*line == '\"') {
174        /* quoted parameter, do the quote dance */
175        line++;
176        param = malloc(strlen(line) + 1); /* parameter */
177        if(!param) {
178          /* out of memory */
179          Curl_safefree(aline);
180          rc = 1;
181          break;
182        }
183        alloced_param = TRUE;
184        (void)unslashquote(line, param);
185      }
186      else {
187        param = line; /* parameter starts here */
188        while(*line && !ISSPACE(*line))
189          line++;
190        *line = '\0'; /* zero terminate */
191
192        /* to detect mistakes better, see if there's data following */
193        line++;
194        /* pass all spaces */
195        while(*line && ISSPACE(*line))
196          line++;
197
198        switch(*line) {
199        case '\0':
200        case '\r':
201        case '\n':
202        case '#': /* comment */
203          break;
204        default:
205          warnf(operation, "%s:%d: warning: '%s' uses unquoted white space in"
206                " the line that may cause side-effects!\n",
207                filename, lineno, option);
208        }
209      }
210
211      if(param && !*param) {
212        /* do this so getparameter can check for required parameters.
213           Otherwise it always thinks there's a parameter. */
214        if(alloced_param)
215          Curl_safefree(param);
216        param = NULL;
217      }
218
219#ifdef DEBUG_CONFIG
220      fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
221#endif
222      res = getparameter(option, param, &usedarg, global, operation);
223
224      if(param && *param && !usedarg)
225        /* we passed in a parameter that wasn't used! */
226        res = PARAM_GOT_EXTRA_PARAMETER;
227
228      if(res == PARAM_NEXT_OPERATION) {
229        if(operation->url_list && operation->url_list->url) {
230          /* Allocate the next config */
231          operation->next = malloc(sizeof(struct OperationConfig));
232          if(operation->next) {
233            /* Initialise the newly created config */
234            config_init(operation->next);
235
236            /* Copy the easy handle */
237            operation->next->easy = global->easy;
238
239            /* Set the global config pointer */
240            operation->next->global = global;
241
242            /* Update the last operation pointer */
243            global->last = operation->next;
244
245            /* Move onto the new config */
246            operation->next->prev = operation;
247            operation = operation->next;
248          }
249          else
250            res = PARAM_NO_MEM;
251        }
252      }
253
254      if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) {
255        /* the help request isn't really an error */
256        if(!strcmp(filename, "-")) {
257          filename = (char *)"<stdin>";
258        }
259        if(res != PARAM_HELP_REQUESTED &&
260           res != PARAM_MANUAL_REQUESTED &&
261           res != PARAM_VERSION_INFO_REQUESTED &&
262           res != PARAM_ENGINES_REQUESTED) {
263          const char *reason = param2text(res);
264          warnf(operation, "%s:%d: warning: '%s' %s\n",
265                filename, lineno, option, reason);
266        }
267      }
268
269      if(alloced_param)
270        Curl_safefree(param);
271
272      Curl_safefree(aline);
273    }
274    if(file != stdin)
275      fclose(file);
276  }
277  else
278    rc = 1; /* couldn't open the file */
279
280  return rc;
281}
282
283/*
284 * Copies the string from line to the buffer at param, unquoting
285 * backslash-quoted characters and NUL-terminating the output string.
286 * Stops at the first non-backslash-quoted double quote character or the
287 * end of the input string. param must be at least as long as the input
288 * string.  Returns the pointer after the last handled input character.
289 */
290static const char *unslashquote(const char *line, char *param)
291{
292  while(*line && (*line != '\"')) {
293    if(*line == '\\') {
294      char out;
295      line++;
296
297      /* default is to output the letter after the backslash */
298      switch(out = *line) {
299      case '\0':
300        continue; /* this'll break out of the loop */
301      case 't':
302        out = '\t';
303        break;
304      case 'n':
305        out = '\n';
306        break;
307      case 'r':
308        out = '\r';
309        break;
310      case 'v':
311        out = '\v';
312        break;
313      }
314      *param++ = out;
315      line++;
316    }
317    else
318      *param++ = *line++;
319  }
320  *param = '\0'; /* always zero terminate */
321  return line;
322}
323
324/*
325 * Reads a line from the given file, ensuring is NUL terminated.
326 * The pointer must be freed by the caller.
327 * NULL is returned on an out of memory condition.
328 */
329static char *my_get_line(FILE *fp)
330{
331  char buf[4096];
332  char *nl = NULL;
333  char *line = NULL;
334
335  do {
336    if(NULL == fgets(buf, sizeof(buf), fp))
337      break;
338    if(!line) {
339      line = strdup(buf);
340      if(!line)
341        return NULL;
342    }
343    else {
344      char *ptr;
345      size_t linelen = strlen(line);
346      ptr = realloc(line, linelen + strlen(buf) + 1);
347      if(!ptr) {
348        Curl_safefree(line);
349        return NULL;
350      }
351      line = ptr;
352      strcpy(&line[linelen], buf);
353    }
354    nl = strchr(line, '\n');
355  } while(!nl);
356
357  if(nl)
358    *nl = '\0';
359
360  return line;
361}
362
363