1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, 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
execpath(const char * filename)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 */
parseconfig(const char * filename,struct GlobalConfig * global)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->first;
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 /* check for .curlrc then _curlrc in the home dir */
101 pathalloc = curl_maprintf("%s%s%ccurlrc", home, DIR_CHAR, prefix);
102 if(!pathalloc) {
103 free(home);
104 return 1; /* out of memory */
105 }
106
107 /* Check if the file exists - if not, try _curlrc */
108 file = fopen(pathalloc, FOPEN_READTEXT);
109 if(file) {
110 filename = pathalloc;
111 break;
112 }
113 prefix = '_';
114 } while(++i < 2);
115 }
116 if(!filename) {
117 /* check for .curlrc then _curlrc in the dir of the executable */
118 file = execpath(".curlrc");
119 if(!file)
120 file = execpath("_curlrc");
121 }
122 #endif
123
124 Curl_safefree(home); /* we've used it, now free it */
125 }
126
127 if(!file && filename) { /* no need to fopen() again */
128 if(strcmp(filename, "-"))
129 file = fopen(filename, FOPEN_READTEXT);
130 else
131 file = stdin;
132 }
133
134 if(file) {
135 char *line;
136 char *aline;
137 char *option;
138 char *param;
139 int lineno = 0;
140 bool dashed_option;
141
142 while(NULL != (aline = my_get_line(file))) {
143 int res;
144 bool alloced_param = FALSE;
145 lineno++;
146 line = aline;
147
148 /* line with # in the first non-blank column is a comment! */
149 while(*line && ISSPACE(*line))
150 line++;
151
152 switch(*line) {
153 case '#':
154 case '/':
155 case '\r':
156 case '\n':
157 case '*':
158 case '\0':
159 Curl_safefree(aline);
160 continue;
161 }
162
163 /* the option keywords starts here */
164 option = line;
165
166 /* the option starts with a dash? */
167 dashed_option = option[0]=='-'?TRUE:FALSE;
168
169 while(*line && !ISSPACE(*line) && !ISSEP(*line, dashed_option))
170 line++;
171 /* ... and has ended here */
172
173 if(*line)
174 *line++ = '\0'; /* zero terminate, we have a local copy of the data */
175
176 #ifdef DEBUG_CONFIG
177 fprintf(stderr, "GOT: %s\n", option);
178 #endif
179
180 /* pass spaces and separator(s) */
181 while(*line && (ISSPACE(*line) || ISSEP(*line, dashed_option)))
182 line++;
183
184 /* the parameter starts here (unless quoted) */
185 if(*line == '\"') {
186 /* quoted parameter, do the quote dance */
187 line++;
188 param = malloc(strlen(line) + 1); /* parameter */
189 if(!param) {
190 /* out of memory */
191 Curl_safefree(aline);
192 rc = 1;
193 break;
194 }
195 alloced_param = TRUE;
196 (void)unslashquote(line, param);
197 }
198 else {
199 param = line; /* parameter starts here */
200 while(*line && !ISSPACE(*line))
201 line++;
202
203 if(*line) {
204 *line = '\0'; /* zero terminate */
205
206 /* to detect mistakes better, see if there's data following */
207 line++;
208 /* pass all spaces */
209 while(*line && ISSPACE(*line))
210 line++;
211
212 switch(*line) {
213 case '\0':
214 case '\r':
215 case '\n':
216 case '#': /* comment */
217 break;
218 default:
219 warnf(operation->global, "%s:%d: warning: '%s' uses unquoted "
220 "white space in the line that may cause side-effects!\n",
221 filename, lineno, option);
222 }
223 }
224 if(!*param)
225 /* do this so getparameter can check for required parameters.
226 Otherwise it always thinks there's a parameter. */
227 param = NULL;
228 }
229
230 #ifdef DEBUG_CONFIG
231 fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
232 #endif
233 res = getparameter(option, param, &usedarg, global, operation);
234
235 if(!res && param && *param && !usedarg)
236 /* we passed in a parameter that wasn't used! */
237 res = PARAM_GOT_EXTRA_PARAMETER;
238
239 if(res == PARAM_NEXT_OPERATION) {
240 if(operation->url_list && operation->url_list->url) {
241 /* Allocate the next config */
242 operation->next = malloc(sizeof(struct OperationConfig));
243 if(operation->next) {
244 /* Initialise the newly created config */
245 config_init(operation->next);
246
247 /* Set the global config pointer */
248 operation->next->global = global;
249
250 /* Update the last operation pointer */
251 global->last = operation->next;
252
253 /* Move onto the new config */
254 operation->next->prev = operation;
255 operation = operation->next;
256 }
257 else
258 res = PARAM_NO_MEM;
259 }
260 }
261
262 if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) {
263 /* the help request isn't really an error */
264 if(!strcmp(filename, "-")) {
265 filename = "<stdin>";
266 }
267 if(res != PARAM_HELP_REQUESTED &&
268 res != PARAM_MANUAL_REQUESTED &&
269 res != PARAM_VERSION_INFO_REQUESTED &&
270 res != PARAM_ENGINES_REQUESTED) {
271 const char *reason = param2text(res);
272 warnf(operation->global, "%s:%d: warning: '%s' %s\n",
273 filename, lineno, option, reason);
274 }
275 }
276
277 if(alloced_param)
278 Curl_safefree(param);
279
280 Curl_safefree(aline);
281 }
282 if(file != stdin)
283 fclose(file);
284 }
285 else
286 rc = 1; /* couldn't open the file */
287
288 free(pathalloc);
289 return rc;
290 }
291
292 /*
293 * Copies the string from line to the buffer at param, unquoting
294 * backslash-quoted characters and NUL-terminating the output string.
295 * Stops at the first non-backslash-quoted double quote character or the
296 * end of the input string. param must be at least as long as the input
297 * string. Returns the pointer after the last handled input character.
298 */
unslashquote(const char * line,char * param)299 static const char *unslashquote(const char *line, char *param)
300 {
301 while(*line && (*line != '\"')) {
302 if(*line == '\\') {
303 char out;
304 line++;
305
306 /* default is to output the letter after the backslash */
307 switch(out = *line) {
308 case '\0':
309 continue; /* this'll break out of the loop */
310 case 't':
311 out = '\t';
312 break;
313 case 'n':
314 out = '\n';
315 break;
316 case 'r':
317 out = '\r';
318 break;
319 case 'v':
320 out = '\v';
321 break;
322 }
323 *param++ = out;
324 line++;
325 }
326 else
327 *param++ = *line++;
328 }
329 *param = '\0'; /* always zero terminate */
330 return line;
331 }
332
333 /*
334 * Reads a line from the given file, ensuring is NUL terminated.
335 * The pointer must be freed by the caller.
336 * NULL is returned on an out of memory condition.
337 */
my_get_line(FILE * fp)338 static char *my_get_line(FILE *fp)
339 {
340 char buf[4096];
341 char *nl = NULL;
342 char *line = NULL;
343
344 do {
345 if(NULL == fgets(buf, sizeof(buf), fp))
346 break;
347 if(!line) {
348 line = strdup(buf);
349 if(!line)
350 return NULL;
351 }
352 else {
353 char *ptr;
354 size_t linelen = strlen(line);
355 ptr = realloc(line, linelen + strlen(buf) + 1);
356 if(!ptr) {
357 Curl_safefree(line);
358 return NULL;
359 }
360 line = ptr;
361 strcpy(&line[linelen], buf);
362 }
363 nl = strchr(line, '\n');
364 } while(!nl);
365
366 if(nl)
367 *nl = '\0';
368
369 return line;
370 }
371