1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2018, 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 #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 */
parseconfig(const char * filename,struct GlobalConfig * global)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 */
unslashquote(const char * line,char * param)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 */
my_get_line(FILE * fp)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