source: azure_iot_hub/trunk/curl-7.57.0/src/tool_parsecfg.c@ 388

Last change on this file since 388 was 388, checked in by coas-nagasima, 5 years ago

Azure IoT Hub Device C SDK を使ったサンプルの追加
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/x-csrc
File size: 10.0 KB
Line 
1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2017, 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
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 = FALSE;
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, FOPEN_READTEXT);
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 = GetModuleFileNameA(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, FOPEN_READTEXT);
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
191 if(*line) {
192 *line = '\0'; /* zero terminate */
193
194 /* to detect mistakes better, see if there's data following */
195 line++;
196 /* pass all spaces */
197 while(*line && ISSPACE(*line))
198 line++;
199
200 switch(*line) {
201 case '\0':
202 case '\r':
203 case '\n':
204 case '#': /* comment */
205 break;
206 default:
207 warnf(operation->global, "%s:%d: warning: '%s' uses unquoted "
208 "white space in the line that may cause side-effects!\n",
209 filename, lineno, option);
210 }
211 }
212 if(!*param)
213 /* do this so getparameter can check for required parameters.
214 Otherwise it always thinks there's a parameter. */
215 param = NULL;
216 }
217
218#ifdef DEBUG_CONFIG
219 fprintf(stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
220#endif
221 res = getparameter(option, param, &usedarg, global, operation);
222
223 if(!res && param && *param && !usedarg)
224 /* we passed in a parameter that wasn't used! */
225 res = PARAM_GOT_EXTRA_PARAMETER;
226
227 if(res == PARAM_NEXT_OPERATION) {
228 if(operation->url_list && operation->url_list->url) {
229 /* Allocate the next config */
230 operation->next = malloc(sizeof(struct OperationConfig));
231 if(operation->next) {
232 /* Initialise the newly created config */
233 config_init(operation->next);
234
235 /* Copy the easy handle */
236 operation->next->easy = global->easy;
237
238 /* Set the global config pointer */
239 operation->next->global = global;
240
241 /* Update the last operation pointer */
242 global->last = operation->next;
243
244 /* Move onto the new config */
245 operation->next->prev = operation;
246 operation = operation->next;
247 }
248 else
249 res = PARAM_NO_MEM;
250 }
251 }
252
253 if(res != PARAM_OK && res != PARAM_NEXT_OPERATION) {
254 /* the help request isn't really an error */
255 if(!strcmp(filename, "-")) {
256 filename = "<stdin>";
257 }
258 if(res != PARAM_HELP_REQUESTED &&
259 res != PARAM_MANUAL_REQUESTED &&
260 res != PARAM_VERSION_INFO_REQUESTED &&
261 res != PARAM_ENGINES_REQUESTED) {
262 const char *reason = param2text(res);
263 warnf(operation->global, "%s:%d: warning: '%s' %s\n",
264 filename, lineno, option, reason);
265 }
266 }
267
268 if(alloced_param)
269 Curl_safefree(param);
270
271 Curl_safefree(aline);
272 }
273 if(file != stdin)
274 fclose(file);
275 }
276 else
277 rc = 1; /* couldn't open the file */
278
279 return rc;
280}
281
282/*
283 * Copies the string from line to the buffer at param, unquoting
284 * backslash-quoted characters and NUL-terminating the output string.
285 * Stops at the first non-backslash-quoted double quote character or the
286 * end of the input string. param must be at least as long as the input
287 * string. Returns the pointer after the last handled input character.
288 */
289static const char *unslashquote(const char *line, char *param)
290{
291 while(*line && (*line != '\"')) {
292 if(*line == '\\') {
293 char out;
294 line++;
295
296 /* default is to output the letter after the backslash */
297 switch(out = *line) {
298 case '\0':
299 continue; /* this'll break out of the loop */
300 case 't':
301 out = '\t';
302 break;
303 case 'n':
304 out = '\n';
305 break;
306 case 'r':
307 out = '\r';
308 break;
309 case 'v':
310 out = '\v';
311 break;
312 }
313 *param++ = out;
314 line++;
315 }
316 else
317 *param++ = *line++;
318 }
319 *param = '\0'; /* always zero terminate */
320 return line;
321}
322
323/*
324 * Reads a line from the given file, ensuring is NUL terminated.
325 * The pointer must be freed by the caller.
326 * NULL is returned on an out of memory condition.
327 */
328static char *my_get_line(FILE *fp)
329{
330 char buf[4096];
331 char *nl = NULL;
332 char *line = NULL;
333
334 do {
335 if(NULL == fgets(buf, sizeof(buf), fp))
336 break;
337 if(!line) {
338 line = strdup(buf);
339 if(!line)
340 return NULL;
341 }
342 else {
343 char *ptr;
344 size_t linelen = strlen(line);
345 ptr = realloc(line, linelen + strlen(buf) + 1);
346 if(!ptr) {
347 Curl_safefree(line);
348 return NULL;
349 }
350 line = ptr;
351 strcpy(&line[linelen], buf);
352 }
353 nl = strchr(line, '\n');
354 } while(!nl);
355
356 if(nl)
357 *nl = '\0';
358
359 return line;
360}
361
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