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Date:: Tue Jan 28 18:42:10 2020 UTC
Message:: remove got_www_path which is not actually used
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1 /*
2  * Copyright (c) 2019 Tracey Emery <tracey@traceyemery.net>
3  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
4  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
5  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
6  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
7  *
8  * Permission to use, copy, modify, and distribute this software for any
9  * purpose with or without fee is hereby granted, provided that the above
10  * copyright notice and this permission notice appear in all copies.
11  *
12  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19  */
20 
21 %{
22 #include <sys/types.h>
23 #include <sys/queue.h>
24 
25 #include <ctype.h>
26 #include <err.h>
27 #include <limits.h>
28 #include <stdarg.h>
29 #include <stdbool.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 
34 #include "gotweb.h"
35 
36 TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
37 static struct file {
38 	TAILQ_ENTRY(file)	 entry;
39 	FILE			*stream;
40 	char			*name;
41 	int			 lineno;
42 	int			 errors;
43 	const struct got_error*	 error;
44 } *file, *topfile;
45 struct file	*pushfile(const char *);
46 int		 popfile(void);
47 int		 yyparse(void);
48 int		 yylex(void);
49 int		 yyerror(const char *, ...)
50     __attribute__((__format__ (printf, 1, 2)))
51     __attribute__((__nonnull__ (1)));
52 int		 kw_cmp(const void *, const void *);
53 int		 lookup(char *);
54 int		 lgetc(int);
55 int		 lungetc(int);
56 int		 findeol(void);
57 
58 static const struct got_error*	 gerror = NULL;
59 char				*syn_err;
60 
61 struct gotweb_conf		*gw_conf;
62 
63 typedef struct {
64 	union {
65 		int64_t			 number;
66 		char			*string;
67 	} v;
68 	int lineno;
69 } YYSTYPE;
70 
71 %}
72 
73 %token	GOT_WWW_PATH GOT_MAX_REPOS GOT_SITE_NAME GOT_SITE_OWNER GOT_SITE_LINK
74 %token	GOT_LOGO GOT_LOGO_URL GOT_SHOW_REPO_OWNER GOT_SHOW_REPO_AGE
75 %token	GOT_SHOW_REPO_DESCRIPTION GOT_MAX_REPOS_DISPLAY GOT_REPOS_PATH
76 %token	GOT_MAX_COMMITS_DISPLAY ON ERROR GOT_SHOW_SITE_OWNER
77 %token	GOT_SHOW_REPO_CLONEURL
78 %token	<v.string>		STRING
79 %token	<v.number>		NUMBER
80 %type	<v.number>		boolean
81 %%
82 
83 grammar		: /* empty */
84 		| grammar '\n'
85 		| grammar main '\n'
86 		| grammar error '\n'		{ file->errors++; }
87 		;
88 
89 boolean		: STRING			{
90 			if (strcasecmp($1, "true") == 0 ||
91 			    strcasecmp($1, "yes") == 0)
92 				$$ = 1;
93 			else if (strcasecmp($1, "false") == 0 ||
94 			    strcasecmp($1, "off") == 0 ||
95 			    strcasecmp($1, "no") == 0)
96 				$$ = 0;
97 			else {
98 				yyerror("invalid boolean value '%s'", $1);
99 				free($1);
100 				YYERROR;
101 			}
102 			free($1);
103 		}
104 		| ON				{ $$ = 1; }
105 		;
106 
107 main		: GOT_REPOS_PATH STRING {
108 			if ((gw_conf->got_repos_path = strdup($2)) == NULL)
109 				errx(1, "out of memory");
110 		}
111 		| GOT_MAX_REPOS NUMBER {
112 			if ($2 > 0)
113 				gw_conf->got_max_repos = $2;
114 		}
115 		| GOT_SITE_NAME STRING {
116 				if ((gw_conf->got_site_name = strdup($2)) == NULL)
117 				errx(1, "out of memory");
118 		}
119 		| GOT_SITE_OWNER STRING {
120 				if ((gw_conf->got_site_owner = strdup($2)) == NULL)
121 				errx(1, "out of memory");
122 		}
123 		| GOT_SITE_LINK STRING {
124 				if ((gw_conf->got_site_link = strdup($2)) == NULL)
125 				errx(1, "out of memory");
126 		}
127 		| GOT_LOGO STRING {
128 				if ((gw_conf->got_logo = strdup($2)) == NULL)
129 				errx(1, "out of memory");
130 		}
131 		| GOT_LOGO_URL STRING {
132 				if ((gw_conf->got_logo_url = strdup($2)) == NULL)
133 				errx(1, "out of memory");
134 		}
135 		| GOT_SHOW_SITE_OWNER boolean {
136 			gw_conf->got_show_site_owner = $2;
137 		}
138 		| GOT_SHOW_REPO_OWNER boolean {
139 			gw_conf->got_show_repo_owner = $2;
140 		}
141 		| GOT_SHOW_REPO_AGE boolean { gw_conf->got_show_repo_age = $2; }
142 		| GOT_SHOW_REPO_DESCRIPTION boolean {
143 			gw_conf->got_show_repo_description =	$2;
144 		}
145 		| GOT_SHOW_REPO_CLONEURL boolean {
146 			gw_conf->got_show_repo_cloneurl =	$2;
147 		}
148 		| GOT_MAX_REPOS_DISPLAY NUMBER {
149 			if ($2 > 0)
150 				gw_conf->got_max_repos_display = $2;
151 		}
152 		| GOT_MAX_COMMITS_DISPLAY NUMBER {
153 			if ($2 > 0)
154 				gw_conf->got_max_commits_display = $2;
155 		}
156 		;
157 
158 %%
159 
160 struct keywords {
161 	const char	*k_name;
162 	int		 k_val;
163 };
164 
165 int
166 yyerror(const char *fmt, ...)
167 {
168 	va_list		 ap;
169 	char		*msg = NULL;
170 	static char	 err_msg[512];
171 
172 	file->errors++;
173 	va_start(ap, fmt);
174 	if (vasprintf(&msg, fmt, ap) == -1)
175 		errx(1, "yyerror vasprintf");
176 	va_end(ap);
177 	snprintf(err_msg, sizeof(err_msg), "%s:%d: %s", file->name,
178 	    yylval.lineno, msg);
179 	gerror = got_error_from_errno2("parse_error", err_msg);
180 
181 	free(msg);
182 	return (0);
183 }
184 
185 int
186 kw_cmp(const void *k, const void *e)
187 {
188 	return (strcmp(k, ((const struct keywords *)e)->k_name));
189 }
190 
191 int
192 lookup(char *s)
193 {
194 	/* this has to be sorted always */
195 	static const struct keywords keywords[] = {
196 		{ "got_logo",			GOT_LOGO },
197 		{ "got_logo_url",		GOT_LOGO_URL },
198 		{ "got_max_commits_display",	GOT_MAX_COMMITS_DISPLAY },
199 		{ "got_max_repos",		GOT_MAX_REPOS },
200 		{ "got_max_repos_display",	GOT_MAX_REPOS_DISPLAY },
201 		{ "got_repos_path",		GOT_REPOS_PATH },
202 		{ "got_show_repo_age",		GOT_SHOW_REPO_AGE },
203 		{ "got_show_repo_cloneurl",	GOT_SHOW_REPO_CLONEURL },
204 		{ "got_show_repo_description",	GOT_SHOW_REPO_DESCRIPTION },
205 		{ "got_show_repo_owner",	GOT_SHOW_REPO_OWNER },
206 		{ "got_show_site_owner",	GOT_SHOW_SITE_OWNER },
207 		{ "got_site_link",		GOT_SITE_LINK },
208 		{ "got_site_name",		GOT_SITE_NAME },
209 		{ "got_site_owner",		GOT_SITE_OWNER },
210 	};
211 	const struct keywords	*p;
212 
213 	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
214 	    sizeof(keywords[0]), kw_cmp);
215 
216 	if (p)
217 		return (p->k_val);
218 	else
219 		return (STRING);
220 }
221 
222 #define MAXPUSHBACK	128
223 
224 u_char	*parsebuf;
225 int	 parseindex;
226 u_char	 pushback_buffer[MAXPUSHBACK];
227 int	 pushback_index = 0;
228 
229 int
230 lgetc(int quotec)
231 {
232 	int		c, next;
233 
234 	if (parsebuf) {
235 		/* Read character from the parsebuffer instead of input. */
236 		if (parseindex >= 0) {
237 			c = parsebuf[parseindex++];
238 			if (c != '\0')
239 				return (c);
240 			parsebuf = NULL;
241 		} else
242 			parseindex++;
243 	}
244 
245 	if (pushback_index)
246 		return (pushback_buffer[--pushback_index]);
247 
248 	if (quotec) {
249 		if ((c = getc(file->stream)) == EOF) {
250 			yyerror("reached end of file while parsing "
251 			    "quoted string");
252 			if (file == topfile || popfile() == EOF)
253 				return (EOF);
254 			return (quotec);
255 		}
256 		return (c);
257 	}
258 
259 	while ((c = getc(file->stream)) == '\\') {
260 		next = getc(file->stream);
261 		if (next != '\n') {
262 			c = next;
263 			break;
264 		}
265 		yylval.lineno = file->lineno;
266 		file->lineno++;
267 	}
268 
269 	while (c == EOF) {
270 		if (file == topfile || popfile() == EOF)
271 			return (EOF);
272 		c = getc(file->stream);
273 	}
274 	return (c);
275 }
276 
277 int
278 lungetc(int c)
279 {
280 	if (c == EOF)
281 		return (EOF);
282 	if (parsebuf) {
283 		parseindex--;
284 		if (parseindex >= 0)
285 			return (c);
286 	}
287 	if (pushback_index < MAXPUSHBACK-1)
288 		return (pushback_buffer[pushback_index++] = c);
289 	else
290 		return (EOF);
291 }
292 
293 int
294 findeol(void)
295 {
296 	int	c;
297 
298 	parsebuf = NULL;
299 
300 	/* skip to either EOF or the first real EOL */
301 	while (1) {
302 		if (pushback_index)
303 			c = pushback_buffer[--pushback_index];
304 		else
305 			c = lgetc(0);
306 		if (c == '\n') {
307 			file->lineno++;
308 			break;
309 		}
310 		if (c == EOF)
311 			break;
312 	}
313 	return (ERROR);
314 }
315 
316 int
317 yylex(void)
318 {
319 	u_char	 buf[8096];
320 	u_char	*p;
321 	int	 quotec, next, c;
322 	int	 token;
323 
324 	p = buf;
325 	while ((c = lgetc(0)) == ' ' || c == '\t')
326 		; /* nothing */
327 
328 	yylval.lineno = file->lineno;
329 	if (c == '#')
330 		while ((c = lgetc(0)) != '\n' && c != EOF)
331 			; /* nothing */
332 
333 	switch (c) {
334 	case '\'':
335 	case '"':
336 		quotec = c;
337 		while (1) {
338 			if ((c = lgetc(quotec)) == EOF)
339 				return (0);
340 			if (c == '\n') {
341 				file->lineno++;
342 				continue;
343 			} else if (c == '\\') {
344 				if ((next = lgetc(quotec)) == EOF)
345 					return (0);
346 				if (next == quotec || next == ' ' ||
347 				    next == '\t')
348 					c = next;
349 				else if (next == '\n') {
350 					file->lineno++;
351 					continue;
352 				} else
353 					lungetc(next);
354 			} else if (c == quotec) {
355 				*p = '\0';
356 				break;
357 			} else if (c == '\0') {
358 				yyerror("syntax error");
359 				return (findeol());
360 			}
361 			if (p + 1 >= buf + sizeof(buf) - 1) {
362 				yyerror("string too long");
363 				return (findeol());
364 			}
365 			*p++ = c;
366 		}
367 		yylval.v.string = strdup(buf);
368 		if (yylval.v.string == NULL)
369 			errx(1, "yylex: strdup");
370 		return (STRING);
371 	}
372 
373 #define allowed_to_end_number(x) \
374 	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
375 
376 	if (c == '-' || isdigit(c)) {
377 		do {
378 			*p++ = c;
379 			if ((size_t)(p-buf) >= sizeof(buf)) {
380 				yyerror("string too long");
381 				return (findeol());
382 			}
383 		} while ((c = lgetc(0)) != EOF && isdigit(c));
384 		lungetc(c);
385 		if (p == buf + 1 && buf[0] == '-')
386 			goto nodigits;
387 		if (c == EOF || allowed_to_end_number(c)) {
388 			const char *errstr = NULL;
389 
390 			*p = '\0';
391 			yylval.v.number = strtonum(buf, LLONG_MIN,
392 			    LLONG_MAX, &errstr);
393 			if (errstr) {
394 				yyerror("\"%s\" invalid number: %s",
395 				    buf, errstr);
396 				return (findeol());
397 			}
398 			return (NUMBER);
399 		} else {
400 nodigits:
401 			while (p > buf + 1)
402 				lungetc(*--p);
403 			c = *--p;
404 			if (c == '-')
405 				return (c);
406 		}
407 	}
408 
409 #define allowed_in_string(x) \
410 	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
411 	x != '{' && x != '}' && x != '<' && x != '>' && \
412 	x != '!' && x != '=' && x != '/' && x != '#' && \
413 	x != ','))
414 
415 	if (isalnum(c) || c == ':' || c == '_' || c == '*') {
416 		do {
417 			*p++ = c;
418 			if ((size_t)(p-buf) >= sizeof(buf)) {
419 				yyerror("string too long");
420 				return (findeol());
421 			}
422 		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
423 		lungetc(c);
424 		*p = '\0';
425 		if ((token = lookup(buf)) == STRING)
426 			if ((yylval.v.string = strdup(buf)) == NULL)
427 				errx(1, "yylex: strdup");
428 		return (token);
429 	}
430 	if (c == '\n') {
431 		yylval.lineno = file->lineno;
432 		file->lineno++;
433 	}
434 	if (c == EOF)
435 		return (0);
436 	return (c);
437 }
438 
439 struct file *
440 pushfile(const char *name)
441 {
442 	struct file	*nfile;
443 
444 	if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
445 		gerror = got_error(GOT_ERR_NO_SPACE);
446 		return (NULL);
447 	}
448 	if ((nfile->name = strdup(name)) == NULL) {
449 		gerror = got_error(GOT_ERR_NO_SPACE);
450 		free(nfile);
451 		return (NULL);
452 	}
453 	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
454 		gerror = got_error_from_errno2("parse_conf", nfile->name);
455 		free(nfile->name);
456 		free(nfile);
457 		return (NULL);
458 	}
459 	nfile->lineno = 1;
460 	TAILQ_INSERT_TAIL(&files, nfile, entry);
461 	return (nfile);
462 }
463 
464 int
465 popfile(void)
466 {
467 	struct file	*prev;
468 
469 	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
470 		prev->errors += file->errors;
471 
472 	TAILQ_REMOVE(&files, file, entry);
473 	fclose(file->stream);
474 	free(file->name);
475 	free(file);
476 	file = prev;
477 	return (file ? 0 : EOF);
478 }
479 
480 const struct got_error*
481 parse_conf(const char *filename, struct gotweb_conf *gconf)
482 {
483 	static const struct got_error*	 error = NULL;
484 
485 	gw_conf = gconf;
486 	if ((gw_conf->got_repos_path = strdup(D_GOTPATH)) == NULL)
487 	err(1, "strdup");
488 	if ((gw_conf->got_site_name = strdup(D_SITENAME)) == NULL)
489 	err(1, "strdup");
490 	if ((gw_conf->got_site_owner = strdup(D_SITEOWNER)) == NULL)
491 	err(1, "strdup");
492 	if ((gw_conf->got_site_link = strdup(D_SITELINK)) == NULL)
493 	err(1, "strdup");
494 	if ((gw_conf->got_logo = strdup(D_GOTLOGO)) == NULL)
495 	err(1, "strdup");
496 	if ((gw_conf->got_logo_url = strdup(D_GOTURL)) == NULL)
497 	err(1, "strdup");
498 	gw_conf->got_show_site_owner = D_SHOWSOWNER;
499 	gw_conf->got_show_repo_owner = D_SHOWROWNER;
500 	gw_conf->got_show_repo_age = D_SHOWAGE;
501 	gw_conf->got_show_repo_description = D_SHOWDESC;
502 	gw_conf->got_show_repo_cloneurl = D_SHOWURL;
503 	gw_conf->got_max_repos = D_MAXREPO;
504 	gw_conf->got_max_repos_display = D_MAXREPODISP;
505 	gw_conf->got_max_commits_display = D_MAXCOMMITDISP;
506 	if ((file = pushfile(filename)) == NULL) {
507 		goto done;
508 	}
509 	topfile = file;
510 
511 	yyparse();
512 	popfile();
513 	if (gerror)
514 		error = gerror;
515 done:
516 	return error;
517 }