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Date:: Wed Jan 15 22:10:31 2020 UTC
Message:: remove examples file
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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_WWW_PATH STRING {
112 			if ((gw_conf->got_www_path = strdup($2)) == NULL)
113 				errx(1, "out of memory");
114 		}
115 		| GOT_MAX_REPOS NUMBER {
116 			if ($2 > 0)
117 				gw_conf->got_max_repos = $2;
118 		}
119 		| GOT_SITE_NAME STRING {
120 				if ((gw_conf->got_site_name = strdup($2)) == NULL)
121 				errx(1, "out of memory");
122 		}
123 		| GOT_SITE_OWNER STRING {
124 				if ((gw_conf->got_site_owner = strdup($2)) == NULL)
125 				errx(1, "out of memory");
126 		}
127 		| GOT_SITE_LINK STRING {
128 				if ((gw_conf->got_site_link = strdup($2)) == NULL)
129 				errx(1, "out of memory");
130 		}
131 		| GOT_LOGO STRING {
132 				if ((gw_conf->got_logo = strdup($2)) == NULL)
133 				errx(1, "out of memory");
134 		}
135 		| GOT_LOGO_URL STRING {
136 				if ((gw_conf->got_logo_url = strdup($2)) == NULL)
137 				errx(1, "out of memory");
138 		}
139 		| GOT_SHOW_SITE_OWNER boolean {
140 			gw_conf->got_show_site_owner = $2;
141 		}
142 		| GOT_SHOW_REPO_OWNER boolean {
143 			gw_conf->got_show_repo_owner = $2;
144 		}
145 		| GOT_SHOW_REPO_AGE boolean { gw_conf->got_show_repo_age = $2; }
146 		| GOT_SHOW_REPO_DESCRIPTION boolean {
147 			gw_conf->got_show_repo_description =	$2;
148 		}
149 		| GOT_SHOW_REPO_CLONEURL boolean {
150 			gw_conf->got_show_repo_cloneurl =	$2;
151 		}
152 		| GOT_MAX_REPOS_DISPLAY NUMBER {
153 			if ($2 > 0)
154 				gw_conf->got_max_repos_display = $2;
155 		}
156 		| GOT_MAX_COMMITS_DISPLAY NUMBER {
157 			if ($2 > 0)
158 				gw_conf->got_max_commits_display = $2;
159 		}
160 		;
161 
162 %%
163 
164 struct keywords {
165 	const char	*k_name;
166 	int		 k_val;
167 };
168 
169 int
170 yyerror(const char *fmt, ...)
171 {
172 	va_list		 ap;
173 	char		*msg = NULL;
174 	static char	 err_msg[512];
175 
176 	file->errors++;
177 	va_start(ap, fmt);
178 	if (vasprintf(&msg, fmt, ap) == -1)
179 		errx(1, "yyerror vasprintf");
180 	va_end(ap);
181 	snprintf(err_msg, sizeof(err_msg), "%s:%d: %s", file->name,
182 	    yylval.lineno, msg);
183 	gerror = got_error_from_errno2("parse_error", err_msg);
184 
185 	free(msg);
186 	return (0);
187 }
188 
189 int
190 kw_cmp(const void *k, const void *e)
191 {
192 	return (strcmp(k, ((const struct keywords *)e)->k_name));
193 }
194 
195 int
196 lookup(char *s)
197 {
198 	/* this has to be sorted always */
199 	static const struct keywords keywords[] = {
200 		{ "got_logo",			GOT_LOGO },
201 		{ "got_logo_url",		GOT_LOGO_URL },
202 		{ "got_max_commits_display",	GOT_MAX_COMMITS_DISPLAY },
203 		{ "got_max_repos",		GOT_MAX_REPOS },
204 		{ "got_max_repos_display",	GOT_MAX_REPOS_DISPLAY },
205 		{ "got_repos_path",		GOT_REPOS_PATH },
206 		{ "got_show_repo_age",		GOT_SHOW_REPO_AGE },
207 		{ "got_show_repo_cloneurl",	GOT_SHOW_REPO_CLONEURL },
208 		{ "got_show_repo_description",	GOT_SHOW_REPO_DESCRIPTION },
209 		{ "got_show_repo_owner",	GOT_SHOW_REPO_OWNER },
210 		{ "got_show_site_owner",	GOT_SHOW_SITE_OWNER },
211 		{ "got_site_link",		GOT_SITE_LINK },
212 		{ "got_site_name",		GOT_SITE_NAME },
213 		{ "got_site_owner",		GOT_SITE_OWNER },
214 		{ "got_www_path",		GOT_WWW_PATH },
215 	};
216 	const struct keywords	*p;
217 
218 	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
219 	    sizeof(keywords[0]), kw_cmp);
220 
221 	if (p)
222 		return (p->k_val);
223 	else
224 		return (STRING);
225 }
226 
227 #define MAXPUSHBACK	128
228 
229 u_char	*parsebuf;
230 int	 parseindex;
231 u_char	 pushback_buffer[MAXPUSHBACK];
232 int	 pushback_index = 0;
233 
234 int
235 lgetc(int quotec)
236 {
237 	int		c, next;
238 
239 	if (parsebuf) {
240 		/* Read character from the parsebuffer instead of input. */
241 		if (parseindex >= 0) {
242 			c = parsebuf[parseindex++];
243 			if (c != '\0')
244 				return (c);
245 			parsebuf = NULL;
246 		} else
247 			parseindex++;
248 	}
249 
250 	if (pushback_index)
251 		return (pushback_buffer[--pushback_index]);
252 
253 	if (quotec) {
254 		if ((c = getc(file->stream)) == EOF) {
255 			yyerror("reached end of file while parsing "
256 			    "quoted string");
257 			if (file == topfile || popfile() == EOF)
258 				return (EOF);
259 			return (quotec);
260 		}
261 		return (c);
262 	}
263 
264 	while ((c = getc(file->stream)) == '\\') {
265 		next = getc(file->stream);
266 		if (next != '\n') {
267 			c = next;
268 			break;
269 		}
270 		yylval.lineno = file->lineno;
271 		file->lineno++;
272 	}
273 
274 	while (c == EOF) {
275 		if (file == topfile || popfile() == EOF)
276 			return (EOF);
277 		c = getc(file->stream);
278 	}
279 	return (c);
280 }
281 
282 int
283 lungetc(int c)
284 {
285 	if (c == EOF)
286 		return (EOF);
287 	if (parsebuf) {
288 		parseindex--;
289 		if (parseindex >= 0)
290 			return (c);
291 	}
292 	if (pushback_index < MAXPUSHBACK-1)
293 		return (pushback_buffer[pushback_index++] = c);
294 	else
295 		return (EOF);
296 }
297 
298 int
299 findeol(void)
300 {
301 	int	c;
302 
303 	parsebuf = NULL;
304 
305 	/* skip to either EOF or the first real EOL */
306 	while (1) {
307 		if (pushback_index)
308 			c = pushback_buffer[--pushback_index];
309 		else
310 			c = lgetc(0);
311 		if (c == '\n') {
312 			file->lineno++;
313 			break;
314 		}
315 		if (c == EOF)
316 			break;
317 	}
318 	return (ERROR);
319 }
320 
321 int
322 yylex(void)
323 {
324 	u_char	 buf[8096];
325 	u_char	*p;
326 	int	 quotec, next, c;
327 	int	 token;
328 
329 	p = buf;
330 	while ((c = lgetc(0)) == ' ' || c == '\t')
331 		; /* nothing */
332 
333 	yylval.lineno = file->lineno;
334 	if (c == '#')
335 		while ((c = lgetc(0)) != '\n' && c != EOF)
336 			; /* nothing */
337 
338 	switch (c) {
339 	case '\'':
340 	case '"':
341 		quotec = c;
342 		while (1) {
343 			if ((c = lgetc(quotec)) == EOF)
344 				return (0);
345 			if (c == '\n') {
346 				file->lineno++;
347 				continue;
348 			} else if (c == '\\') {
349 				if ((next = lgetc(quotec)) == EOF)
350 					return (0);
351 				if (next == quotec || next == ' ' ||
352 				    next == '\t')
353 					c = next;
354 				else if (next == '\n') {
355 					file->lineno++;
356 					continue;
357 				} else
358 					lungetc(next);
359 			} else if (c == quotec) {
360 				*p = '\0';
361 				break;
362 			} else if (c == '\0') {
363 				yyerror("syntax error");
364 				return (findeol());
365 			}
366 			if (p + 1 >= buf + sizeof(buf) - 1) {
367 				yyerror("string too long");
368 				return (findeol());
369 			}
370 			*p++ = c;
371 		}
372 		yylval.v.string = strdup(buf);
373 		if (yylval.v.string == NULL)
374 			errx(1, "yylex: strdup");
375 		return (STRING);
376 	}
377 
378 #define allowed_to_end_number(x) \
379 	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
380 
381 	if (c == '-' || isdigit(c)) {
382 		do {
383 			*p++ = c;
384 			if ((size_t)(p-buf) >= sizeof(buf)) {
385 				yyerror("string too long");
386 				return (findeol());
387 			}
388 		} while ((c = lgetc(0)) != EOF && isdigit(c));
389 		lungetc(c);
390 		if (p == buf + 1 && buf[0] == '-')
391 			goto nodigits;
392 		if (c == EOF || allowed_to_end_number(c)) {
393 			const char *errstr = NULL;
394 
395 			*p = '\0';
396 			yylval.v.number = strtonum(buf, LLONG_MIN,
397 			    LLONG_MAX, &errstr);
398 			if (errstr) {
399 				yyerror("\"%s\" invalid number: %s",
400 				    buf, errstr);
401 				return (findeol());
402 			}
403 			return (NUMBER);
404 		} else {
405 nodigits:
406 			while (p > buf + 1)
407 				lungetc(*--p);
408 			c = *--p;
409 			if (c == '-')
410 				return (c);
411 		}
412 	}
413 
414 #define allowed_in_string(x) \
415 	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
416 	x != '{' && x != '}' && x != '<' && x != '>' && \
417 	x != '!' && x != '=' && x != '/' && x != '#' && \
418 	x != ','))
419 
420 	if (isalnum(c) || c == ':' || c == '_' || c == '*') {
421 		do {
422 			*p++ = c;
423 			if ((size_t)(p-buf) >= sizeof(buf)) {
424 				yyerror("string too long");
425 				return (findeol());
426 			}
427 		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
428 		lungetc(c);
429 		*p = '\0';
430 		if ((token = lookup(buf)) == STRING)
431 			if ((yylval.v.string = strdup(buf)) == NULL)
432 				errx(1, "yylex: strdup");
433 		return (token);
434 	}
435 	if (c == '\n') {
436 		yylval.lineno = file->lineno;
437 		file->lineno++;
438 	}
439 	if (c == EOF)
440 		return (0);
441 	return (c);
442 }
443 
444 struct file *
445 pushfile(const char *name)
446 {
447 	struct file	*nfile;
448 
449 	if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
450 		gerror = got_error(GOT_ERR_NO_SPACE);
451 		return (NULL);
452 	}
453 	if ((nfile->name = strdup(name)) == NULL) {
454 		gerror = got_error(GOT_ERR_NO_SPACE);
455 		free(nfile);
456 		return (NULL);
457 	}
458 	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
459 		gerror = got_error_from_errno2("parse_conf", nfile->name);
460 		free(nfile->name);
461 		free(nfile);
462 		return (NULL);
463 	}
464 	nfile->lineno = 1;
465 	TAILQ_INSERT_TAIL(&files, nfile, entry);
466 	return (nfile);
467 }
468 
469 int
470 popfile(void)
471 {
472 	struct file	*prev;
473 
474 	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
475 		prev->errors += file->errors;
476 
477 	TAILQ_REMOVE(&files, file, entry);
478 	fclose(file->stream);
479 	free(file->name);
480 	free(file);
481 	file = prev;
482 	return (file ? 0 : EOF);
483 }
484 
485 const struct got_error*
486 parse_conf(const char *filename, struct gotweb_conf *gconf)
487 {
488 	static const struct got_error*	 error = NULL;
489 
490 	gw_conf = gconf;
491 	if ((gw_conf->got_repos_path = strdup(D_GOTPATH)) == NULL)
492 	err(1, "strdup");
493 	if ((gw_conf->got_www_path = strdup(D_GOTWWW)) == NULL)
494 	err(1, "strdup");
495 	if ((gw_conf->got_site_name = strdup(D_SITENAME)) == NULL)
496 	err(1, "strdup");
497 	if ((gw_conf->got_site_owner = strdup(D_SITEOWNER)) == NULL)
498 	err(1, "strdup");
499 	if ((gw_conf->got_site_link = strdup(D_SITELINK)) == NULL)
500 	err(1, "strdup");
501 	if ((gw_conf->got_logo = strdup(D_GOTLOGO)) == NULL)
502 	err(1, "strdup");
503 	if ((gw_conf->got_logo_url = strdup(D_GOTURL)) == NULL)
504 	err(1, "strdup");
505 	gw_conf->got_show_site_owner = D_SHOWSOWNER;
506 	gw_conf->got_show_repo_owner = D_SHOWROWNER;
507 	gw_conf->got_show_repo_age = D_SHOWAGE;
508 	gw_conf->got_show_repo_description = D_SHOWDESC;
509 	gw_conf->got_show_repo_cloneurl = D_SHOWURL;
510 	gw_conf->got_max_repos = D_MAXREPO;
511 	gw_conf->got_max_repos_display = D_MAXREPODISP;
512 	gw_conf->got_max_commits_display = D_MAXCOMMITDISP;
513 	if ((file = pushfile(filename)) == NULL) {
514 		goto done;
515 	}
516 	topfile = file;
517 
518 	yyparse();
519 	popfile();
520 	if (gerror)
521 		error = gerror;
522 done:
523 	return error;
524 }