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Date:: Tue Jul 5 17:21:44 2022 UTC
Message:: add signer_id option to got.conf(5) Setting this option will cause 'got tag' to sign all created tags using the SSH key, unless overridden by the -s flag. ok stsp@
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1 /*
2  * Copyright (c) 2020, 2021 Tracey Emery <tracey@openbsd.org>
3  * Copyright (c) 2020 Stefan Sperling <stsp@openbsd.org>
4  * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
5  * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
6  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
7  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
8  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
9  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
10  *
11  * Permission to use, copy, modify, and distribute this software for any
12  * purpose with or without fee is hereby granted, provided that the above
13  * copyright notice and this permission notice appear in all copies.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
16  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
17  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
18  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
21  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22  */
23 
24 %{
25 #include <sys/types.h>
26 #include <sys/queue.h>
27 
28 #include <netdb.h>
29 
30 #include <ctype.h>
31 #include <err.h>
32 #include <errno.h>
33 #include <limits.h>
34 #include <stdarg.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 
39 #include "got_error.h"
40 #include "gotconfig.h"
41 
42 static struct file {
43 	FILE			*stream;
44 	const char		*name;
45 	size_t	 		 ungetpos;
46 	size_t			 ungetsize;
47 	u_char			*ungetbuf;
48 	int			 eof_reached;
49 	int			 lineno;
50 } *file;
51 static const struct got_error*	newfile(struct file**, const char *, int *);
52 static void	closefile(struct file *);
53 int		 yyparse(void);
54 int		 yylex(void);
55 int		 yyerror(const char *, ...)
56     __attribute__((__format__ (printf, 1, 2)))
57     __attribute__((__nonnull__ (1)));
58 int		 kw_cmp(const void *, const void *);
59 int		 lookup(char *);
60 int		 igetc(void);
61 int		 lgetc(int);
62 void		 lungetc(int);
63 int		 findeol(void);
64 static int	 parseport(char *, long long *);
65 
66 TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
67 struct sym {
68 	TAILQ_ENTRY(sym)	 entry;
69 	int			 used;
70 	int			 persist;
71 	char			*nam;
72 	char			*val;
73 };
74 
75 int	 symset(const char *, const char *, int);
76 int	 cmdline_symset(char *);
77 char	*symget(const char *);
78 
79 static int	 atoul(char *, u_long *);
80 
81 static const struct got_error* gerror;
82 static struct gotconfig_remote_repo *remote;
83 static struct gotconfig gotconfig;
84 static const struct got_error* new_remote(struct gotconfig_remote_repo **);
85 static const struct got_error* new_fetch_config(struct fetch_config **);
86 static const struct got_error* new_send_config(struct send_config **);
87 
88 typedef struct {
89 	union {
90 		long long	 number;
91 		char		*string;
92 		struct node_branch *branch;
93 		struct node_ref *ref;
94 	} v;
95 	int lineno;
96 } YYSTYPE;
97 
98 %}
99 
100 %token	ERROR
101 %token	REMOTE REPOSITORY SERVER PORT PROTOCOL MIRROR_REFERENCES BRANCH
102 %token	AUTHOR ALLOWED_SIGNERS REVOKED_SIGNERS SIGNER_ID FETCH_ALL_BRANCHES
103 %token	REFERENCE FETCH SEND
104 %token	<v.string>	STRING
105 %token	<v.number>	NUMBER
106 %type	<v.number>	boolean portplain
107 %type	<v.string>	numberstring
108 %type	<v.branch>	branch xbranch branch_list
109 %type	<v.ref>		ref xref ref_list
110 
111 %%
112 
113 grammar		: /* empty */
114 		| grammar '\n'
115 		| grammar author '\n'
116 		| grammar remote '\n'
117 		| grammar allowed_signers '\n'
118 		| grammar revoked_signers '\n'
119 		| grammar signer_id '\n'
120 		;
121 boolean		: STRING {
122 			if (strcasecmp($1, "true") == 0 ||
123 			    strcasecmp($1, "yes") == 0)
124 				$$ = 1;
125 			else if (strcasecmp($1, "false") == 0 ||
126 			    strcasecmp($1, "no") == 0)
127 				$$ = 0;
128 			else {
129 				yyerror("invalid boolean value '%s'", $1);
130 				free($1);
131 				YYERROR;
132 			}
133 			free($1);
134 		}
135 		;
136 numberstring	: NUMBER				{
137 			char	*s;
138 			if (asprintf(&s, "%lld", $1) == -1) {
139 				yyerror("string: asprintf");
140 				YYERROR;
141 			}
142 			$$ = s;
143 		}
144 		| STRING
145 		;
146 portplain	: numberstring	{
147 			if (parseport($1, &$$) == -1) {
148 				free($1);
149 				YYERROR;
150 			}
151 			free($1);
152 		}
153 		;
154 branch		: /* empty */				{ $$ = NULL; }
155 		| xbranch			{ $$ = $1; }
156 		| '{' optnl branch_list '}'	{ $$ = $3; }
157 		;
158 xbranch		: STRING {
159 			$$ = calloc(1, sizeof(struct node_branch));
160 			if ($$ == NULL) {
161 				yyerror("calloc");
162 				YYERROR;
163 			}
164 			$$->branch_name = $1;
165 			$$->tail = $$;
166 		}
167 		;
168 branch_list	: xbranch optnl			{ $$ = $1; }
169 		| branch_list comma xbranch optnl {
170 			$1->tail->next = $3;
171 			$1->tail = $3;
172 			$$ = $1;
173 		}
174 		;
175 ref		: /* empty */		{ $$ = NULL; }
176 		| xref			{ $$ = $1; }
177 		| '{' optnl ref_list '}'	{ $$ = $3; }
178 		;
179 xref		: STRING {
180 			$$ = calloc(1, sizeof(struct node_ref));
181 			if ($$ == NULL) {
182 				yyerror("calloc");
183 				YYERROR;
184 			}
185 			$$->ref_name = $1;
186 			$$->tail = $$;
187 		}
188 		;
189 ref_list	: xref optnl			{ $$ = $1; }
190 		| ref_list comma xref optnl {
191 			$1->tail->next = $3;
192 			$1->tail = $3;
193 			$$ = $1;
194 		}
195 		;
196 remoteopts2	: remoteopts2 remoteopts1 nl
197 		| remoteopts1 optnl
198 		;
199 remoteopts1	: REPOSITORY STRING {
200 			remote->repository = $2;
201 		}
202 		| SERVER STRING {
203 			remote->server = $2;
204 		}
205 		| PROTOCOL STRING {
206 			remote->protocol = $2;
207 		}
208 		| MIRROR_REFERENCES boolean {
209 			remote->mirror_references = $2;
210 		}
211 		| FETCH_ALL_BRANCHES boolean {
212 			remote->fetch_all_branches = $2;
213 		}
214 		| PORT portplain {
215 			remote->port = $2;
216 		}
217 		| BRANCH branch {
218 			remote->branch = $2;
219 		}
220 		| REFERENCE ref {
221 			remote->fetch_ref = $2;
222 		}
223 		| FETCH {
224 			static const struct got_error* error;
225 
226 			if (remote->fetch_config != NULL) {
227 				yyerror("fetch block already exists");
228 				YYERROR;
229 			}
230 			error = new_fetch_config(&remote->fetch_config);
231 			if (error) {
232 				yyerror("%s", error->msg);
233 				YYERROR;
234 			}
235 		} '{' optnl fetchempty '}'
236 		| SEND {
237 			static const struct got_error* error;
238 
239 			if (remote->send_config != NULL) {
240 				yyerror("send block already exists");
241 				YYERROR;
242 			}
243 			error = new_send_config(&remote->send_config);
244 			if (error) {
245 				yyerror("%s", error->msg);
246 				YYERROR;
247 			}
248 		} '{' optnl sendempty '}'
249 		;
250 fetchempty	: /* empty */
251 		| fetchopts2
252 		;
253 fetchopts2	: fetchopts2 fetchopts1 nl
254 		| fetchopts1 optnl
255 		;
256 fetchopts1	: REPOSITORY STRING {
257 			remote->fetch_config->repository = $2;
258 		}
259 		| SERVER STRING {
260 			remote->fetch_config->server = $2;
261 		}
262 		| PROTOCOL STRING {
263 			remote->fetch_config->protocol = $2;
264 		}
265 		| PORT portplain {
266 			remote->fetch_config->port = $2;
267 		}
268 		| BRANCH branch {
269 			remote->fetch_config->branch = $2;
270 		}
271 		;
272 sendempty	: /* empty */
273 		| sendopts2
274 		;
275 sendopts2	: sendopts2 sendopts1 nl
276 		| sendopts1 optnl
277 		;
278 sendopts1	: REPOSITORY STRING {
279 			remote->send_config->repository = $2;
280 		}
281 		| SERVER STRING {
282 			remote->send_config->server = $2;
283 		}
284 		| PROTOCOL STRING {
285 			remote->send_config->protocol = $2;
286 		}
287 		| PORT portplain {
288 			remote->send_config->port = $2;
289 		}
290 		| BRANCH branch {
291 			remote->send_config->branch = $2;
292 		}
293 		;
294 remote		: REMOTE STRING {
295 			static const struct got_error* error;
296 
297 			error = new_remote(&remote);
298 			if (error) {
299 				free($2);
300 				yyerror("%s", error->msg);
301 				YYERROR;
302 			}
303 			remote->name = $2;
304 		} '{' optnl remoteopts2 '}' {
305 			TAILQ_INSERT_TAIL(&gotconfig.remotes, remote, entry);
306 			gotconfig.nremotes++;
307 		}
308 		;
309 author		: AUTHOR STRING {
310 			gotconfig.author = $2;
311 		}
312 		;
313 allowed_signers	: ALLOWED_SIGNERS STRING {
314 			gotconfig.allowed_signers_file = $2;
315 		}
316 		;
317 revoked_signers	: REVOKED_SIGNERS STRING {
318 			gotconfig.revoked_signers_file = $2;
319 		}
320 		;
321 signer_id	: SIGNER_ID STRING {
322 			gotconfig.signer_id = $2;
323 		}
324 		;
325 optnl		: '\n' optnl
326 		| /* empty */
327 		;
328 nl		: '\n' optnl
329 		;
330 comma		: ','
331 		| /* empty */
332 		;
333 %%
334 
335 struct keywords {
336 	const char	*k_name;
337 	int		 k_val;
338 };
339 
340 int
341 yyerror(const char *fmt, ...)
342 {
343 	va_list		 ap;
344 	char		*msg;
345 	char		*err = NULL;
346 
347 	va_start(ap, fmt);
348 	if (vasprintf(&msg, fmt, ap) == -1) {
349 		gerror =  got_error_from_errno("vasprintf");
350 		return 0;
351 	}
352 	va_end(ap);
353 	if (asprintf(&err, "%s: line %d: %s", file->name, yylval.lineno,
354 	    msg) == -1) {
355 		gerror = got_error_from_errno("asprintf");
356 		return(0);
357 	}
358 	gerror = got_error_msg(GOT_ERR_PARSE_CONFIG, err);
359 	free(msg);
360 	return(0);
361 }
362 int
363 kw_cmp(const void *k, const void *e)
364 {
365 	return (strcmp(k, ((const struct keywords *)e)->k_name));
366 }
367 
368 int
369 lookup(char *s)
370 {
371 	/* This has to be sorted always. */
372 	static const struct keywords keywords[] = {
373 		{"allowed_signers",	ALLOWED_SIGNERS},
374 		{"author",		AUTHOR},
375 		{"branch",		BRANCH},
376 		{"fetch",		FETCH},
377 		{"fetch-all-branches",	FETCH_ALL_BRANCHES}, /* deprecated */
378 		{"fetch_all_branches",	FETCH_ALL_BRANCHES},
379 		{"mirror-references",	MIRROR_REFERENCES}, /* deprecated */
380 		{"mirror_references",	MIRROR_REFERENCES},
381 		{"port",		PORT},
382 		{"protocol",		PROTOCOL},
383 		{"reference",		REFERENCE},
384 		{"remote",		REMOTE},
385 		{"repository",		REPOSITORY},
386 		{"revoked_signers",	REVOKED_SIGNERS},
387 		{"send",		SEND},
388 		{"server",		SERVER},
389 		{"signer_id",		SIGNER_ID},
390 	};
391 	const struct keywords	*p;
392 
393 	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
394 	    sizeof(keywords[0]), kw_cmp);
395 
396 	if (p)
397 		return (p->k_val);
398 	else
399 		return (STRING);
400 }
401 
402 #define START_EXPAND	1
403 #define DONE_EXPAND	2
404 
405 static int	expanding;
406 
407 int
408 igetc(void)
409 {
410 	int	c;
411 
412 	while (1) {
413 		if (file->ungetpos > 0)
414 			c = file->ungetbuf[--file->ungetpos];
415 		else
416 			c = getc(file->stream);
417 
418 		if (c == START_EXPAND)
419 			expanding = 1;
420 		else if (c == DONE_EXPAND)
421 			expanding = 0;
422 		else
423 			break;
424 	}
425 	return (c);
426 }
427 
428 int
429 lgetc(int quotec)
430 {
431 	int		c, next;
432 
433 	if (quotec) {
434 		c = igetc();
435 		if (c == EOF) {
436 			yyerror("reached end of file while parsing "
437 			    "quoted string");
438 		}
439 		return (c);
440 	}
441 
442 	c = igetc();
443 	while (c == '\\') {
444 		next = igetc();
445 		if (next != '\n') {
446 			c = next;
447 			break;
448 		}
449 		yylval.lineno = file->lineno;
450 		file->lineno++;
451 	}
452 
453 	return (c);
454 }
455 
456 void
457 lungetc(int c)
458 {
459 	if (c == EOF)
460 		return;
461 
462 	if (file->ungetpos >= file->ungetsize) {
463 		void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
464 		if (p == NULL)
465 			err(1, "%s", __func__);
466 		file->ungetbuf = p;
467 		file->ungetsize *= 2;
468 	}
469 	file->ungetbuf[file->ungetpos++] = c;
470 }
471 
472 int
473 findeol(void)
474 {
475 	int	c;
476 
477 	/* Skip to either EOF or the first real EOL. */
478 	while (1) {
479 		c = lgetc(0);
480 		if (c == '\n') {
481 			file->lineno++;
482 			break;
483 		}
484 		if (c == EOF)
485 			break;
486 	}
487 	return (ERROR);
488 }
489 
490 static long long
491 getservice(char *n)
492 {
493 	struct servent	*s;
494 	u_long		 ulval;
495 
496 	if (atoul(n, &ulval) == 0) {
497 		if (ulval == 0 || ulval > 65535) {
498 			yyerror("illegal port value %lu", ulval);
499 			return (-1);
500 		}
501 		return ulval;
502 	} else {
503 		s = getservbyname(n, "tcp");
504 		if (s == NULL)
505 			s = getservbyname(n, "udp");
506 		if (s == NULL) {
507 			yyerror("unknown port %s", n);
508 			return (-1);
509 		}
510 		return (s->s_port);
511 	}
512 }
513 
514 static int
515 parseport(char *port, long long *pn)
516 {
517 	if ((*pn = getservice(port)) == -1) {
518 		*pn = 0LL;
519 		return (-1);
520 	}
521 	return (0);
522 }
523 
524 
525 int
526 yylex(void)
527 {
528 	char	 buf[8096];
529 	char	*p, *val;
530 	int	 quotec, next, c;
531 	int	 token;
532 
533 top:
534 	p = buf;
535 	c = lgetc(0);
536 	while (c == ' ' || c == '\t')
537 		c = lgetc(0); /* nothing */
538 
539 	yylval.lineno = file->lineno;
540 	if (c == '#') {
541 		c = lgetc(0);
542 		while (c != '\n' && c != EOF)
543 			c = lgetc(0); /* nothing */
544 	}
545 	if (c == '$' && !expanding) {
546 		while (1) {
547 			c = lgetc(0);
548 			if (c == EOF)
549 				return (0);
550 
551 			if (p + 1 >= buf + sizeof(buf) - 1) {
552 				yyerror("string too long");
553 				return (findeol());
554 			}
555 			if (isalnum(c) || c == '_') {
556 				*p++ = c;
557 				continue;
558 			}
559 			*p = '\0';
560 			lungetc(c);
561 			break;
562 		}
563 		val = symget(buf);
564 		if (val == NULL) {
565 			yyerror("macro '%s' not defined", buf);
566 			return (findeol());
567 		}
568 		p = val + strlen(val) - 1;
569 		lungetc(DONE_EXPAND);
570 		while (p >= val) {
571 			lungetc((unsigned char)*p);
572 			p--;
573 		}
574 		lungetc(START_EXPAND);
575 		goto top;
576 	}
577 
578 	switch (c) {
579 	case '\'':
580 	case '"':
581 		quotec = c;
582 		while (1) {
583 			c = lgetc(quotec);
584 			if (c == EOF)
585 				return (0);
586 			if (c == '\n') {
587 				file->lineno++;
588 				continue;
589 			} else if (c == '\\') {
590 				next = lgetc(quotec);
591 				if (next == EOF)
592 					return (0);
593 				if (next == quotec || c == ' ' || c == '\t')
594 					c = next;
595 				else if (next == '\n') {
596 					file->lineno++;
597 					continue;
598 				} else
599 					lungetc(next);
600 			} else if (c == quotec) {
601 				*p = '\0';
602 				break;
603 			} else if (c == '\0') {
604 				yyerror("syntax error");
605 				return (findeol());
606 			}
607 			if (p + 1 >= buf + sizeof(buf) - 1) {
608 				yyerror("string too long");
609 				return (findeol());
610 			}
611 			*p++ = c;
612 		}
613 		yylval.v.string = strdup(buf);
614 		if (yylval.v.string == NULL)
615 			err(1, "%s", __func__);
616 		return (STRING);
617 	}
618 
619 #define allowed_to_end_number(x) \
620 	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
621 
622 	if (c == '-' || isdigit(c)) {
623 		do {
624 			*p++ = c;
625 			if ((size_t)(p-buf) >= sizeof(buf)) {
626 				yyerror("string too long");
627 				return (findeol());
628 			}
629 			c = lgetc(0);
630 		} while (c != EOF && isdigit(c));
631 		lungetc(c);
632 		if (p == buf + 1 && buf[0] == '-')
633 			goto nodigits;
634 		if (c == EOF || allowed_to_end_number(c)) {
635 			const char *errstr = NULL;
636 
637 			*p = '\0';
638 			yylval.v.number = strtonum(buf, LLONG_MIN,
639 			    LLONG_MAX, &errstr);
640 			if (errstr) {
641 				yyerror("\"%s\" invalid number: %s",
642 				    buf, errstr);
643 				return (findeol());
644 			}
645 			return (NUMBER);
646 		} else {
647 nodigits:
648 			while (p > buf + 1)
649 				lungetc((unsigned char)*--p);
650 			c = (unsigned char)*--p;
651 			if (c == '-')
652 				return (c);
653 		}
654 	}
655 
656 #define allowed_in_string(x) \
657 	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
658 	x != '{' && x != '}' && \
659 	x != '!' && x != '=' && x != '#' && \
660 	x != ','))
661 
662 	if (isalnum(c) || c == ':' || c == '_') {
663 		do {
664 			*p++ = c;
665 			if ((size_t)(p-buf) >= sizeof(buf)) {
666 				yyerror("string too long");
667 				return (findeol());
668 			}
669 			c = lgetc(0);
670 		} while (c != EOF && (allowed_in_string(c)));
671 		lungetc(c);
672 		*p = '\0';
673 		token = lookup(buf);
674 		if (token == STRING) {
675 			yylval.v.string = strdup(buf);
676 			if (yylval.v.string == NULL)
677 				err(1, "%s", __func__);
678 		}
679 		return (token);
680 	}
681 	if (c == '\n') {
682 		yylval.lineno = file->lineno;
683 		file->lineno++;
684 	}
685 	if (c == EOF)
686 		return (0);
687 	return (c);
688 }
689 
690 static const struct got_error*
691 newfile(struct file **nfile, const char *filename, int *fd)
692 {
693 	const struct got_error* error = NULL;
694 
695 	(*nfile) = calloc(1, sizeof(struct file));
696 	if ((*nfile) == NULL)
697 		return got_error_from_errno("calloc");
698 	(*nfile)->stream = fdopen(*fd, "r");
699 	if ((*nfile)->stream == NULL) {
700 		error = got_error_from_errno("fdopen");
701 		free((*nfile));
702 		return error;
703 	}
704 	*fd = -1; /* Stream owns the file descriptor now. */
705 	(*nfile)->name = filename;
706 	(*nfile)->lineno = 1;
707 	(*nfile)->ungetsize = 16;
708 	(*nfile)->ungetbuf = malloc((*nfile)->ungetsize);
709 	if ((*nfile)->ungetbuf == NULL) {
710 		error = got_error_from_errno("malloc");
711 		fclose((*nfile)->stream);
712 		free((*nfile));
713 		return error;
714 	}
715 	return NULL;
716 }
717 
718 static const struct got_error*
719 new_remote(struct gotconfig_remote_repo **remote)
720 {
721 	const struct got_error *error = NULL;
722 
723 	*remote = calloc(1, sizeof(**remote));
724 	if (*remote == NULL)
725 		error = got_error_from_errno("calloc");
726 	return error;
727 }
728 
729 static const struct got_error*
730 new_fetch_config(struct fetch_config **fetch_config)
731 {
732 	const struct got_error *error = NULL;
733 
734 	*fetch_config = calloc(1, sizeof(**fetch_config));
735 	if (*fetch_config == NULL)
736 		error = got_error_from_errno("calloc");
737 	return error;
738 }
739 
740 static const struct got_error*
741 new_send_config(struct send_config **send_config)
742 {
743 	const struct got_error *error = NULL;
744 
745 	*send_config = calloc(1, sizeof(**send_config));
746 	if (*send_config == NULL)
747 		error = got_error_from_errno("calloc");
748 	return error;
749 }
750 
751 static void
752 closefile(struct file *file)
753 {
754 	fclose(file->stream);
755 	free(file->ungetbuf);
756 	free(file);
757 }
758 
759 const struct got_error *
760 gotconfig_parse(struct gotconfig **conf, const char *filename, int *fd)
761 {
762 	const struct got_error *err = NULL;
763 	struct sym	*sym, *next;
764 
765 	*conf = NULL;
766 
767 	err = newfile(&file, filename, fd);
768 	if (err)
769 		return err;
770 
771 	TAILQ_INIT(&gotconfig.remotes);
772 
773 	yyparse();
774 	closefile(file);
775 
776 	/* Free macros and check which have not been used. */
777 	TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
778 		if (!sym->persist) {
779 			free(sym->nam);
780 			free(sym->val);
781 			TAILQ_REMOVE(&symhead, sym, entry);
782 			free(sym);
783 		}
784 	}
785 
786 	if (gerror == NULL)
787 		*conf = &gotconfig;
788 	return gerror;
789 }
790 
791 static void
792 free_fetch_config(struct fetch_config *fetch_config)
793 {
794 	free(remote->fetch_config->repository);
795 	free(remote->fetch_config->server);
796 	free(remote->fetch_config->protocol);
797 	free(remote->fetch_config);
798 }
799 
800 static void
801 free_send_config(struct send_config *send_config)
802 {
803 	free(remote->send_config->repository);
804 	free(remote->send_config->server);
805 	free(remote->send_config->protocol);
806 	free(remote->send_config);
807 }
808 
809 void
810 gotconfig_free(struct gotconfig *conf)
811 {
812 	struct gotconfig_remote_repo *remote;
813 
814 	free(conf->author);
815 	free(conf->allowed_signers_file);
816 	free(conf->revoked_signers_file);
817 	free(conf->signer_id);
818 	while (!TAILQ_EMPTY(&conf->remotes)) {
819 		remote = TAILQ_FIRST(&conf->remotes);
820 		TAILQ_REMOVE(&conf->remotes, remote, entry);
821 		if (remote->fetch_config != NULL)
822 			free_fetch_config(remote->fetch_config);
823 		if (remote->send_config != NULL)
824 			free_send_config(remote->send_config);
825 		free(remote->name);
826 		free(remote->repository);
827 		free(remote->server);
828 		free(remote->protocol);
829 		free(remote);
830 	}
831 }
832 
833 int
834 symset(const char *nam, const char *val, int persist)
835 {
836 	struct sym	*sym;
837 
838 	TAILQ_FOREACH(sym, &symhead, entry) {
839 		if (strcmp(nam, sym->nam) == 0)
840 			break;
841 	}
842 
843 	if (sym != NULL) {
844 		if (sym->persist == 1)
845 			return (0);
846 		else {
847 			free(sym->nam);
848 			free(sym->val);
849 			TAILQ_REMOVE(&symhead, sym, entry);
850 			free(sym);
851 		}
852 	}
853 	sym = calloc(1, sizeof(*sym));
854 	if (sym == NULL)
855 		return (-1);
856 
857 	sym->nam = strdup(nam);
858 	if (sym->nam == NULL) {
859 		free(sym);
860 		return (-1);
861 	}
862 	sym->val = strdup(val);
863 	if (sym->val == NULL) {
864 		free(sym->nam);
865 		free(sym);
866 		return (-1);
867 	}
868 	sym->used = 0;
869 	sym->persist = persist;
870 	TAILQ_INSERT_TAIL(&symhead, sym, entry);
871 	return (0);
872 }
873 
874 int
875 cmdline_symset(char *s)
876 {
877 	char	*sym, *val;
878 	int	ret;
879 	size_t	len;
880 
881 	val = strrchr(s, '=');
882 	if (val == NULL)
883 		return (-1);
884 
885 	len = strlen(s) - strlen(val) + 1;
886 	sym = malloc(len);
887 	if (sym == NULL)
888 		errx(1, "cmdline_symset: malloc");
889 
890 	strlcpy(sym, s, len);
891 
892 	ret = symset(sym, val + 1, 1);
893 	free(sym);
894 
895 	return (ret);
896 }
897 
898 char *
899 symget(const char *nam)
900 {
901 	struct sym	*sym;
902 
903 	TAILQ_FOREACH(sym, &symhead, entry) {
904 		if (strcmp(nam, sym->nam) == 0) {
905 			sym->used = 1;
906 			return (sym->val);
907 		}
908 	}
909 	return (NULL);
910 }
911 
912 static int
913 atoul(char *s, u_long *ulvalp)
914 {
915 	u_long	 ulval;
916 	char	*ep;
917 
918 	errno = 0;
919 	ulval = strtoul(s, &ep, 0);
920 	if (s[0] == '\0' || *ep != '\0')
921 		return (-1);
922 	if (errno == ERANGE && ulval == ULONG_MAX)
923 		return (-1);
924 	*ulvalp = ulval;
925 	return (0);
926 }