parse.y revision 290931 
1/*	$OpenBSD: parse.y,v 1.18 2015/01/16 06:40:22 deraadt Exp $	*/
2/*	$FreeBSD: head/usr.sbin/ypldap/parse.y 290931 2015-11-16 16:48:43Z rodrigc $ */
3
4/*
5 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
6 * Copyright (c) 2007, 2008 Reyk Floeter <reyk@openbsd.org>
7 * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
8 * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
9 * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
10 * Copyright (c) 2001 Markus Friedl.  All rights reserved.
11 * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
12 * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
13 *
14 * Permission to use, copy, modify, and distribute this software for any
15 * purpose with or without fee is hereby granted, provided that the above
16 * copyright notice and this permission notice appear in all copies.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
19 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
21 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
22 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
23 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
24 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 */
26
27%{
28#include <sys/types.h>
29#include <sys/time.h>
30#include <sys/queue.h>
31#include <sys/tree.h>
32#include <sys/socket.h>
33#include <sys/stat.h>
34
35#include <netinet/in.h>
36#include <arpa/inet.h>
37
38#include <ctype.h>
39#include <err.h>
40#include <errno.h>
41#include <event.h>
42#include <fcntl.h>
43#include <limits.h>
44#include <netdb.h>
45#include <pwd.h>
46#include <stdarg.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <string.h>
50#include <syslog.h>
51#include <unistd.h>
52
53#include "ypldap.h"
54
55TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
56static struct file {
57	TAILQ_ENTRY(file)	 entry;
58	FILE			*stream;
59	char			*name;
60	int			 lineno;
61	int			 errors;
62} *file, *topfile;
63struct file	*pushfile(const char *, int);
64int		 popfile(void);
65int		 check_file_secrecy(int, const char *);
66int		 yyparse(void);
67int		 yylex(void);
68int		 yyerror(const char *, ...)
69    __attribute__((__format__ (printf, 1, 2)))
70    __attribute__((__nonnull__ (1)));
71int		 kw_cmp(const void *, const void *);
72int		 lookup(char *);
73int		 lgetc(int);
74int		 lungetc(int);
75int		 findeol(void);
76
77TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
78struct sym {
79	TAILQ_ENTRY(sym)	 entry;
80	int			 used;
81	int			 persist;
82	char			*nam;
83	char			*val;
84};
85int		 symset(const char *, const char *, int);
86char		*symget(const char *);
87
88struct env		*conf = NULL;
89struct idm		*idm = NULL;
90static int		 errors = 0;
91
92typedef struct {
93	union {
94		int64_t		 number;
95		char		*string;
96	} v;
97	int lineno;
98} YYSTYPE;
99
100%}
101
102%token	SERVER FILTER ATTRIBUTE BASEDN BINDDN GROUPDN BINDCRED MAPS CHANGE DOMAIN PROVIDE
103%token	USER GROUP TO EXPIRE HOME SHELL GECOS UID GID INTERVAL
104%token	PASSWD NAME FIXED LIST GROUPNAME GROUPPASSWD GROUPGID MAP
105%token	INCLUDE DIRECTORY CLASS PORT ERROR GROUPMEMBERS
106%token	<v.string>	STRING
107%token  <v.number>	NUMBER
108%type	<v.number>	opcode attribute
109%type	<v.string>	port
110
111%%
112
113grammar		: /* empty */
114		| grammar '\n'
115		| grammar include '\n'
116		| grammar varset '\n'
117		| grammar directory '\n'
118		| grammar main '\n'
119		| grammar error '\n'			{ file->errors++; }
120		;
121
122nl		: '\n' optnl
123		;
124
125optnl		: '\n' optnl
126		| /* empty */
127		;
128
129
130include		: INCLUDE STRING			{
131			struct file	*nfile;
132
133			if ((nfile = pushfile($2, 0)) == NULL) {
134				yyerror("failed to include file %s", $2);
135				free($2);
136				YYERROR;
137			}
138			free($2);
139
140			file = nfile;
141			lungetc('\n');
142		}
143		;
144
145varset		: STRING '=' STRING			{
146			if (symset($1, $3, 0) == -1)
147				fatal("cannot store variable");
148			free($1);
149			free($3);
150		}
151		;
152
153port		: /* empty */	{ $$ = NULL; }
154		| PORT STRING	{ $$ = $2; }
155		;
156
157opcode		: GROUP					{ $$ = 0; }
158		| PASSWD				{ $$ = 1; }
159		;
160
161
162attribute	: NAME					{ $$ = 0; }
163		| PASSWD				{ $$ = 1; }
164		| UID					{ $$ = 2; }
165		| GID					{ $$ = 3; }
166		| CLASS					{ $$ = 4; }
167		| CHANGE				{ $$ = 5; }
168		| EXPIRE				{ $$ = 6; }
169		| GECOS					{ $$ = 7; }
170		| HOME					{ $$ = 8; }
171		| SHELL					{ $$ = 9; }
172		| GROUPNAME				{ $$ = 10; }
173		| GROUPPASSWD				{ $$ = 11; }
174		| GROUPGID				{ $$ = 12; }
175		| GROUPMEMBERS				{ $$ = 13; }
176		;
177
178diropt		: BINDDN STRING				{
179			idm->idm_flags |= F_NEEDAUTH;
180			if (strlcpy(idm->idm_binddn, $2,
181			    sizeof(idm->idm_binddn)) >=
182			    sizeof(idm->idm_binddn)) {
183				yyerror("directory binddn truncated");
184				free($2);
185				YYERROR;
186			}
187			free($2);
188		}
189		| BINDCRED STRING			{
190			idm->idm_flags |= F_NEEDAUTH;
191			if (strlcpy(idm->idm_bindcred, $2,
192			    sizeof(idm->idm_bindcred)) >=
193			    sizeof(idm->idm_bindcred)) {
194				yyerror("directory bindcred truncated");
195				free($2);
196				YYERROR;
197			}
198			free($2);
199		}
200		| BASEDN STRING			{
201			if (strlcpy(idm->idm_basedn, $2,
202			    sizeof(idm->idm_basedn)) >=
203			    sizeof(idm->idm_basedn)) {
204				yyerror("directory basedn truncated");
205				free($2);
206				YYERROR;
207			}
208			free($2);
209		}
210		| GROUPDN STRING		{
211			if(strlcpy(idm->idm_groupdn, $2,
212			    sizeof(idm->idm_groupdn)) >=
213			    sizeof(idm->idm_groupdn)) {
214				yyerror("directory groupdn truncated");
215				free($2);
216				YYERROR;
217			}
218			free($2);
219		}
220		| opcode FILTER STRING			{
221			if (strlcpy(idm->idm_filters[$1], $3,
222			    sizeof(idm->idm_filters[$1])) >=
223			    sizeof(idm->idm_filters[$1])) {
224				yyerror("filter truncated");
225				free($3);
226				YYERROR;
227			}
228			free($3);
229		}
230		| ATTRIBUTE attribute MAPS TO STRING	{
231			if (strlcpy(idm->idm_attrs[$2], $5,
232			    sizeof(idm->idm_attrs[$2])) >=
233			    sizeof(idm->idm_attrs[$2])) {
234				yyerror("attribute truncated");
235				free($5);
236				YYERROR;
237			}
238			free($5);
239		}
240		| FIXED ATTRIBUTE attribute STRING	{
241			if (strlcpy(idm->idm_attrs[$3], $4,
242			    sizeof(idm->idm_attrs[$3])) >=
243			    sizeof(idm->idm_attrs[$3])) {
244				yyerror("attribute truncated");
245				free($4);
246				YYERROR;
247			}
248			idm->idm_flags |= F_FIXED_ATTR($3);
249			free($4);
250		}
251		| LIST attribute MAPS TO STRING	{
252			if (strlcpy(idm->idm_attrs[$2], $5,
253			    sizeof(idm->idm_attrs[$2])) >=
254			    sizeof(idm->idm_attrs[$2])) {
255				yyerror("attribute truncated");
256				free($5);
257				YYERROR;
258			}
259			idm->idm_list |= F_LIST($2);
260			free($5);
261		}
262		;
263
264directory	: DIRECTORY STRING port {
265			if ((idm = calloc(1, sizeof(*idm))) == NULL)
266				fatal(NULL);
267			idm->idm_id = conf->sc_maxid++;
268
269			if (strlcpy(idm->idm_name, $2,
270			    sizeof(idm->idm_name)) >=
271			    sizeof(idm->idm_name)) {
272				yyerror("attribute truncated");
273				free($2);
274				YYERROR;
275			}
276
277			free($2);
278		} '{' optnl diropts '}'			{
279			TAILQ_INSERT_TAIL(&conf->sc_idms, idm, idm_entry);
280			idm = NULL;
281		}
282		;
283
284main		: INTERVAL NUMBER			{
285			conf->sc_conf_tv.tv_sec = $2;
286			conf->sc_conf_tv.tv_usec = 0;
287		}
288		| DOMAIN STRING				{
289			if (strlcpy(conf->sc_domainname, $2,
290			    sizeof(conf->sc_domainname)) >=
291			    sizeof(conf->sc_domainname)) {
292				yyerror("domainname truncated");
293				free($2);
294				YYERROR;
295			}
296			free($2);
297		}
298		| PROVIDE MAP STRING			{
299			if (strcmp($3, "passwd.byname") == 0)
300				conf->sc_flags |= YPMAP_PASSWD_BYNAME;
301			else if (strcmp($3, "passwd.byuid") == 0)
302				conf->sc_flags |= YPMAP_PASSWD_BYUID;
303			else if (strcmp($3, "master.passwd.byname") == 0)
304				conf->sc_flags |= YPMAP_MASTER_PASSWD_BYNAME;
305			else if (strcmp($3, "master.passwd.byuid") == 0)
306				conf->sc_flags |= YPMAP_MASTER_PASSWD_BYUID;
307			else if (strcmp($3, "group.byname") == 0)
308				conf->sc_flags |= YPMAP_GROUP_BYNAME;
309			else if (strcmp($3, "group.bygid") == 0)
310				conf->sc_flags |= YPMAP_GROUP_BYGID;
311			else if (strcmp($3, "netid.byname") == 0)
312				conf->sc_flags |= YPMAP_NETID_BYNAME;
313			else {
314				yyerror("unsupported map type: %s", $3);
315				free($3);
316				YYERROR;
317			}
318			free($3);
319		}
320		;
321
322diropts		: diropts diropt nl
323		| diropt optnl
324		;
325
326%%
327
328struct keywords {
329	const char	*k_name;
330	int		 k_val;
331};
332
333int
334yyerror(const char *fmt, ...)
335{
336	va_list		 ap;
337	char		*msg;
338
339	file->errors++;
340	va_start(ap, fmt);
341	if (vasprintf(&msg, fmt, ap) == -1)
342		fatalx("yyerror vasprintf");
343	va_end(ap);
344	logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
345	free(msg);
346	return (0);
347}
348
349int
350kw_cmp(const void *k, const void *e)
351{
352	return (strcmp(k, ((const struct keywords *)e)->k_name));
353}
354
355int
356lookup(char *s)
357{
358	/* this has to be sorted always */
359	static const struct keywords keywords[] = {
360		{ "attribute",		ATTRIBUTE },
361		{ "basedn",		BASEDN },
362		{ "bindcred",		BINDCRED },
363		{ "binddn",		BINDDN },
364		{ "change",		CHANGE },
365		{ "class",		CLASS },
366		{ "directory",		DIRECTORY },
367		{ "domain",		DOMAIN },
368		{ "expire",		EXPIRE },
369		{ "filter",		FILTER },
370		{ "fixed",		FIXED },
371		{ "gecos",		GECOS },
372		{ "gid",		GID },
373		{ "group",		GROUP },
374		{ "groupdn",		GROUPDN },
375		{ "groupgid",		GROUPGID },
376		{ "groupmembers",	GROUPMEMBERS },
377		{ "groupname",		GROUPNAME },
378		{ "grouppasswd",	GROUPPASSWD },
379		{ "home",		HOME },
380		{ "include",		INCLUDE },
381		{ "interval",		INTERVAL },
382		{ "list",		LIST },
383		{ "map",		MAP },
384		{ "maps",		MAPS },
385		{ "name",		NAME },
386		{ "passwd",		PASSWD },
387		{ "port",		PORT },
388		{ "provide",		PROVIDE },
389		{ "server",		SERVER },
390		{ "shell",		SHELL },
391		{ "to",			TO },
392		{ "uid",		UID },
393		{ "user",		USER },
394	};
395	const struct keywords	*p;
396
397	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
398	    sizeof(keywords[0]), kw_cmp);
399
400	if (p)
401		return (p->k_val);
402	else
403		return (STRING);
404}
405
406#define MAXPUSHBACK	128
407
408u_char	*parsebuf;
409int	 parseindex;
410u_char	 pushback_buffer[MAXPUSHBACK];
411int	 pushback_index = 0;
412
413int
414lgetc(int quotec)
415{
416	int		c, next;
417
418	if (parsebuf) {
419		/* Read character from the parsebuffer instead of input. */
420		if (parseindex >= 0) {
421			c = parsebuf[parseindex++];
422			if (c != '\0')
423				return (c);
424			parsebuf = NULL;
425		} else
426			parseindex++;
427	}
428
429	if (pushback_index)
430		return (pushback_buffer[--pushback_index]);
431
432	if (quotec) {
433		if ((c = getc(file->stream)) == EOF) {
434			yyerror("reached end of file while parsing "
435			    "quoted string");
436			if (file == topfile || popfile() == EOF)
437				return (EOF);
438			return (quotec);
439		}
440		return (c);
441	}
442
443	while ((c = getc(file->stream)) == '\\') {
444		next = getc(file->stream);
445		if (next != '\n') {
446			c = next;
447			break;
448		}
449		yylval.lineno = file->lineno;
450		file->lineno++;
451	}
452
453	while (c == EOF) {
454		if (file == topfile || popfile() == EOF)
455			return (EOF);
456		c = getc(file->stream);
457	}
458	return (c);
459}
460
461int
462lungetc(int c)
463{
464	if (c == EOF)
465		return (EOF);
466	if (parsebuf) {
467		parseindex--;
468		if (parseindex >= 0)
469			return (c);
470	}
471	if (pushback_index < MAXPUSHBACK-1)
472		return (pushback_buffer[pushback_index++] = c);
473	else
474		return (EOF);
475}
476
477int
478findeol(void)
479{
480	int	c;
481
482	parsebuf = NULL;
483
484	/* skip to either EOF or the first real EOL */
485	while (1) {
486		if (pushback_index)
487			c = pushback_buffer[--pushback_index];
488		else
489			c = lgetc(0);
490		if (c == '\n') {
491			file->lineno++;
492			break;
493		}
494		if (c == EOF)
495			break;
496	}
497	return (ERROR);
498}
499
500int
501yylex(void)
502{
503	u_char	 buf[8096];
504	u_char	*p, *val;
505	int	 quotec, next, c;
506	int	 token;
507
508top:
509	p = buf;
510	while ((c = lgetc(0)) == ' ' || c == '\t')
511		; /* nothing */
512
513	yylval.lineno = file->lineno;
514	if (c == '#')
515		while ((c = lgetc(0)) != '\n' && c != EOF)
516			; /* nothing */
517	if (c == '$' && parsebuf == NULL) {
518		while (1) {
519			if ((c = lgetc(0)) == EOF)
520				return (0);
521
522			if (p + 1 >= buf + sizeof(buf) - 1) {
523				yyerror("string too long");
524				return (findeol());
525			}
526			if (isalnum(c) || c == '_') {
527				*p++ = c;
528				continue;
529			}
530			*p = '\0';
531			lungetc(c);
532			break;
533		}
534		val = symget(buf);
535		if (val == NULL) {
536			yyerror("macro '%s' not defined", buf);
537			return (findeol());
538		}
539		parsebuf = val;
540		parseindex = 0;
541		goto top;
542	}
543
544	switch (c) {
545	case '\'':
546	case '"':
547		quotec = c;
548		while (1) {
549			if ((c = lgetc(quotec)) == EOF)
550				return (0);
551			if (c == '\n') {
552				file->lineno++;
553				continue;
554			} else if (c == '\\') {
555				if ((next = lgetc(quotec)) == EOF)
556					return (0);
557				if (next == quotec || c == ' ' || c == '\t')
558					c = next;
559				else if (next == '\n') {
560					file->lineno++;
561					continue;
562				} else
563					lungetc(next);
564			} else if (c == quotec) {
565				*p = '\0';
566				break;
567			} else if (c == '\0') {
568				yyerror("syntax error");
569				return (findeol());
570			}
571			if (p + 1 >= buf + sizeof(buf) - 1) {
572				yyerror("string too long");
573				return (findeol());
574			}
575			*p++ = c;
576		}
577		yylval.v.string = strdup(buf);
578		if (yylval.v.string == NULL)
579			err(1, "yylex: strdup");
580		return (STRING);
581	}
582
583#define allowed_to_end_number(x) \
584	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
585
586	if (c == '-' || isdigit(c)) {
587		do {
588			*p++ = c;
589			if ((unsigned)(p-buf) >= sizeof(buf)) {
590				yyerror("string too long");
591				return (findeol());
592			}
593		} while ((c = lgetc(0)) != EOF && isdigit(c));
594		lungetc(c);
595		if (p == buf + 1 && buf[0] == '-')
596			goto nodigits;
597		if (c == EOF || allowed_to_end_number(c)) {
598			const char *errstr = NULL;
599
600			*p = '\0';
601			yylval.v.number = strtonum(buf, LLONG_MIN,
602			    LLONG_MAX, &errstr);
603			if (errstr) {
604				yyerror("\"%s\" invalid number: %s",
605				    buf, errstr);
606				return (findeol());
607			}
608			return (NUMBER);
609		} else {
610nodigits:
611			while (p > buf + 1)
612				lungetc(*--p);
613			c = *--p;
614			if (c == '-')
615				return (c);
616		}
617	}
618
619#define allowed_in_string(x) \
620	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
621	x != '{' && x != '}' && x != '<' && x != '>' && \
622	x != '!' && x != '=' && x != '#' && \
623	x != ','))
624
625	if (isalnum(c) || c == ':' || c == '_') {
626		do {
627			*p++ = c;
628			if ((unsigned)(p-buf) >= sizeof(buf)) {
629				yyerror("string too long");
630				return (findeol());
631			}
632		} while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
633		lungetc(c);
634		*p = '\0';
635		if ((token = lookup(buf)) == STRING)
636			if ((yylval.v.string = strdup(buf)) == NULL)
637				err(1, "yylex: strdup");
638		return (token);
639	}
640	if (c == '\n') {
641		yylval.lineno = file->lineno;
642		file->lineno++;
643	}
644	if (c == EOF)
645		return (0);
646	return (c);
647}
648
649int
650check_file_secrecy(int fd, const char *fname)
651{
652	struct stat	st;
653
654	if (fstat(fd, &st)) {
655		log_warn("cannot stat %s", fname);
656		return (-1);
657	}
658	if (st.st_uid != 0 && st.st_uid != getuid()) {
659		log_warnx("%s: owner not root or current user", fname);
660		return (-1);
661	}
662	if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
663		log_warnx("%s: group writable or world read/writable", fname);
664		return (-1);
665	}
666	return (0);
667}
668
669struct file *
670pushfile(const char *name, int secret)
671{
672	struct file	*nfile;
673
674	if ((nfile = calloc(1, sizeof(struct file))) == NULL) {
675		log_warn("malloc");
676		return (NULL);
677	}
678	if ((nfile->name = strdup(name)) == NULL) {
679		log_warn("malloc");
680		free(nfile);
681		return (NULL);
682	}
683	if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
684		log_warn("%s", nfile->name);
685		free(nfile->name);
686		free(nfile);
687		return (NULL);
688	} else if (secret &&
689	    check_file_secrecy(fileno(nfile->stream), nfile->name)) {
690		fclose(nfile->stream);
691		free(nfile->name);
692		free(nfile);
693		return (NULL);
694	}
695	nfile->lineno = 1;
696	TAILQ_INSERT_TAIL(&files, nfile, entry);
697	return (nfile);
698}
699
700int
701popfile(void)
702{
703	struct file	*prev;
704
705	if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
706		prev->errors += file->errors;
707
708	TAILQ_REMOVE(&files, file, entry);
709	fclose(file->stream);
710	free(file->name);
711	free(file);
712	file = prev;
713	return (file ? 0 : EOF);
714}
715
716int
717parse_config(struct env *x_conf, const char *filename, int opts)
718{
719	struct sym	*sym, *next;
720
721	conf = x_conf;
722	bzero(conf, sizeof(*conf));
723
724	TAILQ_INIT(&conf->sc_idms);
725	conf->sc_conf_tv.tv_sec = DEFAULT_INTERVAL;
726	conf->sc_conf_tv.tv_usec = 0;
727
728	errors = 0;
729
730	if ((file = pushfile(filename, 1)) == NULL) {
731		return (-1);
732	}
733	topfile = file;
734
735	/*
736	 * parse configuration
737	 */
738	setservent(1);
739	yyparse();
740	endservent();
741	errors = file->errors;
742	popfile();
743
744	/* Free macros and check which have not been used. */
745	for (sym = TAILQ_FIRST(&symhead); sym != NULL; sym = next) {
746		next = TAILQ_NEXT(sym, entry);
747		if ((opts & YPLDAP_OPT_VERBOSE) && !sym->used)
748			fprintf(stderr, "warning: macro '%s' not "
749			    "used\n", sym->nam);
750		if (!sym->persist) {
751			free(sym->nam);
752			free(sym->val);
753			TAILQ_REMOVE(&symhead, sym, entry);
754			free(sym);
755		}
756	}
757
758	if (errors) {
759		return (-1);
760	}
761
762	return (0);
763}
764
765int
766symset(const char *nam, const char *val, int persist)
767{
768	struct sym	*sym;
769
770	for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
771	    sym = TAILQ_NEXT(sym, entry))
772		;	/* nothing */
773
774	if (sym != NULL) {
775		if (sym->persist == 1)
776			return (0);
777		else {
778			free(sym->nam);
779			free(sym->val);
780			TAILQ_REMOVE(&symhead, sym, entry);
781			free(sym);
782		}
783	}
784	if ((sym = calloc(1, sizeof(*sym))) == NULL)
785		return (-1);
786
787	sym->nam = strdup(nam);
788	if (sym->nam == NULL) {
789		free(sym);
790		return (-1);
791	}
792	sym->val = strdup(val);
793	if (sym->val == NULL) {
794		free(sym->nam);
795		free(sym);
796		return (-1);
797	}
798	sym->used = 0;
799	sym->persist = persist;
800	TAILQ_INSERT_TAIL(&symhead, sym, entry);
801	return (0);
802}
803
804int
805cmdline_symset(char *s)
806{
807	char	*sym, *val;
808	int	ret;
809	size_t	len;
810
811	if ((val = strrchr(s, '=')) == NULL)
812		return (-1);
813
814	len = strlen(s) - strlen(val) + 1;
815	if ((sym = malloc(len)) == NULL)
816		errx(1, "cmdline_symset: malloc");
817
818	(void)strlcpy(sym, s, len);
819
820	ret = symset(sym, val + 1, 1);
821	free(sym);
822
823	return (ret);
824}
825
826char *
827symget(const char *nam)
828{
829	struct sym	*sym;
830
831	TAILQ_FOREACH(sym, &symhead, entry)
832		if (strcmp(nam, sym->nam) == 0) {
833			sym->used = 1;
834			return (sym->val);
835		}
836	return (NULL);
837}
838