config.c revision 268896 
1/*-
2 * Copyright (c) 2014 Baptiste Daroussin <bapt@FreeBSD.org>
3 * Copyright (c) 2013 Bryan Drewery <bdrewery@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: stable/10/usr.sbin/pkg/config.c 268896 2014-07-19 23:44:57Z bapt $");
30
31#include <sys/param.h>
32#include <sys/queue.h>
33#include <sys/sbuf.h>
34#include <sys/elf_common.h>
35#include <sys/endian.h>
36#include <sys/types.h>
37
38#include <assert.h>
39#include <dirent.h>
40#include <ucl.h>
41#include <ctype.h>
42#include <err.h>
43#include <errno.h>
44#include <fcntl.h>
45#include <gelf.h>
46#include <inttypes.h>
47#include <paths.h>
48#include <stdbool.h>
49#include <string.h>
50#include <unistd.h>
51
52#include "elf_tables.h"
53#include "config.h"
54
55#define roundup2(x, y)	(((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
56
57struct config_value {
58       char *value;
59       STAILQ_ENTRY(config_value) next;
60};
61
62struct config_entry {
63	uint8_t type;
64	const char *key;
65	const char *val;
66	char *value;
67	STAILQ_HEAD(, config_value) *list;
68	bool envset;
69	bool main_only;				/* Only set in pkg.conf. */
70};
71
72static struct config_entry c[] = {
73	[PACKAGESITE] = {
74		PKG_CONFIG_STRING,
75		"PACKAGESITE",
76		URL_SCHEME_PREFIX "http://pkg.FreeBSD.org/${ABI}/latest",
77		NULL,
78		NULL,
79		false,
80		false,
81	},
82	[ABI] = {
83		PKG_CONFIG_STRING,
84		"ABI",
85		NULL,
86		NULL,
87		NULL,
88		false,
89		true,
90	},
91	[MIRROR_TYPE] = {
92		PKG_CONFIG_STRING,
93		"MIRROR_TYPE",
94		"SRV",
95		NULL,
96		NULL,
97		false,
98		false,
99	},
100	[ASSUME_ALWAYS_YES] = {
101		PKG_CONFIG_BOOL,
102		"ASSUME_ALWAYS_YES",
103		"NO",
104		NULL,
105		NULL,
106		false,
107		true,
108	},
109	[SIGNATURE_TYPE] = {
110		PKG_CONFIG_STRING,
111		"SIGNATURE_TYPE",
112		NULL,
113		NULL,
114		NULL,
115		false,
116		false,
117	},
118	[FINGERPRINTS] = {
119		PKG_CONFIG_STRING,
120		"FINGERPRINTS",
121		NULL,
122		NULL,
123		NULL,
124		false,
125		false,
126	},
127	[REPOS_DIR] = {
128		PKG_CONFIG_LIST,
129		"REPOS_DIR",
130		NULL,
131		NULL,
132		NULL,
133		false,
134		true,
135	},
136};
137
138static const char *
139elf_corres_to_string(struct _elf_corres *m, int e)
140{
141	int i;
142
143	for (i = 0; m[i].string != NULL; i++)
144		if (m[i].elf_nb == e)
145			return (m[i].string);
146
147	return ("unknown");
148}
149
150static const char *
151aeabi_parse_arm_attributes(void *data, size_t length)
152{
153	uint32_t sect_len;
154	uint8_t *section = data;
155
156#define	MOVE(len) do {            \
157	assert(length >= (len));  \
158	section += (len);         \
159	length -= (len);          \
160} while (0)
161
162	if (length == 0 || *section != 'A')
163		return (NULL);
164
165	MOVE(1);
166
167	/* Read the section length */
168	if (length < sizeof(sect_len))
169		return (NULL);
170
171	memcpy(&sect_len, section, sizeof(sect_len));
172
173	/*
174	 * The section length should be no longer than the section it is within
175	 */
176	if (sect_len > length)
177		return (NULL);
178
179	MOVE(sizeof(sect_len));
180
181	/* Skip the vendor name */
182	while (length != 0) {
183		if (*section == '\0')
184			break;
185		MOVE(1);
186	}
187	if (length == 0)
188		return (NULL);
189	MOVE(1);
190
191	while (length != 0) {
192		uint32_t tag_length;
193
194	switch(*section) {
195	case 1: /* Tag_File */
196		MOVE(1);
197		if (length < sizeof(tag_length))
198			return (NULL);
199		memcpy(&tag_length, section, sizeof(tag_length));
200		break;
201	case 2: /* Tag_Section */
202	case 3: /* Tag_Symbol */
203	default:
204		return (NULL);
205	}
206	/* At least space for the tag and size */
207	if (tag_length <= 5)
208		return (NULL);
209	tag_length--;
210	/* Check the tag fits */
211	if (tag_length > length)
212		return (NULL);
213
214#define  MOVE_TAG(len) do {           \
215	assert(tag_length >= (len));  \
216	MOVE(len);                    \
217	tag_length -= (len);          \
218} while(0)
219
220		MOVE(sizeof(tag_length));
221		tag_length -= sizeof(tag_length);
222
223		while (tag_length != 0) {
224			uint8_t tag;
225
226			assert(tag_length >= length);
227
228			tag = *section;
229			MOVE_TAG(1);
230
231			/*
232			 * These tag values come from:
233			 *
234			 * Addenda to, and Errata in, the ABI for the
235			 * ARM Architecture. Release 2.08, section 2.3.
236			 */
237			if (tag == 6) { /* == Tag_CPU_arch */
238				uint8_t val;
239
240				val = *section;
241				/*
242				 * We don't support values that require
243				 * more than one byte.
244				 */
245				if (val & (1 << 7))
246					return (NULL);
247
248				/* We have an ARMv4 or ARMv5 */
249				if (val <= 5)
250					return ("arm");
251				else /* We have an ARMv6+ */
252					return ("armv6");
253			} else if (tag == 4 || tag == 5 || tag == 32 ||
254			    tag == 65 || tag == 67) {
255				while (*section != '\0' && length != 0)
256					MOVE_TAG(1);
257				if (tag_length == 0)
258					return (NULL);
259				/* Skip the last byte */
260				MOVE_TAG(1);
261			} else if ((tag >= 7 && tag <= 31) || tag == 34 ||
262			    tag == 36 || tag == 38 || tag == 42 || tag == 44 ||
263			    tag == 64 || tag == 66 || tag == 68 || tag == 70) {
264				/* Skip the uleb128 data */
265				while (*section & (1 << 7) && length != 0)
266					MOVE_TAG(1);
267				if (tag_length == 0)
268					return (NULL);
269				/* Skip the last byte */
270				MOVE_TAG(1);
271			} else
272				return (NULL);
273#undef MOVE_TAG
274		}
275
276		break;
277	}
278	return (NULL);
279#undef MOVE
280}
281
282static int
283pkg_get_myabi(char *dest, size_t sz)
284{
285	Elf *elf;
286	Elf_Data *data;
287	Elf_Note note;
288	Elf_Scn *scn;
289	char *src, *osname;
290	const char *arch, *abi, *fpu, *endian_corres_str;
291	const char *wordsize_corres_str;
292	GElf_Ehdr elfhdr;
293	GElf_Shdr shdr;
294	int fd, i, ret;
295	uint32_t version;
296
297	version = 0;
298	ret = -1;
299	scn = NULL;
300	abi = NULL;
301
302	if (elf_version(EV_CURRENT) == EV_NONE) {
303		warnx("ELF library initialization failed: %s",
304		    elf_errmsg(-1));
305		return (-1);
306	}
307
308	if ((fd = open(_PATH_BSHELL, O_RDONLY)) < 0) {
309		warn("open()");
310		return (-1);
311	}
312
313	if ((elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) {
314		ret = -1;
315		warnx("elf_begin() failed: %s.", elf_errmsg(-1));
316		goto cleanup;
317	}
318
319	if (gelf_getehdr(elf, &elfhdr) == NULL) {
320		ret = -1;
321		warn("getehdr() failed: %s.", elf_errmsg(-1));
322		goto cleanup;
323	}
324	while ((scn = elf_nextscn(elf, scn)) != NULL) {
325		if (gelf_getshdr(scn, &shdr) != &shdr) {
326			ret = -1;
327			warn("getshdr() failed: %s.", elf_errmsg(-1));
328			goto cleanup;
329		}
330
331		if (shdr.sh_type == SHT_NOTE)
332			break;
333	}
334
335	if (scn == NULL) {
336		ret = -1;
337		warn("failed to get the note section");
338		goto cleanup;
339	}
340
341	data = elf_getdata(scn, NULL);
342	src = data->d_buf;
343	for (;;) {
344		memcpy(&note, src, sizeof(Elf_Note));
345		src += sizeof(Elf_Note);
346		if (note.n_type == NT_VERSION)
347			break;
348		src += note.n_namesz + note.n_descsz;
349	}
350	osname = src;
351	src += roundup2(note.n_namesz, 4);
352	if (elfhdr.e_ident[EI_DATA] == ELFDATA2MSB)
353		version = be32dec(src);
354	else
355		version = le32dec(src);
356
357	for (i = 0; osname[i] != '\0'; i++)
358		osname[i] = (char)tolower(osname[i]);
359
360	wordsize_corres_str = elf_corres_to_string(wordsize_corres,
361	    (int)elfhdr.e_ident[EI_CLASS]);
362
363	arch = elf_corres_to_string(mach_corres, (int) elfhdr.e_machine);
364
365	snprintf(dest, sz, "%s:%d",
366	    osname, version / 100000);
367
368	ret = 0;
369
370	switch (elfhdr.e_machine) {
371	case EM_ARM:
372		endian_corres_str = elf_corres_to_string(endian_corres,
373		    (int)elfhdr.e_ident[EI_DATA]);
374
375		/* FreeBSD doesn't support the hard-float ABI yet */
376		fpu = "softfp";
377		if ((elfhdr.e_flags & 0xFF000000) != 0) {
378			const char *sh_name = NULL;
379			size_t shstrndx;
380
381			/* This is an EABI file, the conformance level is set */
382			abi = "eabi";
383			/* Find which TARGET_ARCH we are building for. */
384			elf_getshdrstrndx(elf, &shstrndx);
385			while ((scn = elf_nextscn(elf, scn)) != NULL) {
386				sh_name = NULL;
387				if (gelf_getshdr(scn, &shdr) != &shdr) {
388					scn = NULL;
389					break;
390				}
391
392				sh_name = elf_strptr(elf, shstrndx,
393				    shdr.sh_name);
394				if (sh_name == NULL)
395					continue;
396				if (strcmp(".ARM.attributes", sh_name) == 0)
397					break;
398			}
399			if (scn != NULL && sh_name != NULL) {
400				data = elf_getdata(scn, NULL);
401				/*
402				 * Prior to FreeBSD 10.0 libelf would return
403				 * NULL from elf_getdata on the .ARM.attributes
404				 * section. As this was the first release to
405				 * get armv6 support assume a NULL value means
406				 * arm.
407				 *
408				 * This assumption can be removed when 9.x
409				 * is unsupported.
410				 */
411				if (data != NULL) {
412					arch = aeabi_parse_arm_attributes(
413					    data->d_buf, data->d_size);
414					if (arch == NULL) {
415						ret = 1;
416						warn("unknown ARM ARCH");
417						goto cleanup;
418					}
419				}
420			} else {
421				ret = 1;
422				warn("Unable to find the .ARM.attributes "
423				    "section");
424				goto cleanup;
425			}
426		} else if (elfhdr.e_ident[EI_OSABI] != ELFOSABI_NONE) {
427			/*
428			 * EABI executables all have this field set to
429			 * ELFOSABI_NONE, therefore it must be an oabi file.
430			 */
431			abi = "oabi";
432		} else {
433			ret = 1;
434			warn("unknown ARM ABI");
435			goto cleanup;
436		}
437		snprintf(dest + strlen(dest), sz - strlen(dest),
438		    ":%s:%s:%s:%s:%s", arch, wordsize_corres_str,
439		    endian_corres_str, abi, fpu);
440		break;
441	case EM_MIPS:
442		/*
443		 * this is taken from binutils sources:
444		 * include/elf/mips.h
445		 * mapping is figured out from binutils:
446		 * gas/config/tc-mips.c
447		 */
448		switch (elfhdr.e_flags & EF_MIPS_ABI) {
449		case E_MIPS_ABI_O32:
450			abi = "o32";
451			break;
452		case E_MIPS_ABI_N32:
453			abi = "n32";
454			break;
455		default:
456			if (elfhdr.e_ident[EI_DATA] ==
457			    ELFCLASS32)
458				abi = "o32";
459			else if (elfhdr.e_ident[EI_DATA] ==
460			    ELFCLASS64)
461				abi = "n64";
462			break;
463		}
464		endian_corres_str = elf_corres_to_string(endian_corres,
465		    (int)elfhdr.e_ident[EI_DATA]);
466
467		snprintf(dest + strlen(dest), sz - strlen(dest), ":%s:%s:%s:%s",
468		    arch, wordsize_corres_str, endian_corres_str, abi);
469		break;
470	default:
471		snprintf(dest + strlen(dest), sz - strlen(dest), ":%s:%s",
472		    arch, wordsize_corres_str);
473	}
474
475cleanup:
476	if (elf != NULL)
477		elf_end(elf);
478
479	close(fd);
480	return (ret);
481}
482
483static void
484subst_packagesite(const char *abi)
485{
486	struct sbuf *newval;
487	const char *variable_string;
488	const char *oldval;
489
490	if (c[PACKAGESITE].value != NULL)
491		oldval = c[PACKAGESITE].value;
492	else
493		oldval = c[PACKAGESITE].val;
494
495	if ((variable_string = strstr(oldval, "${ABI}")) == NULL)
496		return;
497
498	newval = sbuf_new_auto();
499	sbuf_bcat(newval, oldval, variable_string - oldval);
500	sbuf_cat(newval, abi);
501	sbuf_cat(newval, variable_string + strlen("${ABI}"));
502	sbuf_finish(newval);
503
504	free(c[PACKAGESITE].value);
505	c[PACKAGESITE].value = strdup(sbuf_data(newval));
506}
507
508static int
509boolstr_to_bool(const char *str)
510{
511	if (str != NULL && (strcasecmp(str, "true") == 0 ||
512	    strcasecmp(str, "yes") == 0 || strcasecmp(str, "on") == 0 ||
513	    str[0] == '1'))
514		return (true);
515
516	return (false);
517}
518
519static void
520config_parse(const ucl_object_t *obj, pkg_conf_file_t conftype)
521{
522	struct sbuf *buf = sbuf_new_auto();
523	const ucl_object_t *cur, *seq;
524	ucl_object_iter_t it = NULL, itseq = NULL;
525	struct config_entry *temp_config;
526	struct config_value *cv;
527	const char *key;
528	int i;
529	size_t j;
530
531	/* Temporary config for configs that may be disabled. */
532	temp_config = calloc(CONFIG_SIZE, sizeof(struct config_entry));
533
534	while ((cur = ucl_iterate_object(obj, &it, true))) {
535		key = ucl_object_key(cur);
536		if (key == NULL)
537			continue;
538		sbuf_clear(buf);
539
540		if (conftype == CONFFILE_PKG) {
541			for (j = 0; j < strlen(key); ++j)
542				sbuf_putc(buf, key[j]);
543			sbuf_finish(buf);
544		} else if (conftype == CONFFILE_REPO) {
545			if (strcasecmp(key, "url") == 0)
546				sbuf_cpy(buf, "PACKAGESITE");
547			else if (strcasecmp(key, "mirror_type") == 0)
548				sbuf_cpy(buf, "MIRROR_TYPE");
549			else if (strcasecmp(key, "signature_type") == 0)
550				sbuf_cpy(buf, "SIGNATURE_TYPE");
551			else if (strcasecmp(key, "fingerprints") == 0)
552				sbuf_cpy(buf, "FINGERPRINTS");
553			else if (strcasecmp(key, "enabled") == 0) {
554				if ((cur->type != UCL_BOOLEAN) ||
555				    !ucl_object_toboolean(cur))
556					goto cleanup;
557			} else
558				continue;
559			sbuf_finish(buf);
560		}
561
562		for (i = 0; i < CONFIG_SIZE; i++) {
563			if (strcmp(sbuf_data(buf), c[i].key) == 0)
564				break;
565		}
566
567		/* Silently skip unknown keys to be future compatible. */
568		if (i == CONFIG_SIZE)
569			continue;
570
571		/* env has priority over config file */
572		if (c[i].envset)
573			continue;
574
575		/* Parse sequence value ["item1", "item2"] */
576		switch (c[i].type) {
577		case PKG_CONFIG_LIST:
578			if (cur->type != UCL_ARRAY) {
579				warnx("Skipping invalid array "
580				    "value for %s.\n", c[i].key);
581				continue;
582			}
583			temp_config[i].list =
584			    malloc(sizeof(*temp_config[i].list));
585			STAILQ_INIT(temp_config[i].list);
586
587			while ((seq = ucl_iterate_object(cur, &itseq, true))) {
588				if (seq->type != UCL_STRING)
589					continue;
590				cv = malloc(sizeof(struct config_value));
591				cv->value =
592				    strdup(ucl_object_tostring(seq));
593				STAILQ_INSERT_TAIL(temp_config[i].list, cv,
594				    next);
595			}
596			break;
597		case PKG_CONFIG_BOOL:
598			temp_config[i].value =
599			    strdup(ucl_object_toboolean(cur) ? "yes" : "no");
600			break;
601		default:
602			/* Normal string value. */
603			temp_config[i].value = strdup(ucl_object_tostring(cur));
604			break;
605		}
606	}
607
608	/* Repo is enabled, copy over all settings from temp_config. */
609	for (i = 0; i < CONFIG_SIZE; i++) {
610		if (c[i].envset)
611			continue;
612		/* Prevent overriding ABI, ASSUME_ALWAYS_YES, etc. */
613		if (conftype != CONFFILE_PKG && c[i].main_only == true)
614			continue;
615		switch (c[i].type) {
616		case PKG_CONFIG_LIST:
617			c[i].list = temp_config[i].list;
618			break;
619		default:
620			c[i].value = temp_config[i].value;
621			break;
622		}
623	}
624
625cleanup:
626	free(temp_config);
627	sbuf_delete(buf);
628}
629
630/*-
631 * Parse new repo style configs in style:
632 * Name:
633 *   URL:
634 *   MIRROR_TYPE:
635 * etc...
636 */
637static void
638parse_repo_file(ucl_object_t *obj)
639{
640	ucl_object_iter_t it = NULL;
641	const ucl_object_t *cur;
642	const char *key;
643
644	while ((cur = ucl_iterate_object(obj, &it, true))) {
645		key = ucl_object_key(cur);
646
647		if (key == NULL)
648			continue;
649
650		if (cur->type != UCL_OBJECT)
651			continue;
652
653		config_parse(cur, CONFFILE_REPO);
654	}
655}
656
657
658static int
659read_conf_file(const char *confpath, pkg_conf_file_t conftype)
660{
661	struct ucl_parser *p;
662	ucl_object_t *obj = NULL;
663
664	p = ucl_parser_new(0);
665
666	if (!ucl_parser_add_file(p, confpath)) {
667		if (errno != ENOENT)
668			errx(EXIT_FAILURE, "Unable to parse configuration "
669			    "file %s: %s", confpath, ucl_parser_get_error(p));
670		ucl_parser_free(p);
671		/* no configuration present */
672		return (1);
673	}
674
675	obj = ucl_parser_get_object(p);
676	if (obj->type != UCL_OBJECT)
677		warnx("Invalid configuration format, ignoring the "
678		    "configuration file %s", confpath);
679	else {
680		if (conftype == CONFFILE_PKG)
681			config_parse(obj, conftype);
682		else if (conftype == CONFFILE_REPO)
683			parse_repo_file(obj);
684	}
685
686	ucl_object_unref(obj);
687	ucl_parser_free(p);
688
689	return (0);
690}
691
692static int
693load_repositories(const char *repodir)
694{
695	struct dirent *ent;
696	DIR *d;
697	char *p;
698	size_t n;
699	char path[MAXPATHLEN];
700	int ret;
701
702	ret = 0;
703
704	if ((d = opendir(repodir)) == NULL)
705		return (1);
706
707	while ((ent = readdir(d))) {
708		/* Trim out 'repos'. */
709		if ((n = strlen(ent->d_name)) <= 5)
710			continue;
711		p = &ent->d_name[n - 5];
712		if (strcmp(p, ".conf") == 0) {
713			snprintf(path, sizeof(path), "%s%s%s",
714			    repodir,
715			    repodir[strlen(repodir) - 1] == '/' ? "" : "/",
716			    ent->d_name);
717			if (access(path, F_OK) == 0 &&
718			    read_conf_file(path, CONFFILE_REPO)) {
719				ret = 1;
720				goto cleanup;
721			}
722		}
723	}
724
725cleanup:
726	closedir(d);
727
728	return (ret);
729}
730
731int
732config_init(void)
733{
734	char *val;
735	int i;
736	const char *localbase;
737	char *env_list_item;
738	char confpath[MAXPATHLEN];
739	struct config_value *cv;
740	char abi[BUFSIZ];
741
742	for (i = 0; i < CONFIG_SIZE; i++) {
743		val = getenv(c[i].key);
744		if (val != NULL) {
745			c[i].envset = true;
746			switch (c[i].type) {
747			case PKG_CONFIG_LIST:
748				/* Split up comma-separated items from env. */
749				c[i].list = malloc(sizeof(*c[i].list));
750				STAILQ_INIT(c[i].list);
751				for (env_list_item = strtok(val, ",");
752				    env_list_item != NULL;
753				    env_list_item = strtok(NULL, ",")) {
754					cv =
755					    malloc(sizeof(struct config_value));
756					cv->value =
757					    strdup(env_list_item);
758					STAILQ_INSERT_TAIL(c[i].list, cv,
759					    next);
760				}
761				break;
762			default:
763				c[i].val = val;
764				break;
765			}
766		}
767	}
768
769	/* Read LOCALBASE/etc/pkg.conf first. */
770	localbase = getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE;
771	snprintf(confpath, sizeof(confpath), "%s/etc/pkg.conf",
772	    localbase);
773
774	if (access(confpath, F_OK) == 0 && read_conf_file(confpath,
775	    CONFFILE_PKG))
776		goto finalize;
777
778	/* Then read in all repos from REPOS_DIR list of directories. */
779	if (c[REPOS_DIR].list == NULL) {
780		c[REPOS_DIR].list = malloc(sizeof(*c[REPOS_DIR].list));
781		STAILQ_INIT(c[REPOS_DIR].list);
782		cv = malloc(sizeof(struct config_value));
783		cv->value = strdup("/etc/pkg");
784		STAILQ_INSERT_TAIL(c[REPOS_DIR].list, cv, next);
785		cv = malloc(sizeof(struct config_value));
786		if (asprintf(&cv->value, "%s/etc/pkg/repos", localbase) < 0)
787			goto finalize;
788		STAILQ_INSERT_TAIL(c[REPOS_DIR].list, cv, next);
789	}
790
791	STAILQ_FOREACH(cv, c[REPOS_DIR].list, next)
792		if (load_repositories(cv->value))
793			goto finalize;
794
795finalize:
796	if (c[ABI].val == NULL && c[ABI].value == NULL) {
797		if (pkg_get_myabi(abi, BUFSIZ) != 0)
798			errx(EXIT_FAILURE, "Failed to determine the system "
799			    "ABI");
800		c[ABI].val = abi;
801	}
802
803	subst_packagesite(c[ABI].value != NULL ? c[ABI].value : c[ABI].val);
804
805	return (0);
806}
807
808int
809config_string(pkg_config_key k, const char **val)
810{
811	if (c[k].type != PKG_CONFIG_STRING)
812		return (-1);
813
814	if (c[k].value != NULL)
815		*val = c[k].value;
816	else
817		*val = c[k].val;
818
819	return (0);
820}
821
822int
823config_bool(pkg_config_key k, bool *val)
824{
825	const char *value;
826
827	if (c[k].type != PKG_CONFIG_BOOL)
828		return (-1);
829
830	*val = false;
831
832	if (c[k].value != NULL)
833		value = c[k].value;
834	else
835		value = c[k].val;
836
837	if (boolstr_to_bool(value))
838		*val = true;
839
840	return (0);
841}
842
843void
844config_finish(void) {
845	int i;
846
847	for (i = 0; i < CONFIG_SIZE; i++)
848		free(c[i].value);
849}
850