package.c 11.7 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11
/* package.c - Alpine Package Keeper (APK)
 *
 * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
 * Copyright (C) 2008 Timo Teräs <timo.teras@iki.fi>
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation. See http://www.gnu.org/ for details.
 */

12
#include <errno.h>
13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
#include <fcntl.h>
#include <ctype.h>
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/wait.h>

#include "apk_defines.h"
#include "apk_archive.h"
#include "apk_package.h"
#include "apk_database.h"
#include "apk_state.h"

int apk_pkg_parse_name(apk_blob_t apkname,
		       apk_blob_t *name,
		       apk_blob_t *version)
{
	int i, dash = 0;

	for (i = apkname.len - 2; i >= 0; i--) {
		if (apkname.ptr[i] != '-')
			continue;
		if (isdigit(apkname.ptr[i+1]))
			break;
		if (++dash >= 2)
			return -1;
	}
	if (name != NULL)
		*name = APK_BLOB_PTR_LEN(apkname.ptr, i);
	if (version != NULL)
		*version = APK_BLOB_PTR_PTR(&apkname.ptr[i+1],
					    &apkname.ptr[apkname.len-1]);

	return 0;
}

Timo Teräs's avatar
Timo Teräs committed
52
static apk_blob_t trim(apk_blob_t str)
53 54
{
	if (str.ptr == NULL || str.len < 1)
Timo Teräs's avatar
Timo Teräs committed
55
		return str;
56

57 58
	if (str.ptr[str.len-1] == '\n') {
		str.ptr[str.len-1] = 0;
Timo Teräs's avatar
Timo Teräs committed
59
		return APK_BLOB_PTR_LEN(str.ptr, str.len-1);
60
	}
61

Timo Teräs's avatar
Timo Teräs committed
62
	return str;
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110
}

static void parse_depend(struct apk_database *db,
			 struct apk_dependency_array **depends,
			 apk_blob_t blob)
{
	struct apk_dependency *dep;
	struct apk_name *name;
	char *cname;

	while (blob.len && blob.ptr[0] == ' ')
		blob.ptr++, blob.len--;
	while (blob.len && (blob.ptr[blob.len-1] == ' ' ||
			    blob.ptr[blob.len-1] == 0))
		blob.len--;

	if (blob.len == 0)
		return;

	cname = apk_blob_cstr(blob);
	name = apk_db_get_name(db, cname);
	free(cname);

	dep = apk_dependency_array_add(depends);
	*dep = (struct apk_dependency){
		.prefer_upgrade = 0,
		.version_mask = 0,
		.name = name,
		.version = NULL,
	};
}

int apk_deps_add(struct apk_dependency_array **depends,
		 struct apk_dependency *dep)
{
	struct apk_dependency_array *deps = *depends;
	int i;

	if (deps != NULL) {
		for (i = 0; i < deps->num; i++) {
			if (deps->item[i].name == dep->name)
				return 0;
		}
	}

	*apk_dependency_array_add(depends) = *dep;
	return 0;
}
Timo Teräs's avatar
Timo Teräs committed
111

112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
void apk_deps_parse(struct apk_database *db,
		    struct apk_dependency_array **depends,
		    apk_blob_t blob)
{
	char *start;
	int i;

	start = blob.ptr;
	for (i = 0; i < blob.len; i++) {
		if (blob.ptr[i] != ',' && blob.ptr[i] != '\n')
			continue;

		parse_depend(db, depends,
			     APK_BLOB_PTR_PTR(start, &blob.ptr[i-1]));
		start = &blob.ptr[i+1];
	}
	parse_depend(db, depends,
		     APK_BLOB_PTR_PTR(start, &blob.ptr[i-1]));
}

int apk_deps_format(char *buf, int size,
		    struct apk_dependency_array *depends)
{
	int i, n = 0;

	if (depends == NULL)
		return 0;

	for (i = 0; i < depends->num - 1; i++)
		n += snprintf(&buf[n], size-n,
			      "%s, ",
			      depends->item[i].name->name);
	n += snprintf(&buf[n], size-n,
		      "%s\n",
		      depends->item[i].name->name);
	return n;
}

static const char *script_types[] = {
	[APK_SCRIPT_PRE_INSTALL]	= "pre-install",
	[APK_SCRIPT_POST_INSTALL]	= "post-install",
	[APK_SCRIPT_PRE_DEINSTALL]	= "pre-deinstall",
	[APK_SCRIPT_POST_DEINSTALL]	= "post-deinstall",
	[APK_SCRIPT_PRE_UPGRADE]	= "pre-upgrade",
	[APK_SCRIPT_POST_UPGRADE]	= "post-upgrade",
};

Timo Teräs's avatar
Timo Teräs committed
159 160 161 162 163 164 165 166 167
static const char *script_types2[] = {
	[APK_SCRIPT_PRE_INSTALL]	= "pre_install",
	[APK_SCRIPT_POST_INSTALL]	= "post_install",
	[APK_SCRIPT_PRE_DEINSTALL]	= "pre_deinstall",
	[APK_SCRIPT_POST_DEINSTALL]	= "post_deinstall",
	[APK_SCRIPT_PRE_UPGRADE]	= "pre_upgrade",
	[APK_SCRIPT_POST_UPGRADE]	= "post_upgrade",
};

168 169 170 171 172 173 174 175 176
int apk_script_type(const char *name)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(script_types); i++)
		if (script_types[i] &&
		    strcmp(script_types[i], name) == 0)
			return i;

177
	return APK_SCRIPT_INVALID;
178 179 180 181 182 183 184 185
}

struct read_info_ctx {
	struct apk_database *db;
	struct apk_package *pkg;
	int has_install;
};

Timo Teräs's avatar
Timo Teräs committed
186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258
static int add_info(struct apk_database *db, struct apk_package *pkg,
		    char field, apk_blob_t value)
{
	char *str;

	switch (field) {
	case 'P':
		str = apk_blob_cstr(value);
		pkg->name = apk_db_get_name(db, str);
		free(str);
		break;
	case 'V':
		pkg->version = apk_blob_cstr(value);
		break;
	case 'T':
		pkg->description = apk_blob_cstr(value);
		break;
	case 'U':
		pkg->url = apk_blob_cstr(value);
		break;
	case 'L':
		pkg->license = apk_blob_cstr(value);
		break;
	case 'D':
		apk_deps_parse(db, &pkg->depends, value);
		break;
	case 'C':
		apk_hexdump_parse(APK_BLOB_BUF(pkg->csum), value);
		break;
	case 'S':
		pkg->size = apk_blob_uint(value, 10);
		break;
	case 'I':
		pkg->installed_size = apk_blob_uint(value, 10);
		break;
	}
	return 0;
}

static int read_info_line(void *ctx, apk_blob_t line)
{
	static struct {
		const char *str;
		char field;
	} fields[] = {
		{ "pkgname", 'P' },
		{ "pkgver",  'V' },
		{ "pkgdesc", 'T' },
		{ "url",     'U' },
		{ "size",    'I' },
		{ "license", 'L' },
		{ "depend",  'D' },
	};
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
	apk_blob_t l, r;
	int i;

	if (line.ptr == NULL || line.len < 1 || line.ptr[0] == '#')
		return 0;

	if (!apk_blob_splitstr(line, " = ", &l, &r))
		return 0;

	for (i = 0; i < ARRAY_SIZE(fields); i++) {
		if (strncmp(fields[i].str, l.ptr, l.len) == 0) {
			add_info(ri->db, ri->pkg, fields[i].field, r);
			break;
		}
	}

	return 0;
}

259 260
static int read_info_entry(void *ctx, const struct apk_archive_entry *ae,
			   struct apk_istream *is)
261
{
Timo Teräs's avatar
Timo Teräs committed
262 263 264 265 266 267 268 269 270
	static struct {
		const char *str;
		char field;
	} fields[] = {
		{ "DESC",	'T' },
		{ "WW",		'U' },
		{ "LICENSE",	'L' },
		{ "DEPEND", 	'D' },
	};
271 272 273 274 275 276
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
	struct apk_database *db = ri->db;
	struct apk_package *pkg = ri->pkg;
	const int bsize = 4 * 1024;
	apk_blob_t name, version;
	char *slash, *str;
Timo Teräs's avatar
Timo Teräs committed
277
	int i;
278

Timo Teräs's avatar
Timo Teräs committed
279 280 281 282
	/* Meta info and scripts */
	if (ae->name[0] == '.') {
		/* APK 2.0 format */
		if (strcmp(ae->name, ".PKGINFO") == 0) {
283
			apk_blob_t blob = apk_blob_from_istream(is, ae->size);
Timo Teräs's avatar
Timo Teräs committed
284 285
			apk_blob_for_each_segment(blob, "\n", read_info_line, ctx);
			free(blob.ptr);
286
			return 1;
Timo Teräs's avatar
Timo Teräs committed
287
		}
288
		/* FIXME: Check for .INSTALL */
Timo Teräs's avatar
Timo Teräs committed
289 290 291 292
	} else if (strncmp(ae->name, "var/db/apk/", 11) == 0) {
		/* APK 1.0 format */
		if (!S_ISREG(ae->mode))
			return 0;
293

Timo Teräs's avatar
Timo Teräs committed
294 295 296
		slash = strchr(&ae->name[11], '/');
		if (slash == NULL)
			return 0;
297

Timo Teräs's avatar
Timo Teräs committed
298 299 300
		if (apk_pkg_parse_name(APK_BLOB_PTR_PTR(&ae->name[11], slash-1),
				       &name, &version) < 0)
			return -1;
301

Timo Teräs's avatar
Timo Teräs committed
302 303 304 305 306 307 308 309 310 311
		if (pkg->name == NULL) {
			str = apk_blob_cstr(name);
			pkg->name = apk_db_get_name(db, str);
			free(str);
		}
		if (pkg->version == NULL)
			pkg->version = apk_blob_cstr(version);

		for (i = 0; i < ARRAY_SIZE(fields); i++) {
			if (strcmp(fields[i].str, slash+1) == 0) {
312
				apk_blob_t blob = apk_blob_from_istream(is, ae->size);
Timo Teräs's avatar
Timo Teräs committed
313 314 315 316 317
				add_info(ri->db, ri->pkg, fields[i].field,
					 trim(blob));
				free(blob.ptr);
				break;
			}
318
		}
Timo Teräs's avatar
Timo Teräs committed
319 320 321 322 323 324
		if (apk_script_type(slash+1) == APK_SCRIPT_POST_INSTALL ||
		    apk_script_type(slash+1) == APK_SCRIPT_PRE_INSTALL)
			ri->has_install = 1;
	} else {
		pkg->installed_size += (ae->size + bsize - 1) & ~(bsize - 1);
	}
325 326 327 328 329 330 331

	return 0;
}

struct apk_package *apk_pkg_read(struct apk_database *db, const char *file)
{
	struct read_info_ctx ctx;
332
	struct apk_bstream *bs;
333 334 335 336 337 338 339 340 341 342 343 344 345 346
	struct stat st;
	int fd;

	ctx.pkg = calloc(1, sizeof(struct apk_package));
	if (ctx.pkg == NULL)
		return NULL;

	fd = open(file, O_RDONLY);
	if (fd < 0)
		goto err;

	fstat(fd, &st);
	fcntl(fd, F_SETFD, FD_CLOEXEC);

347 348 349
	bs = apk_bstream_from_fd(fd);
	if (bs == NULL) {
		close(fd);
350
		goto err;
351
	}
352 353 354 355

	ctx.db = db;
	ctx.pkg->size = st.st_size;
	ctx.has_install = 0;
356
	if (apk_parse_tar_gz(bs, read_info_entry, &ctx) < 0) {
Timo Teräs's avatar
Timo Teräs committed
357
		apk_error("File %s is not an APK archive", file);
358
		bs->close(bs, NULL);
359 360
		goto err;
	}
361
	bs->close(bs, ctx.pkg->csum);
362

Timo Teräs's avatar
Timo Teräs committed
363 364
	if (ctx.pkg->name == NULL) {
		apk_error("File %s is corrupted", file);
365
		goto err;
Timo Teräs's avatar
Timo Teräs committed
366
	}
367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410

	/* Add implicit busybox dependency if there is scripts */
	if (ctx.has_install) {
		struct apk_dependency dep = {
			.name = apk_db_get_name(db, "busybox"),
		};
		apk_deps_add(&ctx.pkg->depends, &dep);
	}

	return ctx.pkg;
err:
	apk_pkg_free(ctx.pkg);
	return NULL;
}

void apk_pkg_free(struct apk_package *pkg)
{
	struct apk_script *script;
	struct hlist_node *c, *n;

	if (pkg == NULL)
		return;

	hlist_for_each_entry_safe(script, c, n, &pkg->scripts, script_list)
		free(script);

	if (pkg->version)
		free(pkg->version);
	if (pkg->url)
		free(pkg->url);
	if (pkg->description)
		free(pkg->description);
	if (pkg->license)
		free(pkg->license);
	free(pkg);
}

int apk_pkg_get_state(struct apk_package *pkg)
{
	if (hlist_hashed(&pkg->installed_pkgs_list))
		return APK_STATE_INSTALL;
	return APK_STATE_NO_INSTALL;
}

411
int apk_pkg_add_script(struct apk_package *pkg, struct apk_istream *is,
412 413 414 415 416 417 418 419
		       unsigned int type, unsigned int size)
{
	struct apk_script *script;
	int r;

	script = malloc(sizeof(struct apk_script) + size);
	script->type = type;
	script->size = size;
420
	r = is->read(is, script->script, size);
421 422 423 424 425 426 427 428 429
	if (r < 0) {
		free(script);
		return r;
	}

	hlist_add_head(&script->script_list, &pkg->scripts);
	return r;
}

430
int apk_pkg_run_script(struct apk_package *pkg, int root_fd,
431 432
		       unsigned int type)
{
433 434 435 436
	static const char * const environment[] = {
		"PATH=/usr/sbin:/usr/bin:/sbin:/bin",
		NULL
	};
437 438 439 440 441 442
	struct apk_script *script;
	struct hlist_node *c;
	int fd, status;
	pid_t pid;
	char fn[1024];

443
	fchdir(root_fd);
444
	hlist_for_each_entry(script, c, &pkg->scripts, script_list) {
Timo Teräs's avatar
Timo Teräs committed
445 446
		if (script->type != type &&
		    script->type != APK_SCRIPT_GENERIC)
447 448 449 450 451
			continue;

		snprintf(fn, sizeof(fn),
			"tmp/%s-%s.%s",
			pkg->name->name, pkg->version,
Timo Teräs's avatar
Timo Teräs committed
452
			script_types[type]);
453 454 455 456 457 458 459 460 461 462 463 464
		fd = creat(fn, 0777);
		if (fd < 0)
			return fd;
		write(fd, script->script, script->size);
		close(fd);

		apk_message("Executing %s", &fn[4]);

		pid = fork();
		if (pid == -1)
			return -1;
		if (pid == 0) {
465 466
			if (chroot(".") < 0) {
				apk_error("chroot: %s", strerror(errno));
Timo Teräs's avatar
Timo Teräs committed
467 468 469 470 471
			} else if (script->type == APK_SCRIPT_GENERIC) {
				execle(fn, "INSTALL", script_types2[type],
				       pkg->version, "", NULL, environment);
			} else {
				execle(fn, script_types[type],
472
				       pkg->version, "", NULL, environment);
Timo Teräs's avatar
Timo Teräs committed
473
			}
474 475 476
			exit(1);
		}
		waitpid(pid, &status, 0);
Timo Teräs's avatar
Timo Teräs committed
477
		unlink(fn);
478 479 480 481 482 483 484 485
		if (WIFEXITED(status))
			return WEXITSTATUS(status);
		return -1;
	}

	return 0;
}

Timo Teräs's avatar
Timo Teräs committed
486
static int parse_index_line(void *ctx, apk_blob_t line)
487
{
Timo Teräs's avatar
Timo Teräs committed
488
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
489

Timo Teräs's avatar
Timo Teräs committed
490 491
	if (line.len < 3 || line.ptr[1] != ':')
		return 0;
492

Timo Teräs's avatar
Timo Teräs committed
493
	add_info(ri->db, ri->pkg, line.ptr[0], APK_BLOB_PTR_LEN(line.ptr+2, line.len-2));
494 495 496 497 498
	return 0;
}

struct apk_package *apk_pkg_parse_index_entry(struct apk_database *db, apk_blob_t blob)
{
Timo Teräs's avatar
Timo Teräs committed
499
	struct read_info_ctx ctx;
500

Timo Teräs's avatar
Timo Teräs committed
501 502
	ctx.pkg = calloc(1, sizeof(struct apk_package));
	if (ctx.pkg == NULL)
503 504
		return NULL;

Timo Teräs's avatar
Timo Teräs committed
505 506
	ctx.db = db;
	ctx.has_install = 0;
507

Timo Teräs's avatar
Timo Teräs committed
508 509 510 511
	apk_blob_for_each_segment(blob, "\n", parse_index_line, &ctx);

	if (ctx.pkg->name == NULL) {
		apk_pkg_free(ctx.pkg);
512
		printf("%.*s\n", blob.len, blob.ptr);
Timo Teräs's avatar
Timo Teräs committed
513
		ctx.pkg = NULL;
514 515
	}

Timo Teräs's avatar
Timo Teräs committed
516
	return ctx.pkg;
517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547
}

apk_blob_t apk_pkg_format_index_entry(struct apk_package *info, int size,
				      char *buf)
{
	int n = 0;

	n += snprintf(&buf[n], size-n,
		      "P:%s\n"
		      "V:%s\n"
		      "S:%u\n"
		      "I:%u\n"
		      "T:%s\n"
		      "U:%s\n"
		      "L:%s\n",
		      info->name->name, info->version,
		      info->size, info->installed_size,
		      info->description, info->url, info->license);

	if (info->depends != NULL) {
		n += snprintf(&buf[n], size-n, "D:");
		n += apk_deps_format(&buf[n], size-n, info->depends);
	}
	n += snprintf(&buf[n], size-n, "C:");
	n += apk_hexdump_format(size-n, &buf[n],
				APK_BLOB_BUF(info->csum));
	n += snprintf(&buf[n], size-n,
		      "\n\n");

	return APK_BLOB_PTR_LEN(buf, n);
}