package.c 11 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 52 53 54 55 56 57 58 59 60 61 62 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
#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;
}

static char *trim(apk_blob_t str)
{
	if (str.ptr == NULL || str.len < 1)
		return NULL;

	if (str.ptr[str.len-2] == '\n')
		str.ptr[str.len-2] = 0;

	return str.ptr;
}

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
109

110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174
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",
};

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;

	return -1;
}

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

Timo Teräs's avatar
Timo Teräs committed
175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247
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;
}

248 249 250 251 252 253 254 255 256
static int read_info_entry(struct apk_archive_entry *ae, void *ctx)
{
	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
257 258 259 260 261 262 263
	if (strcmp(ae->name, ".PKGINFO") == 0) {
		apk_blob_t blob = apk_archive_entry_read(ae);
		apk_blob_for_each_segment(blob, "\n", read_info_line, ctx);
		free(blob.ptr);
		return 0;
	}

264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331
	if (strncmp(ae->name, "var/db/apk/", 11) != 0) {
		pkg->installed_size += (ae->size + bsize - 1) & ~(bsize - 1);
		return 0;
	}

	if (!S_ISREG(ae->mode))
		return 0;

	slash = strchr(&ae->name[11], '/');
	if (slash == NULL)
		return 0;

	if (apk_pkg_parse_name(APK_BLOB_PTR_PTR(&ae->name[11], slash-1),
			       &name, &version) < 0)
		return -1;

	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);

	if (strcmp(slash, "/DEPEND") == 0) {
		apk_blob_t blob = apk_archive_entry_read(ae);
		if (blob.ptr) {
			apk_deps_parse(db, &pkg->depends, blob);
			free(blob.ptr);
		}
	} else if (strcmp(slash, "/DESC") == 0) {
		pkg->description = trim(apk_archive_entry_read(ae));
	} else if (strcmp(slash, "/WWW") == 0) {
		pkg->url = trim(apk_archive_entry_read(ae));
	} else if (strcmp(slash, "/LICENSE") == 0) {
		pkg->license = trim(apk_archive_entry_read(ae));
	} else if (apk_script_type(slash+1) == APK_SCRIPT_POST_INSTALL ||
		   apk_script_type(slash+1) == APK_SCRIPT_PRE_INSTALL)
		ri->has_install = 1;

	return 0;
}

struct apk_package *apk_pkg_read(struct apk_database *db, const char *file)
{
	struct read_info_ctx ctx;
	struct stat st;
	pthread_t tid;
	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);

	tid = apk_checksum_and_tee(&fd, ctx.pkg->csum);
	if (fd < 0)
		goto err;

	ctx.db = db;
	ctx.pkg->size = st.st_size;
	ctx.has_install = 0;
Timo Teräs's avatar
Timo Teräs committed
332 333
	if (apk_parse_tar_gz(fd, read_info_entry, &ctx) < 0) {
		apk_error("File %s is not an APK archive", file);
334 335 336 337 338
		pthread_join(tid, NULL);
		goto err;
	}
	pthread_join(tid, NULL);

Timo Teräs's avatar
Timo Teräs committed
339 340
	if (ctx.pkg->name == NULL) {
		apk_error("File %s is corrupted", file);
341
		goto err;
Timo Teräs's avatar
Timo Teräs committed
342
	}
343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407

	close(fd);

	/* 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;
}

int apk_pkg_add_script(struct apk_package *pkg, int fd,
		       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;
	r = read(fd, script->script, size);
	if (r < 0) {
		free(script);
		return r;
	}

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

408
int apk_pkg_run_script(struct apk_package *pkg, int root_fd,
409 410
		       unsigned int type)
{
411 412 413 414
	static const char * const environment[] = {
		"PATH=/usr/sbin:/usr/bin:/sbin:/bin",
		NULL
	};
415 416 417 418 419 420
	struct apk_script *script;
	struct hlist_node *c;
	int fd, status;
	pid_t pid;
	char fn[1024];

421
	fchdir(root_fd);
422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441
	hlist_for_each_entry(script, c, &pkg->scripts, script_list) {
		if (script->type != type)
			continue;

		snprintf(fn, sizeof(fn),
			"tmp/%s-%s.%s",
			pkg->name->name, pkg->version,
			script_types[script->type]);
		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) {
442 443 444 445 446
			if (chroot(".") < 0) {
				apk_error("chroot: %s", strerror(errno));
			} else
				execle(fn, script_types[script->type],
				       pkg->version, "", NULL, environment);
447 448 449
			exit(1);
		}
		waitpid(pid, &status, 0);
450
		//unlink(fn);
451 452 453 454 455 456 457 458
		if (WIFEXITED(status))
			return WEXITSTATUS(status);
		return -1;
	}

	return 0;
}

Timo Teräs's avatar
Timo Teräs committed
459
static int parse_index_line(void *ctx, apk_blob_t line)
460
{
Timo Teräs's avatar
Timo Teräs committed
461
	struct read_info_ctx *ri = (struct read_info_ctx *) ctx;
462

Timo Teräs's avatar
Timo Teräs committed
463 464
	if (line.len < 3 || line.ptr[1] != ':')
		return 0;
465

Timo Teräs's avatar
Timo Teräs committed
466
	add_info(ri->db, ri->pkg, line.ptr[0], APK_BLOB_PTR_LEN(line.ptr+2, line.len-2));
467 468 469 470 471
	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
472
	struct read_info_ctx ctx;
473

Timo Teräs's avatar
Timo Teräs committed
474 475
	ctx.pkg = calloc(1, sizeof(struct apk_package));
	if (ctx.pkg == NULL)
476 477
		return NULL;

Timo Teräs's avatar
Timo Teräs committed
478 479
	ctx.db = db;
	ctx.has_install = 0;
480

Timo Teräs's avatar
Timo Teräs committed
481 482 483 484
	apk_blob_for_each_segment(blob, "\n", parse_index_line, &ctx);

	if (ctx.pkg->name == NULL) {
		apk_pkg_free(ctx.pkg);
485
		printf("%.*s\n", blob.len, blob.ptr);
Timo Teräs's avatar
Timo Teräs committed
486
		ctx.pkg = NULL;
487 488
	}

Timo Teräs's avatar
Timo Teräs committed
489
	return ctx.pkg;
490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520
}

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);
}