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librazor/razor.c
author Kristian H?gsberg <krh@redhat.com>
Sat Jun 28 19:22:55 2008 -0400 (2008-06-28)
changeset 298 ddc35bb593ef
parent 288 75da311eda45
parent 296 4531b1390261
child 301 4124c37fd953
permissions -rw-r--r--
Merge commit 'fdo/master' 
     1 /*

     2  * Copyright (C) 2008  Kristian Høgsberg <krh@redhat.com>

     3  * Copyright (C) 2008  Red Hat, Inc

     4  *

     5  * This program is free software; you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation; either version 2 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License along

    16  * with this program; if not, write to the Free Software Foundation, Inc.,

    17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

    18  */

    19 

    20 #define _GNU_SOURCE

    21 

    22 #include <stdlib.h>

    23 #include <stddef.h>

    24 #include <stdint.h>

    25 #include <stdio.h>

    26 #include <string.h>

    27 #include <sys/types.h>

    28 #include <sys/stat.h>

    29 #include <sys/mman.h>

    30 #include <unistd.h>

    31 #include <fcntl.h>

    32 #include <errno.h>

    33 #include <ctype.h>

    34 #include <fnmatch.h>

    35 

    36 #include "razor-internal.h"

    37 #include "razor.h"

    38 

    39 void *

    40 zalloc(size_t size)

    41 {

    42 	void *p;

    43 

    44 	p = malloc(size);

    45 	memset(p, 0, size);

    46 

    47 	return p;

    48 }

    49 

    50 struct razor_set_section razor_sections[] = {

    51 	{ RAZOR_STRING_POOL,	offsetof(struct razor_set, string_pool) },

    52 	{ RAZOR_PACKAGES,	offsetof(struct razor_set, packages) },

    53 	{ RAZOR_PROPERTIES,	offsetof(struct razor_set, properties) },

    54 	{ RAZOR_PACKAGE_POOL,	offsetof(struct razor_set, package_pool) },

    55 	{ RAZOR_PROPERTY_POOL,	offsetof(struct razor_set, property_pool) },

    56 };

    57 

    58 struct razor_set_section razor_files_sections[] = {

    59 	{ RAZOR_FILES,			offsetof(struct razor_set, files) },

    60 	{ RAZOR_FILE_POOL,		offsetof(struct razor_set, file_pool) },

    61 	{ RAZOR_FILE_STRING_POOL,	offsetof(struct razor_set, file_string_pool) },

    62 };

    63 

    64 struct razor_set_section razor_details_sections[] = {

    65 	{ RAZOR_DETAILS_STRING_POOL,	offsetof(struct razor_set, details_string_pool) },

    66 };

    67 

    68 RAZOR_EXPORT struct razor_set *

    69 razor_set_create(void)

    70 {

    71 	struct razor_set *set;

    72 	struct razor_entry *e;

    73 	char *empty;

    74 

    75 	set = zalloc(sizeof *set);

    76 

    77 	e = array_add(&set->files, sizeof *e);

    78 	empty = array_add(&set->string_pool, 1);

    79 	*empty = '\0';

    80 	e->name = 0;

    81 	e->flags = RAZOR_ENTRY_LAST;

    82 	e->start = 0;

    83 	list_set_empty(&e->packages);

    84 

    85 	return set;

    86 }

    87 

    88 RAZOR_EXPORT struct razor_set *

    89 razor_set_open(const char *filename)

    90 {

    91 	struct razor_set *set;

    92 	struct razor_set_section *s;

    93 	struct stat stat;

    94 	struct array *array;

    95 	int fd;

    96 

    97 	set = zalloc(sizeof *set);

    98 	fd = open(filename, O_RDONLY);

    99 	if (fstat(fd, &stat) < 0)

   100 		return NULL;

   101 	set->header = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0);

   102 	if (set->header == MAP_FAILED) {

   103 		free(set);

   104 		return NULL;

   105 	}

   106 

   107 	for (s = set->header->sections; ~s->type; s++) {

   108 		if (s->type >= ARRAY_SIZE(razor_sections))

   109 			continue;

   110 		if (s->type != razor_sections[s->type].type)

   111 			continue;

   112 		array = (void *) set + razor_sections[s->type].offset;

   113 		array->data = (void *) set->header + s->offset;

   114 		array->size = s->size;

   115 		array->alloc = s->size;

   116 	}

   117 	close(fd);

   118 

   119 	return set;

   120 }

   121 

   122 RAZOR_EXPORT int

   123 razor_set_open_details(struct razor_set *set, const char *filename)

   124 {

   125 	struct razor_set_section *s;

   126 	struct stat stat;

   127 	struct array *array;

   128 	int fd;

   129 

   130 	fd = open(filename, O_RDONLY);

   131 	if (fstat(fd, &stat) < 0)

   132 		return -1;

   133 	set->details_header = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0);

   134 	if (set->details_header == MAP_FAILED)

   135 		return -1;

   136 

   137 	for (s = set->details_header->sections; ~s->type; s++) {

   138 		if (s->type >= ARRAY_SIZE(razor_details_sections))

   139 			continue;

   140 		if (s->type != razor_details_sections[s->type].type)

   141 			continue;

   142 		array = (void *) set + razor_details_sections[s->type].offset;

   143 		array->data = (void *) set->details_header + s->offset;

   144 		array->size = s->size;

   145 		array->alloc = s->size;

   146 	}

   147 	close(fd);

   148 

   149 	return 0;

   150 }

   151 

   152 RAZOR_EXPORT int

   153 razor_set_open_files(struct razor_set *set, const char *filename)

   154 {

   155 	struct razor_set_section *s;

   156 	struct stat stat;

   157 	struct array *array;

   158 	int fd;

   159 

   160 	fd = open(filename, O_RDONLY);

   161 	if (fstat(fd, &stat) < 0)

   162 		return -1;

   163 	set->files_header = mmap(NULL, stat.st_size, PROT_READ, MAP_PRIVATE, fd, 0);

   164 	if (set->files_header == MAP_FAILED)

   165 		return -1;

   166 

   167 	for (s = set->files_header->sections; ~s->type; s++) {

   168 		if (s->type >= ARRAY_SIZE(razor_files_sections))

   169 			continue;

   170 		if (s->type != razor_files_sections[s->type].type)

   171 			continue;

   172 		array = (void *) set + razor_files_sections[s->type].offset;

   173 		array->data = (void *) set->files_header + s->offset;

   174 		array->size = s->size;

   175 		array->alloc = s->size;

   176 	}

   177 	close(fd);

   178 

   179 	return 0;

   180 }

   181 

   182 RAZOR_EXPORT void

   183 razor_set_destroy(struct razor_set *set)

   184 {

   185 	unsigned int size;

   186 	struct array *a;

   187 	int i;

   188 

   189 	if (set->header) {

   190 		for (i = 0; set->header->sections[i].type; i++)

   191 			;

   192 		size = set->header->sections[i].type;

   193 		munmap(set->header, size);

   194 	} else {

   195 		for (i = 0; i < ARRAY_SIZE(razor_sections); i++) {

   196 			a = (void *) set + razor_sections[i].offset;

   197 			free(a->data);

   198 		}

   199 	}

   200 

   201 	if (set->details_header) {

   202 		for (i = 0; set->details_header->sections[i].type; i++)

   203 			;

   204 		size = set->details_header->sections[i].type;

   205 		munmap(set->details_header, size);

   206 	} else {

   207 		for (i = 0; i < ARRAY_SIZE(razor_details_sections); i++) {

   208 			a = (void *) set + razor_details_sections[i].offset;

   209 			free(a->data);

   210 		}

   211 	}

   212 

   213 	if (set->files_header) {

   214 		for (i = 0; set->files_header->sections[i].type; i++)

   215 			;

   216 		size = set->files_header->sections[i].type;

   217 		munmap(set->files_header, size);

   218 	} else {

   219 		for (i = 0; i < ARRAY_SIZE(razor_files_sections); i++) {

   220 			a = (void *) set + razor_files_sections[i].offset;

   221 			free(a->data);

   222 		}

   223 	}

   224 

   225 	free(set);

   226 }

   227 

   228 static int

   229 razor_set_write_sections_to_fd(struct razor_set *set, int fd, int magic,

   230 			       struct razor_set_section *sections,

   231 			       size_t array_size)

   232 {

   233 	char data[4096];

   234 	struct razor_set_header *header = (struct razor_set_header *) data;

   235 	struct array *a;

   236 	uint32_t offset;

   237 	int i;

   238 

   239 	memset(data, 0, sizeof data);

   240 	header->magic = magic;

   241 	header->version = RAZOR_VERSION;

   242 	offset = sizeof data;

   243 

   244 	for (i = 0; i < array_size; i++) {

   245 		if (sections[i].type != i)

   246 			continue;

   247 		a = (void *) set + sections[i].offset;

   248 		header->sections[i].type = i;

   249 		header->sections[i].offset = offset;

   250 		header->sections[i].size = a->size;

   251 		offset += ALIGN(a->size, 4096);

   252 	}

   253 

   254 	header->sections[i].type = ~0;

   255 	header->sections[i].offset = 0;

   256 	header->sections[i].size = 0;

   257 

   258 	razor_write(fd, data, sizeof data);

   259 	memset(data, 0, sizeof data);

   260 	for (i = 0; i < array_size; i++) {

   261 		if (sections[i].type != i)

   262 			continue;

   263 		a = (void *) set + sections[i].offset;

   264 		razor_write(fd, a->data, a->size);

   265 		razor_write(fd, data, ALIGN(a->size, 4096) - a->size);

   266 	}

   267 

   268 	return 0;

   269 }

   270 

   271 RAZOR_EXPORT int

   272 razor_set_write_to_fd(struct razor_set *set, int fd,

   273 		      enum razor_repo_file_type type)

   274 {

   275 	switch (type) {

   276 	case RAZOR_REPO_FILE_MAIN:

   277 		return razor_set_write_sections_to_fd(set, fd, RAZOR_MAGIC,

   278 						      razor_sections,

   279 						      ARRAY_SIZE(razor_sections));

   280 

   281 	case RAZOR_REPO_FILE_DETAILS:

   282 		return razor_set_write_sections_to_fd(set, fd, RAZOR_DETAILS_MAGIC,

   283 						      razor_details_sections,

   284 						      ARRAY_SIZE(razor_details_sections));

   285 	case RAZOR_REPO_FILE_FILES:

   286 		return razor_set_write_sections_to_fd(set, fd, RAZOR_FILES_MAGIC,

   287 						      razor_files_sections,

   288 						      ARRAY_SIZE(razor_files_sections));

   289 	default:

   290 		return -1;

   291 	}

   292 }

   293 

   294 RAZOR_EXPORT int

   295 razor_set_write(struct razor_set *set, const char *filename,

   296 		enum razor_repo_file_type type)

   297 {

   298 	int fd, status;

   299 

   300 	fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC, 0666);

   301 	if (fd < 0)

   302 		return -1;

   303 

   304 	status = razor_set_write_to_fd(set, fd, type);

   305 	if (status) {

   306 	    close(fd);

   307 	    return status;

   308 	}

   309 

   310 	return close(fd);

   311 }

   312 

   313 RAZOR_EXPORT void

   314 razor_build_evr(char *evr_buf, int size, const char *epoch,

   315 		const char *version, const char *release)

   316 {

   317 	int len;

   318 

   319 	if (!version || !*version) {

   320 		*evr_buf = '\0';

   321 		return;

   322 	}

   323 

   324 	if (epoch && *epoch && strcmp(epoch, "0") != 0) {

   325 		len = snprintf(evr_buf, size, "%s:", epoch);

   326 		evr_buf += len;

   327 		size -= len;

   328 	}

   329 	len = snprintf(evr_buf, size, "%s", version);

   330 	evr_buf += len;

   331 	size -= len;

   332 	if (release && *release)

   333 		snprintf(evr_buf, size, "-%s", release);

   334 }

   335 

   336 RAZOR_EXPORT int

   337 razor_versioncmp(const char *s1, const char *s2)

   338 {

   339 	const char *p1, *p2;

   340 	long n1, n2;

   341 	int res;

   342 

   343 	n1 = strtol(s1, (char **) &p1, 10);

   344 	n2 = strtol(s2, (char **) &p2, 10);

   345 

   346 	/* Epoch; if one but not the other has an epoch set, default

   347 	 * the epoch-less version to 0. */

   348 	res = (*p1 == ':') - (*p2 == ':');

   349 	if (res < 0) {

   350 		n1 = 0;

   351 		p1 = s1;

   352 		p2++;

   353 	} else if (res > 0) {

   354 		p1++;

   355 		n2 = 0;

   356 		p2 = s2;

   357 	}

   358 

   359 	if (n1 != n2)

   360 		return n1 - n2;

   361 	while (*p1 && *p2) {

   362 		if (*p1 != *p2)

   363 			return *p1 - *p2;

   364 		p1++;

   365 		p2++;

   366 		if (isdigit(*p1) && isdigit(*p2))

   367 			return razor_versioncmp(p1, p2);

   368 	}

   369 

   370 	return *p1 - *p2;

   371 }

   372 

   373 RAZOR_EXPORT struct razor_package *

   374 razor_set_get_package(struct razor_set *set, const char *package)

   375 {

   376 	struct razor_package_iterator *pi;

   377 	struct razor_package *p;

   378 	const char *name, *version, *arch;

   379 

   380 	pi = razor_package_iterator_create(set);

   381 	while (razor_package_iterator_next(pi, &p, &name, &version, &arch)) {

   382 		if (strcmp(package, name) == 0)

   383 			break;

   384 	}

   385 	razor_package_iterator_destroy(pi);

   386 

   387 	return p;

   388 }

   389 

   390 RAZOR_EXPORT void

   391 razor_package_get_details(struct razor_set *set,

   392 			  struct razor_package *package,

   393 			  const char **summary, const char **description,

   394 			  const char **url, const char **license)

   395 {

   396 	const char *pool = set->details_string_pool.data;

   397 

   398 	if (summary != NULL)

   399 		*summary = &pool[package->summary];

   400 	if (description != NULL)

   401 		*description = &pool[package->description];

   402 	if (url != NULL)

   403 		*url = &pool[package->url];

   404 	if (license != NULL)

   405 		*license = &pool[package->license];

   406 }

   407 

   408 RAZOR_EXPORT const char *

   409 razor_property_relation_to_string(struct razor_property *p)

   410 {

   411 	switch (p->flags & RAZOR_PROPERTY_RELATION_MASK) {

   412 	case RAZOR_PROPERTY_LESS:

   413 		return "<";

   414 

   415 	case RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL:

   416 		return "<=";

   417 

   418 	case RAZOR_PROPERTY_EQUAL:

   419 		return "=";

   420 

   421 	case RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL:

   422 		return ">=";

   423 

   424 	case RAZOR_PROPERTY_GREATER:

   425 		return ">";

   426 

   427 	default:

   428 		return "?";

   429 	}

   430 }

   431 

   432 RAZOR_EXPORT const char *

   433 razor_property_type_to_string(struct razor_property *p)

   434 {

   435 	switch (p->flags & RAZOR_PROPERTY_TYPE_MASK) {

   436 	case RAZOR_PROPERTY_REQUIRES:

   437 		return "requires";

   438 	case RAZOR_PROPERTY_PROVIDES:

   439 		return "provides";

   440 	case RAZOR_PROPERTY_CONFLICTS:

   441 		return "conflicts";

   442 	case RAZOR_PROPERTY_OBSOLETES:

   443 		return "obsoletes";

   444 	default:

   445 		return NULL;

   446 	}

   447 }

   448 

   449 RAZOR_EXPORT struct razor_entry *

   450 razor_set_find_entry(struct razor_set *set,

   451 		     struct razor_entry *dir, const char *pattern)

   452 {

   453 	struct razor_entry *e;

   454 	const char *n, *pool = set->file_string_pool.data;

   455 	int len;

   456 

   457 	e = (struct razor_entry *) set->files.data + dir->start;

   458 	do {

   459 		n = pool + e->name;

   460 		if (strcmp(pattern + 1, n) == 0)

   461 			return e;

   462 		len = strlen(n);

   463 		if (e->start != 0 && strncmp(pattern + 1, n, len) == 0 &&

   464 		    pattern[len + 1] == '/') {

   465 			return razor_set_find_entry(set, e, pattern + len + 1);

   466 		}

   467 	} while (!((e++)->flags & RAZOR_ENTRY_LAST));

   468 

   469 	return NULL;

   470 }

   471 

   472 static void

   473 list_dir(struct razor_set *set, struct razor_entry *dir,

   474 	 char *prefix, const char *pattern)

   475 {

   476 	struct razor_entry *e;

   477 	const char *n, *pool = set->file_string_pool.data;

   478 

   479 	e = (struct razor_entry *) set->files.data + dir->start;

   480 	do {

   481 		n = pool + e->name;

   482 		if (pattern && pattern[0] && fnmatch(pattern, n, 0) != 0)

   483 			continue;

   484 		printf("%s/%s\n", prefix, n);

   485 		if (e->start) {

   486 			char *sub = prefix + strlen (prefix);

   487 			*sub = '/';

   488 			strcpy (sub + 1, n);

   489 			list_dir(set, e, prefix, pattern);

   490 			*sub = '\0';

   491 		}

   492 	} while (!((e++)->flags & RAZOR_ENTRY_LAST));

   493 }

   494 

   495 RAZOR_EXPORT void

   496 razor_set_list_files(struct razor_set *set, const char *pattern)

   497 {

   498 	struct razor_entry *e;

   499 	char buffer[512], *p, *base;

   500 

   501 	if (pattern == NULL || !strcmp (pattern, "/")) {

   502 		buffer[0] = '\0';

   503 		list_dir(set, set->files.data, buffer, NULL);

   504 		return;

   505 	}

   506 

   507 	strcpy(buffer, pattern);

   508 	e = razor_set_find_entry(set, set->files.data, buffer);

   509 	if (e && e->start > 0) {

   510 		base = NULL;

   511 	} else {

   512 		p = strrchr(buffer, '/');

   513 		if (p) {

   514 			*p = '\0';

   515 			base = p + 1;

   516 		} else {

   517 			base = NULL;

   518 		}

   519 	}

   520 	e = razor_set_find_entry(set, set->files.data, buffer);

   521 	if (e && e->start != 0)

   522 		list_dir(set, e, buffer, base);

   523 }

   524 

   525 static struct list *

   526 list_package_files(struct razor_set *set, struct list *r,

   527 		   struct razor_entry *dir, uint32_t end,

   528 		   char *prefix)

   529 {

   530 	struct razor_entry *e, *f, *entries;

   531 	uint32_t next, file;

   532 	char *pool;

   533 	int len;

   534 

   535 	entries = (struct razor_entry *) set->files.data;

   536 	pool = set->file_string_pool.data;

   537 

   538 	e = entries + dir->start;

   539 	do {

   540 		if (entries + r->data == e) {

   541 			printf("%s/%s\n", prefix, pool + e->name);

   542 			r = list_next(r);

   543 			if (!r)

   544 				return NULL;

   545 			if (r->data >= end)

   546 				return r;

   547 		}

   548 	} while (!((e++)->flags & RAZOR_ENTRY_LAST));

   549 

   550 	e = entries + dir->start;

   551 	do {

   552 		if (e->start == 0)

   553 			continue;

   554 

   555 		if (e->flags & RAZOR_ENTRY_LAST)

   556 			next = end;

   557 		else {

   558 			f = e + 1;

   559 			while (f->start == 0 && !(f->flags & RAZOR_ENTRY_LAST))

   560 				f++;

   561 			if (f->start == 0)

   562 				next = end;

   563 			else

   564 				next = f->start;

   565 		}

   566 

   567 		file = r->data;

   568 		if (e->start <= file && file < next) {

   569 			len = strlen(prefix);

   570 			prefix[len] = '/';

   571 			strcpy(prefix + len + 1, pool + e->name);

   572 			r = list_package_files(set, r, e, next, prefix);

   573 			prefix[len] = '\0';

   574 		}

   575 	} while (!((e++)->flags & RAZOR_ENTRY_LAST) && r != NULL);

   576 

   577 	return r;

   578 }

   579 

   580 RAZOR_EXPORT void

   581 razor_set_list_package_files(struct razor_set *set, const char *name)

   582 {

   583 	struct razor_package *package;

   584 	struct list *r;

   585 	uint32_t end;

   586 	char buffer[512];

   587 

   588 	package = razor_set_get_package(set, name);

   589 	/* TODO: we should return the error to the caller */

   590 	if (!package)

   591 		return;

   592 

   593 	r = list_first(&package->files, &set->file_pool);

   594 	end = set->files.size / sizeof (struct razor_entry);

   595 	buffer[0] = '\0';

   596 	list_package_files(set, r, set->files.data, end, buffer);

   597 }

   598 

   599 /* The diff order matters.  We should sort the packages so that a

   600  * REMOVE of a package comes before the INSTALL, and so that all

   601  * requires for a package have been installed before the package.

   602  **/

   603 

   604 RAZOR_EXPORT void

   605 razor_set_diff(struct razor_set *set, struct razor_set *upstream,

   606 	       razor_diff_callback_t callback, void *data)

   607 {

   608  	struct razor_package_iterator *pi1, *pi2;

   609  	struct razor_package *p1, *p2;

   610 	const char *name1, *name2, *version1, *version2, *arch1, *arch2;

   611 	int res;

   612 

   613 	pi1 = razor_package_iterator_create(set);

   614 	pi2 = razor_package_iterator_create(upstream);

   615 

   616 	razor_package_iterator_next(pi1, &p1, &name1, &version1, &arch1);

   617 	razor_package_iterator_next(pi2, &p2, &name2, &version2, &arch2);

   618 

   619 	while (p1 || p2) {

   620 		if (p1 && p2) {

   621 			res = strcmp(name1, name2);

   622 			if (res == 0)

   623 				res = razor_versioncmp(version1, version2);

   624 		} else {

   625 			res = 0;

   626 		}

   627 

   628 		if (p2 == NULL || res < 0)

   629 			callback(RAZOR_DIFF_ACTION_REMOVE,

   630 				 p1, name1, version1, arch1, data);

   631 		else if (p1 == NULL || res > 0)

   632 			callback(RAZOR_DIFF_ACTION_ADD,

   633 				 p2, name2, version2, arch2, data);

   634 

   635 		if (p1 != NULL && res <= 0)

   636 			razor_package_iterator_next(pi1, &p1,

   637 						    &name1, &version1, &arch1);

   638 		if (p2 != NULL && res >= 0)

   639 			razor_package_iterator_next(pi2, &p2,

   640 						    &name2, &version2, &arch2);

   641 	}

   642 

   643 	razor_package_iterator_destroy(pi1);

   644 	razor_package_iterator_destroy(pi2);

   645 }

   646 

   647 static void

   648 add_new_package(enum razor_diff_action action,

   649 		struct razor_package *package,

   650 		const char *name,

   651 		const char *version,

   652 		const char *arch,

   653 		void *data)

   654 {

   655 	if (action == RAZOR_DIFF_ACTION_ADD)

   656 		razor_package_query_add_package(data, package);

   657 }

   658 

   659 RAZOR_EXPORT struct razor_package_iterator *

   660 razor_set_create_remove_iterator(struct razor_set *set,

   661 				 struct razor_set *next)

   662 {

   663 	struct razor_package_query *query;

   664 	struct razor_package_iterator *pi;

   665 

   666 	query = razor_package_query_create(set);

   667 	razor_set_diff(next, set, add_new_package, query);

   668 

   669 	pi = razor_package_query_finish(query);

   670 

   671 	/* FIXME: We need to figure out the right install order here,

   672 	 * so the post and pre scripts can run. */

   673 

   674 	/* sort */

   675 

   676 	return pi;

   677 }

   678 

   679 RAZOR_EXPORT struct razor_package_iterator *

   680 razor_set_create_install_iterator(struct razor_set *set,

   681 				  struct razor_set *next)

   682 {

   683 	struct razor_package_query *query;

   684 	struct razor_package_iterator *pi;

   685 

   686 	query = razor_package_query_create(next);

   687 	razor_set_diff(set, next, add_new_package, query);

   688 

   689 	pi = razor_package_query_finish(query);

   690 

   691 	/* FIXME: We need to figure out the right install order here,

   692 	 * so the post and pre scripts can run. */

   693 

   694 	/* sort */

   695 

   696 	return pi;

   697 }
razor