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src/import-yum.c
author James Bowes <jbowes@redhat.com>
Fri Jun 20 19:04:47 2008 -0400 (2008-06-20)
changeset 258 29d5002bd17f
parent 247 63444a10fb8e
child 259 5b0601d184ed
permissions -rw-r--r--
Merge branch 'krh/master'

Conflicts:

librazor/razor.h
librazor/rpm.c
razor.c
src/main.c 
     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 <string.h>

    23 #include <stdio.h>

    24 #include <stdint.h>

    25 #include <sys/stat.h>

    26 #include <sys/mman.h>

    27 #include <unistd.h>

    28 #include <fcntl.h>

    29 #include <errno.h>

    30 

    31 #include <expat.h>

    32 #include <zlib.h>

    33 #include "razor.h"

    34 

    35 /* Import a yum filelist as a razor package set. */

    36 

    37 enum {

    38 	YUM_STATE_BEGIN,

    39 	YUM_STATE_PACKAGE_NAME,

    40 	YUM_STATE_PACKAGE_ARCH,

    41 	YUM_STATE_SUMMARY,

    42 	YUM_STATE_DESCRIPTION,

    43 	YUM_STATE_URL,

    44 	YUM_STATE_LICENSE,

    45 	YUM_STATE_CHECKSUM,

    46 	YUM_STATE_REQUIRES,

    47 	YUM_STATE_PROVIDES,

    48 	YUM_STATE_OBSOLETES,

    49 	YUM_STATE_CONFLICTS,

    50 	YUM_STATE_FILE

    51 };

    52 

    53 struct yum_context {

    54 	XML_Parser primary_parser;

    55 	XML_Parser filelists_parser;

    56 	XML_Parser current_parser;

    57 

    58 	struct razor_importer *importer;

    59 	struct import_property_context *current_property_context;

    60 	char name[256], arch[64], summary[512], description[4096];

    61 	char url[256], license[64], buffer[512], *p;

    62 	char pkgid[128];

    63 	uint32_t property_type;

    64 	int state;

    65 };

    66 

    67 static uint32_t

    68 yum_to_razor_relation (const char *flags)

    69 {

    70 	if (flags[0] == 'L') {

    71 		if (flags[1] == 'T')

    72 			return RAZOR_PROPERTY_LESS;

    73 		else

    74 			return RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL;

    75 	} else if (flags[0] == 'G') {

    76 		if (flags[1] == 'T')

    77 			return RAZOR_PROPERTY_GREATER;

    78 		else

    79 			return RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL;

    80 	} else

    81 		return RAZOR_PROPERTY_EQUAL;

    82 }

    83 

    84 static void

    85 yum_primary_start_element(void *data, const char *name, const char **atts)

    86 {

    87 	struct yum_context *ctx = data;

    88 	const char *n, *epoch, *version, *release;

    89 	char buffer[128];

    90 	uint32_t pre, relation, flags;

    91 	int i;

    92 

    93 	if (strcmp(name, "name") == 0) {

    94 		ctx->state = YUM_STATE_PACKAGE_NAME;

    95 		ctx->p = ctx->name;

    96 	} else if (strcmp(name, "arch") == 0) {

    97 		ctx->state = YUM_STATE_PACKAGE_ARCH;

    98 		ctx->p = ctx->arch;

    99 	} else if (strcmp(name, "version") == 0) {

   100 		epoch = NULL;

   101 		version = NULL;

   102 		release = NULL;

   103 		for (i = 0; atts[i]; i += 2) {

   104 			if (strcmp(atts[i], "epoch") == 0)

   105 				epoch = atts[i + 1];

   106 			else if (strcmp(atts[i], "ver") == 0)

   107 				version = atts[i + 1];

   108 			else if (strcmp(atts[i], "rel") == 0)

   109 				release = atts[i + 1];

   110 		}

   111 		if (version == NULL || release == NULL) {

   112 			fprintf(stderr, "invalid version tag, "

   113 				"missing version or  release attribute\n");

   114 			return;

   115 		}

   116 

   117 		razor_build_evr(buffer, sizeof buffer, epoch, version, release);

   118 		razor_importer_begin_package(ctx->importer,

   119 					     ctx->name, buffer, ctx->arch);

   120 	} else if (strcmp(name, "summary") == 0) {

   121 		ctx->p = ctx->summary;

   122 		ctx->state = YUM_STATE_SUMMARY;

   123 	} else if (strcmp(name, "description") == 0) {

   124 		ctx->p = ctx->description;

   125 		ctx->state = YUM_STATE_DESCRIPTION;

   126 	} else if (strcmp(name, "url") == 0) {

   127 		ctx->p = ctx->url;

   128 		ctx->state = YUM_STATE_URL;

   129 	} else if (strcmp(name, "checksum") == 0) {

   130 		ctx->p = ctx->pkgid;

   131 		ctx->state = YUM_STATE_CHECKSUM;

   132 	} else if (strcmp(name, "rpm:license") == 0) {

   133 		ctx->p = ctx->license;

   134 		ctx->state = YUM_STATE_LICENSE;

   135 	} else if (strcmp(name, "rpm:requires") == 0) {

   136 		ctx->state = YUM_STATE_REQUIRES;

   137 		ctx->property_type = RAZOR_PROPERTY_REQUIRES;

   138 	} else if (strcmp(name, "rpm:provides") == 0) {

   139 		ctx->state = YUM_STATE_PROVIDES;

   140 		ctx->property_type = RAZOR_PROPERTY_PROVIDES;

   141 	} else if (strcmp(name, "rpm:obsoletes") == 0) {

   142 		ctx->state = YUM_STATE_OBSOLETES;

   143 		ctx->property_type = RAZOR_PROPERTY_OBSOLETES;

   144 	} else if (strcmp(name, "rpm:conflicts") == 0) {

   145 		ctx->state = YUM_STATE_CONFLICTS;

   146 		ctx->property_type = RAZOR_PROPERTY_CONFLICTS;

   147 	} else if (strcmp(name, "rpm:entry") == 0 &&

   148 		   ctx->state != YUM_STATE_BEGIN) {

   149 		n = NULL;

   150 		epoch = NULL;

   151 		version = NULL;

   152 		release = NULL;

   153 		relation = RAZOR_PROPERTY_EQUAL;

   154 		pre = 0;

   155 		for (i = 0; atts[i]; i += 2) {

   156 			if (strcmp(atts[i], "name") == 0)

   157 				n = atts[i + 1];

   158 			else if (strcmp(atts[i], "epoch") == 0)

   159 				epoch = atts[i + 1];

   160 			else if (strcmp(atts[i], "ver") == 0)

   161 				version = atts[i + 1];

   162 			else if (strcmp(atts[i], "rel") == 0)

   163 				release = atts[i + 1];

   164 			else if (strcmp(atts[i], "flags") == 0)

   165 				relation = yum_to_razor_relation(atts[i + 1]);

   166 			else if (strcmp(atts[i], "pre") == 0)

   167 				pre = 

   168 					RAZOR_PROPERTY_PRE |

   169 					RAZOR_PROPERTY_POST |

   170 					RAZOR_PROPERTY_PREUN |

   171 					RAZOR_PROPERTY_POSTUN;

   172 		}

   173 

   174 		if (n == NULL) {

   175 			fprintf(stderr, "invalid rpm:entry, "

   176 				"missing name or version attributes\n");

   177 			return;

   178 		}

   179 

   180 		razor_build_evr(buffer, sizeof buffer, epoch, version, release);

   181 		flags = ctx->property_type | relation | pre;

   182 		razor_importer_add_property(ctx->importer, n, flags, buffer);

   183 	}

   184 }

   185 

   186 static void

   187 yum_primary_end_element (void *data, const char *name)

   188 {

   189 	struct yum_context *ctx = data;

   190 

   191 	switch (ctx->state) {

   192 	case YUM_STATE_PACKAGE_NAME:

   193 	case YUM_STATE_PACKAGE_ARCH:

   194 	case YUM_STATE_SUMMARY:

   195 	case YUM_STATE_DESCRIPTION:

   196 	case YUM_STATE_URL:

   197 	case YUM_STATE_LICENSE:

   198 	case YUM_STATE_CHECKSUM:

   199 	case YUM_STATE_FILE:

   200 		ctx->state = YUM_STATE_BEGIN;

   201 		break;

   202 	}

   203 

   204 	if (strcmp(name, "package") == 0) {

   205 		razor_importer_add_details(ctx->importer, ctx->summary,

   206 					   ctx->description, ctx->url,

   207 					   ctx->license);

   208 

   209 		XML_StopParser(ctx->current_parser, XML_TRUE);

   210 		ctx->current_parser = ctx->filelists_parser;

   211 	}

   212 }

   213 

   214 static void

   215 yum_character_data (void *data, const XML_Char *s, int len)

   216 {

   217 	struct yum_context *ctx = data;

   218 

   219 	switch (ctx->state) {

   220 	case YUM_STATE_PACKAGE_NAME:

   221 	case YUM_STATE_PACKAGE_ARCH:

   222 	case YUM_STATE_SUMMARY:

   223 	case YUM_STATE_DESCRIPTION:

   224 	case YUM_STATE_URL:

   225 	case YUM_STATE_LICENSE:

   226 	case YUM_STATE_CHECKSUM:

   227 	case YUM_STATE_FILE:

   228 		memcpy(ctx->p, s, len);

   229 		ctx->p += len;

   230 		*ctx->p = '\0';

   231 		break;

   232 	}

   233 }

   234 

   235 static void

   236 yum_filelists_start_element(void *data, const char *name, const char **atts)

   237 {

   238 	struct yum_context *ctx = data;

   239 	const char *pkg, *pkgid;

   240 	int i;

   241 

   242 	if (strcmp(name, "package") == 0) {

   243 		pkg = NULL;

   244 		pkgid = NULL;

   245 		for (i = 0; atts[i]; i += 2) {

   246 			if (strcmp(atts[i], "name") == 0)

   247 				pkg = atts[i + 1];

   248 			else if (strcmp(atts[i], "pkgid") == 0)

   249 				pkgid = atts[i + 1];

   250 		}

   251 		if (strcmp(pkgid, ctx->pkgid) != 0)

   252 			fprintf(stderr, "primary.xml and filelists.xml "

   253 				"mismatch for %s: %s vs %s",

   254 				pkg, pkgid, ctx->pkgid);

   255 	} else if (strcmp(name, "file") == 0) {

   256 		ctx->state = YUM_STATE_FILE;

   257 		ctx->p = ctx->buffer;

   258 	}

   259 }

   260 

   261 

   262 static void

   263 yum_filelists_end_element (void *data, const char *name)

   264 {

   265 	struct yum_context *ctx = data;

   266 

   267 	ctx->state = YUM_STATE_BEGIN;

   268 	if (strcmp(name, "package") == 0) {

   269 		XML_StopParser(ctx->current_parser, XML_TRUE);

   270 		ctx->current_parser = ctx->primary_parser;

   271 		razor_importer_finish_package(ctx->importer);

   272 	} else if (strcmp(name, "file") == 0)

   273 		razor_importer_add_file(ctx->importer, ctx->buffer);

   274 

   275 }

   276 

   277 #define XML_BUFFER_SIZE 4096

   278 

   279 struct razor_set *

   280 razor_set_create_from_yum(void)

   281 {

   282 	struct yum_context ctx;

   283 	void *buf;

   284 	int len, ret;

   285 	gzFile primary, filelists;

   286 	XML_ParsingStatus status;

   287 

   288 	ctx.importer = razor_importer_new();

   289 	ctx.state = YUM_STATE_BEGIN;

   290 

   291 	ctx.primary_parser = XML_ParserCreate(NULL);

   292 	XML_SetUserData(ctx.primary_parser, &ctx);

   293 	XML_SetElementHandler(ctx.primary_parser,

   294 			      yum_primary_start_element,

   295 			      yum_primary_end_element);

   296 	XML_SetCharacterDataHandler(ctx.primary_parser,

   297 				    yum_character_data);

   298 

   299 	ctx.filelists_parser = XML_ParserCreate(NULL);

   300 	XML_SetUserData(ctx.filelists_parser, &ctx);

   301 	XML_SetElementHandler(ctx.filelists_parser,

   302 			      yum_filelists_start_element,

   303 			      yum_filelists_end_element);

   304 	XML_SetCharacterDataHandler(ctx.filelists_parser,

   305 				    yum_character_data);

   306 

   307 	primary = gzopen("primary.xml.gz", "rb");

   308 	if (primary == NULL)

   309 		return NULL;

   310 	filelists = gzopen("filelists.xml.gz", "rb");

   311 	if (filelists == NULL)

   312 		return NULL;

   313 

   314 	ctx.current_parser = ctx.primary_parser;

   315 

   316 	do {

   317 		XML_GetParsingStatus(ctx.current_parser, &status);

   318 		switch (status.parsing) {

   319 		case XML_SUSPENDED:

   320 			ret = XML_ResumeParser(ctx.current_parser);

   321 			break;

   322 		case XML_PARSING:

   323 		case XML_INITIALIZED:

   324 			buf = XML_GetBuffer(ctx.current_parser,

   325 					    XML_BUFFER_SIZE);

   326 			if (ctx.current_parser == ctx.primary_parser)

   327 				len = gzread(primary, buf, XML_BUFFER_SIZE);

   328 			else

   329 				len = gzread(filelists, buf, XML_BUFFER_SIZE);

   330 			if (len < 0) {

   331 				fprintf(stderr,

   332 					"couldn't read input: %s\n",

   333 					strerror(errno));

   334 				return NULL;

   335 			}

   336 

   337 			XML_ParseBuffer(ctx.current_parser, len, len == 0);

   338 			break;

   339 		case XML_FINISHED:

   340 			break;

   341 		}

   342 	} while (status.parsing != XML_FINISHED);

   343 

   344 

   345 	XML_ParserFree(ctx.primary_parser);

   346 	XML_ParserFree(ctx.filelists_parser);

   347 

   348 	gzclose(primary);

   349 	gzclose(filelists);

   350 

   351 	return razor_importer_finish(ctx.importer);

   352 }
razor