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src/import-yum.c
author J. Ali Harlow <ali@juiblex.co.uk>
Tue Jan 13 17:04:51 2009 +0000 (2009-01-13)
changeset 347 7538f8dc4425
parent 263 23c56c3f0449
child 394 afe520f454bd
permissions -rw-r--r--
Don't try and stat the installation root if it's the empty string. 
     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 <unistd.h>

    27 #include <fcntl.h>

    28 #include <errno.h>

    29 

    30 #include <expat.h>

    31 #include <zlib.h>

    32 #include "razor.h"

    33 

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

    35 

    36 enum {

    37 	YUM_STATE_BEGIN,

    38 	YUM_STATE_PACKAGE_NAME,

    39 	YUM_STATE_PACKAGE_ARCH,

    40 	YUM_STATE_SUMMARY,

    41 	YUM_STATE_DESCRIPTION,

    42 	YUM_STATE_URL,

    43 	YUM_STATE_LICENSE,

    44 	YUM_STATE_CHECKSUM,

    45 	YUM_STATE_REQUIRES,

    46 	YUM_STATE_PROVIDES,

    47 	YUM_STATE_OBSOLETES,

    48 	YUM_STATE_CONFLICTS,

    49 	YUM_STATE_FILE

    50 };

    51 

    52 struct yum_context {

    53 	XML_Parser primary_parser;

    54 	XML_Parser filelists_parser;

    55 	XML_Parser current_parser;

    56 

    57 	struct razor_importer *importer;

    58 	struct import_property_context *current_property_context;

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

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

    61 	char pkgid[128];

    62 	uint32_t property_type;

    63 	int state;

    64 

    65 	int total, current;

    66 };

    67 

    68 static uint32_t

    69 yum_to_razor_relation (const char *flags)

    70 {

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

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

    73 			return RAZOR_PROPERTY_LESS;

    74 		else

    75 			return RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL;

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

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

    78 			return RAZOR_PROPERTY_GREATER;

    79 		else

    80 			return RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL;

    81 	} else

    82 		return RAZOR_PROPERTY_EQUAL;

    83 }

    84 

    85 static void

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

    87 {

    88 	struct yum_context *ctx = data;

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

    90 	char buffer[128];

    91 	uint32_t pre, relation, flags;

    92 	int i;

    93 

    94 	if (strcmp(name, "metadata") == 0) {

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

    96 			if (strcmp(atts[i], "packages") == 0)

    97 				ctx->total = atoi(atts[i + 1]);

    98 		}

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

   100 		ctx->state = YUM_STATE_PACKAGE_NAME;

   101 		ctx->p = ctx->name;

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

   103 		ctx->state = YUM_STATE_PACKAGE_ARCH;

   104 		ctx->p = ctx->arch;

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

   106 		epoch = NULL;

   107 		version = NULL;

   108 		release = NULL;

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

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

   111 				epoch = atts[i + 1];

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

   113 				version = atts[i + 1];

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

   115 				release = atts[i + 1];

   116 		}

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

   118 			fprintf(stderr, "invalid version tag, "

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

   120 			return;

   121 		}

   122 

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

   124 		razor_importer_begin_package(ctx->importer,

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

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

   127 		ctx->p = ctx->summary;

   128 		ctx->state = YUM_STATE_SUMMARY;

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

   130 		ctx->p = ctx->description;

   131 		ctx->state = YUM_STATE_DESCRIPTION;

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

   133 		ctx->p = ctx->url;

   134 		ctx->state = YUM_STATE_URL;

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

   136 		ctx->p = ctx->pkgid;

   137 		ctx->state = YUM_STATE_CHECKSUM;

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

   139 		ctx->p = ctx->license;

   140 		ctx->state = YUM_STATE_LICENSE;

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

   142 		ctx->state = YUM_STATE_REQUIRES;

   143 		ctx->property_type = RAZOR_PROPERTY_REQUIRES;

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

   145 		ctx->state = YUM_STATE_PROVIDES;

   146 		ctx->property_type = RAZOR_PROPERTY_PROVIDES;

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

   148 		ctx->state = YUM_STATE_OBSOLETES;

   149 		ctx->property_type = RAZOR_PROPERTY_OBSOLETES;

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

   151 		ctx->state = YUM_STATE_CONFLICTS;

   152 		ctx->property_type = RAZOR_PROPERTY_CONFLICTS;

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

   154 		   ctx->state != YUM_STATE_BEGIN) {

   155 		n = NULL;

   156 		epoch = NULL;

   157 		version = NULL;

   158 		release = NULL;

   159 		relation = RAZOR_PROPERTY_EQUAL;

   160 		pre = 0;

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

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

   163 				n = atts[i + 1];

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

   165 				epoch = atts[i + 1];

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

   167 				version = atts[i + 1];

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

   169 				release = atts[i + 1];

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

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

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

   173 				pre = 

   174 					RAZOR_PROPERTY_PRE |

   175 					RAZOR_PROPERTY_POST |

   176 					RAZOR_PROPERTY_PREUN |

   177 					RAZOR_PROPERTY_POSTUN;

   178 		}

   179 

   180 		if (n == NULL) {

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

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

   183 			return;

   184 		}

   185 

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

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

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

   189 	}

   190 }

   191 

   192 static void

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

   194 {

   195 	struct yum_context *ctx = data;

   196 

   197 	switch (ctx->state) {

   198 	case YUM_STATE_PACKAGE_NAME:

   199 	case YUM_STATE_PACKAGE_ARCH:

   200 	case YUM_STATE_SUMMARY:

   201 	case YUM_STATE_DESCRIPTION:

   202 	case YUM_STATE_URL:

   203 	case YUM_STATE_LICENSE:

   204 	case YUM_STATE_CHECKSUM:

   205 	case YUM_STATE_FILE:

   206 		ctx->state = YUM_STATE_BEGIN;

   207 		break;

   208 	}

   209 

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

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

   212 					   ctx->description, ctx->url,

   213 					   ctx->license);

   214 

   215 		XML_StopParser(ctx->current_parser, XML_TRUE);

   216 		ctx->current_parser = ctx->filelists_parser;

   217 

   218 		printf("\rimporting %d/%d", ++ctx->current, ctx->total);

   219 		fflush(stdout);

   220 	}

   221 }

   222 

   223 static void

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

   225 {

   226 	struct yum_context *ctx = data;

   227 

   228 	switch (ctx->state) {

   229 	case YUM_STATE_PACKAGE_NAME:

   230 	case YUM_STATE_PACKAGE_ARCH:

   231 	case YUM_STATE_SUMMARY:

   232 	case YUM_STATE_DESCRIPTION:

   233 	case YUM_STATE_URL:

   234 	case YUM_STATE_LICENSE:

   235 	case YUM_STATE_CHECKSUM:

   236 	case YUM_STATE_FILE:

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

   238 		ctx->p += len;

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

   240 		break;

   241 	}

   242 }

   243 

   244 static void

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

   246 {

   247 	struct yum_context *ctx = data;

   248 	const char *pkg, *pkgid;

   249 	int i;

   250 

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

   252 		pkg = NULL;

   253 		pkgid = NULL;

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

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

   256 				pkg = atts[i + 1];

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

   258 				pkgid = atts[i + 1];

   259 		}

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

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

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

   263 				pkg, pkgid, ctx->pkgid);

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

   265 		ctx->state = YUM_STATE_FILE;

   266 		ctx->p = ctx->buffer;

   267 	}

   268 }

   269 

   270 

   271 static void

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

   273 {

   274 	struct yum_context *ctx = data;

   275 

   276 	ctx->state = YUM_STATE_BEGIN;

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

   278 		XML_StopParser(ctx->current_parser, XML_TRUE);

   279 		ctx->current_parser = ctx->primary_parser;

   280 		razor_importer_finish_package(ctx->importer);

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

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

   283 

   284 }

   285 

   286 #define XML_BUFFER_SIZE 4096

   287 

   288 struct razor_set *

   289 razor_set_create_from_yum(void)

   290 {

   291 	struct yum_context ctx;

   292 	void *buf;

   293 	int len, ret;

   294 	gzFile primary, filelists;

   295 	XML_ParsingStatus status;

   296 

   297 	ctx.importer = razor_importer_create();

   298 	ctx.state = YUM_STATE_BEGIN;

   299 

   300 	ctx.primary_parser = XML_ParserCreate(NULL);

   301 	XML_SetUserData(ctx.primary_parser, &ctx);

   302 	XML_SetElementHandler(ctx.primary_parser,

   303 			      yum_primary_start_element,

   304 			      yum_primary_end_element);

   305 	XML_SetCharacterDataHandler(ctx.primary_parser,

   306 				    yum_character_data);

   307 

   308 	ctx.filelists_parser = XML_ParserCreate(NULL);

   309 	XML_SetUserData(ctx.filelists_parser, &ctx);

   310 	XML_SetElementHandler(ctx.filelists_parser,

   311 			      yum_filelists_start_element,

   312 			      yum_filelists_end_element);

   313 	XML_SetCharacterDataHandler(ctx.filelists_parser,

   314 				    yum_character_data);

   315 

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

   317 	if (primary == NULL)

   318 		return NULL;

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

   320 	if (filelists == NULL)

   321 		return NULL;

   322 

   323 	ctx.current_parser = ctx.primary_parser;

   324 

   325 	ctx.current = 0;

   326 

   327 	do {

   328 		XML_GetParsingStatus(ctx.current_parser, &status);

   329 		switch (status.parsing) {

   330 		case XML_SUSPENDED:

   331 			ret = XML_ResumeParser(ctx.current_parser);

   332 			break;

   333 		case XML_PARSING:

   334 		case XML_INITIALIZED:

   335 			buf = XML_GetBuffer(ctx.current_parser,

   336 					    XML_BUFFER_SIZE);

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

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

   339 			else

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

   341 			if (len < 0) {

   342 				fprintf(stderr,

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

   344 					strerror(errno));

   345 				return NULL;

   346 			}

   347 

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

   349 			break;

   350 		case XML_FINISHED:

   351 			break;

   352 		}

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

   354 

   355 

   356 	XML_ParserFree(ctx.primary_parser);

   357 	XML_ParserFree(ctx.filelists_parser);

   358 

   359 	gzclose(primary);

   360 	gzclose(filelists);

   361 

   362 	printf ("\nsaving\n");

   363 	return razor_importer_finish(ctx.importer);

   364 }
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