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src/import-yum.c
author J. Ali Harlow <ali@juiblex.co.uk>
Sat Aug 23 16:07:09 2014 +0100 (2014-08-23)
changeset 441 cf499fd51df7
parent 418 33b825d3128d
child 442 c4bcba8023a9
permissions -rw-r--r--
Drop drive letter from path to razor root when RAZOR_ROOT set.

If the RAZOR_ROOT environment variable was set to eg., /root then on
Microsoft Windows we were trying to use paths such as /rootC:/Programs
which is obviously wrong. Instead we should drop the drive letter
giving paths of the form /root/Programs. Note that the drive letter is
_not_ migrated to C:/root/Programs: If a root of C:/root was desired
then RAZOR_ROOT would have been set to C:/root. 
     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 "config.h"

    23 #include <string.h>

    24 #include <stdio.h>

    25 #include <stdint.h>

    26 #include <sys/stat.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 	int total, current;

    67 };

    68 

    69 static uint32_t

    70 yum_to_razor_relation (const char *flags)

    71 {

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

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

    74 			return RAZOR_PROPERTY_LESS;

    75 		else

    76 			return RAZOR_PROPERTY_LESS | RAZOR_PROPERTY_EQUAL;

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

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

    79 			return RAZOR_PROPERTY_GREATER;

    80 		else

    81 			return RAZOR_PROPERTY_GREATER | RAZOR_PROPERTY_EQUAL;

    82 	} else

    83 		return RAZOR_PROPERTY_EQUAL;

    84 }

    85 

    86 static void

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

    88 {

    89 	struct yum_context *ctx = data;

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

    91 	char buffer[128];

    92 	uint32_t pre, relation, flags;

    93 	int i;

    94 

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

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

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

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

    99 		}

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

   101 		ctx->state = YUM_STATE_PACKAGE_NAME;

   102 		ctx->p = ctx->name;

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

   104 		ctx->state = YUM_STATE_PACKAGE_ARCH;

   105 		ctx->p = ctx->arch;

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

   107 		epoch = NULL;

   108 		version = NULL;

   109 		release = NULL;

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

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

   112 				epoch = atts[i + 1];

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

   114 				version = atts[i + 1];

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

   116 				release = atts[i + 1];

   117 		}

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

   119 			fprintf(stderr, "invalid version tag, "

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

   121 			return;

   122 		}

   123 

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

   125 		razor_importer_begin_package(ctx->importer,

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

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

   128 		ctx->p = ctx->summary;

   129 		ctx->state = YUM_STATE_SUMMARY;

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

   131 		ctx->p = ctx->description;

   132 		ctx->state = YUM_STATE_DESCRIPTION;

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

   134 		ctx->p = ctx->url;

   135 		ctx->state = YUM_STATE_URL;

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

   137 		ctx->p = ctx->pkgid;

   138 		ctx->state = YUM_STATE_CHECKSUM;

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

   140 		ctx->p = ctx->license;

   141 		ctx->state = YUM_STATE_LICENSE;

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

   143 		ctx->state = YUM_STATE_REQUIRES;

   144 		ctx->property_type = RAZOR_PROPERTY_REQUIRES;

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

   146 		ctx->state = YUM_STATE_PROVIDES;

   147 		ctx->property_type = RAZOR_PROPERTY_PROVIDES;

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

   149 		ctx->state = YUM_STATE_OBSOLETES;

   150 		ctx->property_type = RAZOR_PROPERTY_OBSOLETES;

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

   152 		ctx->state = YUM_STATE_CONFLICTS;

   153 		ctx->property_type = RAZOR_PROPERTY_CONFLICTS;

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

   155 		   ctx->state != YUM_STATE_BEGIN) {

   156 		n = NULL;

   157 		epoch = NULL;

   158 		version = NULL;

   159 		release = NULL;

   160 		relation = RAZOR_PROPERTY_EQUAL;

   161 		pre = 0;

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

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

   164 				n = atts[i + 1];

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

   166 				epoch = atts[i + 1];

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

   168 				version = atts[i + 1];

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

   170 				release = atts[i + 1];

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

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

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

   174 				pre = RAZOR_PROPERTY_PRE;

   175 		}

   176 

   177 		if (n == NULL) {

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

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

   180 			return;

   181 		}

   182 

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

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

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

   186 	}

   187 }

   188 

   189 static void

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

   191 {

   192 	struct yum_context *ctx = data;

   193 

   194 	switch (ctx->state) {

   195 	case YUM_STATE_PACKAGE_NAME:

   196 	case YUM_STATE_PACKAGE_ARCH:

   197 	case YUM_STATE_SUMMARY:

   198 	case YUM_STATE_DESCRIPTION:

   199 	case YUM_STATE_URL:

   200 	case YUM_STATE_LICENSE:

   201 	case YUM_STATE_CHECKSUM:

   202 	case YUM_STATE_FILE:

   203 		ctx->state = YUM_STATE_BEGIN;

   204 		break;

   205 	}

   206 

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

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

   209 					   ctx->description, ctx->url,

   210 					   ctx->license);

   211 

   212 		XML_StopParser(ctx->current_parser, XML_TRUE);

   213 		ctx->current_parser = ctx->filelists_parser;

   214 

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

   216 		fflush(stdout);

   217 	}

   218 }

   219 

   220 static void

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

   222 {

   223 	struct yum_context *ctx = data;

   224 

   225 	switch (ctx->state) {

   226 	case YUM_STATE_PACKAGE_NAME:

   227 	case YUM_STATE_PACKAGE_ARCH:

   228 	case YUM_STATE_SUMMARY:

   229 	case YUM_STATE_DESCRIPTION:

   230 	case YUM_STATE_URL:

   231 	case YUM_STATE_LICENSE:

   232 	case YUM_STATE_CHECKSUM:

   233 	case YUM_STATE_FILE:

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

   235 		ctx->p += len;

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

   237 		break;

   238 	}

   239 }

   240 

   241 static void

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

   243 {

   244 	struct yum_context *ctx = data;

   245 	const char *pkg, *pkgid;

   246 	int i;

   247 

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

   249 		pkg = NULL;

   250 		pkgid = NULL;

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

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

   253 				pkg = atts[i + 1];

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

   255 				pkgid = atts[i + 1];

   256 		}

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

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

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

   260 				pkg, pkgid, ctx->pkgid);

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

   262 		ctx->state = YUM_STATE_FILE;

   263 		ctx->p = ctx->buffer;

   264 	}

   265 }

   266 

   267 

   268 static void

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

   270 {

   271 	struct yum_context *ctx = data;

   272 

   273 	ctx->state = YUM_STATE_BEGIN;

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

   275 		XML_StopParser(ctx->current_parser, XML_TRUE);

   276 		ctx->current_parser = ctx->primary_parser;

   277 		razor_importer_finish_package(ctx->importer);

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

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

   280 

   281 }

   282 

   283 #define XML_BUFFER_SIZE 4096

   284 

   285 struct razor_set *

   286 razor_set_create_from_yum(void)

   287 {

   288 	struct yum_context ctx={0};

   289 	void *buf;

   290 	int len, ret;

   291 	gzFile primary, filelists;

   292 	XML_ParsingStatus status;

   293 

   294 	ctx.importer = razor_importer_create();

   295 	ctx.state = YUM_STATE_BEGIN;

   296 

   297 	ctx.primary_parser = XML_ParserCreate(NULL);

   298 	XML_SetUserData(ctx.primary_parser, &ctx);

   299 	XML_SetElementHandler(ctx.primary_parser,

   300 			      yum_primary_start_element,

   301 			      yum_primary_end_element);

   302 	XML_SetCharacterDataHandler(ctx.primary_parser,

   303 				    yum_character_data);

   304 

   305 	ctx.filelists_parser = XML_ParserCreate(NULL);

   306 	XML_SetUserData(ctx.filelists_parser, &ctx);

   307 	XML_SetElementHandler(ctx.filelists_parser,

   308 			      yum_filelists_start_element,

   309 			      yum_filelists_end_element);

   310 	XML_SetCharacterDataHandler(ctx.filelists_parser,

   311 				    yum_character_data);

   312 

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

   314 	if (primary == NULL)

   315 		return NULL;

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

   317 	if (filelists == NULL)

   318 		return NULL;

   319 

   320 	ctx.current_parser = ctx.primary_parser;

   321 

   322 	ctx.current = 0;

   323 

   324 	do {

   325 		XML_GetParsingStatus(ctx.current_parser, &status);

   326 		switch (status.parsing) {

   327 		case XML_SUSPENDED:

   328 			ret = XML_ResumeParser(ctx.current_parser);

   329 			break;

   330 		case XML_PARSING:

   331 		case XML_INITIALIZED:

   332 			buf = XML_GetBuffer(ctx.current_parser,

   333 					    XML_BUFFER_SIZE);

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

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

   336 			else

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

   338 			if (len < 0) {

   339 				fprintf(stderr,

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

   341 					strerror(errno));

   342 				return NULL;

   343 			}

   344 

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

   346 			break;

   347 		case XML_FINISHED:

   348 			break;

   349 		}

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

   351 

   352 

   353 	XML_ParserFree(ctx.primary_parser);

   354 	XML_ParserFree(ctx.filelists_parser);

   355 

   356 	gzclose(primary);

   357 	gzclose(filelists);

   358 

   359 	printf ("\nsaving\n");

   360 	return razor_importer_finish(ctx.importer);

   361 }
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