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/*
* SPDX-FileCopyrightText: 2014 EfficiOS Inc.
*
* SPDX-License-Identifier: LGPL-2.1-only
*
*/
/*
* This script validate and xml from an xsd.
* argv[1] Path of the xsd
* argv[2] Path to the XML to be validated
*/
#include <common/macros.hpp>
#include <lttng/lttng-error.h>
#include <ctype.h>
#include <dirent.h>
#include <inttypes.h>
#include <libxml/parser.h>
#include <libxml/xmlschemas.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
namespace {
struct validation_ctx {
xmlSchemaParserCtxtPtr parser_ctx;
xmlSchemaPtr schema;
xmlSchemaValidCtxtPtr schema_validation_ctx;
};
} /* namespace */
enum command_err_code { CMD_SUCCESS = 0, CMD_ERROR };
static ATTR_FORMAT_PRINTF(2, 3) void xml_error_handler(void *ctx __attribute__((unused)),
const char *format,
...)
{
char *err_msg;
va_list args;
int ret;
va_start(args, format);
ret = vasprintf(&err_msg, format, args);
va_end(args);
if (ret == -1) {
fprintf(stderr, "ERR: %s\n", "String allocation failed in xml error handle");
return;
}
fprintf(stderr, "XML Error: %s\n", err_msg);
free(err_msg);
}
static void fini_validation_ctx(struct validation_ctx *ctx)
{
if (ctx->parser_ctx) {
xmlSchemaFreeParserCtxt(ctx->parser_ctx);
}
if (ctx->schema) {
xmlSchemaFree(ctx->schema);
}
if (ctx->schema_validation_ctx) {
xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx);
}
memset(ctx, 0, sizeof(struct validation_ctx));
}
static int init_validation_ctx(struct validation_ctx *ctx, char *xsd_path)
{
int ret;
if (!xsd_path) {
ret = -LTTNG_ERR_NOMEM;
goto end;
}
ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path);
if (!ctx->parser_ctx) {
ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
goto end;
}
xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, xml_error_handler, nullptr);
ctx->schema = xmlSchemaParse(ctx->parser_ctx);
if (!ctx->schema) {
ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
goto end;
}
ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema);
if (!ctx->schema_validation_ctx) {
ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
goto end;
}
xmlSchemaSetValidErrors(
ctx->schema_validation_ctx, xml_error_handler, xml_error_handler, nullptr);
ret = 0;
end:
if (ret) {
fini_validation_ctx(ctx);
}
return ret;
}
static int validate_xml(const char *xml_file_path, struct validation_ctx *ctx)
{
int ret;
xmlDocPtr doc = nullptr;
LTTNG_ASSERT(xml_file_path);
LTTNG_ASSERT(ctx);
/* Open the document */
doc = xmlParseFile(xml_file_path);
if (!doc) {
ret = LTTNG_ERR_MI_IO_FAIL;
goto end;
}
/* Validate against the validation ctx (xsd) */
ret = xmlSchemaValidateDoc(ctx->schema_validation_ctx, doc);
if (ret) {
fprintf(stderr, "ERR: %s\n", "XML is not valid againt provided XSD");
ret = CMD_ERROR;
goto end;
}
ret = CMD_SUCCESS;
end:
if (doc) {
xmlFreeDoc(doc);
}
return ret;
}
int main(int argc, char **argv)
{
int ret;
struct validation_ctx ctx = {};
/* Check if we have all argument */
if (argc < 3) {
fprintf(stderr, "ERR: %s\n", "Missing arguments");
ret = CMD_ERROR;
goto end;
}
/* Check if xsd file exist */
ret = access(argv[1], F_OK);
if (ret < 0) {
fprintf(stderr, "ERR: %s\n", "Xsd path not valid");
goto end;
}
/* Check if xml to validate exist */
ret = access(argv[2], F_OK);
if (ret < 0) {
fprintf(stderr, "ERR: %s\n", "XML path not valid");
goto end;
}
/* initialize the validation ctx */
ret = init_validation_ctx(&ctx, argv[1]);
if (ret) {
goto end;
}
ret = validate_xml(argv[2], &ctx);
fini_validation_ctx(&ctx);
end:
return ret;
}
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