| 1 | /* |
| 2 | * Copyright (C) 2014 EfficiOS Inc. |
| 3 | * |
| 4 | * SPDX-License-Identifier: LGPL-2.1-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * This script validate and xml from an xsd. |
| 10 | * argv[1] Path of the xsd |
| 11 | * argv[2] Path to the XML to be validated |
| 12 | */ |
| 13 | |
| 14 | #include <ctype.h> |
| 15 | #include <stdio.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <string.h> |
| 18 | #include <inttypes.h> |
| 19 | #include <dirent.h> |
| 20 | #include <unistd.h> |
| 21 | #include <sys/types.h> |
| 22 | #include <sys/stat.h> |
| 23 | |
| 24 | #include <libxml/xmlschemas.h> |
| 25 | #include <libxml/parser.h> |
| 26 | |
| 27 | #include <lttng/lttng-error.h> |
| 28 | #include <common/macros.hpp> |
| 29 | |
| 30 | namespace { |
| 31 | struct validation_ctx { |
| 32 | xmlSchemaParserCtxtPtr parser_ctx; |
| 33 | xmlSchemaPtr schema; |
| 34 | xmlSchemaValidCtxtPtr schema_validation_ctx; |
| 35 | }; |
| 36 | } /* namespace */ |
| 37 | |
| 38 | enum command_err_code { |
| 39 | CMD_SUCCESS = 0, |
| 40 | CMD_ERROR |
| 41 | }; |
| 42 | |
| 43 | static ATTR_FORMAT_PRINTF(2, 3) |
| 44 | void xml_error_handler(void *ctx __attribute__((unused)), |
| 45 | const char *format, ...) |
| 46 | { |
| 47 | char *err_msg; |
| 48 | va_list args; |
| 49 | int ret; |
| 50 | |
| 51 | va_start(args, format); |
| 52 | ret = vasprintf(&err_msg, format, args); |
| 53 | va_end(args); |
| 54 | if (ret == -1) { |
| 55 | fprintf(stderr, "ERR: %s\n", |
| 56 | "String allocation failed in xml error handle"); |
| 57 | return; |
| 58 | } |
| 59 | |
| 60 | fprintf(stderr, "XML Error: %s\n", err_msg); |
| 61 | free(err_msg); |
| 62 | } |
| 63 | |
| 64 | static |
| 65 | void fini_validation_ctx( |
| 66 | struct validation_ctx *ctx) |
| 67 | { |
| 68 | if (ctx->parser_ctx) { |
| 69 | xmlSchemaFreeParserCtxt(ctx->parser_ctx); |
| 70 | } |
| 71 | |
| 72 | if (ctx->schema) { |
| 73 | xmlSchemaFree(ctx->schema); |
| 74 | } |
| 75 | |
| 76 | if (ctx->schema_validation_ctx) { |
| 77 | xmlSchemaFreeValidCtxt(ctx->schema_validation_ctx); |
| 78 | } |
| 79 | |
| 80 | memset(ctx, 0, sizeof(struct validation_ctx)); |
| 81 | } |
| 82 | |
| 83 | static |
| 84 | int init_validation_ctx( |
| 85 | struct validation_ctx *ctx, char *xsd_path) |
| 86 | { |
| 87 | int ret; |
| 88 | |
| 89 | if (!xsd_path) { |
| 90 | ret = -LTTNG_ERR_NOMEM; |
| 91 | goto end; |
| 92 | } |
| 93 | |
| 94 | ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path); |
| 95 | if (!ctx->parser_ctx) { |
| 96 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 97 | goto end; |
| 98 | } |
| 99 | xmlSchemaSetParserErrors(ctx->parser_ctx, xml_error_handler, |
| 100 | xml_error_handler, NULL); |
| 101 | |
| 102 | ctx->schema = xmlSchemaParse(ctx->parser_ctx); |
| 103 | if (!ctx->schema) { |
| 104 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 105 | goto end; |
| 106 | } |
| 107 | |
| 108 | ctx->schema_validation_ctx = xmlSchemaNewValidCtxt(ctx->schema); |
| 109 | if (!ctx->schema_validation_ctx) { |
| 110 | ret = -LTTNG_ERR_LOAD_INVALID_CONFIG; |
| 111 | goto end; |
| 112 | } |
| 113 | |
| 114 | xmlSchemaSetValidErrors(ctx->schema_validation_ctx, xml_error_handler, |
| 115 | xml_error_handler, NULL); |
| 116 | ret = 0; |
| 117 | |
| 118 | end: |
| 119 | if (ret) { |
| 120 | fini_validation_ctx(ctx); |
| 121 | } |
| 122 | return ret; |
| 123 | } |
| 124 | |
| 125 | static int validate_xml(const char *xml_file_path, struct validation_ctx *ctx) |
| 126 | { |
| 127 | int ret; |
| 128 | xmlDocPtr doc = NULL; |
| 129 | |
| 130 | LTTNG_ASSERT(xml_file_path); |
| 131 | LTTNG_ASSERT(ctx); |
| 132 | |
| 133 | /* Open the document */ |
| 134 | doc = xmlParseFile(xml_file_path); |
| 135 | if (!doc) { |
| 136 | ret = LTTNG_ERR_MI_IO_FAIL; |
| 137 | goto end; |
| 138 | } |
| 139 | |
| 140 | /* Validate against the validation ctx (xsd) */ |
| 141 | ret = xmlSchemaValidateDoc(ctx->schema_validation_ctx, doc); |
| 142 | if (ret) { |
| 143 | fprintf(stderr, "ERR: %s\n", "XML is not valid againt provided XSD"); |
| 144 | ret = CMD_ERROR; |
| 145 | goto end; |
| 146 | } |
| 147 | |
| 148 | ret = CMD_SUCCESS; |
| 149 | end: |
| 150 | if (doc) { |
| 151 | xmlFreeDoc(doc); |
| 152 | } |
| 153 | return ret; |
| 154 | } |
| 155 | |
| 156 | int main(int argc, char **argv) |
| 157 | { |
| 158 | int ret; |
| 159 | struct validation_ctx ctx = {}; |
| 160 | |
| 161 | /* Check if we have all argument */ |
| 162 | if (argc < 3) { |
| 163 | fprintf(stderr, "ERR: %s\n", "Missing arguments"); |
| 164 | ret = CMD_ERROR; |
| 165 | goto end; |
| 166 | } |
| 167 | |
| 168 | /* Check if xsd file exist */ |
| 169 | ret = access(argv[1], F_OK); |
| 170 | if (ret < 0) { |
| 171 | fprintf(stderr, "ERR: %s\n", "Xsd path not valid"); |
| 172 | goto end; |
| 173 | } |
| 174 | |
| 175 | /* Check if xml to validate exist */ |
| 176 | ret = access(argv[2], F_OK); |
| 177 | if (ret < 0) { |
| 178 | fprintf(stderr, "ERR: %s\n", "XML path not valid"); |
| 179 | goto end; |
| 180 | } |
| 181 | |
| 182 | /* initialize the validation ctx */ |
| 183 | ret = init_validation_ctx(&ctx, argv[1]); |
| 184 | if (ret) { |
| 185 | goto end; |
| 186 | } |
| 187 | |
| 188 | ret = validate_xml(argv[2], &ctx); |
| 189 | |
| 190 | fini_validation_ctx(&ctx); |
| 191 | |
| 192 | end: |
| 193 | return ret; |
| 194 | } |