f710e00d26
The libuuid library is widely available (part of util-linux) and much more frequently updated. The OSSP UUID library works great, but was last updated in 2008 and causes some confusion for users that have libuuid.
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include "config.h"
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#include "guacamole/error.h"
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#include "id.h"
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#if defined(HAVE_LIBUUID)
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#include <uuid/uuid.h>
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#elif defined(HAVE_OSSP_UUID_H)
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#include <ossp/uuid.h>
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#else
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#include <uuid.h>
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#endif
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#include <stdlib.h>
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/**
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* The length of a UUID in bytes. All UUIDs are guaranteed to be 36 1-byte
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* characters long.
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*/
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#define GUAC_UUID_LEN 36
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char* guac_generate_id(char prefix) {
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char* buffer;
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char* identifier;
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/* Prepare object to receive generated UUID */
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#ifdef HAVE_LIBUUID
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uuid_t uuid;
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#else
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uuid_t* uuid;
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if (uuid_create(&uuid) != UUID_RC_OK) {
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guac_error = GUAC_STATUS_NO_MEMORY;
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guac_error_message = "Could not allocate memory for UUID";
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return NULL;
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}
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#endif
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/* Generate unique identifier */
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#ifdef HAVE_LIBUUID
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uuid_generate(uuid);
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#else
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if (uuid_make(uuid, UUID_MAKE_V4) != UUID_RC_OK) {
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uuid_destroy(uuid);
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guac_error = GUAC_STATUS_NO_MEMORY;
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guac_error_message = "UUID generation failed";
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return NULL;
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}
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#endif
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/* Allocate buffer for future formatted ID */
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buffer = malloc(GUAC_UUID_LEN + 2);
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if (buffer == NULL) {
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#ifndef HAVE_LIBUUID
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uuid_destroy(uuid);
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#endif
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guac_error = GUAC_STATUS_NO_MEMORY;
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guac_error_message = "Could not allocate memory for unique ID";
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return NULL;
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}
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identifier = &(buffer[1]);
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/* Convert UUID to string to produce unique identifier */
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#ifdef HAVE_LIBUUID
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uuid_unparse_lower(uuid, identifier);
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#else
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size_t identifier_length = GUAC_UUID_LEN + 1;
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if (uuid_export(uuid, UUID_FMT_STR, &identifier, &identifier_length) != UUID_RC_OK) {
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free(buffer);
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uuid_destroy(uuid);
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guac_error = GUAC_STATUS_INTERNAL_ERROR;
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guac_error_message = "Conversion of UUID to unique ID failed";
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return NULL;
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}
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/* Clean up generated UUID */
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uuid_destroy(uuid);
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#endif
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buffer[0] = prefix;
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buffer[GUAC_UUID_LEN + 1] = '\0';
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return buffer;
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}
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