cd7157784e
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1161332 13f79535-47bb-0310-9956-ffa450edef68
68 lines
1.9 KiB
C
68 lines
1.9 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "hdfs.h"
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int main(int argc, char **argv) {
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if (argc != 4) {
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fprintf(stderr, "Usage: hdfs_read <filename> <filesize> <buffersize>\n");
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exit(-1);
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}
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hdfsFS fs = hdfsConnect("default", 0);
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if (!fs) {
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fprintf(stderr, "Oops! Failed to connect to hdfs!\n");
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exit(-1);
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}
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const char* rfile = argv[1];
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tSize fileTotalSize = strtoul(argv[2], NULL, 10);
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tSize bufferSize = strtoul(argv[3], NULL, 10);
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hdfsFile readFile = hdfsOpenFile(fs, rfile, O_RDONLY, bufferSize, 0, 0);
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if (!readFile) {
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fprintf(stderr, "Failed to open %s for writing!\n", rfile);
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exit(-2);
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}
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// data to be written to the file
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char* buffer = malloc(sizeof(char) * bufferSize);
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if(buffer == NULL) {
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return -2;
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}
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// read from the file
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tSize curSize = bufferSize;
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for (; curSize == bufferSize;) {
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curSize = hdfsRead(fs, readFile, (void*)buffer, curSize);
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}
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free(buffer);
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hdfsCloseFile(fs, readFile);
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hdfsDisconnect(fs);
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return 0;
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}
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/**
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* vim: ts=4: sw=4: et:
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*/
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