76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/****************************************************************************
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* apps/system/hostname/hostname_main.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int main(int argc, FAR char *argv[])
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{
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int ret;
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char hostname[HOST_NAME_MAX + 1];
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if (argc > 1)
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{
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if (argc > 2)
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{
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fprintf(stderr, "ERROR: Too many arguments\n");
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return EXIT_FAILURE;
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}
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ret = sethostname(argv[1], strlen(argv[1]));
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if (ret != 0)
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{
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printf("sethostname() returned %d\n", ret);
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return EXIT_FAILURE;
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}
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}
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else
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{
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ret = gethostname(hostname, HOST_NAME_MAX);
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if (ret != 0)
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{
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printf("gethostname() returned %d\n", ret);
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return EXIT_FAILURE;
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}
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printf("%s\n", hostname);
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}
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return EXIT_SUCCESS;
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}
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