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1 /*
2  *
3  * Copyright 2017 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #include <grpc/support/port_platform.h>
20 
21 #include "src/core/lib/iomgr/gethostname.h"
22 #include "src/core/lib/iomgr/port.h"
23 
24 #ifdef GRPC_POSIX_SYSCONF
25 
26 #include <unistd.h>
27 
28 #include <grpc/support/alloc.h>
29 
grpc_gethostname()30 char* grpc_gethostname() {
31   size_t host_name_max = (size_t)sysconf(_SC_HOST_NAME_MAX);
32   char* hostname = (char*)gpr_malloc(host_name_max);
33   if (gethostname(hostname, host_name_max) != 0) {
34     gpr_free(hostname);
35     return nullptr;
36   }
37   return hostname;
38 }
39 
40 #endif  // GRPC_POSIX_SYSCONF
41