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()30char* 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