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/port.h" 22 #include "src/core/util/gethostname.h" 23 24 #ifdef GRPC_POSIX_SYSCONF 25 26 #include <grpc/support/alloc.h> 27 #include <unistd.h> 28 grpc_gethostname()29char* grpc_gethostname() { 30 size_t host_name_max = (size_t)sysconf(_SC_HOST_NAME_MAX); 31 char* hostname = (char*)gpr_malloc(host_name_max); 32 if (gethostname(hostname, host_name_max) != 0) { 33 gpr_free(hostname); 34 return nullptr; 35 } 36 return hostname; 37 } 38 39 #endif // GRPC_POSIX_SYSCONF 40