1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "sysdeps/errno.h" 18 19 #include <errno.h> 20 21 #include <thread> 22 #include <unordered_map> 23 #include <utility> 24 25 #include "adb.h" 26 27 // Use the linux asm-generic values for errno (which are used on all android architectures). 28 #define ERRNO_VALUES() \ 29 ERRNO_VALUE(EACCES, 13); \ 30 ERRNO_VALUE(EEXIST, 17); \ 31 ERRNO_VALUE(EFAULT, 14); \ 32 ERRNO_VALUE(EFBIG, 27); \ 33 ERRNO_VALUE(EINTR, 4); \ 34 ERRNO_VALUE(EINVAL, 22); \ 35 ERRNO_VALUE(EIO, 5); \ 36 ERRNO_VALUE(EISDIR, 21); \ 37 ERRNO_VALUE(ELOOP, 40); \ 38 ERRNO_VALUE(EMFILE, 24); \ 39 ERRNO_VALUE(ENAMETOOLONG, 36); \ 40 ERRNO_VALUE(ENFILE, 23); \ 41 ERRNO_VALUE(ENOENT, 2); \ 42 ERRNO_VALUE(ENOMEM, 12); \ 43 ERRNO_VALUE(ENOSPC, 28); \ 44 ERRNO_VALUE(ENOTDIR, 20); \ 45 ERRNO_VALUE(EOVERFLOW, 75); \ 46 ERRNO_VALUE(EPERM, 1); \ 47 ERRNO_VALUE(EROFS, 30); \ 48 ERRNO_VALUE(ETXTBSY, 26) 49 50 // Make sure these values are actually correct. 51 #if defined(__linux__) 52 #define ERRNO_VALUE(error_name, wire_value) static_assert((error_name) == (wire_value), "") 53 ERRNO_VALUES(); 54 #undef ERRNO_VALUE 55 #endif 56 57 static std::unordered_map<int, int>* generate_host_to_wire() { 58 auto result = new std::unordered_map<int, int>(); 59 #define ERRNO_VALUE(error_name, wire_value) \ 60 result->insert(std::make_pair((error_name), (wire_value))) 61 ERRNO_VALUES(); 62 #undef ERRNO_VALUE 63 return result; 64 } 65 66 static std::unordered_map<int, int>* generate_wire_to_host() { 67 auto result = new std::unordered_map<int, int>(); 68 #define ERRNO_VALUE(error_name, wire_value) \ 69 result->insert(std::make_pair((wire_value), (error_name))) 70 ERRNO_VALUES(); 71 #undef ERRNO_VALUE 72 return result; 73 } 74 75 static std::unordered_map<int, int>& host_to_wire = *generate_host_to_wire(); 76 static std::unordered_map<int, int>& wire_to_host = *generate_wire_to_host(); 77 78 int errno_to_wire(int error) { 79 auto it = host_to_wire.find(error); 80 if (it == host_to_wire.end()) { 81 LOG(ERROR) << "failed to convert errno " << error << " (" << strerror(error) << ") to wire"; 82 83 // Return EIO; 84 return 5; 85 } 86 return it->second; 87 } 88 89 int errno_from_wire(int error) { 90 auto it = host_to_wire.find(error); 91 if (it == host_to_wire.end()) { 92 LOG(ERROR) << "failed to convert errno " << error << " from wire"; 93 return EIO; 94 } 95 return it->second; 96 } 97