1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <errno.h> 6 #include <unistd.h> 7 #include <sys/types.h> 8 #include <sys/stat.h> 9 10 #include "base/logging.h" 11 #include "components/nacl/loader/nonsfi/abi_conversion.h" 12 #include "components/nacl/loader/nonsfi/irt_interfaces.h" 13 #include "components/nacl/loader/nonsfi/irt_util.h" 14 #include "native_client/src/trusted/service_runtime/include/sys/dirent.h" 15 #include "native_client/src/trusted/service_runtime/include/sys/stat.h" 16 #include "native_client/src/trusted/service_runtime/include/sys/unistd.h" 17 18 namespace nacl { 19 namespace nonsfi { 20 namespace { 21 22 int IrtClose(int fd) { 23 return CheckError(close(fd)); 24 } 25 26 int IrtDup(int fd, int* newfd) { 27 return CheckErrorWithResult(dup(fd), newfd); 28 } 29 30 int IrtDup2(int fd, int newfd) { 31 return CheckError(dup2(fd, newfd)); 32 } 33 34 int IrtRead(int fd, void* buf, size_t count, size_t* nread) { 35 return CheckErrorWithResult(read(fd, buf, count), nread); 36 } 37 38 int IrtWrite(int fd, const void* buf, size_t count, size_t* nwrote) { 39 return CheckErrorWithResult(write(fd, buf, count), nwrote); 40 } 41 42 int IrtSeek(int fd, nacl_abi_off_t offset, int whence, 43 nacl_abi_off_t* new_offset) { 44 return CheckErrorWithResult(lseek(fd, offset, whence), new_offset); 45 } 46 47 int IrtFstat(int fd, struct nacl_abi_stat* st) { 48 struct stat host_st; 49 if (fstat(fd, &host_st)) 50 return errno; 51 52 StatToNaClAbiStat(host_st, st); 53 return 0; 54 } 55 56 int IrtGetDents(int fd, struct nacl_abi_dirent* buf, size_t count, 57 size_t* nread) { 58 // Note: getdents() can return several directory entries in packed format. 59 // So, here, because we need to convert the abi from host's to nacl's, 60 // there is no straightforward way to ensure reading only entries which can 61 // be fit to the buf after abi conversion actually. 62 // TODO(https://code.google.com/p/nativeclient/issues/detail?id=3734): 63 // Implement this method. 64 return ENOSYS; 65 } 66 67 } // namespace 68 69 // For seek, fstat and getdents, their argument types should be nacl_abi_X, 70 // rather than host type, such as off_t, struct stat or struct dirent. 71 // However, the definition of nacl_irt_fdio uses host types, so here we need 72 // to cast them. 73 const nacl_irt_fdio kIrtFdIO = { 74 IrtClose, 75 IrtDup, 76 IrtDup2, 77 IrtRead, 78 IrtWrite, 79 reinterpret_cast<int(*)(int, off_t, int, off_t*)>(IrtSeek), 80 reinterpret_cast<int(*)(int, struct stat*)>(IrtFstat), 81 reinterpret_cast<int(*)(int, struct dirent*, size_t, size_t*)>(IrtGetDents), 82 }; 83 84 } // namespace nonsfi 85 } // namespace nacl 86
