#include "il2cpp-config.h"
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#if IL2CPP_TARGET_POSIX
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#include "FileHandle.h"
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#if IL2CPP_USE_POSIX_FILE_PLATFORM_CONFIG
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#include "FilePlatformConfig.h"
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#endif
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#include "il2cpp-vm-support.h"
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#include "os/ErrorCodes.h"
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#include "os/File.h"
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#include "os/Mutex.h"
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#include "os/Posix/Error.h"
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#include "utils/PathUtils.h"
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#include <assert.h>
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#include <fcntl.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <utime.h>
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#include <sys/errno.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <string>
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#define INVALID_FILE_HANDLE (FileHandle*)-1
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#define INVALID_FILE_ATTRIBUTES (UnityPalFileAttributes)((uint32_t)-1)
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#define TIME_ZERO 116444736000000000ULL
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namespace il2cpp
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{
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namespace os
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{
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// Head and tail of linked list.
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static FileHandle* s_fileHandleHead = NULL;
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static FileHandle* s_fileHandleTail = NULL;
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#if IL2CPP_SUPPORT_THREADS
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static FastMutex s_fileHandleMutex;
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#endif
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static void AddFileHandle(FileHandle *fileHandle)
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{
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#if IL2CPP_SUPPORT_THREADS
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FastAutoLock autoLock(&s_fileHandleMutex);
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#endif
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if (s_fileHandleHead == NULL)
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{
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IL2CPP_ASSERT(s_fileHandleTail == NULL);
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s_fileHandleHead = fileHandle;
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s_fileHandleTail = fileHandle;
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}
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else
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{
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IL2CPP_ASSERT(s_fileHandleTail != NULL);
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IL2CPP_ASSERT(s_fileHandleTail->next == NULL);
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s_fileHandleTail->next = fileHandle;
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fileHandle->prev = s_fileHandleTail;
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s_fileHandleTail = fileHandle;
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}
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}
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static void RemoveFileHandle(il2cpp::os::FileHandle *fileHandle)
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{
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#if IL2CPP_SUPPORT_THREADS
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FastAutoLock autoLock(&s_fileHandleMutex);
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#endif
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if (s_fileHandleHead == fileHandle)
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s_fileHandleHead = fileHandle->next;
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if (s_fileHandleTail == fileHandle)
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s_fileHandleTail = fileHandle->prev;
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if (fileHandle->prev)
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fileHandle->prev->next = fileHandle->next;
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if (fileHandle->next)
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fileHandle->next->prev = fileHandle->prev;
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}
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static const FileHandle* FindFileHandle(const struct stat& statBuf)
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{
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#if IL2CPP_SUPPORT_THREADS
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FastAutoLock autoLock(&s_fileHandleMutex);
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#endif
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const dev_t device = statBuf.st_dev;
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const ino_t inode = statBuf.st_ino;
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for (FileHandle *handle = s_fileHandleHead; handle != NULL; handle = handle->next)
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{
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if (handle->device == device && handle->inode == inode)
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return handle;
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}
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return NULL;
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}
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// NOTE:
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// Checking for file sharing violations only works for the current process.
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//
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// Mono implements this feature across processes by storing the file handles as
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// a look up table in a shared file.
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static bool ShareAllowOpen(const struct stat& statBuf, int shareMode, int accessMode)
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{
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const FileHandle *fileHandle = FindFileHandle(statBuf);
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if (fileHandle == NULL) // File is not open
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return true;
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if (fileHandle->shareMode == kFileShareNone)
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return false;
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if (((fileHandle->shareMode == kFileShareRead) && (accessMode != kFileAccessRead)) ||
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((fileHandle->shareMode == kFileShareWrite) && (accessMode != kFileAccessWrite)))
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{
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return false;
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}
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if (((fileHandle->accessMode & kFileAccessRead) && !(shareMode & kFileShareRead)) ||
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((fileHandle->accessMode & kFileAccessWrite) && !(shareMode & kFileShareWrite)))
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{
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return false;
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}
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return true;
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}
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static UnityPalFileAttributes StatToFileAttribute(const std::string& path, struct stat& pathStat, struct stat* linkStat)
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{
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uint32_t fileAttributes = 0;
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if (S_ISSOCK(pathStat.st_mode))
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pathStat.st_mode &= ~S_IFSOCK; // don't consider socket protection
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#if defined(__APPLE__) && defined(__MACH__)
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if ((pathStat.st_flags & UF_IMMUTABLE) || (pathStat.st_flags & SF_IMMUTABLE))
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fileAttributes |= kFileAttributeReadOnly;
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#endif
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const std::string filename(il2cpp::utils::PathUtils::Basename(path));
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if (S_ISDIR(pathStat.st_mode))
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{
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fileAttributes = kFileAttributeDirectory;
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if (!(pathStat.st_mode & S_IWUSR) && !(pathStat.st_mode & S_IWGRP) && !(pathStat.st_mode & S_IWOTH))
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fileAttributes |= kFileAttributeReadOnly;
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if (filename[0] == '.')
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fileAttributes |= kFileAttributeHidden;
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}
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else
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{
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if (!(pathStat.st_mode & S_IWUSR) && !(pathStat.st_mode & S_IWGRP) && !(pathStat.st_mode & S_IWOTH))
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{
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fileAttributes = kFileAttributeReadOnly;
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if (filename[0] == '.')
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fileAttributes |= kFileAttributeHidden;
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}
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else if (filename[0] == '.')
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fileAttributes = kFileAttributeHidden;
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else
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fileAttributes = kFileAttributeNormal;
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}
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if (linkStat != NULL && S_ISLNK(linkStat->st_mode))
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fileAttributes |= kFileAttributeReparse_point;
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return (UnityPalFileAttributes)fileAttributes;
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}
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static int GetStatAndLinkStat(const std::string& path, struct stat& pathStat, struct stat& linkStat)
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{
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const int statResult = stat(path.c_str(), &pathStat);
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if (statResult == -1 && errno == ENOENT && lstat(path.c_str(), &pathStat) != 0) // Might be a dangling symlink...
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return PathErrnoToErrorCode(path, errno);
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if (lstat(path.c_str(), &linkStat) != 0)
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return PathErrnoToErrorCode(path, errno);
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return kErrorCodeSuccess;
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}
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static uint64_t TimeToTicks(time_t timeval)
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{
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return ((uint64_t)timeval * 10000000) + TIME_ZERO;
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}
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static time_t TicksToTime(uint64_t ticks)
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{
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return (ticks - TIME_ZERO) / 10000000;
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}
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static bool InternalCopyFile(int srcFd, int destFd, const struct stat& srcStat, int *error)
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{
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const blksize_t preferedBlockSize = srcStat.st_blksize;
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const blksize_t bufferSize = preferedBlockSize < 8192 ? 8192 : (preferedBlockSize > 65536 ? 65536 : preferedBlockSize);
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char *buffer = new char[bufferSize];
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ssize_t readBytes;
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while ((readBytes = read(srcFd, buffer, bufferSize)) > 0)
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{
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char* writeBuffer = buffer;
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ssize_t writeBytes = readBytes;
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while (writeBytes > 0)
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{
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const ssize_t writtenBytes = write(destFd, writeBuffer, writeBytes);
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if (writtenBytes < 0)
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{
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if (errno == EINTR)
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continue;
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delete[] buffer;
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*error = FileErrnoToErrorCode(errno);
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return false;
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}
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writeBytes -= writtenBytes;
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writeBuffer += writtenBytes;
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}
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}
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delete[] buffer;
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if (readBytes < 0)
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{
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*error = FileErrnoToErrorCode(errno);
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return false;
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}
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IL2CPP_ASSERT(readBytes == 0);
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return true;
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}
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bool File::Isatty(FileHandle* fileHandle)
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{
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return isatty(fileHandle->fd) == 1;
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}
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#if !IL2CPP_PLATFORM_OVERRIDES_STD_FILE_HANDLES
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FileHandle* File::GetStdError()
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{
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static FileHandle* s_handle = NULL;
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if (s_handle)
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return s_handle;
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s_handle = new FileHandle();
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s_handle->fd = 2;
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s_handle->type = kFileTypeChar;
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s_handle->options = 0;
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s_handle->accessMode = kFileAccessReadWrite;
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s_handle->shareMode = -1; // Only used for files
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return s_handle;
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}
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FileHandle* File::GetStdInput()
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{
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static FileHandle* s_handle = NULL;
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if (s_handle)
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return s_handle;
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s_handle = new FileHandle();
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s_handle->fd = 0;
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s_handle->type = kFileTypeChar;
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s_handle->options = 0;
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s_handle->accessMode = kFileAccessRead;
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s_handle->shareMode = -1; // Only used for files
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return s_handle;
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}
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FileHandle* File::GetStdOutput()
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{
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static FileHandle* s_handle = NULL;
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if (s_handle)
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return s_handle;
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s_handle = new FileHandle();
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s_handle->fd = 1;
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s_handle->type = kFileTypeChar;
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s_handle->options = 0;
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s_handle->accessMode = kFileAccessReadWrite;
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s_handle->shareMode = -1; // Only used for files
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return s_handle;
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}
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#endif
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bool File::CreatePipe(FileHandle** read_handle, FileHandle** write_handle)
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{
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int error;
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return File::CreatePipe(read_handle, write_handle, &error);
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}
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bool File::CreatePipe(FileHandle** read_handle, FileHandle** write_handle, int* error)
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{
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int fds[2];
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const int ret = pipe(fds);
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if (ret == -1)
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{
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*error = FileErrnoToErrorCode(errno);
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return false;
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}
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FileHandle *input = new FileHandle();
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input->fd = fds[0];
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input->type = kFileTypePipe;
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input->options = 0;
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input->accessMode = kFileAccessRead;
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input->shareMode = -1; // Only used for files
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FileHandle *output = new FileHandle();
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output->fd = fds[1];
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output->type = kFileTypePipe;
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output->options = 0;
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output->accessMode = kFileAccessReadWrite;
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output->shareMode = -1; // Only used for files
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*read_handle = input;
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*write_handle = output;
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return true;
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}
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UnityPalFileAttributes File::GetFileAttributes(const std::string& path, int *error)
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{
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struct stat pathStat, linkStat;
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*error = GetStatAndLinkStat(path, pathStat, linkStat);
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if (*error != kErrorCodeSuccess)
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return INVALID_FILE_ATTRIBUTES;
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return StatToFileAttribute(path, pathStat, &linkStat);
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}
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bool File::SetFileAttributes(const std::string& path, UnityPalFileAttributes attributes, int* error)
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{
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struct stat pathStat;
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int ret = stat(path.c_str(), &pathStat);
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if (ret != 0)
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{
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*error = PathErrnoToErrorCode(path, errno);
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return false;
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}
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if (attributes & kFileAttributeReadOnly)
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ret = chmod(path.c_str(), pathStat.st_mode & ~(S_IWUSR | S_IWOTH | S_IWGRP));
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else
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ret = chmod(path.c_str(), pathStat.st_mode | S_IWUSR);
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if (ret != 0)
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{
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*error = PathErrnoToErrorCode(path, errno);
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return false;
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}
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// Mono ignores all other attributes
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if (attributes & kFileAttributeInternalMonoExecutable)
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{
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mode_t exec_mask = 0;
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if ((pathStat.st_mode & S_IRUSR) != 0)
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exec_mask |= S_IXUSR;
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if ((pathStat.st_mode & S_IRGRP) != 0)
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exec_mask |= S_IXGRP;
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if ((pathStat.st_mode & S_IROTH) != 0)
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exec_mask |= S_IXOTH;
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ret = chmod(path.c_str(), pathStat.st_mode | exec_mask);
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if (ret != 0)
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{
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*error = PathErrnoToErrorCode(path, errno);
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return false;
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}
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}
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return true;
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}
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bool File::GetFileStat(const std::string& path, il2cpp::os::FileStat * stat, int* error)
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{
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struct stat pathStat, linkStat;
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*error = GetStatAndLinkStat(path, pathStat, linkStat);
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if (*error != kErrorCodeSuccess)
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return false;
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const std::string filename(il2cpp::utils::PathUtils::Basename(path));
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const time_t creationTime = pathStat.st_mtime < pathStat.st_ctime ? pathStat.st_mtime : pathStat.st_ctime;
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stat->name = filename;
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stat->attributes = StatToFileAttribute(path, pathStat, &linkStat);
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stat->length = (stat->attributes & kFileAttributeDirectory) > 0 ? 0 : pathStat.st_size;
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stat->creation_time = TimeToTicks(creationTime);
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stat->last_access_time = TimeToTicks(pathStat.st_atime);
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stat->last_write_time = TimeToTicks(pathStat.st_mtime);
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return true;
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}
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FileType File::GetFileType(FileHandle* handle)
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{
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return ((FileHandle*)handle)->type;
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}
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bool File::DeleteFile(const std::string& path, int *error)
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{
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const UnityPalFileAttributes attributes = GetFileAttributes(path, error);
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if (*error != kErrorCodeSuccess)
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{
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return false;
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}
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if (attributes & kFileAttributeReadOnly)
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{
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*error = kErrorCodeAccessDenied;
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return false;
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}
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const int ret = unlink(path.c_str());
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if (ret == -1)
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{
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*error = PathErrnoToErrorCode(path, errno);
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return false;
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}
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*error = kErrorCodeSuccess;
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return true;
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}
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bool File::CopyFile(const std::string& src, const std::string& dest, bool overwrite, int* error)
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{
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const int srcFd = open(src.c_str(), O_RDONLY, 0);
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if (srcFd < 0)
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{
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*error = PathErrnoToErrorCode(src, errno);
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return false;
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}
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struct stat srcStat;
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if (fstat(srcFd, &srcStat) < 0)
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{
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*error = FileErrnoToErrorCode(errno);
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close(srcFd);
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return false;
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}
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int destFd;
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if (!overwrite)
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{
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destFd = open(dest.c_str(), O_WRONLY | O_CREAT | O_EXCL, srcStat.st_mode);
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}
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else
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{
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destFd = open(dest.c_str(), O_WRONLY | O_TRUNC, srcStat.st_mode);
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if (destFd < 0)
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destFd = open(dest.c_str(), O_WRONLY | O_CREAT | O_TRUNC, srcStat.st_mode);
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else
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*error = kErrorCodeAlreadyExists; // Apparently this error is set if we overwrite the dest file
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}
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if (destFd < 0)
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{
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*error = FileErrnoToErrorCode(errno);
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close(srcFd);
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return false;
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}
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const bool ret = InternalCopyFile(srcFd, destFd, srcStat, error);
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close(srcFd);
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close(destFd);
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return ret;
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}
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bool File::MoveFile(const std::string& src, const std::string& dest, int* error)
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{
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struct stat srcStat, destStat;
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if (stat(src.c_str(), &srcStat) < 0)
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{
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*error = PathErrnoToErrorCode(src.c_str(), errno);
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return false;
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}
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// In C# land we check for the existence of src, but not for dest.
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// We check it here and return the failure if dest exists and is not
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// the same file as src.
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if (stat(dest.c_str(), &destStat) == 0) // dest exists
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{
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if (destStat.st_dev != srcStat.st_dev || destStat.st_ino != srcStat.st_ino)
|
{
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*error = kErrorCodeAlreadyExists;
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return false;
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}
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}
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if (!ShareAllowOpen(srcStat, kFileShareNone, kFileAccessWrite))
|
{
|
*error = kErrorCodeSuccess;
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return false;
|
}
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const int ret = rename(src.c_str(), dest.c_str());
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|
if (ret == -1)
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{
|
if (errno == EEXIST)
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{
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*error = kErrorCodeAlreadyExists;
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return false;
|
}
|
else if (errno == EXDEV)
|
{
|
if (S_ISDIR(srcStat.st_mode))
|
{
|
*error = kErrorCodeNotSameDevice;
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return false;
|
}
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if (!CopyFile(src, dest, true, error))
|
{
|
// CopyFile sets the error
|
return false;
|
}
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|
return DeleteFile(src, error); // DeleteFile sets the error
|
}
|
else
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{
|
*error = PathErrnoToErrorCode(src.c_str(), errno);
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return false;
|
}
|
}
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|
*error = kErrorCodeSuccess;
|
return true;
|
}
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|
bool File::ReplaceFile(const std::string& sourceFileName, const std::string& destinationFileName, const std::string& destinationBackupFileName, bool ignoreMetadataErrors, int* error)
|
{
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const bool backupFile = !destinationBackupFileName.empty();
|
|
// Open the backup file for read so we can restore the file if an error occurs.
|
const int backupFd = backupFile ? open(destinationBackupFileName.c_str(), O_RDONLY, 0) : -1;
|
|
// dest -> backup
|
if (backupFile)
|
{
|
const int retDest = rename(destinationFileName.c_str(), destinationBackupFileName.c_str());
|
|
if (retDest == -1)
|
{
|
if (backupFd != -1)
|
close(backupFd);
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|
*error = PathErrnoToErrorCode(destinationFileName.c_str(), errno);
|
return false;
|
}
|
}
|
|
// source -> dest
|
const int restSource = rename(sourceFileName.c_str(), destinationFileName.c_str());
|
|
if (restSource == -1)
|
{
|
// backup -> dest
|
if (backupFile)
|
rename(destinationBackupFileName.c_str(), destinationFileName.c_str());
|
|
// Copy backup data -> dest
|
struct stat backupStat;
|
if (backupFd != -1 && fstat(backupFd, &backupStat) == 0)
|
{
|
const int destFd = open(destinationBackupFileName.c_str(), O_WRONLY | O_CREAT | O_TRUNC, backupStat.st_mode);
|
|
if (destFd != -1)
|
{
|
int unusedCopyFileError;
|
InternalCopyFile(backupFd, destFd, backupStat, &unusedCopyFileError);
|
close(destFd);
|
}
|
}
|
|
if (backupFd != -1)
|
close(backupFd);
|
|
*error = PathErrnoToErrorCode(sourceFileName.c_str(), errno);
|
return false;
|
}
|
|
if (backupFd != -1)
|
close(backupFd);
|
|
*error = kErrorCodeSuccess;
|
|
return true;
|
}
|
|
static int ConvertFlags(int fileaccess, int createmode)
|
{
|
int flags;
|
|
switch (fileaccess)
|
{
|
case kFileAccessRead:
|
flags = O_RDONLY;
|
break;
|
case kFileAccessWrite:
|
flags = O_WRONLY;
|
break;
|
case kFileAccessReadWrite:
|
flags = O_RDWR;
|
break;
|
default:
|
flags = 0;
|
break;
|
}
|
|
switch (createmode)
|
{
|
case kFileModeCreateNew:
|
flags |= O_CREAT | O_EXCL;
|
break;
|
case kFileModeCreate:
|
flags |= O_CREAT | O_TRUNC;
|
break;
|
case kFileModeOpen:
|
break;
|
case kFileModeOpenOrCreate:
|
case kFileModeAppend:
|
flags |= O_CREAT;
|
break;
|
case kFileModeTruncate:
|
flags |= O_TRUNC;
|
break;
|
default:
|
flags = 0;
|
break;
|
}
|
|
return flags;
|
}
|
|
#ifndef S_ISFIFO
|
#define S_ISFIFO(m) ((m & S_IFIFO) != 0)
|
#endif
|
|
FileHandle* File::Open(const std::string& path, int mode, int accessMode, int shareMode, int options, int *error)
|
{
|
const int flags = ConvertFlags(accessMode, mode);
|
|
/* we don't use sharemode, because that relates to sharing of
|
* the file when the file is open and is already handled by
|
* other code, perms instead are the on-disk permissions and
|
* this is a sane default.
|
*/
|
const mode_t perms = options & kFileOptionsTemporary ? 0600 : 0666;
|
|
int fd = open(path.c_str(), flags, perms);
|
|
/* If we were trying to open a directory with write permissions
|
* (e.g. O_WRONLY or O_RDWR), this call will fail with
|
* EISDIR. However, this is a bit bogus because calls to
|
* manipulate the directory (e.g. SetFileTime) will still work on
|
* the directory because they use other API calls
|
* (e.g. utime()). Hence, if we failed with the EISDIR error, try
|
* to open the directory again without write permission.
|
*/
|
|
// Try again but don't try to make it writable
|
if (fd == -1)
|
{
|
if (errno == EISDIR)
|
{
|
fd = open(path.c_str(), flags & ~(O_RDWR | O_WRONLY), perms);
|
|
if (fd == -1)
|
{
|
*error = PathErrnoToErrorCode(path, errno);
|
return INVALID_FILE_HANDLE;
|
}
|
}
|
else
|
{
|
*error = PathErrnoToErrorCode(path, errno);
|
return INVALID_FILE_HANDLE;
|
}
|
}
|
|
struct stat statbuf;
|
const int ret = fstat(fd, &statbuf);
|
|
if (ret == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
close(fd);
|
return INVALID_FILE_HANDLE;
|
}
|
|
if (!ShareAllowOpen(statbuf, shareMode, accessMode))
|
{
|
*error = kErrorCodeSharingViolation;
|
close(fd);
|
return INVALID_FILE_HANDLE;
|
}
|
|
FileHandle* fileHandle = new FileHandle();
|
fileHandle->fd = fd;
|
fileHandle->path = path;
|
fileHandle->options = options;
|
fileHandle->accessMode = accessMode;
|
fileHandle->shareMode = shareMode;
|
|
fileHandle->device = statbuf.st_dev;
|
fileHandle->inode = statbuf.st_ino;
|
|
// Add to linked list
|
AddFileHandle(fileHandle);
|
|
#ifdef HAVE_POSIX_FADVISE
|
if (options & kFileOptionsSequentialScan)
|
posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL);
|
if (options & kFileOptionsRandomAccess)
|
posix_fadvise(fd, 0, 0, POSIX_FADV_RANDOM);
|
#endif
|
|
if (S_ISFIFO(statbuf.st_mode))
|
fileHandle->type = kFileTypePipe;
|
else if (S_ISCHR(statbuf.st_mode))
|
fileHandle->type = kFileTypeChar;
|
else
|
fileHandle->type = kFileTypeDisk;
|
|
*error = kErrorCodeSuccess;
|
|
return fileHandle;
|
}
|
|
bool File::Close(FileHandle* handle, int *error)
|
{
|
if (handle->type == kFileTypeDisk && handle->options & kFileOptionsDeleteOnClose)
|
unlink(handle->path.c_str());
|
|
close(handle->fd);
|
|
// Remove from linked list
|
RemoveFileHandle(handle);
|
|
delete handle;
|
|
*error = kErrorCodeSuccess;
|
|
return true;
|
}
|
|
bool File::SetFileTime(FileHandle* handle, int64_t creation_time, int64_t last_access_time, int64_t last_write_time, int* error)
|
{
|
if ((handle->accessMode & kFileAccessWrite) == 0)
|
{
|
*error = kErrorCodeAccessDenied;
|
return false;
|
}
|
|
struct stat statbuf;
|
const int ret = fstat(handle->fd, &statbuf);
|
|
if (ret == -1)
|
{
|
*error = kErrorCodeInvalidParameter;
|
return false;
|
}
|
|
struct utimbuf utbuf;
|
|
// Setting creation time is not implemented in Mono and not supported by utime.
|
|
if (last_access_time >= 0)
|
{
|
if (last_access_time < TIME_ZERO)
|
{
|
*error = kErrorCodeInvalidParameter;
|
return false;
|
}
|
|
utbuf.actime = TicksToTime(last_access_time);
|
}
|
else
|
{
|
utbuf.actime = statbuf.st_atime;
|
}
|
|
if (last_write_time >= 0)
|
{
|
if (last_write_time < TIME_ZERO)
|
{
|
*error = kErrorCodeInvalidParameter;
|
return false;
|
}
|
|
utbuf.modtime = TicksToTime(last_write_time);
|
}
|
else
|
{
|
utbuf.modtime = statbuf.st_mtime;
|
}
|
|
const int utimeRet = utime(handle->path.c_str(), &utbuf);
|
|
if (utimeRet == -1)
|
{
|
*error = kErrorCodeInvalidParameter;
|
return false;
|
}
|
|
*error = kErrorCodeSuccess;
|
|
return true;
|
}
|
|
int64_t File::GetLength(FileHandle* handle, int *error)
|
{
|
if (handle->type != kFileTypeDisk)
|
{
|
*error = kErrorCodeInvalidHandle;
|
return false;
|
}
|
|
struct stat statbuf;
|
|
const int ret = fstat(handle->fd, &statbuf);
|
|
if (ret == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return -1;
|
}
|
|
*error = kErrorCodeSuccess;
|
|
return statbuf.st_size;
|
}
|
|
bool File::SetLength(FileHandle* handle, int64_t length, int *error)
|
{
|
if (handle->type != kFileTypeDisk)
|
{
|
*error = kErrorCodeInvalidHandle;
|
return false;
|
}
|
|
// Save current position
|
const off_t currentPosition = lseek(handle->fd, 0, SEEK_CUR);
|
|
if (currentPosition == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return false;
|
}
|
|
const off_t setLength = lseek(handle->fd, length, SEEK_SET);
|
|
if (setLength == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return false;
|
}
|
|
int ret = 0;
|
|
do
|
{
|
ret = ftruncate(handle->fd, length);
|
}
|
while (ret == -1 && errno == EINTR);
|
|
if (ret == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return false;
|
}
|
|
const off_t oldPosition = lseek(handle->fd, currentPosition, SEEK_SET);
|
|
if (oldPosition == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return false;
|
}
|
|
*error = kErrorCodeSuccess;
|
|
return true;
|
}
|
|
#if !IL2CPP_USE_GENERIC_FILE
|
bool File::Truncate(FileHandle* handle, int *error)
|
{
|
off_t currentPosition = lseek(handle->fd, (off_t)0, SEEK_CUR);
|
int32_t ret = 0;
|
*error = kErrorCodeSuccess;
|
|
if (currentPosition == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return false;
|
}
|
|
do
|
{
|
ret = ftruncate(handle->fd, currentPosition);
|
}
|
while (ret == -1 && errno == EINTR);
|
|
if (ret == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return false;
|
}
|
|
return true;
|
}
|
|
#endif // IL2CPP_USE_GENERIC_FILE
|
|
int64_t File::Seek(FileHandle* handle, int64_t offset, int origin, int *error)
|
{
|
if (handle->type != kFileTypeDisk)
|
{
|
*error = kErrorCodeInvalidHandle;
|
return false;
|
}
|
|
int whence;
|
|
switch (origin)
|
{
|
case kFileSeekOriginBegin:
|
whence = SEEK_SET;
|
break;
|
case kFileSeekOriginCurrent:
|
whence = SEEK_CUR;
|
break;
|
case kFileSeekOriginEnd:
|
whence = SEEK_END;
|
break;
|
default:
|
{
|
*error = kErrorCodeInvalidParameter;
|
return -1;
|
}
|
}
|
|
const off_t position = lseek(handle->fd, offset, whence);
|
|
if (position == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return -1;
|
}
|
|
*error = kErrorCodeSuccess;
|
|
return position;
|
}
|
|
int File::Read(FileHandle* handle, char *dest, int count, int *error)
|
{
|
if (handle == NULL || handle == INVALID_FILE_HANDLE)
|
{
|
*error = kErrorCodeInvalidHandle;
|
return 0;
|
}
|
|
if ((handle->accessMode & kFileAccessRead) == 0)
|
{
|
*error = kErrorCodeAccessDenied;
|
return 0;
|
}
|
|
int ret;
|
|
do
|
{
|
ret = (int)read(handle->fd, dest, count);
|
}
|
while (ret == -1 && errno == EINTR);
|
|
if (ret == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return 0;
|
}
|
|
#if IL2CPP_ENABLE_PROFILER
|
IL2CPP_VM_PROFILE_FILEIO(IL2CPP_PROFILE_FILEIO_READ, count);
|
#endif
|
return ret;
|
}
|
|
int32_t File::Write(FileHandle* handle, const char* buffer, int count, int *error)
|
{
|
if ((handle->accessMode & kFileAccessWrite) == 0)
|
{
|
*error = kErrorCodeAccessDenied;
|
return -1;
|
}
|
|
int ret;
|
|
do
|
{
|
ret = (int32_t)write(handle->fd, buffer, count);
|
}
|
while (ret == -1 && errno == EINTR);
|
|
if (ret == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return -1;
|
}
|
|
#if IL2CPP_ENABLE_PROFILER
|
IL2CPP_VM_PROFILE_FILEIO(IL2CPP_PROFILE_FILEIO_WRITE, count);
|
#endif
|
return ret;
|
}
|
|
bool File::Flush(FileHandle* handle, int* error)
|
{
|
if (handle->type != kFileTypeDisk)
|
{
|
*error = kErrorCodeInvalidHandle;
|
return false;
|
}
|
|
const int ret = fsync(handle->fd);
|
|
if (ret == -1)
|
{
|
*error = FileErrnoToErrorCode(errno);
|
return false;
|
}
|
|
*error = kErrorCodeSuccess;
|
return true;
|
}
|
|
void File::Lock(FileHandle* handle, int64_t position, int64_t length, int* error)
|
{
|
struct flock lock_data;
|
int ret;
|
|
lock_data.l_type = F_WRLCK;
|
lock_data.l_whence = SEEK_SET;
|
lock_data.l_start = position;
|
lock_data.l_len = length;
|
|
do
|
{
|
ret = fcntl(handle->fd, F_SETLK, &lock_data);
|
}
|
while (ret == -1 && errno == EINTR);
|
|
if (ret == -1)
|
{
|
/*
|
* if locks are not available (NFS for example),
|
* ignore the error
|
*/
|
if (errno == ENOLCK
|
#ifdef EOPNOTSUPP
|
|| errno == EOPNOTSUPP
|
#endif
|
#ifdef ENOTSUP
|
|| errno == ENOTSUP
|
#endif
|
)
|
{
|
*error = kErrorCodeSuccess;
|
return;
|
}
|
|
*error = FileErrnoToErrorCode(errno);
|
return;
|
}
|
|
*error = kErrorCodeSuccess;
|
}
|
|
void File::Unlock(FileHandle* handle, int64_t position, int64_t length, int* error)
|
{
|
struct flock lock_data;
|
int ret;
|
|
lock_data.l_type = F_UNLCK;
|
lock_data.l_whence = SEEK_SET;
|
lock_data.l_start = position;
|
lock_data.l_len = length;
|
|
do
|
{
|
ret = fcntl(handle->fd, F_SETLK, &lock_data);
|
}
|
while (ret == -1 && errno == EINTR);
|
|
if (ret == -1)
|
{
|
/*
|
* if locks are not available (NFS for example),
|
* ignore the error
|
*/
|
if (errno == ENOLCK
|
#ifdef EOPNOTSUPP
|
|| errno == EOPNOTSUPP
|
#endif
|
#ifdef ENOTSUP
|
|| errno == ENOTSUP
|
#endif
|
)
|
{
|
*error = kErrorCodeSuccess;
|
return;
|
}
|
|
*error = FileErrnoToErrorCode(errno);
|
return;
|
}
|
|
*error = kErrorCodeSuccess;
|
}
|
|
bool File::DuplicateHandle(FileHandle* source_process_handle, FileHandle* source_handle, FileHandle* target_process_handle,
|
FileHandle** target_handle, int access, int inhert, int options, int* error)
|
{
|
IL2CPP_NOT_IMPLEMENTED_ICALL(File::DuplicateHandle);
|
return false;
|
}
|
|
bool File::IsExecutable(const std::string& path)
|
{
|
#if IL2CPP_CAN_CHECK_EXECUTABLE
|
return access(path.c_str(), X_OK) == 0;
|
#else
|
IL2CPP_VM_NOT_SUPPORTED(File::IsExecutable, "This platform cannot check for executable permissions.");
|
return false;
|
#endif
|
}
|
}
|
}
|
|
#endif
|
