/* * %CopyrightBegin% * * Copyright Ericsson AB 1997-2010. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in * compliance with the License. You should have received a copy of the * Erlang Public License along with this software. If not, it can be * retrieved online at http://www.erlang.org/. * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See * the License for the specific language governing rights and limitations * under the License. * * %CopyrightEnd% */ /* * Purpose: Provides file and directory operations for Windows. */ #include #include "sys.h" #include #include "erl_efile.h" /* * Microsoft-specific function to map a WIN32 error code to a Posix errno. */ #define ISSLASH(a) ((a) == '\\' || (a) == '/') #define ISDIR(st) (((st).st_mode&S_IFMT) == S_IFDIR) #define ISREG(st) (((st).st_mode&S_IFMT) == S_IFREG) #define IS_DOT_OR_DOTDOT(s) \ (s[0] == '.' && (s[1] == '\0' || (s[1] == '.' && s[2] == '\0'))) #ifndef INVALID_FILE_ATTRIBUTES #define INVALID_FILE_ATTRIBUTES ((DWORD) 0xFFFFFFFF) #endif static int check_error(int result, Efile_error* errInfo); static int set_error(Efile_error* errInfo); static int IsRootUNCName(const char* path); static int extract_root(char* name); static unsigned short dos_to_posix_mode(int attr, const char *name); static int errno_map(DWORD last_error) { switch (last_error) { case ERROR_SUCCESS: return 0; case ERROR_INVALID_FUNCTION: case ERROR_INVALID_DATA: case ERROR_INVALID_PARAMETER: case ERROR_INVALID_TARGET_HANDLE: case ERROR_INVALID_CATEGORY: case ERROR_NEGATIVE_SEEK: return EINVAL; case ERROR_DIR_NOT_EMPTY: return EEXIST; case ERROR_BAD_FORMAT: return ENOEXEC; case ERROR_PATH_NOT_FOUND: case ERROR_FILE_NOT_FOUND: case ERROR_NO_MORE_FILES: return ENOENT; case ERROR_TOO_MANY_OPEN_FILES: return EMFILE; case ERROR_ACCESS_DENIED: case ERROR_INVALID_ACCESS: case ERROR_CURRENT_DIRECTORY: case ERROR_SHARING_VIOLATION: case ERROR_LOCK_VIOLATION: case ERROR_INVALID_PASSWORD: case ERROR_DRIVE_LOCKED: return EACCES; case ERROR_INVALID_HANDLE: return EBADF; case ERROR_NOT_ENOUGH_MEMORY: case ERROR_OUTOFMEMORY: case ERROR_OUT_OF_STRUCTURES: return ENOMEM; case ERROR_INVALID_DRIVE: case ERROR_BAD_UNIT: case ERROR_NOT_READY: case ERROR_REM_NOT_LIST: case ERROR_DUP_NAME: case ERROR_BAD_NETPATH: case ERROR_NETWORK_BUSY: case ERROR_DEV_NOT_EXIST: case ERROR_BAD_NET_NAME: return ENXIO; case ERROR_NOT_SAME_DEVICE: return EXDEV; case ERROR_WRITE_PROTECT: return EROFS; case ERROR_BAD_LENGTH: case ERROR_BUFFER_OVERFLOW: return E2BIG; case ERROR_SEEK: case ERROR_SECTOR_NOT_FOUND: return ESPIPE; case ERROR_NOT_DOS_DISK: return ENODEV; case ERROR_GEN_FAILURE: return ENODEV; case ERROR_SHARING_BUFFER_EXCEEDED: case ERROR_NO_MORE_SEARCH_HANDLES: return EMFILE; case ERROR_HANDLE_EOF: case ERROR_BROKEN_PIPE: return EPIPE; case ERROR_HANDLE_DISK_FULL: case ERROR_DISK_FULL: return ENOSPC; case ERROR_NOT_SUPPORTED: return ENOTSUP; case ERROR_FILE_EXISTS: case ERROR_ALREADY_EXISTS: case ERROR_CANNOT_MAKE: return EEXIST; case ERROR_ALREADY_ASSIGNED: return EBUSY; case ERROR_NO_PROC_SLOTS: return EAGAIN; case ERROR_ARENA_TRASHED: case ERROR_INVALID_BLOCK: case ERROR_BAD_ENVIRONMENT: case ERROR_BAD_COMMAND: case ERROR_CRC: case ERROR_OUT_OF_PAPER: case ERROR_READ_FAULT: case ERROR_WRITE_FAULT: case ERROR_WRONG_DISK: case ERROR_NET_WRITE_FAULT: return EIO; default: /* not to do with files I expect. */ return EIO; } } static int check_error(int result, Efile_error* errInfo) { if (result < 0) { errInfo->posix_errno = errno; errInfo->os_errno = GetLastError(); return 0; } return 1; } /* * Fills the provided error information structure with information * with the error code given by GetLastError() and its corresponding * Posix error number. * * Returns 0. */ static int set_error(Efile_error* errInfo) { errInfo->posix_errno = errno_map(errInfo->os_errno = GetLastError()); return 0; } /* * A writev with Unix semantics, but with Windows arguments */ static int win_writev(Efile_error* errInfo, HANDLE fd, /* handle to file */ FILE_SEGMENT_ELEMENT iov[], /* array of buffer pointers */ DWORD *size) /* number of bytes to write */ { OVERLAPPED ov; ov.Offset = 0L; ov.OffsetHigh = 0L; ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (ov.hEvent == NULL) return set_error(errInfo); if (! write_file_gather(fd, iov, *size, NULL, &ov)) return set_error(errInfo); if (WaitForSingleObject(ov.hEvent, INFINITE) != WAIT_OBJECT_0) return set_error(errInfo); if (! GetOverlappedResult(fd, &ov, size, FALSE)) return set_error(errInfo); return 1; } int efile_mkdir(errInfo, name) Efile_error* errInfo; /* Where to return error codes. */ char* name; /* Name of directory to create. */ { return check_error(mkdir(name), errInfo); } int efile_rmdir(errInfo, name) Efile_error* errInfo; /* Where to return error codes. */ char* name; /* Name of directory to delete. */ { OSVERSIONINFO os; DWORD attr; if (RemoveDirectory(name) != FALSE) { return 1; } errno = errno_map(GetLastError()); if (errno == EACCES) { attr = GetFileAttributes(name); if (attr != (DWORD) -1) { if ((attr & FILE_ATTRIBUTE_DIRECTORY) == 0) { /* * Windows 95 reports calling RemoveDirectory on a file as an * EACCES, not an ENOTDIR. */ errno = ENOTDIR; goto end; } /* * Windows 95 reports removing a non-empty directory as * an EACCES, not an EEXIST. If the directory is not empty, * change errno so caller knows what's going on. */ os.dwOSVersionInfoSize = sizeof(os); GetVersionEx(&os); if (os.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) { HANDLE handle; WIN32_FIND_DATA data; char buffer[2*MAX_PATH]; int len; len = strlen(name); strcpy(buffer, name); if (buffer[0] && buffer[len-1] != '\\' && buffer[len-1] != '/') { strcat(buffer, "\\"); } strcat(buffer, "*.*"); handle = FindFirstFile(buffer, &data); if (handle != INVALID_HANDLE_VALUE) { while (1) { if ((strcmp(data.cFileName, ".") != 0) && (strcmp(data.cFileName, "..") != 0)) { /* * Found something in this directory. */ errno = EEXIST; break; } if (FindNextFile(handle, &data) == FALSE) { break; } } FindClose(handle); } } } } if (errno == ENOTEMPTY) { /* * Posix allows both EEXIST or ENOTEMPTY, but we'll always * return EEXIST to allow easy matching in Erlang code. */ errno = EEXIST; } end: return check_error(-1, errInfo); } int efile_delete_file(errInfo, name) Efile_error* errInfo; /* Where to return error codes. */ char* name; /* Name of file to delete. */ { DWORD attr; if (DeleteFile(name) != FALSE) { return 1; } errno = errno_map(GetLastError()); if (errno == EACCES) { attr = GetFileAttributes(name); if (attr != (DWORD) -1) { if (attr & FILE_ATTRIBUTE_DIRECTORY) { /* * Windows NT reports removing a directory as EACCES instead * of EPERM. */ errno = EPERM; } } } else if (errno == ENOENT) { attr = GetFileAttributes(name); if (attr != (DWORD) -1) { if (attr & FILE_ATTRIBUTE_DIRECTORY) { /* * Windows 95 reports removing a directory as ENOENT instead * of EPERM. */ errno = EPERM; } } } else if (errno == EINVAL) { /* * Windows NT reports removing a char device as EINVAL instead of * EACCES. */ errno = EACCES; } return check_error(-1, errInfo); } /* *--------------------------------------------------------------------------- * * Changes the name of an existing file or directory, from src to dst. * If src and dst refer to the same file or directory, does nothing * and returns success. Otherwise if dst already exists, it will be * deleted and replaced by src subject to the following conditions: * If src is a directory, dst may be an empty directory. * If src is a file, dst may be a file. * In any other situation where dst already exists, the rename will * fail. * * Some possible error codes: * * EACCES: src or dst parent directory can't be read and/or written. * EEXIST: dst is a non-empty directory. * EINVAL: src is a root directory or dst is a subdirectory of src. * EISDIR: dst is a directory, but src is not. * ENOENT: src doesn't exist, or src or dst is "". * ENOTDIR: src is a directory, but dst is not. * EXDEV: src and dst are on different filesystems. * * Side effects: * The implementation of rename may allow cross-filesystem renames, * but the caller should be prepared to emulate it with copy and * delete if errno is EXDEV. * *--------------------------------------------------------------------------- */ int efile_rename(errInfo, src, dst) Efile_error* errInfo; /* Where to return error codes. */ char* src; /* Original name. */ char* dst; /* New name. */ { DWORD srcAttr, dstAttr; if (MoveFile(src, dst) != FALSE) { return 1; } errno = errno_map(GetLastError()); srcAttr = GetFileAttributes(src); dstAttr = GetFileAttributes(dst); if (srcAttr == (DWORD) -1) { srcAttr = 0; } if (dstAttr == (DWORD) -1) { dstAttr = 0; } if (errno == EBADF) { errno = EACCES; return check_error(-1, errInfo); } if (errno == EACCES) { decode: if (srcAttr & FILE_ATTRIBUTE_DIRECTORY) { char srcPath[MAX_PATH], dstPath[MAX_PATH]; char *srcRest, *dstRest; int size; size = GetFullPathName(src, sizeof(srcPath), srcPath, &srcRest); if ((size == 0) || (size > sizeof(srcPath))) { return check_error(-1, errInfo); } size = GetFullPathName(dst, sizeof(dstPath), dstPath, &dstRest); if ((size == 0) || (size > sizeof(dstPath))) { return check_error(-1, errInfo); } if (srcRest == NULL) { srcRest = srcPath + strlen(srcPath); } if (strnicmp(srcPath, dstPath, srcRest - srcPath) == 0) { /* * Trying to move a directory into itself. */ errno = EINVAL; } if (extract_root(srcPath)) { /* * Attempt to move a root directory. Never allowed. */ errno = EINVAL; } (void) extract_root(dstPath); if (dstPath[0] == '\0') { /* * The filename was invalid. (Don't know why, * but play it safe.) */ errno = EINVAL; } if (stricmp(srcPath, dstPath) != 0) { /* * If src is a directory and dst filesystem != src * filesystem, errno should be EXDEV. It is very * important to get this behavior, so that the caller * can respond to a cross filesystem rename by * simulating it with copy and delete. The MoveFile * system call already handles the case of moving a * *file* between filesystems. */ errno = EXDEV; } } /* * Other types of access failure is that dst is a read-only * filesystem, that an open file referred to src or dest, or that * src or dest specified the current working directory on the * current filesystem. EACCES is returned for those cases. */ } else if (errno == EEXIST) { /* * Reports EEXIST any time the target already exists. If it makes * sense, remove the old file and try renaming again. */ if (srcAttr & FILE_ATTRIBUTE_DIRECTORY) { if (dstAttr & FILE_ATTRIBUTE_DIRECTORY) { /* * Overwrite empty dst directory with src directory. The * following call will remove an empty directory. If it * fails, it's because it wasn't empty. */ if (RemoveDirectory(dst)) { /* * Now that that empty directory is gone, we can try * renaming again. If that fails, we'll put this empty * directory back, for completeness. */ if (MoveFile(src, dst) != FALSE) { return 1; } /* * Some new error has occurred. Don't know what it * could be, but report this one. */ errno = errno_map(GetLastError()); CreateDirectory(dst, NULL); SetFileAttributes(dst, dstAttr); if (errno == EACCES) { /* * Decode the EACCES to a more meaningful error. */ goto decode; } } } else { /* (dstAttr & FILE_ATTRIBUTE_DIRECTORY) == 0 */ errno = ENOTDIR; } } else { /* (srcAttr & FILE_ATTRIBUTE_DIRECTORY) == 0 */ if (dstAttr & FILE_ATTRIBUTE_DIRECTORY) { errno = EISDIR; } else { /* * Overwrite existing file by: * * 1. Rename existing file to temp name. * 2. Rename old file to new name. * 3. If success, delete temp file. If failure, * put temp file back to old name. */ char tempName[MAX_PATH]; int result, size; char *rest; size = GetFullPathName(dst, sizeof(tempName), tempName, &rest); if ((size == 0) || (size > sizeof(tempName)) || (rest == NULL)) { return check_error(-1, errInfo); } *rest = '\0'; result = -1; if (GetTempFileName(tempName, "erlr", 0, tempName) != 0) { /* * Strictly speaking, need the following DeleteFile and * MoveFile to be joined as an atomic operation so no * other app comes along in the meantime and creates the * same temp file. */ DeleteFile(tempName); if (MoveFile(dst, tempName) != FALSE) { if (MoveFile(src, dst) != FALSE) { SetFileAttributes(tempName, FILE_ATTRIBUTE_NORMAL); DeleteFile(tempName); return 1; } else { DeleteFile(dst); MoveFile(tempName, dst); } } /* * Can't backup dst file or move src file. Return that * error. Could happen if an open file refers to dst. */ errno = errno_map(GetLastError()); if (errno == EACCES) { /* * Decode the EACCES to a more meaningful error. */ goto decode; } } return result; } } } return check_error(-1, errInfo); } int efile_chdir(errInfo, name) Efile_error* errInfo; /* Where to return error codes. */ char* name; /* Name of directory to make current. */ { int success = check_error(chdir(name), errInfo); if (!success && errInfo->posix_errno == EINVAL) /* POSIXification of errno */ errInfo->posix_errno = ENOENT; return success; } int efile_getdcwd(errInfo, drive, buffer, size) Efile_error* errInfo; /* Where to return error codes. */ int drive; /* 0 - current, 1 - A, 2 - B etc. */ char* buffer; /* Where to return the current directory. */ size_t size; /* Size of buffer. */ { if (_getdcwd(drive, buffer, size) == NULL) return check_error(-1, errInfo); for ( ; *buffer; buffer++) if (*buffer == '\\') *buffer = '/'; return 1; } int efile_readdir(errInfo, name, dir_handle, buffer, size) Efile_error* errInfo; /* Where to return error codes. */ char* name; /* Name of directory to open. */ EFILE_DIR_HANDLE* dir_handle; /* Directory handle of open directory. */ char* buffer; /* Pointer to buffer for one filename. */ size_t size; /* Size of buffer. */ { HANDLE dir; /* Handle to directory. */ char wildcard[MAX_PATH]; /* Wildcard to search for. */ WIN32_FIND_DATA findData; /* Data found by FindFirstFile() or FindNext(). */ /* * First time we must setup everything. */ if (*dir_handle == NULL) { int length = strlen(name); char* s; if (length+3 >= MAX_PATH) { errno = ENAMETOOLONG; return check_error(-1, errInfo); } strcpy(wildcard, name); s = wildcard+length-1; if (*s != '/' && *s != '\\') *++s = '\\'; *++s = '*'; *++s = '\0'; DEBUGF(("Reading %s\n", wildcard)); dir = FindFirstFile(wildcard, &findData); if (dir == INVALID_HANDLE_VALUE) return set_error(errInfo); *dir_handle = (EFILE_DIR_HANDLE) dir; if (!IS_DOT_OR_DOTDOT(findData.cFileName)) { strcpy(buffer, findData.cFileName); return 1; } } /* * Retrieve the name of the next file using the directory handle. */ dir = (HANDLE) *dir_handle; for (;;) { if (FindNextFile(dir, &findData)) { if (IS_DOT_OR_DOTDOT(findData.cFileName)) continue; strcpy(buffer, findData.cFileName); return 1; } if (GetLastError() == ERROR_NO_MORE_FILES) { FindClose(dir); errInfo->posix_errno = errInfo->os_errno = 0; return 0; } set_error(errInfo); FindClose(dir); return 0; } } int efile_openfile(errInfo, name, flags, pfd, pSize) Efile_error* errInfo; /* Where to return error codes. */ char* name; /* Name of directory to open. */ int flags; /* Flags to use for opening. */ int* pfd; /* Where to store the file descriptor. */ Sint64* pSize; /* Where to store the size of the file. */ { BY_HANDLE_FILE_INFORMATION fileInfo; /* File information from a handle. */ HANDLE fd; /* Handle to open file. */ DWORD access; /* Access mode: GENERIC_READ, GENERIC_WRITE. */ DWORD crFlags; switch (flags & (EFILE_MODE_READ|EFILE_MODE_WRITE)) { case EFILE_MODE_READ: access = GENERIC_READ; crFlags = OPEN_EXISTING; break; case EFILE_MODE_WRITE: access = GENERIC_WRITE; crFlags = CREATE_ALWAYS; break; case EFILE_MODE_READ_WRITE: access = GENERIC_READ|GENERIC_WRITE; crFlags = OPEN_ALWAYS; break; default: errno = EINVAL; check_error(-1, errInfo); return 0; } if (flags & EFILE_MODE_APPEND) { crFlags = OPEN_ALWAYS; } if (flags & EFILE_MODE_EXCL) { crFlags = CREATE_NEW; } fd = CreateFile(name, access, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, crFlags, FILE_ATTRIBUTE_NORMAL, NULL); /* * Check for errors. */ if (fd == INVALID_HANDLE_VALUE) { DWORD attr; set_error(errInfo); /* * If the error is EACESS, the reason could be that we tried to * open a directory. In that case, we'll change the error code * to EISDIR. */ if (errInfo->posix_errno && (attr = GetFileAttributes(name)) != INVALID_FILE_ATTRIBUTES && (attr & FILE_ATTRIBUTE_DIRECTORY)) { errInfo->posix_errno = EISDIR; } return 0; } /* * Get and return the length of the open file. */ if (!GetFileInformationByHandle(fd, &fileInfo)) return set_error(errInfo); *pfd = (int) fd; if (pSize) { *pSize = (Sint64) (((Uint64)fileInfo.nFileSizeHigh << 32) | (Uint64)fileInfo.nFileSizeLow); } return 1; } int efile_may_openfile(Efile_error* errInfo, char *name) { DWORD attr; if ((attr = GetFileAttributes(name)) == INVALID_FILE_ATTRIBUTES) { return check_error(-1, errInfo); } if (attr & FILE_ATTRIBUTE_DIRECTORY) { errno = EISDIR; return check_error(-1, errInfo); } return 1; #if 0 struct stat statbuf; if (stat(name, &statbuf)) { return check_error(-1, errInfo); } if (ISDIR(statbuf)) { errno = EISDIR; return check_error(-1, errInfo); } return 1; #endif } void efile_closefile(fd) int fd; /* File descriptor for file to close. */ { CloseHandle((HANDLE) fd); } int efile_fdatasync(errInfo, fd) Efile_error* errInfo; /* Where to return error codes. */ int fd; /* File descriptor for file to sync. */ { /* Not available in Windows, just call regular fsync */ return efile_fsync(errInfo, fd); } int efile_fsync(errInfo, fd) Efile_error* errInfo; /* Where to return error codes. */ int fd; /* File descriptor for file to sync. */ { if (!FlushFileBuffers((HANDLE) fd)) { return check_error(-1, errInfo); } return 1; } int efile_fileinfo(Efile_error* errInfo, Efile_info* pInfo, char* orig_name, int info_for_link) { HANDLE findhandle; /* Handle returned by FindFirstFile(). */ WIN32_FIND_DATA findbuf; /* Data return by FindFirstFile(). */ char name[_MAX_PATH]; int name_len; char* path; char pathbuf[_MAX_PATH]; int drive; /* Drive for filename (1 = A:, 2 = B: etc). */ /* Don't allow wildcards to be interpreted by system */ if (strpbrk(orig_name, "?*")) { enoent: errInfo->posix_errno = ENOENT; errInfo->os_errno = ERROR_FILE_NOT_FOUND; return 0; } /* * Move the name to a buffer and make sure to remove a trailing * slash, because it causes FindFirstFile() to fail on Win95. */ if ((name_len = strlen(orig_name)) >= _MAX_PATH) { goto enoent; } else { strcpy(name, orig_name); if (name_len > 2 && ISSLASH(name[name_len-1]) && name[name_len-2] != ':') { name[name_len-1] = '\0'; } } /* Try to get disk from name. If none, get current disk. */ if (name[1] != ':') { drive = 0; if (GetCurrentDirectory(sizeof(pathbuf), pathbuf) && pathbuf[1] == ':') { drive = tolower(pathbuf[0]) - 'a' + 1; } } else if (*name && name[2] == '\0') { /* * X: and nothing more is an error. */ errInfo->posix_errno = ENOENT; errInfo->os_errno = ERROR_FILE_NOT_FOUND; return 0; } else drive = tolower(*name) - 'a' + 1; findhandle = FindFirstFile(name, &findbuf); if (findhandle == INVALID_HANDLE_VALUE) { if (!(strpbrk(name, "./\\") && (path = _fullpath(pathbuf, name, _MAX_PATH)) && /* root dir. ('C:\') or UNC root dir. ('\\server\share\') */ ((strlen(path) == 3) || IsRootUNCName(path)) && (GetDriveType(path) > 1) ) ) { errInfo->posix_errno = ENOENT; errInfo->os_errno = ERROR_FILE_NOT_FOUND; return 0; } /* * Root directories (such as C:\ or \\server\share\ are fabricated. */ findbuf.dwFileAttributes = FILE_ATTRIBUTE_DIRECTORY; findbuf.nFileSizeHigh = 0; findbuf.nFileSizeLow = 0; findbuf.cFileName[0] = '\0'; pInfo->modifyTime.year = 1980; pInfo->modifyTime.month = 1; pInfo->modifyTime.day = 1; pInfo->modifyTime.hour = 0; pInfo->modifyTime.minute = 0; pInfo->modifyTime.second = 0; pInfo->accessTime = pInfo->modifyTime; } else { SYSTEMTIME SystemTime; FILETIME LocalFTime; #define GET_TIME(dst, src) \ if (!FileTimeToLocalFileTime(&findbuf.src, &LocalFTime) || \ !FileTimeToSystemTime(&LocalFTime, &SystemTime)) { \ return set_error(errInfo); \ } \ (dst).year = SystemTime.wYear; \ (dst).month = SystemTime.wMonth; \ (dst).day = SystemTime.wDay; \ (dst).hour = SystemTime.wHour; \ (dst).minute = SystemTime.wMinute; \ (dst).second = SystemTime.wSecond; GET_TIME(pInfo->modifyTime, ftLastWriteTime); if (findbuf.ftLastAccessTime.dwLowDateTime == 0 && findbuf.ftLastAccessTime.dwHighDateTime == 0) { pInfo->accessTime = pInfo->modifyTime; } else { GET_TIME(pInfo->accessTime, ftLastAccessTime); } if (findbuf.ftCreationTime.dwLowDateTime == 0 && findbuf.ftCreationTime.dwHighDateTime == 0) { pInfo->cTime = pInfo->modifyTime; } else { GET_TIME(pInfo->cTime, ftCreationTime); } #undef GET_TIME FindClose(findhandle); } pInfo->size_low = findbuf.nFileSizeLow; pInfo->size_high = findbuf.nFileSizeHigh; if (findbuf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) pInfo->type = FT_DIRECTORY; else pInfo->type = FT_REGULAR; if (findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY) pInfo->access = FA_READ; else pInfo->access = FA_READ|FA_WRITE; pInfo->mode = dos_to_posix_mode(findbuf.dwFileAttributes, name); pInfo->links = 1; pInfo->major_device = drive; pInfo->minor_device = 0; pInfo->inode = 0; pInfo->uid = 0; pInfo->gid = 0; return 1; } int efile_write_info(errInfo, pInfo, name) Efile_error* errInfo; Efile_info* pInfo; char* name; { SYSTEMTIME timebuf; FILETIME LocalFileTime; FILETIME ModifyFileTime; FILETIME AccessFileTime; FILETIME CreationFileTime; HANDLE fd; FILETIME* mtime = NULL; FILETIME* atime = NULL; FILETIME* ctime = NULL; DWORD attr; DWORD tempAttr; BOOL modifyTime = FALSE; /* * Get the attributes for the file. */ tempAttr = attr = GetFileAttributes((LPTSTR)name); if (attr == 0xffffffff) { return set_error(errInfo); } if (pInfo->mode != -1) { if (pInfo->mode & _S_IWRITE) { /* clear read only bit */ attr &= ~FILE_ATTRIBUTE_READONLY; } else { /* set read only bit */ attr |= FILE_ATTRIBUTE_READONLY; } } /* * Construct all file times. */ #define MKTIME(tb, ts, ptr) \ timebuf.wYear = ts.year; \ timebuf.wMonth = ts.month; \ timebuf.wDay = ts.day; \ timebuf.wHour = ts.hour; \ timebuf.wMinute = ts.minute; \ timebuf.wSecond = ts.second; \ timebuf.wMilliseconds = 0; \ if (ts.year != -1) { \ modifyTime = TRUE; \ ptr = &tb; \ if (!SystemTimeToFileTime(&timebuf, &LocalFileTime ) || \ !LocalFileTimeToFileTime(&LocalFileTime, &tb)) { \ errno = EINVAL; \ return check_error(-1, errInfo); \ } \ } MKTIME(ModifyFileTime, pInfo->accessTime, mtime); MKTIME(AccessFileTime, pInfo->modifyTime, atime); MKTIME(CreationFileTime, pInfo->cTime, ctime); #undef MKTIME /* * If necessary, set the file times. */ if (modifyTime) { /* * If the has read only access, we must temporarily turn on * write access (this is necessary for native filesystems, * but not for NFS filesystems). */ if (tempAttr & FILE_ATTRIBUTE_READONLY) { tempAttr &= ~FILE_ATTRIBUTE_READONLY; if (!SetFileAttributes((LPTSTR) name, tempAttr)) { return set_error(errInfo); } } fd = CreateFile(name, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (fd != INVALID_HANDLE_VALUE) { BOOL result = SetFileTime(fd, ctime, atime, mtime); if (!result) { return set_error(errInfo); } CloseHandle(fd); } } /* * If the file doesn't have the correct attributes, set them now. * (It could have been done before setting the file times, above). */ if (tempAttr != attr) { if (!SetFileAttributes((LPTSTR) name, attr)) { return set_error(errInfo); } } return 1; } int efile_pwrite(errInfo, fd, buf, count, offset) Efile_error* errInfo; /* Where to return error codes. */ int fd; /* File descriptor to write to. */ char* buf; /* Buffer to write. */ size_t count; /* Number of bytes to write. */ Sint64 offset; /* where to write it */ { int res = efile_seek(errInfo, fd, offset, EFILE_SEEK_SET, NULL); if (res) { return efile_write(errInfo, EFILE_MODE_WRITE, fd, buf, count); } else { return res; } } /* position and read/write as a single atomic op */ int efile_pread(errInfo, fd, offset, buf, count, pBytesRead) Efile_error* errInfo; /* Where to return error codes. */ int fd; /* File descriptor to read from. */ Sint64 offset; /* Offset in bytes from BOF. */ char* buf; /* Buffer to read into. */ size_t count; /* Number of bytes to read. */ size_t* pBytesRead; /* Where to return number of bytes read. */ { int res = efile_seek(errInfo, fd, offset, EFILE_SEEK_SET, NULL); if (res) { return efile_read(errInfo, EFILE_MODE_READ, fd, buf, count, pBytesRead); } else { return res; } } int efile_write(errInfo, flags, fd, buf, count) Efile_error* errInfo; /* Where to return error codes. */ int flags; /* Flags given when file was opened. */ int fd; /* File descriptor to write to. */ char* buf; /* Buffer to write. */ size_t count; /* Number of bytes to write. */ { DWORD written; /* Bytes written in last operation. */ OVERLAPPED overlapped; OVERLAPPED* pOverlapped = NULL; if (flags & EFILE_MODE_APPEND) { memset(&overlapped, 0, sizeof(overlapped)); overlapped.Offset = 0xffffffff; overlapped.OffsetHigh = 0xffffffff; pOverlapped = &overlapped; } while (count > 0) { if (!WriteFile((HANDLE) fd, buf, count, &written, pOverlapped)) return set_error(errInfo); buf += written; count -= written; } return 1; } int efile_writev(Efile_error* errInfo, /* Where to return error codes */ int flags, /* Flags given when file was * opened */ int fd, /* File descriptor to write to */ SysIOVec* iov, /* Vector of buffer structs. * The structs are unchanged * after the call */ int iovcnt, /* Number of structs in vector */ size_t size) /* Number of bytes to write */ { int cnt; /* Buffers so far written */ OVERLAPPED overlapped; OVERLAPPED* pOverlapped = NULL; ASSERT(iovcnt >= 0); if (flags & EFILE_MODE_APPEND) { memset(&overlapped, 0, sizeof(overlapped)); overlapped.Offset = 0xffffffff; overlapped.OffsetHigh = 0xffffffff; pOverlapped = &overlapped; } for (cnt = 0; cnt < iovcnt; cnt++) { if (iov[cnt].iov_base && iov[cnt].iov_len > 0) { /* Non-empty buffer */ int p; /* Position in buffer */ int w = iov[cnt].iov_len;/* Bytes written in this call */ for (p = 0; p < iov[cnt].iov_len; p += w) { if (!WriteFile((HANDLE) fd, iov[cnt].iov_base + p, iov[cnt].iov_len - p, &w, pOverlapped)) return set_error(errInfo); } } } return 1; } int efile_read(errInfo, flags, fd, buf, count, pBytesRead) Efile_error* errInfo; /* Where to return error codes. */ int flags; /* Flags given when file was opened. */ int fd; /* File descriptor to read from. */ char* buf; /* Buffer to read into. */ size_t count; /* Number of bytes to read. */ size_t* pBytesRead; /* Where to return number of bytes read. */ { if (!ReadFile((HANDLE) fd, buf, count, (DWORD *) pBytesRead, NULL)) return set_error(errInfo); return 1; } int efile_seek(errInfo, fd, offset, origin, new_location) Efile_error* errInfo; /* Where to return error codes. */ int fd; /* File descriptor to do the seek on. */ Sint64 offset; /* Offset in bytes from the given origin. */ int origin; /* Origin of seek (SEEK_SET, SEEK_CUR, * SEEK_END). */ Sint64* new_location; /* Resulting new location in file. */ { LARGE_INTEGER off, new_loc; switch (origin) { case EFILE_SEEK_SET: origin = FILE_BEGIN; break; case EFILE_SEEK_CUR: origin = FILE_CURRENT; break; case EFILE_SEEK_END: origin = FILE_END; break; default: errno = EINVAL; check_error(-1, errInfo); break; } off.QuadPart = offset; if (! SetFilePointerEx((HANDLE) fd, off, new_location ? &new_loc : NULL, origin)) { return set_error(errInfo); } if (new_location) { *new_location = new_loc.QuadPart; DEBUGF(("efile_seek(offset=%ld, origin=%d) -> %ld\n", (long) offset, origin, (long) *new_location)); } else { DEBUGF(("efile_seek(offset=%ld, origin=%d)\n", (long) offset, origin)); } return 1; } int efile_truncate_file(errInfo, fd, flags) Efile_error* errInfo; /* Where to return error codes. */ int *fd; /* File descriptor for file to truncate. */ int flags; { if (!SetEndOfFile((HANDLE) (*fd))) return set_error(errInfo); return 1; } /* * IsRootUNCName - returns TRUE if the argument is a UNC name specifying * a root share. That is, if it is of the form \\server\share\. * This routine will also return true if the argument is of the * form \\server\share (no trailing slash) but Win32 currently * does not like that form. * * Forward slashes ('/') may be used instead of backslashes ('\'). */ static int IsRootUNCName(const char* path) { /* * If a root UNC name, path will start with 2 (but not 3) slashes */ if ((strlen(path) >= 5) /* minimum string is "//x/y" */ && ISSLASH(path[0]) && ISSLASH(path[1])) { const char * p = path + 2 ; /* * find the slash between the server name and share name */ while ( * ++ p ) if ( ISSLASH(*p) ) break ; if ( *p && p[1] ) { /* * is there a further slash? */ while ( * ++ p ) if ( ISSLASH(*p) ) break ; /* * just final slash (or no final slash) */ if ( !*p || !p[1]) return 1; } } return 0 ; } /* * Extracts the root part of an absolute filename (by modifying the string * pointed to by the name argument). The name can start * with either a driver letter (for example, C:\), or a UNC name * (for example, \\guinness\bjorn). * * If the name is invalid, the buffer will be modified to point to * an empty string. * * Returns: 1 if the name consists of just the root part, 0 if * the name was longer. */ static int extract_root(char* name) { int len = strlen(name); if (isalpha(name[0]) && name[1] == ':' && ISSLASH(name[2])) { int c = name[3]; name[3] = '\0'; return c == '\0'; } else if (len < 5 || !ISSLASH(name[0]) || !ISSLASH(name[1])) { goto error; } else { /* Try to find the end of the UNC name. */ char* p; int c; /* * Find the slash between the server name and share name. */ for (p = name + 2; *p; p++) if (ISSLASH(*p)) break; if (*p == '\0') goto error; /* * Find the slash after the share name. */ for (p++; *p; p++) if (ISSLASH(*p)) break; c = *p; *p = '\0'; return c == '\0' || p[1] == '\0'; } error: *name = '\0'; return 1; } static unsigned short dos_to_posix_mode(int attr, const char *name) { register unsigned short uxmode; unsigned dosmode; register const char *p; dosmode = attr & 0xff; if ((p = name)[1] == ':') p += 2; /* check to see if this is a directory - note we must make a special * check for the root, which DOS thinks is not a directory */ uxmode = (unsigned short) (((ISSLASH(*p) && !p[1]) || (dosmode & FILE_ATTRIBUTE_DIRECTORY) || *p == '\0') ? _S_IFDIR|_S_IEXEC : _S_IFREG); /* If attribute byte does not have read-only bit, it is read-write */ uxmode |= (dosmode & FILE_ATTRIBUTE_READONLY) ? _S_IREAD : (_S_IREAD|_S_IWRITE); /* see if file appears to be executable - check extension of name */ if (p = strrchr(name, '.')) { if (!stricmp(p, ".exe") || !stricmp(p, ".cmd") || !stricmp(p, ".bat") || !stricmp(p, ".com")) uxmode |= _S_IEXEC; } /* propagate user read/write/execute bits to group/other fields */ uxmode |= (uxmode & 0700) >> 3; uxmode |= (uxmode & 0700) >> 6; return uxmode; } int efile_readlink(Efile_error* errInfo, char* name, char* buffer, size_t size) { errno = ENOTSUP; return check_error(-1, errInfo); } int efile_altname(Efile_error* errInfo, char* orig_name, char* buffer, size_t size) { WIN32_FIND_DATA wfd; HANDLE fh; char name[_MAX_PATH]; int name_len; char* path; char pathbuf[_MAX_PATH]; int drive; /* Drive for filename (1 = A:, 2 = B: etc). */ /* Don't allow wildcards to be interpreted by system */ if (strpbrk(orig_name, "?*")) { enoent: errInfo->posix_errno = ENOENT; errInfo->os_errno = ERROR_FILE_NOT_FOUND; return 0; } /* * Move the name to a buffer and make sure to remove a trailing * slash, because it causes FindFirstFile() to fail on Win95. */ if ((name_len = strlen(orig_name)) >= _MAX_PATH) { goto enoent; } else { strcpy(name, orig_name); if (name_len > 2 && ISSLASH(name[name_len-1]) && name[name_len-2] != ':') { name[name_len-1] = '\0'; } } /* Try to get disk from name. If none, get current disk. */ if (name[1] != ':') { drive = 0; if (GetCurrentDirectory(sizeof(pathbuf), pathbuf) && pathbuf[1] == ':') { drive = tolower(pathbuf[0]) - 'a' + 1; } } else if (*name && name[2] == '\0') { /* * X: and nothing more is an error. */ goto enoent; } else { drive = tolower(*name) - 'a' + 1; } fh = FindFirstFile(name,&wfd); if (fh == INVALID_HANDLE_VALUE) { if (!(strpbrk(name, "./\\") && (path = _fullpath(pathbuf, name, _MAX_PATH)) && /* root dir. ('C:\') or UNC root dir. ('\\server\share\') */ ((strlen(path) == 3) || IsRootUNCName(path)) && (GetDriveType(path) > 1) ) ) { errno = errno_map(GetLastError()); return check_error(-1, errInfo); } /* * Root directories (such as C:\ or \\server\share\ are fabricated. */ strcpy(buffer,name); return 1; } strcpy(buffer,wfd.cAlternateFileName); if (!*buffer) { strcpy(buffer,wfd.cFileName); } return 1; } int efile_link(Efile_error* errInfo, char* old, char* new) { errno = ENOTSUP; return check_error(-1, errInfo); } int efile_symlink(Efile_error* errInfo, char* old, char* new) { errno = ENOTSUP; return check_error(-1, errInfo); } int efile_fadvise(Efile_error* errInfo, int fd, Sint64 offset, Sint64 length, int advise) { /* posix_fadvise is not available on Windows, do nothing */ errno = ERROR_SUCCESS; return check_error(0, errInfo); }