| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| |
| |
| ssize_t ngx_read_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) |
| { |
| long high_offset; |
| u_long n; |
| ngx_err_t err; |
| OVERLAPPED ovlp, *povlp; |
| |
| if (ngx_win32_version < NGX_WIN_NT) { |
| |
| /* |
| * in Win9X the overlapped pointer must be NULL |
| * so we need to use SetFilePointer() to set the offset |
| */ |
| |
| if (file->offset != offset) { |
| |
| /* |
| * the maximum file size on FAT16 is 2G, but on FAT32 |
| * the size is 4G so we need to use high_offset |
| * because a single offset is signed value |
| */ |
| |
| high_offset = (long) (offset >> 32); |
| if (SetFilePointer(file->fd, (long) offset, &high_offset, |
| FILE_BEGIN) == INVALID_SET_FILE_POINTER) |
| { |
| /* |
| * INVALID_SET_FILE_POINTER is 0xffffffff and it can be valid |
| * value for large file so we need also to check GetLastError() |
| */ |
| |
| err = ngx_errno; |
| if (err != NO_ERROR) { |
| ngx_log_error(NGX_LOG_ERR, file->log, err, |
| "SeekFilePointer() failed"); |
| return NGX_ERROR; |
| } |
| } |
| } |
| |
| povlp = NULL; |
| |
| } else { |
| ovlp.Internal = 0; |
| ovlp.InternalHigh = 0; |
| ovlp.Offset = (u_long) offset; |
| ovlp.OffsetHigh = (u_long) (offset >> 32); |
| ovlp.hEvent = NULL; |
| |
| povlp = &ovlp; |
| } |
| |
| if (ReadFile(file->fd, buf, size, &n, povlp) == 0) { |
| ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "ReadFile() failed"); |
| return NGX_ERROR; |
| } |
| |
| file->offset += n; |
| |
| return n; |
| } |
| |
| |
| ssize_t ngx_write_file(ngx_file_t *file, u_char *buf, size_t size, off_t offset) |
| { |
| long high_offset; |
| u_long n; |
| ngx_err_t err; |
| OVERLAPPED ovlp, *povlp; |
| |
| if (ngx_win32_version < NGX_WIN_NT) { |
| |
| /* |
| * in Win9X the overlapped pointer must be NULL |
| * so we need to use SetFilePointer() to set the offset |
| */ |
| |
| if (file->offset != offset) { |
| |
| /* |
| * the maximum file size on FAT16 is 2G, but on FAT32 |
| * the size is 4G so we need to use high_offset |
| * because a single offset is signed value |
| */ |
| |
| high_offset = (long) (offset >> 32); |
| if (SetFilePointer(file->fd, (long) offset, &high_offset, |
| FILE_BEGIN) == INVALID_SET_FILE_POINTER) |
| { |
| /* |
| * INVALID_SET_FILE_POINTER is 0xffffffff and it can be valid |
| * value for large file so we need also to check GetLastError() |
| */ |
| |
| err = ngx_errno; |
| if (err != NO_ERROR) { |
| ngx_log_error(NGX_LOG_ERR, file->log, err, |
| "SeekFilePointer() failed"); |
| return NGX_ERROR; |
| } |
| } |
| } |
| |
| povlp = NULL; |
| |
| } else { |
| ovlp.Internal = 0; |
| ovlp.InternalHigh = 0; |
| ovlp.Offset = (u_long) offset; |
| ovlp.OffsetHigh = (u_long) (offset >> 32); |
| ovlp.hEvent = NULL; |
| |
| povlp = &ovlp; |
| } |
| |
| if (WriteFile(file->fd, buf, size, &n, povlp) == 0) { |
| ngx_log_error(NGX_LOG_ERR, file->log, ngx_errno, "WriteFile() failed"); |
| return NGX_ERROR; |
| } |
| |
| file->offset += n; |
| |
| return n; |
| } |
| |
| |
| ssize_t ngx_write_chain_to_file(ngx_file_t *file, ngx_chain_t *cl, |
| off_t offset, ngx_pool_t *pool) |
| { |
| u_char *buf, *prev; |
| size_t size; |
| ssize_t total, n; |
| |
| total = 0; |
| |
| while (cl) { |
| buf = cl->buf->pos; |
| prev = buf; |
| size = 0; |
| |
| /* coalesce the neighbouring bufs */ |
| |
| while (cl && prev == cl->buf->pos) { |
| size += cl->buf->last - cl->buf->pos; |
| prev = cl->buf->last; |
| cl = cl->next; |
| } |
| |
| n = ngx_write_file(file, buf, size, offset); |
| |
| if (n == NGX_ERROR) { |
| return NGX_ERROR; |
| } |
| |
| total += n; |
| offset += n; |
| } |
| |
| return total; |
| } |
| |
| |
| int ngx_win32_rename_file(ngx_str_t *from, ngx_str_t *to, ngx_pool_t *pool) |
| { |
| int rc, collision; |
| u_int num; |
| u_char *name; |
| |
| if (!(name = ngx_palloc(pool, to->len + 1 + 10 + 1 + sizeof("DELETE")))) { |
| return NGX_ERROR; |
| } |
| |
| ngx_memcpy(name, to->data, to->len); |
| |
| collision = 0; |
| |
| /* mutex_lock() (per cache or single ?) */ |
| |
| do { |
| num = ngx_next_temp_number(collision); |
| |
| ngx_snprintf((char *) name + to->len, 1 + 10 + 1 + sizeof("DELETE"), |
| ".%010u.DELETE", num); |
| |
| if (MoveFile((const char *) to->data, (const char *) name) == 0) { |
| collision = 1; |
| ngx_log_error(NGX_LOG_ERR, pool->log, ngx_errno, |
| "MoveFile() failed"); |
| } |
| |
| } while (collision); |
| |
| if (MoveFile((const char *) from->data, (const char *) to->data) == 0) { |
| rc = NGX_ERROR; |
| |
| } else { |
| rc = NGX_OK; |
| } |
| |
| if (ngx_win32_version >= NGX_WIN_NT) { |
| if (DeleteFile((const char *) name) == 0) { |
| ngx_log_error(NGX_LOG_ERR, pool->log, ngx_errno, |
| "DeleteFile() failed"); |
| } |
| |
| } else { |
| /* TODO: Win9X: update the open files table */ |
| } |
| |
| if (rc == NGX_ERROR) { |
| ngx_log_error(NGX_LOG_ERR, pool->log, ngx_errno, "MoveFile() failed"); |
| } |
| |
| /* mutex_unlock() */ |
| |
| return rc; |
| } |
| |
| |
| #if 0 |
| |
| int ngx_file_info(char *file, ngx_file_info_t *sb) |
| { |
| WIN32_FILE_ATTRIBUTE_DATA fa; |
| |
| /* NT4 and Win98 */ |
| |
| if (GetFileAttributesEx(file, GetFileExInfoStandard, &fa) == 0) { |
| return NGX_ERROR; |
| } |
| |
| sb->dwFileAttributes = fa.dwFileAttributes; |
| sb->ftCreationTime = fa.ftCreationTime; |
| sb->ftLastAccessTime = fa.ftLastAccessTime; |
| sb->ftLastWriteTime = fa.ftLastWriteTime; |
| sb->nFileSizeHigh = fa.nFileSizeHigh; |
| sb->nFileSizeLow = fa.nFileSizeLow; |
| |
| return NGX_OK; |
| } |
| |
| #endif |
| |
| |
| int ngx_file_info(u_char *file, ngx_file_info_t *sb) |
| { |
| /* Win95 */ |
| |
| sb->dwFileAttributes = GetFileAttributes((const char *) file); |
| |
| if (sb->dwFileAttributes == INVALID_FILE_ATTRIBUTES) { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| int ngx_open_dir(ngx_str_t *name, ngx_dir_t *dir) |
| { |
| ngx_cpystrn(name->data + name->len, NGX_DIR_MASK, NGX_DIR_MASK_LEN + 1); |
| |
| dir->dir = FindFirstFile((const char *) name->data, &dir->fd); |
| |
| if (dir->dir == INVALID_HANDLE_VALUE) { |
| return NGX_ERROR; |
| } |
| |
| dir->valid_info = 1; |
| dir->ready = 1; |
| |
| return NGX_OK; |
| } |
| |
| |
| int ngx_read_dir(ngx_dir_t *dir) |
| { |
| if (dir->ready) { |
| dir->ready = 0; |
| return NGX_OK; |
| } |
| |
| if (FindNextFile(dir->dir, &dir->fd) == 0) { |
| return NGX_ERROR; |
| } |
| |
| return NGX_OK; |
| } |
| |
| |
| int ngx_file_append_mode(ngx_fd_t fd) |
| { |
| if (SetFilePointer(fd, 0, NULL, FILE_END) == INVALID_SET_FILE_POINTER) { |
| if (ngx_errno != NO_ERROR) { |
| return NGX_ERROR; |
| } |
| } |
| |
| return NGX_OK; |
| } |
