ⓘ Zero-byte file. A zero-byte file or zero-length file is a computer file containing no data; that is, it has a length or size of zero bytes. Zero-byte files cann ..


ⓘ Zero-byte file

A zero-byte file or zero-length file is a computer file containing no data; that is, it has a length or size of zero bytes.

Zero-byte files cannot be loaded or used by most applications. Even a file describing an empty word processor document, an image file with zero-by-zero dimensions, or an audio file of length zero seconds usually still contains metadata identifying the file format and describing some basic attributes of the file; it results in the file with some positive size. Some very simple formats do not use metadata, such as ASCII text files; these may validly be zero bytes a common convention terminates text files with a one- or two-byte newline, however. Conversely, zero-byte files must use some disk space to be indexed by a filesystem though none for content, in most cases.

In some cases, zero-byte files may be used to convey information like file metadata ; or to put in a directory to ensure that it is nonempty, since some tools such as backup and revision control software may ignore the empty directories.

There are many ways that could manually create a zero-byte file, for example, saving empty content in a text editor, using utilities provided by operating systems, or programming to create it. On Unix-like systems, the shell command $ printf > filename results in a zero-byte file filename. Zero-byte files may arise in cases where a program creates a file but aborts or is interrupted prematurely while writing to it. Because writes are cached in memory and only flushed to disk at a later time page cache, a program that does not flush its writes to disk or terminate normally may result in a zero-byte file. When the zero-byte file is made, file system does not record the files content on storage, but only updates its index table.

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  • the use of UTF - 8 by software that does not expect non - ASCII bytes at the start of a file but that could otherwise handle the text stream. Unicode can
  • block of bytes is at the start of the file and is used to identify the file A typical application reads this block first to ensure that the file is actually
  • Binary files are usually thought of as being a sequence of bytes which means the binary digits bits are grouped in eights. Binary files typically
  • of zero Additionally, for FAT IDs other than 0xFF and 0x00 it is possible to determine the correct nibble and byte order to be used by the file system
  • zero byte file these files can be newly created files that have not yet had any data written to them, or may serve as some kind of flag in the file system
  • multiple of eight bytes and it must be terminated with at least one null zero byte The audio data segment begins on an eight - byte boundary immediately
  • sequence of n bytes of data, represented by 2n hex digits. Some records omit this field n equals zero The meaning and interpretation of data bytes depends
  • 446, 744, 073, 709, 551, 615 bytes 264 1 bytes or 16 EiB minus 1 byte ZIP file format includes an extra field facility within file headers, which can be
  • word joiner strongly preferred. Byte order mark, which uses U FEFF ZERO WIDTH NO - BREAK SPACE ZWNBSP character Zero - width space Layout Controls PDF