|
The archiver, also known simply as ar, is a Unix utility that maintains groups of files as a single archive file. Today, ar is generally used only to create and update static library files that the link editor or linker uses; it can be used to create archives for any purpose, but has been largely replaced by tar for purposes other than static libraries.〔(【引用サイトリンク】url=http://tldp.org/HOWTO/Program-Library-HOWTO/static-libraries.html )〕 An implementation of ar is included as one of the GNU Binutils.〔(【引用サイトリンク】url=http://linux.die.net/man/1/ar )〕 In the Linux Standard Base, ar has been deprecated and is expected to disappear in a future release of that Standard. The rationale provided was that "the LSB does not include software development utilities nor does it specify .o and .a file formats."〔Linux Standard Base Core Specification, version 4.1, Chapter 15. Commands and Utilities > (ar )〕 ==File format details== The ar format has never been standardized; modern archives are based on a common format with two main variants, BSD and System V (initially known as COFF, and used as well by GNU, ELF, and Windows.) Historically there have been other variants〔, (chapter 6: Libraries )〕 including V6, V7, AIX (small and big), and Coherent, which all vary significantly from the common format.〔(Manual page for NET/2 ar file format )〕 Debian ".deb" archives use the common format. An ar file begins with a global header, followed by a header and data section for each file stored within the ar file. Each data section is 2 byte aligned. If it would end on an odd offset, a newline ('\n', 0x0A) is used as filler. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ar (Unix)」の詳細全文を読む スポンサード リンク
|