ARCHIVE(V) 9/10/73 ARCHIVE(V) NAME ar - archive (library) file format DESCRIPTION The archive command ar is used to combine several files into one. Archives are used mainly as libraries to be searched by the link-editor ld. A file produced by ar has a magic number at the start, followed by the constituent files, each preceded by a file header. The magic number is 177555(8) (it was chosen to be unlikely to occur anywhere else). The header of each file is 16 bytes long: 0-7 file name, null padded on the right 8-11 modification time of the file 12 user ID of file owner 13 file mode 14-15 file size If the file is an odd number of bytes long, it is padded with a null byte, but the size in the header is correct. Notice there is no provision for empty areas in an archive file. SEE ALSO ar, ld (I) BUGS Names are only 8 characters, not 14. More important, there isn't enough room to store the proper mode, so ar always extracts in mode 666.