ultrix man page for cpio

cpio(5) 							File Formats Manual							   cpio(5)

Name
       cpio - format of cpio archive

Description
       The header structure, when the option of is not used, is:
       struct {
		  short   h_magic,
			  h_dev;
		  ushort  h_ino,
			  h_mode,
			  h_uid,
			  h_gid;
		  short   h_nlink,
			  h_rdev
			  h_mtime[2],
			  h_namesize,
			  h_filesize[2]'
		  char	  h_name[h_namesize rounded to word];
       } Hdr;
       When the option is used, the header information is described by:
       sscanf(Chdr,"%6o%6o%6o%6o%6o%6o%6o%6o%11lo%6o%11lo%s",
	     &Hdr.h_magic, &Hdr.h_dev, &Hdr.h_ino, &Hdr.h_mode,
	     &Hdr.h_uid, &Hdr.h_gid, &Hdr.h_nlink, &Hdr.h_rdev,
	     &Longtime, &Hdr.h_namesize,&Longfile,Hdr.h_name);
       The  Longtime  and  Longfile  are equivalent to Hdr.h_mtime and Hdr.h_filesize, respectively.  The contents of each file are recorded in an
       element of the array of varying length structures, archive, together with other items describing the file.  Every instance of h_magic  con-
       tains  the constant 070707 (octal).  The items h_dev through h_mtime have meanings explained in The length of the null-terminated path name
       h_name, including the null byte, is given by h_namesize.

       The last record of the archive always contains the name Special files, directories, and the trailer are recorded with h_filesize  equal	to
       zero.

See Also
       cpio(1), find(1), stat(2)

																	   cpio(5)