CPIO(5)                                                   CPIO(5)

     NAME
          cpio - format of cpio archive

     DESCRIPTION
          The header structure, when the -c option of cpio(1) is not
          used, is:

               typdef unsigned short ushort;
               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 -c 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);

          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 struc-
          tures, archive, together with other items describing the
          file.  Every instance of h_magic contains the constant
          070707 (octal).  The items h_dev through h_mtime have mean-
          ings explained in stat(2). 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
          TRAILER!!!.  Special files, directories, and the trailer are
          recorded with h_filesize equal to zero.

     SEE ALSO
          cpio(1), find(1), stat(2).