CPIO(4)              INTERACTIVE UNIX System              CPIO(4)



          NAME
               cpio - format of cpio archive

          DESCRIPTION
               The header structure, when the -c option of cpio(1) 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 -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
               stat(2).
               cpio(1), find(1) in the INTERACTIVE UNIX System
               User's/System Administrator's Reference Manual.







          Rev.                                                       Page 1