CPIO(4)                  DOMAIN/IX SYS5                   CPIO(4)



NAME
     cpio - format of the 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 pathname 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.

RELATED INFORMATION
     cpio(1), find(1), stat(2)





Printed 12/4/86                                            CPIO-1