cpio(4)                             CLIX                             cpio(4)



  NAME

    cpio - cpio archive format

  DESCRIPTION

    The header structure, when the -c flag of cpio 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 flag 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 structures, 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 meanings explained
    in stat().  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

    Commands: cpio(1), find(1)

    Functions: stat(2)






  2/94 - Intergraph Corporation                                              1