usr/man/cat5/cpio.0



CPIO(5)             UNIX Programmer's Manual              CPIO(5)


N\bNA\bAM\bME\bE
     cpio - format of cpio archive

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
     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 lenght struc-
     tures, archive, together with other items describing the
     file.  Every instance of h_magic contains the constant
     070707 (octal).  The itimes h_dev through h_mtime have mean-
     ings explained in stat(2).  The length of the null- ter-
     minated path name H_name, icluding 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.

S\bSE\bEE\bE A\bAL\bLS\bSO\bO
     cpio(1), find(1), stat(2)


Printed 7/14/88          March 29, 1988                         1