unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (OSF1-V5.1-alpha)
Page:
Section:
Apropos / Subsearch:
optional field



cpio(4)								      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);

  The 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(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.

RELATED	INFORMATION

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