Content-type: text/html Man page of cpio

cpio

Section: Devices and Network Interfaces (4)
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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) delim off


 

Index

NAME
DESCRIPTION
RELATED INFORMATION

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Time: 02:40:02 GMT, October 02, 2010