home *** CD-ROM | disk | FTP | other *** search
-
- N.048 April 15, 1987 ``a proposal for a cpio format to be added to
- Chapter 10,'' Lorraine C. Kevra, AT&T.
-
- Secretary, IEEE Standards Board:
-
- The attached is a proposal for a cpio format to be added to Chapter 10
- (Data Interchange Format) of the POSIX Standard.
-
- Lorraine C. Kevra
-
- 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);
-
- *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 describeing 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.
-
- SEE ALSO
- stat(2) in the *Programmer's Reference Manual*.
- cpio(1), find(1) in the *User's Reference Manual*.
-
- Volume-Number: Volume 11, Number 14
-
-