| /* |
| * Header file for public domain tar (tape archive) program. |
| * |
| * @(#)tar.h 1.20 86/10/29 Public Domain. |
| * |
| * Created 25 August 1985 by John Gilmore, ihnp4!hoptoad!gnu. |
| * |
| * $Id: is_tar.h,v 1.2 2007/02/11 00:41:13 tkojm Exp $ # checkin only |
| */ |
| |
| /* |
| * Header block on tape. |
| * |
| * I'm going to use traditional DP naming conventions here. |
| * A "block" is a big chunk of stuff that we do I/O on. |
| * A "record" is a piece of info that we care about. |
| * Typically many "record"s fit into a "block". |
| */ |
| #define RECORDSIZE 512 |
| #define NAMSIZ 100 |
| #define TUNMLEN 32 |
| #define TGNMLEN 32 |
| |
| union record { |
| char charptr[RECORDSIZE]; |
| struct header { |
| char name[NAMSIZ]; |
| char mode[8]; |
| char uid[8]; |
| char gid[8]; |
| char size[12]; |
| char mtime[12]; |
| char chksum[8]; |
| char linkflag; |
| char linkname[NAMSIZ]; |
| char magic[8]; |
| char uname[TUNMLEN]; |
| char gname[TGNMLEN]; |
| char devmajor[8]; |
| char devminor[8]; |
| } header; |
| }; |
| |
| /* The magic field is filled with this if uname and gname are valid. */ |
| #define TMAGIC "ustar " /* 7 chars and a null */ |
| |
| int is_tar(unsigned char *buf, unsigned int nbytes); |
