* 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.
* tar.h,v 1.2 1993/06/10 00:38:20 jtc Exp # checkin only
* Kludge for handling systems that can't cope with multiple
* external definitions of a variable. In ONE routine (tar.c),
* we #define TAR_EXTERN to null; here, we set it to "extern" if
#define TAR_EXTERN extern
* 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".
char charptr
[RECORDSIZE
];
/* The checksum field is filled with this while the checksum is computed. */
#define CHKBLANKS " " /* 8 blanks, no null */
/* The magic field is filled with this if uname and gname are valid. */
#define TMAGIC "ustar " /* 7 chars and a null */
/* The linkflag defines the type of file */
#define LF_OLDNORMAL '\0' /* Normal disk file, Unix compat */
#define LF_NORMAL '0' /* Normal disk file */
#define LF_LINK '1' /* Link to previously dumped file */
#define LF_SYMLINK '2' /* Symbolic link */
#define LF_CHR '3' /* Character special file */
#define LF_BLK '4' /* Block special file */
#define LF_DIR '5' /* Directory */
#define LF_FIFO '6' /* FIFO special file */
#define LF_CONTIG '7' /* Contiguous file */
/* Further link types may be defined later. */
* Exit codes from the "tar" program
#define EX_SUCCESS 0 /* success! */
#define EX_ARGSBAD 1 /* invalid args */
#define EX_BADFILE 2 /* invalid filename */
#define EX_BADARCH 3 /* bad archive */
#define EX_SYSTEM 4 /* system gave unexpected error */
TAR_EXTERN
union record
*ar_block
; /* Start of block of archive */
TAR_EXTERN
union record
*ar_record
; /* Current record of archive */
TAR_EXTERN
union record
*ar_last
; /* Last+1 record of archive block */
TAR_EXTERN
char ar_reading
; /* 0 writing, !0 reading archive */
TAR_EXTERN
int blocking
; /* Size of each block, in records */
TAR_EXTERN
int blocksize
; /* Size of each block, in bytes */
TAR_EXTERN
char *ar_file
; /* File containing archive */
TAR_EXTERN
char *name_file
; /* File containing names to work on */
TAR_EXTERN
char *tar
; /* Name of this program */
* Flags from the command line
TAR_EXTERN
char f_reblock
; /* -B */
TAR_EXTERN
char f_create
; /* -c */
TAR_EXTERN
char f_debug
; /* -d */
TAR_EXTERN
char f_sayblock
; /* -D */
TAR_EXTERN
char f_follow_links
; /* -h */
TAR_EXTERN
char f_ignorez
; /* -i */
TAR_EXTERN
char f_keep
; /* -k */
TAR_EXTERN
char f_modified
; /* -m */
TAR_EXTERN
char f_oldarch
; /* -o */
TAR_EXTERN
char f_use_protection
; /* -p */
TAR_EXTERN
char f_sorted_names
; /* -s */
TAR_EXTERN
char f_list
; /* -t */
TAR_EXTERN
char f_namefile
; /* -T */
TAR_EXTERN
char f_verbose
; /* -v */
TAR_EXTERN
char f_extract
; /* -x */
TAR_EXTERN
char f_compress
; /* -z */
* We now default to Unix Standard format rather than 4.2BSD tar format.
* The code can actually produce all three:
* f_standard ANSI standard
* but we don't bother, since 4.2BSD can read ANSI standard format anyway.
* The only advantage to the "neither" option is that we can cmp(1) our
* output to the output of 4.2BSD tar, for debugging.
#define f_standard (!f_oldarch)
* Structure for keeping track of filenames and lists thereof.
TAR_EXTERN
struct name
*namelist
; /* Points to first name in list */
TAR_EXTERN
struct name
*namelast
; /* Points to last name in list */
TAR_EXTERN
int archive
; /* File descriptor for archive file */
TAR_EXTERN
int errors
; /* # of files in error */
* Due to the next struct declaration, each routine that includes
* "tar.h" must also include <sys/types.h>. I tried to make it automatic,
* but System V has no defines in <sys/types.h>, so there is no way of
* knowing when it has been included. In addition, it cannot be included
* twice, but must be included exactly once. Argghh!
* Thanks, typedef. Thanks, USG.
TAR_EXTERN
struct link
*linklist
; /* Points to first link in list */
TAR_EXTERN
char read_error_flag
;
* Declarations of functions available to the world.
union record
*endofrecs();
#define annorec(stream, msg) anno(stream, msg, 0) /* Cur rec */
#define annofile(stream, msg) anno(stream, msg, 1) /* Saved rec */