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/* $OpenBSD: tar.h,v 1.3 1997/02/09 23:58:37 millert Exp $ */
/*
* 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.
*
*/
/*
* 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
* it is not already set.
*/
#ifndef TAR_EXTERN
#define TAR_EXTERN extern
#endif
/*
* 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 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 */
/*
* Global variables
*/
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
* f_oldarch V7
* neither 4.2BSD
* 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.
*/
struct name {
struct name *next;
short length;
char found;
char name[NAMSIZ+1];
};
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.
*/
struct link {
struct link *next;
dev_t dev;
ino_t ino;
short linkcount;
char name[NAMSIZ+1];
};
TAR_EXTERN struct link *linklist; /* Points to first link in list */
/*
* Error recovery stuff
*/
TAR_EXTERN char read_error_flag;
/*
* Declarations of functions available to the world.
*/
/*LINTLIBRARY*/
union record *findrec();
void userec();
union record *endofrecs();
void anno();
#define annorec(stream, msg) anno(stream, msg, 0) /* Cur rec */
#define annofile(stream, msg) anno(stream, msg, 1) /* Saved rec */
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