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Diffstat (limited to 'file/tar.h')
| -rw-r--r-- | file/tar.h | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/file/tar.h b/file/tar.h new file mode 100644 index 000000000..c03139a68 --- /dev/null +++ b/file/tar.h @@ -0,0 +1,177 @@ +/* + * 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: tar.h,v 1.5 1999/01/13 15:44:10 christos 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 + * 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; + + +#if 0 +/* + * Declarations of functions available to the world. + */ +/*LINTLIBRARY*/ +#define annorec(stream, msg) anno(stream, msg, 0) /* Cur rec */ +#define annofile(stream, msg) anno(stream, msg, 1) /* Saved rec */ +#endif |