303 lines
9.4 KiB
C
303 lines
9.4 KiB
C
/* Declarations for tar archives.
|
|
Copyright (C) 1988, 1992, 1993 Free Software Foundation
|
|
|
|
This file is part of GNU Tar.
|
|
|
|
GNU Tar is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Tar is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Tar; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
/* major() and minor() macros (among other things) defined here for hpux */
|
|
#ifdef hpux
|
|
#include <sys/mknod.h>
|
|
#endif
|
|
|
|
/*
|
|
* We need to include <sys/types.h> for the u_quad_t definition
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
/*
|
|
* 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
|
|
#define SPARSE_EXT_HDR 21
|
|
#define SPARSE_IN_HDR 4
|
|
|
|
struct sparse
|
|
{
|
|
char offset[12];
|
|
char numbytes[12];
|
|
};
|
|
|
|
struct sp_array
|
|
{
|
|
int offset;
|
|
int numbytes;
|
|
};
|
|
|
|
union record
|
|
{
|
|
char charptr[RECORDSIZE];
|
|
struct header
|
|
{
|
|
char arch_name[NAMSIZ];
|
|
char mode[8];
|
|
char uid[8];
|
|
char gid[8];
|
|
char size[12];
|
|
char mtime[12];
|
|
char chksum[8];
|
|
char linkflag;
|
|
char arch_linkname[NAMSIZ];
|
|
char magic[8];
|
|
char uname[TUNMLEN];
|
|
char gname[TGNMLEN];
|
|
char devmajor[8];
|
|
char devminor[8];
|
|
/* these following fields were added by JF for gnu */
|
|
/* and are NOT standard */
|
|
char atime[12];
|
|
char ctime[12];
|
|
char offset[12];
|
|
char longnames[4];
|
|
#ifdef NEEDPAD
|
|
char pad;
|
|
#endif
|
|
struct sparse sp[SPARSE_IN_HDR];
|
|
char isextended;
|
|
char realsize[12]; /* true size of the sparse file */
|
|
/* char ending_blanks[12];*//* number of nulls at the
|
|
end of the file, if any */
|
|
}
|
|
header;
|
|
struct extended_header
|
|
{
|
|
struct sparse sp[21];
|
|
char isextended;
|
|
}
|
|
ext_hdr;
|
|
};
|
|
|
|
/* 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. */
|
|
|
|
/* Note that the standards committee allows only capital A through
|
|
capital Z for user-defined expansion. This means that defining something
|
|
as, say '8' is a *bad* idea. */
|
|
#define LF_DUMPDIR 'D' /* This is a dir entry that contains
|
|
the names of files that were in
|
|
the dir at the time the dump
|
|
was made */
|
|
#define LF_LONGLINK 'K' /* Identifies the NEXT file on the tape
|
|
as having a long linkname */
|
|
#define LF_LONGNAME 'L' /* Identifies the NEXT file on the tape
|
|
as having a long name. */
|
|
#define LF_MULTIVOL 'M' /* This is the continuation
|
|
of a file that began on another
|
|
volume */
|
|
#define LF_NAMES 'N' /* For storing filenames that didn't
|
|
fit in 100 characters */
|
|
#define LF_SPARSE 'S' /* This is for sparse files */
|
|
#define LF_VOLHDR 'V' /* This file is a tape/volume header */
|
|
/* Ignore it on extraction */
|
|
|
|
/*
|
|
* 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 */
|
|
#define EX_BADVOL 5 /* Special error code means
|
|
Tape volume doesn't match the one
|
|
specified on the command line */
|
|
#define EX_BADDIR 6 /* bad directory name */
|
|
|
|
/*
|
|
* 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 *info_script; /* Script to run at end of each tape change */
|
|
TAR_EXTERN char *name_file; /* File containing names to work on */
|
|
TAR_EXTERN char filename_terminator; /* \n or \0. */
|
|
TAR_EXTERN char *tar; /* Name of this program */
|
|
TAR_EXTERN struct sp_array *sparsearray; /* Pointer to the start of the scratch space */
|
|
TAR_EXTERN int sp_array_size; /* Initial size of the sparsearray */
|
|
TAR_EXTERN u_quad_t tot_written; /* Total written to output */
|
|
TAR_EXTERN struct re_pattern_buffer
|
|
*label_pattern; /* compiled regex for extract label */
|
|
TAR_EXTERN char **ar_files; /* list of tape drive names */
|
|
TAR_EXTERN int n_ar_files; /* number of tape drive names */
|
|
TAR_EXTERN int cur_ar_file; /* tape drive currently being used */
|
|
TAR_EXTERN int ar_files_len; /* malloced size of ar_files */
|
|
TAR_EXTERN char *current_file_name, *current_link_name;
|
|
|
|
/*
|
|
* Flags from the command line
|
|
*/
|
|
TAR_EXTERN int cmd_mode;
|
|
#define CMD_NONE 0
|
|
#define CMD_CAT 1 /* -A */
|
|
#define CMD_CREATE 2 /* -c */
|
|
#define CMD_DIFF 3 /* -d */
|
|
#define CMD_APPEND 4 /* -r */
|
|
#define CMD_LIST 5 /* -t */
|
|
#define CMD_UPDATE 6 /* -u */
|
|
#define CMD_EXTRACT 7 /* -x */
|
|
#define CMD_DELETE 8 /* -D */
|
|
#define CMD_VERSION 9 /* --version */
|
|
|
|
|
|
TAR_EXTERN int f_reblock; /* -B */
|
|
TAR_EXTERN int f_dironly; /* -n */
|
|
TAR_EXTERN int f_run_script_at_end; /* -F */
|
|
TAR_EXTERN int f_gnudump; /* -G */
|
|
TAR_EXTERN int f_follow_links; /* -h */
|
|
TAR_EXTERN int f_ignorez; /* -i */
|
|
TAR_EXTERN int f_keep; /* -k */
|
|
TAR_EXTERN int f_startfile; /* -K */
|
|
TAR_EXTERN int f_local_filesys; /* -l */
|
|
TAR_EXTERN int tape_length; /* -L */
|
|
TAR_EXTERN int f_modified; /* -m */
|
|
TAR_EXTERN int f_multivol; /* -M */
|
|
TAR_EXTERN int f_new_files; /* -N */
|
|
TAR_EXTERN int f_oldarch; /* -o */
|
|
TAR_EXTERN int f_exstdout; /* -O */
|
|
TAR_EXTERN int f_use_protection;/* -p */
|
|
TAR_EXTERN int f_absolute_paths;/* -P */
|
|
TAR_EXTERN int f_sayblock; /* -R */
|
|
TAR_EXTERN int f_sorted_names; /* -s */
|
|
TAR_EXTERN int f_sparse_files; /* -S ... JK */
|
|
TAR_EXTERN int f_namefile; /* -T */
|
|
TAR_EXTERN int f_verbose; /* -v */
|
|
TAR_EXTERN char *f_volhdr; /* -V */
|
|
TAR_EXTERN int f_confirm; /* -w */
|
|
TAR_EXTERN int f_verify; /* -W */
|
|
TAR_EXTERN int f_exclude; /* -X */
|
|
TAR_EXTERN char *f_compressprog; /* -z and -Z */
|
|
TAR_EXTERN int f_do_chown; /* --do-chown */
|
|
TAR_EXTERN int f_totals; /* --totals */
|
|
TAR_EXTERN int f_remove_files; /* --remove-files */
|
|
TAR_EXTERN int f_ignore_failed_read; /* --ignore-failed-read */
|
|
TAR_EXTERN int f_checkpoint; /* --checkpoint */
|
|
TAR_EXTERN int f_show_omitted_dirs; /* --show-omitted-dirs */
|
|
TAR_EXTERN char *f_volno_file; /* --volno-file */
|
|
TAR_EXTERN int f_force_local; /* --force-local */
|
|
TAR_EXTERN int f_atime_preserve;/* --atime-preserve */
|
|
TAR_EXTERN int f_compress_block; /* --compress-block */
|
|
TAR_EXTERN int f_unlink; /* --unlink */
|
|
TAR_EXTERN int f_fast_read; /* --fast-read */
|
|
|
|
/*
|
|
* We 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 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; /* cached strlen(name) */
|
|
char found; /* A matching file has been found */
|
|
char firstch; /* First char is literally matched */
|
|
char regexp; /* This name is a regexp, not literal */
|
|
char *change_dir; /* JF set with the -C option */
|
|
char *dir_contents; /* JF for f_gnudump */
|
|
char fake; /* dummy entry */
|
|
char name[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 */
|
|
|
|
TAR_EXTERN char *gnu_dumpfile;
|
|
|
|
/*
|
|
* Error recovery stuff
|
|
*/
|
|
TAR_EXTERN char read_error_flag;
|
|
|
|
/*
|
|
* global boolean, see name_match in tar.c
|
|
*/
|
|
extern int nlpsfreed;
|
|
|
|
/*
|
|
* Declarations of functions available to the world.
|
|
*/
|
|
union record *findrec ();
|
|
void userec ();
|
|
union record *endofrecs ();
|
|
void anno ();
|
|
|
|
#if defined (HAVE_VPRINTF) && __STDC__
|
|
void msg (char *,...);
|
|
void msg_perror (char *,...);
|
|
#else
|
|
void msg ();
|
|
void msg_perror ();
|
|
#endif
|