239 lines
9.9 KiB
C
239 lines
9.9 KiB
C
/*-
|
|
* Copyright (c) 1992 Keith Muller.
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Keith Muller of the University of California, San Diego.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)pax.h 8.2 (Berkeley) 4/18/94
|
|
*/
|
|
|
|
/*
|
|
* BSD PAX global data structures and constants.
|
|
*/
|
|
|
|
#define MAXBLK 32256 /* MAX blocksize supported (posix SPEC) */
|
|
/* WARNING: increasing MAXBLK past 32256 */
|
|
/* will violate posix spec. */
|
|
#define BLKMULT 512 /* blocksize must be even mult of 512 bytes */
|
|
/* Don't even think of changing this */
|
|
#define DEVBLK 8192 /* default read blksize for devices */
|
|
#define FILEBLK 10240 /* default read blksize for files */
|
|
#define PAXPATHLEN 3072 /* maximium path length for pax. MUST be */
|
|
/* longer than the system MAXPATHLEN */
|
|
|
|
/*
|
|
* Pax modes of operation
|
|
*/
|
|
#define LIST 0 /* List the file in an archive */
|
|
#define EXTRACT 1 /* extract the files in an archive */
|
|
#define ARCHIVE 2 /* write a new archive */
|
|
#define APPND 3 /* append to the end of an archive */
|
|
#define COPY 4 /* copy files to destination dir */
|
|
#define DEFOP LIST /* if no flags default is to LIST */
|
|
|
|
/*
|
|
* Device type of the current archive volume
|
|
*/
|
|
#define ISREG 0 /* regular file */
|
|
#define ISCHR 1 /* character device */
|
|
#define ISBLK 2 /* block device */
|
|
#define ISTAPE 3 /* tape drive */
|
|
#define ISPIPE 4 /* pipe/socket */
|
|
|
|
/*
|
|
* Format Specific Routine Table
|
|
*
|
|
* The format specific routine table allows new archive formats to be quickly
|
|
* added. Overall pax operation is independent of the actual format used to
|
|
* form the archive. Only those routines which deal directly with the archive
|
|
* are tailored to the oddities of the specifc format. All other routines are
|
|
* independent of the archive format. Data flow in and out of the format
|
|
* dependent routines pass pointers to ARCHD structure (described below).
|
|
*/
|
|
typedef struct {
|
|
char *name; /* name of format, this is the name the user */
|
|
/* gives to -x option to select it. */
|
|
int bsz; /* default block size. used when the user */
|
|
/* does not specify a blocksize for writing */
|
|
/* Appends continue to with the blocksize */
|
|
/* the archive is currently using.*/
|
|
int hsz; /* Header size in bytes. this is the size of */
|
|
/* the smallest header this format supports. */
|
|
/* Headers are assumed to fit in a BLKMULT. */
|
|
/* If they are bigger, get_head() and */
|
|
/* get_arc() must be adjusted */
|
|
int udev; /* does append require unique dev/ino? some */
|
|
/* formats use the device and inode fields */
|
|
/* to specify hard links. when members in */
|
|
/* the archive have the same inode/dev they */
|
|
/* are assumed to be hard links. During */
|
|
/* append we may have to generate unique ids */
|
|
/* to avoid creating incorrect hard links */
|
|
int hlk; /* does archive store hard links info? if */
|
|
/* not, we do not bother to look for them */
|
|
/* during archive write operations */
|
|
int blkalgn; /* writes must be aligned to blkalgn boundry */
|
|
int inhead; /* is the trailer encoded in a valid header? */
|
|
/* if not, trailers are assumed to be found */
|
|
/* in invalid headers (i.e like tar) */
|
|
int (*id)(); /* checks if a buffer is a valid header */
|
|
/* returns 1 if it is, o.w. returns a 0 */
|
|
int (*st_rd)(); /* initialize routine for read. so format */
|
|
/* can set up tables etc before it starts */
|
|
/* reading an archive */
|
|
int (*rd)(); /* read header routine. passed a pointer to */
|
|
/* ARCHD. It must extract the info from the */
|
|
/* format and store it in the ARCHD struct. */
|
|
/* This routine is expected to fill all the */
|
|
/* fields in the ARCHD (including stat buf) */
|
|
/* 0 is returned when a valid header is */
|
|
/* found. -1 when not valid. This routine */
|
|
/* set the skip and pad fields so the format */
|
|
/* independent routines know the amount of */
|
|
/* padding and the number of bytes of data */
|
|
/* which follow the header. This info is */
|
|
/* used skip to the next file header */
|
|
off_t (*end_rd)(); /* read cleanup. Allows format to clean up */
|
|
/* and MUST RETURN THE LENGTH OF THE TRAILER */
|
|
/* RECORD (so append knows how many bytes */
|
|
/* to move back to rewrite the trailer) */
|
|
int (*st_wr)(); /* initialize routine for write operations */
|
|
int (*wr)(); /* write archive header. Passed an ARCHD */
|
|
/* filled with the specs on the next file to */
|
|
/* archived. Returns a 1 if no file data is */
|
|
/* is to be stored; 0 if file data is to be */
|
|
/* added. A -1 is returned if a write */
|
|
/* operation to the archive failed. this */
|
|
/* function sets the skip and pad fields so */
|
|
/* the proper padding can be added after */
|
|
/* file data. This routine must NEVER write */
|
|
/* a flawed archive header. */
|
|
int (*end_wr)(); /* end write. write the trailer and do any */
|
|
/* other format specific functions needed */
|
|
/* at the ecnd of a archive write */
|
|
int (*trail)(); /* returns 0 if a valid trailer, -1 if not */
|
|
/* For formats which encode the trailer */
|
|
/* outside of a valid header, a return value */
|
|
/* of 1 indicates that the block passed to */
|
|
/* it can never contain a valid header (skip */
|
|
/* this block, no point in looking at it) */
|
|
/* CAUTION: parameters to this function are */
|
|
/* different for trailers inside or outside */
|
|
/* of headers. See get_head() for details */
|
|
int (*rd_data)(); /* read/process file data from the archive */
|
|
int (*wr_data)(); /* write/process file data to the archive */
|
|
int (*options)(); /* process format specific options (-o) */
|
|
} FSUB;
|
|
|
|
/*
|
|
* Pattern matching structure
|
|
*
|
|
* Used to store command line patterns
|
|
*/
|
|
typedef struct pattern {
|
|
char *pstr; /* pattern to match, user supplied */
|
|
char *pend; /* end of a prefix match */
|
|
int plen; /* length of pstr */
|
|
int flgs; /* processing/state flags */
|
|
#define MTCH 0x1 /* pattern has been matched */
|
|
#define DIR_MTCH 0x2 /* pattern matched a directory */
|
|
struct pattern *fow; /* next pattern */
|
|
} PATTERN;
|
|
|
|
/*
|
|
* General Archive Structure (used internal to pax)
|
|
*
|
|
* This structure is used to pass information about archive members between
|
|
* the format independent routines and the format specific routines. When
|
|
* new archive formats are added, they must accept requests and supply info
|
|
* encoded in a structure of this type. The name fields are declared statically
|
|
* here, as there is only ONE of these floating around, size is not a major
|
|
* consideration. Eventually converting the name fields to a dynamic length
|
|
* may be required if and when the supporting operating system removes all
|
|
* restrictions on the length of pathnames it will resolve.
|
|
*/
|
|
typedef struct {
|
|
int nlen; /* file name length */
|
|
char name[PAXPATHLEN+1]; /* file name */
|
|
int ln_nlen; /* link name length */
|
|
char ln_name[PAXPATHLEN+1]; /* name to link to (if any) */
|
|
char *org_name; /* orig name in file system */
|
|
PATTERN *pat; /* ptr to pattern match (if any) */
|
|
struct stat sb; /* stat buffer see stat(2) */
|
|
off_t pad; /* bytes of padding after file xfer */
|
|
off_t skip; /* bytes of real data after header */
|
|
/* IMPORTANT. The st_size field does */
|
|
/* not always indicate the amount of */
|
|
/* data following the header. */
|
|
u_long crc; /* file crc */
|
|
int type; /* type of file node */
|
|
#define PAX_DIR 1 /* directory */
|
|
#define PAX_CHR 2 /* character device */
|
|
#define PAX_BLK 3 /* block device */
|
|
#define PAX_REG 4 /* regular file */
|
|
#define PAX_SLK 5 /* symbolic link */
|
|
#define PAX_SCK 6 /* socket */
|
|
#define PAX_FIF 7 /* fifo */
|
|
#define PAX_HLK 8 /* hard link */
|
|
#define PAX_HRG 9 /* hard link to a regular file */
|
|
#define PAX_CTG 10 /* high performance file */
|
|
} ARCHD;
|
|
|
|
/*
|
|
* Format Specific Options List
|
|
*
|
|
* Used to pass format options to the format options handler
|
|
*/
|
|
typedef struct oplist {
|
|
char *name; /* option variable name e.g. name= */
|
|
char *value; /* value for option variable */
|
|
struct oplist *fow; /* next option */
|
|
} OPLIST;
|
|
|
|
/*
|
|
* General Macros
|
|
*/
|
|
#ifndef MIN
|
|
#define MIN(a,b) (((a)<(b))?(a):(b))
|
|
#endif
|
|
#define MAJOR(x) (((unsigned)(x) >> 8) & 0xff)
|
|
#define MINOR(x) ((x) & 0xff)
|
|
#define TODEV(x, y) (((unsigned)(x) << 8) | ((unsigned)(y)))
|
|
|
|
/*
|
|
* General Defines
|
|
*/
|
|
#define HEX 16
|
|
#define OCT 8
|
|
#define _PAX_ 1
|