| 1 | /*-
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| 2 | * Copyright (c) 1992 Keith Muller.
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| 3 | * Copyright (c) 1992, 1993
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| 4 | * The Regents of the University of California. All rights reserved.
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| 5 | *
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| 6 | * This code is derived from software contributed to Berkeley by
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| 7 | * Keith Muller of the University of California, San Diego.
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| 8 | *
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| 9 | * Redistribution and use in source and binary forms, with or without
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| 10 | * modification, are permitted provided that the following conditions
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| 11 | * are met:
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| 12 | * 1. Redistributions of source code must retain the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer.
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright
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| 15 | * notice, this list of conditions and the following disclaimer in the
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| 16 | * documentation and/or other materials provided with the distribution.
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| 17 | * 4. Neither the name of the University nor the names of its contributors
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| 18 | * may be used to endorse or promote products derived from this software
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| 19 | * without specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 31 | * SUCH DAMAGE.
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| 32 | *
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| 33 | * @(#)pax.h 8.2 (Berkeley) 4/18/94
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| 34 | * $FreeBSD: src/bin/pax/pax.h,v 1.18 2004/04/06 20:06:48 markm Exp $
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| 35 | */
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| 36 |
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| 37 |
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| 38 | #include <minix/config.h>
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| 39 | #include <minix/const.h>
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| 40 |
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| 41 | /*
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| 42 | * BSD PAX global data structures and constants.
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| 43 | */
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| 44 |
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| 45 | #define MAXBLK 64512 /* MAX blocksize supported (posix SPEC) */
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| 46 | /* WARNING: increasing MAXBLK past 32256 */
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| 47 | /* will violate posix spec. */
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| 48 | #define MAXBLK_POSIX 32256 /* MAX blocksize supported as per POSIX */
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| 49 | #define BLKMULT 512 /* blocksize must be even mult of 512 bytes */
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| 50 | /* Don't even think of changing this */
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| 51 | #define DEVBLK 8192 /* default read blksize for devices */
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| 52 | #define FILEBLK 10240 /* default read blksize for files */
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| 53 | #define PAXPATHLEN 3072 /* maximum path length for pax. MUST be */
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| 54 | /* longer than the system PATH_MAX */
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| 55 |
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| 56 | /*
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| 57 | * Pax modes of operation
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| 58 | */
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| 59 | #define LIST 0 /* List the file in an archive */
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| 60 | #define EXTRACT 1 /* extract the files in an archive */
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| 61 | #define ARCHIVE 2 /* write a new archive */
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| 62 | #define APPND 3 /* append to the end of an archive */
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| 63 | #define COPY 4 /* copy files to destination dir */
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| 64 | #define DEFOP LIST /* if no flags default is to LIST */
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| 65 |
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| 66 | /*
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| 67 | * Device type of the current archive volume
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| 68 | */
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| 69 | #define ISREG 0 /* regular file */
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| 70 | #define ISCHR 1 /* character device */
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| 71 | #define ISBLK 2 /* block device */
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| 72 | #define ISTAPE 3 /* tape drive */
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| 73 | #define ISPIPE 4 /* pipe/socket */
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| 74 |
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| 75 | typedef struct archd ARCHD;
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| 76 | typedef struct fsub FSUB;
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| 77 | typedef struct oplist OPLIST;
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| 78 | typedef struct pattern PATTERN;
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| 79 |
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| 80 | /*
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| 81 | * Format Specific Routine Table
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| 82 | *
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| 83 | * The format specific routine table allows new archive formats to be quickly
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| 84 | * added. Overall pax operation is independent of the actual format used to
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| 85 | * form the archive. Only those routines which deal directly with the archive
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| 86 | * are tailored to the oddities of the specific format. All other routines are
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| 87 | * independent of the archive format. Data flow in and out of the format
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| 88 | * dependent routines pass pointers to ARCHD structure (described below).
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| 89 | */
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| 90 | struct fsub {
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| 91 | const char *name; /* name of format, this is the name the user */
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| 92 | /* gives to -x option to select it. */
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| 93 | int bsz; /* default block size. used when the user */
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| 94 | /* does not specify a blocksize for writing */
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| 95 | /* Appends continue to with the blocksize */
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| 96 | /* the archive is currently using. */
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| 97 | int hsz; /* Header size in bytes. this is the size of */
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| 98 | /* the smallest header this format supports. */
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| 99 | /* Headers are assumed to fit in a BLKMULT. */
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| 100 | /* If they are bigger, get_head() and */
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| 101 | /* get_arc() must be adjusted */
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| 102 | int udev; /* does append require unique dev/ino? some */
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| 103 | /* formats use the device and inode fields */
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| 104 | /* to specify hard links. when members in */
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| 105 | /* the archive have the same inode/dev they */
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| 106 | /* are assumed to be hard links. During */
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| 107 | /* append we may have to generate unique ids */
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| 108 | /* to avoid creating incorrect hard links */
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| 109 | int hlk; /* does archive store hard links info? if */
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| 110 | /* not, we do not bother to look for them */
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| 111 | /* during archive write operations */
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| 112 | int blkalgn; /* writes must be aligned to blkalgn boundary */
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| 113 | int inhead; /* is the trailer encoded in a valid header? */
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| 114 | /* if not, trailers are assumed to be found */
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| 115 | /* in invalid headers (i.e like tar) */
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| 116 | int (*id)(char *, int); /* checks if a buffer is a valid header */
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| 117 | /* returns 1 if it is, o.w. returns a 0 */
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| 118 | int (*st_rd)(void); /* initialize routine for read. so format */
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| 119 | /* can set up tables etc before it starts */
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| 120 | /* reading an archive */
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| 121 | int (*rd)(ARCHD *, char *);
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| 122 | /* read header routine. passed a pointer to */
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| 123 | /* ARCHD. It must extract the info from the */
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| 124 | /* format and store it in the ARCHD struct. */
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| 125 | /* This routine is expected to fill all the */
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| 126 | /* fields in the ARCHD (including stat buf) */
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| 127 | /* 0 is returned when a valid header is */
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| 128 | /* found. -1 when not valid. This routine */
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| 129 | /* set the skip and pad fields so the format */
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| 130 | /* independent routines know the amount of */
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| 131 | /* padding and the number of bytes of data */
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| 132 | /* which follow the header. This info is */
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| 133 | /* used skip to the next file header */
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| 134 | off_t (*end_rd)(void); /* read cleanup. Allows format to clean up */
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| 135 | /* and MUST RETURN THE LENGTH OF THE TRAILER */
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| 136 | /* RECORD (so append knows how many bytes */
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| 137 | /* to move back to rewrite the trailer) */
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| 138 | int (*st_wr)(void); /* initialize routine for write operations */
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| 139 | int (*wr)(ARCHD *); /* write archive header. Passed an ARCHD */
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| 140 | /* filled with the specs on the next file to */
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| 141 | /* archived. Returns a 1 if no file data is */
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| 142 | /* is to be stored; 0 if file data is to be */
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| 143 | /* added. A -1 is returned if a write */
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| 144 | /* operation to the archive failed. this */
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| 145 | /* function sets the skip and pad fields so */
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| 146 | /* the proper padding can be added after */
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| 147 | /* file data. This routine must NEVER write */
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| 148 | /* a flawed archive header. */
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| 149 | int (*end_wr)(void); /* end write. write the trailer and do any */
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| 150 | /* other format specific functions needed */
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| 151 | /* at the end of an archive write */
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| 152 | int (*trail_cpio)(ARCHD *);
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| 153 | int (*trail_tar)(char *, int, int *);
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| 154 | /* returns 0 if a valid trailer, -1 if not */
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| 155 | /* For formats which encode the trailer */
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| 156 | /* outside of a valid header, a return value */
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| 157 | /* of 1 indicates that the block passed to */
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| 158 | /* it can never contain a valid header (skip */
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| 159 | /* this block, no point in looking at it) */
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| 160 | int (*rd_data)(ARCHD *, int, off_t *);
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| 161 | /* read/process file data from the archive */
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| 162 | int (*wr_data)(ARCHD *, int, off_t *);
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| 163 | /* write/process file data to the archive */
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| 164 | int (*options)(void); /* process format specific options (-o) */
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| 165 | };
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| 166 |
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| 167 | /*
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| 168 | * Pattern matching structure
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| 169 | *
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| 170 | * Used to store command line patterns
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| 171 | */
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| 172 | struct pattern {
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| 173 | char *pstr; /* pattern to match, user supplied */
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| 174 | char *pend; /* end of a prefix match */
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| 175 | char *chdname; /* the dir to change to if not NULL. */
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| 176 | int plen; /* length of pstr */
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| 177 | int flgs; /* processing/state flags */
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| 178 | #define MTCH 0x1 /* pattern has been matched */
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| 179 | #define DIR_MTCH 0x2 /* pattern matched a directory */
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| 180 | struct pattern *fow; /* next pattern */
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| 181 | };
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| 182 |
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| 183 | /*
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| 184 | * General Archive Structure (used internal to pax)
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| 185 | *
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| 186 | * This structure is used to pass information about archive members between
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| 187 | * the format independent routines and the format specific routines. When
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| 188 | * new archive formats are added, they must accept requests and supply info
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| 189 | * encoded in a structure of this type. The name fields are declared statically
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| 190 | * here, as there is only ONE of these floating around, size is not a major
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| 191 | * consideration. Eventually converting the name fields to a dynamic length
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| 192 | * may be required if and when the supporting operating system removes all
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| 193 | * restrictions on the length of pathnames it will resolve.
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| 194 | */
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| 195 | struct archd {
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| 196 | int nlen; /* file name length */
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| 197 | char name[PAXPATHLEN+1]; /* file name */
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| 198 | int ln_nlen; /* link name length */
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| 199 | char ln_name[PAXPATHLEN+1]; /* name to link to (if any) */
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| 200 | char *org_name; /* orig name in file system */
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| 201 | PATTERN *pat; /* ptr to pattern match (if any) */
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| 202 | struct stat sb; /* stat buffer see stat(2) */
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| 203 | off_t pad; /* bytes of padding after file xfer */
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| 204 | off_t skip; /* bytes of real data after header */
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| 205 | /* IMPORTANT. The st_size field does */
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| 206 | /* not always indicate the amount of */
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| 207 | /* data following the header. */
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| 208 | u_long crc; /* file crc */
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| 209 | int type; /* type of file node */
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| 210 | #define PAX_DIR 1 /* directory */
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| 211 | #define PAX_CHR 2 /* character device */
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| 212 | #define PAX_BLK 3 /* block device */
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| 213 | #define PAX_REG 4 /* regular file */
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| 214 | #define PAX_SLK 5 /* symbolic link */
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| 215 | #define PAX_SCK 6 /* socket */
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| 216 | #define PAX_FIF 7 /* fifo */
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| 217 | #define PAX_HLK 8 /* hard link */
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| 218 | #define PAX_HRG 9 /* hard link to a regular file */
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| 219 | #define PAX_CTG 10 /* high performance file */
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| 220 | };
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| 221 |
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| 222 | /*
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| 223 | * Format Specific Options List
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| 224 | *
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| 225 | * Used to pass format options to the format options handler
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| 226 | */
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| 227 | struct oplist {
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| 228 | char *name; /* option variable name e.g. name= */
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| 229 | char *value; /* value for option variable */
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| 230 | struct oplist *fow; /* next option */
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| 231 | };
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| 232 |
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| 233 | /*
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| 234 | * General Macros
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| 235 | */
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| 236 | #ifndef MIN
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| 237 | #define MIN(a,b) (((a)<(b))?(a):(b))
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| 238 | #endif
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| 239 | #define TODEV(x, y) makedev((x), (y))
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| 240 |
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| 241 | /*
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| 242 | * General Defines
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| 243 | */
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| 244 | #define HEX 16
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| 245 | #define OCT 8
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| 246 | #define _PAX_ 1
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| 247 | #define _TFILE_BASE "paxXXXXXXXXXX"
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| 248 |
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| 249 | #define err(c, str) { perror(str); exit(c); }
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| 250 | #define setpassent(a) setpwent()
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| 251 | #define setgroupent(a) setgrent()
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