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pg_filedump.c
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pg_filedump.c
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/*
* Utility for inspecting binary files of Greenplum Database, derived from
* pg_filedump from Red Hat. Original head follows
*/
/*
* pg_filedump.c - PostgreSQL file dump utility for dumping and
* formatting heap (data), index and control files.
*
* Copyright (c) 2002-2010 Red Hat, Inc.
* Copyright (c) 2011-2019, PostgreSQL Global Development Group
* Copyright (c) 2021 VMware, Inc. or its affiliates
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Original Author: Patrick Macdonald <[email protected]>
* Gavin Sherry <[email protected]>
*/
#include "pg_filedump.h"
#include "gpdb.h"
#include <utils/pg_crc.h>
/* checksum_impl.h uses Assert, which doesn't work outside the server */
#undef Assert
#define Assert(X)
#include "storage/checksum.h"
#include "storage/checksum_impl.h"
#include "decode.h"
/*
* Global variables for ease of use mostly
*/
/* program name */
const char *progname;
/* Options for Block formatting operations */
unsigned int blockOptions = 0;
/* Segment-related options */
unsigned int segmentOptions = 0;
/* -R[start]:Block range start */
int blockStart = -1;
/* -R[end]:Block range end */
int blockEnd = -1;
/* Options for Item formatting operations */
unsigned int itemOptions = 0;
/* Options for Control File formatting operations */
unsigned int controlOptions = 0;
unsigned int specialType = SPEC_SECT_NONE;
static bool verbose = false;
/* File to dump or format */
FILE *fp = NULL;
/* File name for display */
char *fileName = NULL;
/* Current block size */
static unsigned int blockSize = 0;
/* Segment size in bytes */
static unsigned int segmentSize = RELSEG_SIZE * BLCKSZ;
/* Number of current segment */
static unsigned int segmentNumber = 0;
/* Offset of current block */
static unsigned int pageOffset = 0;
/* Number of bytes to format */
static unsigned int bytesToFormat = 0;
/* Block version number */
static unsigned int blockVersion = 0;
/* Program exit code */
static int exitCode = 0;
/*
* Function Prototypes
*/
unsigned int GetBlockSize(FILE *fp);
static void DisplayOptions(unsigned int validOptions);
static unsigned int ConsumeOptions(int numOptions, char **options);
static int GetOptionValue(char *optionString);
static void FormatBlock(unsigned int blockOptions,
unsigned int controlOptions,
char *buffer,
BlockNumber currentBlock,
unsigned int blockSize,
bool isToast,
Oid toastOid,
unsigned int toastExternalSize,
char *toastValue,
unsigned int *toastRead);
static unsigned int GetSpecialSectionType(char *buffer, Page page);
static bool IsBtreeMetaPage(Page page);
static void CreateDumpFileHeader(int numOptions, char **options);
static int FormatHeader(char *buffer,
Page page,
BlockNumber blkno,
bool isToast);
static void FormatItemBlock(char *buffer,
Page page,
bool isToast,
Oid toastOid,
unsigned int toastExternalSize,
char *toastValue,
unsigned int *toastRead);
static void FormatItem(char *buffer,
unsigned int numBytes,
unsigned int startIndex,
unsigned int formatAs);
static void FormatSpecial(char *buffer);
static void FormatControl(char *buffer);
static void FormatBinary(char *buffer,
unsigned int numBytes, unsigned int startIndex);
static void DumpBinaryBlock(char *buffer);
/* Send properly formed usage information to the user. */
static void
DisplayOptions(unsigned int validOptions)
{
/* FIXME: GPDB: gpdb version */
if (validOptions == OPT_RC_COPYRIGHT)
printf
("\nVersion %s (for %s)"
"\nCopyright (c) 2002-2010 Red Hat, Inc."
"\nCopyright (c) 2011-2019, PostgreSQL Global Development Group\n",
FD_VERSION, FD_PG_VERSION);
printf
("\nUsage: pg_filedump [-abcdfhikxy] [-R startblock [endblock]] [-D attrlist] [-S blocksize] [-s segsize] [-n segnumber] file\n\n"
"Display formatted contents of a PostgreSQL heap/index/control file\n"
"Defaults are: relative addressing, range of the entire file, block\n"
" size as listed on block 0 in the file\n\n"
"The following options are valid for heap and index files:\n"
" -a Display absolute addresses when formatting (Block header\n"
" information is always block relative)\n"
" -b Display binary block images within a range (Option will turn\n"
" off all formatting options)\n"
" -d Display formatted block content dump (Option will turn off\n"
" all other formatting options)\n"
" -D Decode tuples using given comma separated list of types\n"
" Supported types:\n"
" bigint bigserial bool char charN date float float4 float8 int\n"
" json macaddr name oid real serial smallint smallserial text\n"
" time timestamp timetz uuid varchar varcharN xid xml\n"
" ~ ignores all attributes left in a tuple\n"
" -f Display formatted block content dump along with interpretation\n"
" -h Display this information\n"
" -i Display interpreted item details\n"
" -k Verify block checksums\n"
" -o Do not dump old values.\n"
#if 0
/* FIXME: GPDB: retire this as -D is a better replacement */
" -p Try and deparse heap data\n"
#endif
" -R Display specific block ranges within the file (Blocks are\n"
" indexed from 0)\n"
" [startblock]: block to start at\n"
" [endblock]: block to end at\n"
" A startblock without an endblock will format the single block\n"
" -s Force segment size to [segsize]\n"
" -t Dump TOAST files\n"
" -v Ouput additional information about TOAST relations\n"
" -n Force segment number to [segnumber]\n"
" -S Force block size to [blocksize]\n"
" -x Force interpreted formatting of block items as index items\n"
" -B Force interpreted formatting of block items as bitmap index items\n"
#if 0
/* FIXME: GPDB: can we remove this option? It's not used even for gpdb4 */
" -X Data directory for the segment\n"
#endif
" -y Force interpreted formatting of block items as heap items\n\n"
"The following options are valid for control files:\n"
" -c Interpret the file listed as a control file\n"
" -f Display formatted content dump along with interpretation\n"
" -S Force block size to [blocksize]\n"
"\nThe following options are valid for AppendOnly Column Oriented Table files:\n"
" -z Interpret the file listed as a AppendOnly file\n"
" -T Compression type (zlib, zstd, quicklz or none),\n"
" default=none if not specified.\n"
" -L Compression level (1-4), default=0 if not specified\n"
" -M Checksum option for AppendOnly files, by default tool considers\n"
" checksums not present\n"
" -O Orientation of AppendOnly table (row or column),\n"
" default=row if not not specified.\n\n"
#if 0
/* FIXME: GPDB: how to use these options? */
" -B Deparse the input block directory file.\n\n"
" -D Disable dead tuple info while deparsing the block directory file.\n\n"
#endif
"\nReport bugs to <[email protected]>\n");
}
/*
* Determine segment number by segment file name. For instance, if file
* name is /path/to/xxxx.7 procedure returns 7. Default return value is 0.
*/
static unsigned int
GetSegmentNumberFromFileName(const char *fileName)
{
int segnumOffset = strlen(fileName) - 1;
if (segnumOffset < 0)
return 0;
while (isdigit(fileName[segnumOffset]))
{
segnumOffset--;
if (segnumOffset < 0)
return 0;
}
if (fileName[segnumOffset] != '.')
return 0;
return atoi(&fileName[segnumOffset + 1]);
}
/* Iterate through the provided options and set the option flags.
* An error will result in a positive rc and will force a display
* of the usage information. This routine returns enum
* optionReturnCode values. */
static unsigned int
ConsumeOptions(int numOptions, char **options)
{
unsigned int rc = OPT_RC_VALID;
unsigned int x;
unsigned int optionStringLength;
char *optionString;
char duplicateSwitch = 0x00;
for (x = 1; x < numOptions; x++)
{
optionString = options[x];
optionStringLength = strlen(optionString);
/* Range is a special case where we have to consume the next 1 or 2
* parameters to mark the range start and end */
if ((optionStringLength == 2) && (strcmp(optionString, "-R") == 0))
{
int range = 0;
SET_OPTION(blockOptions, BLOCK_RANGE, 'R');
/* Only accept the range option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* Make sure there are options after the range identifier */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing range start identifier.\n");
exitCode = 1;
break;
}
/*
* Mark that we have the range and advance the option to what
* should be the range start. Check the value of the next
* parameter */
optionString = options[++x];
if ((range = GetOptionValue(optionString)) < 0)
{
rc = OPT_RC_INVALID;
printf("Error: Invalid range start identifier <%s>.\n",
optionString);
exitCode = 1;
break;
}
/* The default is to dump only one block */
blockStart = blockEnd = (unsigned int) range;
/* We have our range start marker, check if there is an end
* marker on the option line. Assume that the last option
* is the file we are dumping, so check if there are options
* range start marker and the file */
if (x <= (numOptions - 3))
{
if ((range = GetOptionValue(options[x + 1])) >= 0)
{
/* End range must be => start range */
if (blockStart <= range)
{
blockEnd = (unsigned int) range;
x++;
}
else
{
rc = OPT_RC_INVALID;
printf("Error: Requested block range start <%d> is "
"greater than end <%d>.\n", blockStart, range);
exitCode = 1;
break;
}
}
}
}
/* Check for the special case where the user forces a block size
* instead of having the tool determine it. This is useful if
* the header of block 0 is corrupt and gives a garbage block size */
else if ((optionStringLength == 2)
&& (strcmp(optionString, "-S") == 0))
{
int localBlockSize;
SET_OPTION(blockOptions, BLOCK_FORCED, 'S');
/* Only accept the forced size option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* The token immediately following -S is the block size */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing block size identifier.\n");
break;
}
/* Next option encountered must be forced block size */
optionString = options[++x];
if ((localBlockSize = GetOptionValue(optionString)) > 0)
blockSize = (unsigned int) localBlockSize;
else
{
rc = OPT_RC_INVALID;
printf("Error: Invalid block size requested <%s>.\n",
optionString);
exitCode = 1;
break;
}
}
/* Check for the special case where the user forces a segment size. */
else if ((optionStringLength == 2)
&& (strcmp(optionString, "-s") == 0))
{
int localSegmentSize;
SET_OPTION(segmentOptions, SEGMENT_SIZE_FORCED, 's');
/* Only accept the forced size option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* The token immediately following -s is the segment size */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing segment size identifier.\n");
exitCode = 1;
break;
}
/* Next option encountered must be forced segment size */
optionString = options[++x];
if ((localSegmentSize = GetOptionValue(optionString)) > 0)
segmentSize = (unsigned int) localSegmentSize;
else
{
rc = OPT_RC_INVALID;
printf("Error: Invalid segment size requested <%s>.\n",
optionString);
exitCode = 1;
break;
}
}
/* Check for the special case where the user forces tuples decoding. */
else if ((optionStringLength == 2)
&& (strcmp(optionString, "-D") == 0))
{
SET_OPTION(blockOptions, BLOCK_DECODE, 'D');
/* Only accept the decode option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* The token immediately following -D is attrubute types string */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing attribute types string.\n");
exitCode = 1;
break;
}
/* Next option encountered must be attribute types string */
optionString = options[++x];
if (ParseAttributeTypesString(optionString) < 0)
{
rc = OPT_RC_INVALID;
printf("Error: Invalid attribute types string <%s>.\n",
optionString);
exitCode = 1;
break;
}
}
/* Check for the special case where the user forces a segment number
* instead of having the tool determine it by file name. */
else if ((optionStringLength == 2)
&& (strcmp(optionString, "-n") == 0))
{
int localSegmentNumber;
SET_OPTION(segmentOptions, SEGMENT_NUMBER_FORCED, 'n');
/* Only accept the forced segment number option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* The token immediately following -n is the segment number */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing segment number identifier.\n");
exitCode = 1;
break;
}
/* Next option encountered must be forced segment number */
optionString = options[++x];
if ((localSegmentNumber = GetOptionValue(optionString)) > 0)
segmentNumber = (unsigned int) localSegmentNumber;
else
{
rc = OPT_RC_INVALID;
printf("Error: Invalid segment number requested <%s>.\n",
optionString);
exitCode = 1;
break;
}
}
else if ((optionStringLength == 2)
&& (strcmp(optionString, "-T") == 0))
{
/* Only accept the compressType option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* The token immediately following -T is the compressType string */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing compressType identifier.\n");
break;
}
/* Next option encountered must be forced compressType string */
optionString = options[++x];
if (strcmp(optionString, "none") == 0)
{
GPDB_SET_COMPRESS_TYPE(gpdbOptions, GPDB_COMPRESS_TYPE_NONE);
}
#ifdef ENABLE_ZLIB
else if (strcmp(optionString, "zlib") == 0)
{
GPDB_SET_COMPRESS_TYPE(gpdbOptions, GPDB_COMPRESS_TYPE_ZLIB);
}
#endif /* ENABLE_ZLIB */
#ifdef ENABLE_QUICKLZ
else if (strcmp(optionString, "quicklz") == 0)
{
GPDB_SET_COMPRESS_TYPE(gpdbOptions, GPDB_COMPRESS_TYPE_QUICKLZ);
}
#endif /* ENABLE_QUICKLZ */
#ifdef ENABLE_ZSTD
else if (strcmp(optionString, "zstd") == 0)
{
GPDB_SET_COMPRESS_TYPE(gpdbOptions, GPDB_COMPRESS_TYPE_ZSTD);
}
#endif /* ENABLE_ZSTD */
else if (strcmp(optionString, "zlib") == 0 ||
strcmp(optionString, "quicklz") == 0 ||
strcmp(optionString, "zstd") == 0)
{
rc = OPT_RC_INVALID;
printf("Error: compressType <%s> is not supported in current build.\n",
optionString);
break;
}
else
{
rc = OPT_RC_INVALID;
printf("Error: Invalid compressType requested <%s>.\n",
optionString);
break;
}
}
else if ((optionStringLength == 2)
&& (strcmp(optionString, "-L") == 0))
{
int localCompressLevel;
/* Only accept the compressLevel option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* The token immediately following -L is the compressLevel */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing compressLevel identifier.\n");
break;
}
/* Next option encountered must be compressLevel */
optionString = options[++x];
localCompressLevel = GetOptionValue(optionString);
if (localCompressLevel > 0 &&
localCompressLevel <= GPDB_COMPRESS_LEVEL_MAX)
{
GPDB_SET_COMPRESS_LEVEL(gpdbOptions, localCompressLevel);
}
else
{
rc = OPT_RC_INVALID;
printf("Error: Invalid compess level requested <%s>.\n",
optionString);
break;
}
}
else if ((optionStringLength == 2)
&& (strcmp(optionString, "-O") == 0))
{
/* Only accept the orientation option once */
if (rc == OPT_RC_DUPLICATE)
break;
/* The token immediately following -O is the orientation string */
if (x >= (numOptions - 2))
{
rc = OPT_RC_INVALID;
printf("Error: Missing orientation string.\n");
break;
}
/* Next option encountered must be forced orientation string */
optionString = options[++x];
if (strcmp(optionString, "row") == 0)
{
GPDB_SET_ORIENTATION(gpdbOptions, GPDB_ORIENTATION_ROW);
}
else if (strcmp(optionString, "column") == 0)
{
GPDB_SET_ORIENTATION(gpdbOptions, GPDB_ORIENTATION_COLUMN);
}
else
{
rc = OPT_RC_INVALID;
printf("Error: Invalid orientation requested <%s>.\n",
optionString);
break;
}
}
/* The last option MUST be the file name */
else if (x == (numOptions - 1))
{
/* Check to see if this looks like an option string before opening */
if (optionString[0] != '-')
{
fp = fopen(optionString, "rb");
if (fp)
{
fileName = options[x];
if (!(segmentOptions & SEGMENT_NUMBER_FORCED))
segmentNumber = GetSegmentNumberFromFileName(fileName);
}
else
{
rc = OPT_RC_FILE;
printf("Error: Could not open file <%s>.\n", optionString);
exitCode = 1;
break;
}
}
else
{
/* Could be the case where the help flag is used without a
* filename. Otherwise, the last option isn't a file */
if (strcmp(optionString, "-h") == 0)
rc = OPT_RC_COPYRIGHT;
else
{
rc = OPT_RC_FILE;
printf("Error: Missing file name to dump.\n");
exitCode = 1;
}
break;
}
}
else
{
unsigned int y;
/* Option strings must start with '-' and contain switches */
if (optionString[0] != '-')
{
rc = OPT_RC_INVALID;
printf("Error: Invalid option string <%s>.\n", optionString);
exitCode = 1;
break;
}
/* Iterate through the singular option string, throw out
* garbage, duplicates and set flags to be used in formatting */
for (y = 1; y < optionStringLength; y++)
{
switch (optionString[y])
{
/* Use absolute addressing */
case 'a':
SET_OPTION(blockOptions, BLOCK_ABSOLUTE, 'a');
break;
/* Dump the binary contents of the page */
case 'b':
SET_OPTION(blockOptions, BLOCK_BINARY, 'b');
break;
/* Dump the listed file as a control file */
case 'c':
SET_OPTION(controlOptions, CONTROL_DUMP, 'c');
break;
/* Do not interpret the data. Format to hex and ascii. */
case 'd':
SET_OPTION(blockOptions, BLOCK_NO_INTR, 'd');
break;
/*
* Format the contents of the block with
* interpretation of the headers */
case 'f':
SET_OPTION(blockOptions, BLOCK_FORMAT, 'f');
break;
/* Display the usage screen */
case 'h':
rc = OPT_RC_COPYRIGHT;
break;
/* Format the items in detail */
case 'i':
SET_OPTION(itemOptions, ITEM_DETAIL, 'i');
break;
/* Verify block checksums */
case 'k':
SET_OPTION(blockOptions, BLOCK_CHECKSUMS, 'k');
break;
/* Display old values. Ignore Xmax */
case 'o':
SET_OPTION(blockOptions, BLOCK_IGNORE_OLD, 'o');
break;
case 't':
SET_OPTION(blockOptions, BLOCK_DECODE_TOAST, 't');
break;
case 'v':
verbose = true;
break;
/* Interpret page as bitmap index */
case 'B':
SET_OPTION(blockOptions, BLOCK_BITMAP, 'B');
/* Fall through */
/* Interpret items as standard index values */
case 'x':
SET_OPTION(itemOptions, ITEM_INDEX, 'x');
if (itemOptions & ITEM_HEAP)
{
rc = OPT_RC_INVALID;
printf("Error: Options <y> and <x> are "
"mutually exclusive.\n");
exitCode = 1;
}
break;
/* Interpret items as heap values */
case 'y':
SET_OPTION(itemOptions, ITEM_HEAP, 'y');
if (itemOptions & ITEM_INDEX)
{
rc = OPT_RC_INVALID;
printf("Error: Options <x> and <y> are "
"mutually exclusive.\n");
exitCode = 1;
}
break;
#if 0
/* FIXME: GPDB: retire -p */
case 'p':
SET_OPTION(gpdbOptions, GPDB_DEPARSE_HEAP, 'p');
if (itemOptions & ITEM_INDEX)
{
rc = OPT_RC_INVALID;
printf("Error: Options <p> and <x> are "
"mutually exclusive.\n");
}
break;
#endif
case 'M':
SET_OPTION(gpdbOptions, GPDB_HAS_CHECKSUM, 'M');
break;
case 'z':
SET_OPTION(gpdbOptions, GPDB_APPEND_ONLY, 'z');
break;
#if 0
/* FIXME: GPDB: how to use -D and -B? */
/*
* Do not interpret the data. Format
* to hex and ascii.
*/
case 'B':
SET_OPTION(gpdbOptions, GPDB_BLOCK_DIRECTORY_FILE, 'B');
SET_OPTION(gpdbOptions, GPDB_DEPARSE_HEAP, 'p');
SET_OPTION(itemOptions, ITEM_DETAIL, 'i');
if (itemOptions & ITEM_INDEX)
{
rc = OPT_RC_INVALID;
printf("Error: Options <p> and <x> are mutually exclusive.\n");
}
break;
case 'D':
SET_OPTION(gpdbOptions, GPDB_DISABLE_DEAD_TUPLE, 'D');
break;
#endif
default:
rc = OPT_RC_INVALID;
printf("Error: Unknown option <%c>.\n", optionString[y]);
exitCode = 1;
break;
}
if (rc)
break;
}
}
}
#if 0
/* FIXME: GPDB: how to use -D and -B? */
if ((gpdbOptions & GPDB_DISABLE_DEAD_TUPLE) &&
!(gpdbOptions & GPDB_BLOCK_DIRECTORY_FILE))
{
printf("-D option should be used with -B\n");
exitCode = 1;
}
#endif
if (rc == OPT_RC_DUPLICATE)
{
printf("Error: Duplicate option listed <%c>.\n", duplicateSwitch);
exitCode = 1;
}
/* If the user requested a control file dump, a pure binary
* block dump or a non-interpreted formatted dump, mask off
* all other block level options (with a few exceptions) */
if (rc == OPT_RC_VALID)
{
/* The user has requested a control file dump, only -f and */
/* -S are valid... turn off all other formatting */
if (controlOptions & CONTROL_DUMP)
{
if ((blockOptions & ~(BLOCK_FORMAT | BLOCK_FORCED))
|| (itemOptions))
{
rc = OPT_RC_INVALID;
printf("Error: Invalid options used for Control File dump.\n"
" Only options <Sf> may be used with <c>.\n");
exitCode = 1;
}
else
{
controlOptions |=
(blockOptions & (BLOCK_FORMAT | BLOCK_FORCED));
blockOptions = itemOptions = 0;
}
}
/* The user has requested a appendOnly Column oriented file dump */
/* -M, -T and -L are valid... turn off all other formatting */
else if (gpdbOptions & GPDB_APPEND_ONLY)
{
#if 0
/* FIXME: GPDB: some options are moved to gpdbOptions */
if ((itemOptions & ~ITEM_CHECKSUM) || blockOptions)
{
rc = OPT_RC_INVALID;
printf("Error: Invalid options used for Append Only Column Oriented File dump.\n"
" Only <MTL> can be used with <z> option.\n");
}
else
#endif
{
blockOptions &= BLOCK_CHECKSUMS;
itemOptions = 0;
}
}
/* The user has requested a binary block dump... only -R and -f
* are honoured */
else if (blockOptions & BLOCK_BINARY)
{
blockOptions &= (BLOCK_BINARY | BLOCK_RANGE | BLOCK_FORCED);
itemOptions = 0;
}
/* The user has requested a non-interpreted dump... only -a, -R
* and -f are honoured */
else if (blockOptions & BLOCK_NO_INTR)
{
blockOptions &=
(BLOCK_NO_INTR | BLOCK_ABSOLUTE | BLOCK_RANGE | BLOCK_FORCED);
itemOptions = 0;
}
}
return (rc);
}
/*-------------------------------------------------------
* Get a user-friendly print version of a bitmap word (uint64),
* i.e. bytes are printed according to host endianness.
* e.g. 31 becomes '00 00 00 00 00 00 00 1f'.
* The length of the word is always 24 (including ending '\0').
* ------------------------------------------------------
*/
static char*
GetBitmapWord(BM_HRL_WORD *word)
{
char *wordtext;
char *ptr;
char *ret;
int off;
ptr = (char*)word;
wordtext = malloc(24);
ret = wordtext;
/* Be aware of endianness */
if (htonl(42) == 42)
{
/* Big Endian */
for (off = 0; off <= 7; off++)
{
if (off > 0)
*wordtext++ = ' ';
sprintf(wordtext, "%02x", *(ptr + off) & 0xff);
wordtext += 2;
}
}
else
{
/* Little Endian */
for (off = 7; off >= 0; off--)
{
if (off < 7)
*wordtext++ = ' ';
sprintf(wordtext, "%02x", *(ptr + off) & 0xff);
wordtext += 2;
}
}
return ret;
}
/* Given the index into the parameter list, convert and return the
* current string to a number if possible */
static int
GetOptionValue(char *optionString)
{
unsigned int x;
int value = -1;
int optionStringLength = strlen(optionString);
/* Verify the next option looks like a number */
for (x = 0; x < optionStringLength; x++)
if (!isdigit((int) optionString[x]))
break;
/* Convert the string to a number if it looks good */
if (x == optionStringLength)
value = atoi(optionString);
return (value);
}
/* Read the page header off of block 0 to determine the block size
* used in this file. Can be overridden using the -S option. The
* returned value is the block size of block 0 on disk */
unsigned int
GetBlockSize(FILE *fp)
{
unsigned int localSize = 0;
int bytesRead = 0;
char localCache[sizeof(PageHeaderData)];
/* Read the first header off of block 0 to determine the block size */
bytesRead = fread(&localCache, 1, sizeof(PageHeaderData), fp);
rewind(fp);
if (bytesRead == sizeof(PageHeaderData))
localSize = (unsigned int) PageGetPageSize(&localCache);
else
{
printf("Error: Unable to read full page header from block 0.\n"
" ===> Read %u bytes\n", bytesRead);
exitCode = 1;
}
if (localSize == 0)
{
printf("Notice: Block size determined from reading block 0 is zero, using default %d instead.\n", BLCKSZ);
printf("Hint: Use -S <size> to specify the size manually.\n");
localSize = BLCKSZ;
}
return (localSize);
}
/* Determine the contents of the special section on the block and
* return this enum value */
static unsigned int
GetSpecialSectionType(char *buffer, Page page)
{
unsigned int rc;
unsigned int specialOffset;
unsigned int specialSize;
unsigned int specialValue;
PageHeader pageHeader = (PageHeader) page;
/* If this is not a partial header, check the validity of the
* special section offset and contents */
if (bytesToFormat > sizeof(PageHeaderData))
{
specialOffset = (unsigned int) pageHeader->pd_special;
/* Check that the special offset can remain on the block or
* the partial block */
if ((specialOffset == 0) ||
(specialOffset > blockSize) || (specialOffset > bytesToFormat))
rc = SPEC_SECT_ERROR_BOUNDARY;
else
{
/* we may need to examine last 2 bytes of page to identify index */
uint16 *ptype = (uint16 *) (buffer + blockSize - sizeof(uint16));
specialSize = blockSize - specialOffset;
/* If there is a special section, use its size to guess its
* contents, checking the last 2 bytes of the page in cases
* that are ambiguous. Note we don't attempt to dereference
* the pointers without checking bytesToFormat == blockSize. */
if (specialSize == 0)
rc = SPEC_SECT_NONE;
else if (specialSize == MAXALIGN(sizeof(uint32)))
{
/* If MAXALIGN is 8, this could be either a sequence or
* SP-GiST or GIN. */
if (bytesToFormat == blockSize)
{
specialValue = *((int *) (buffer + specialOffset));
if (specialValue == SEQUENCE_MAGIC)
rc = SPEC_SECT_SEQUENCE;
else if (specialSize == MAXALIGN(sizeof(SpGistPageOpaqueData)) &&
*ptype == SPGIST_PAGE_ID)
rc = SPEC_SECT_INDEX_SPGIST;
else if (specialSize == MAXALIGN(sizeof(GinPageOpaqueData)))