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Overview
| Comment: | Enhance the showdb utility program so that it can read the last partial page of a truncated database file. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
61d72e17916bc043ce53c64e5ba7050a |
| User & Date: | drh 2015-04-15 15:29:05 |
Context
|
2015-04-15
| ||
| 17:26 | Prevent the fetchPayload() routine from reporting a cell size that extends off the end of the page on a pathologically corrupted database file. (check-in: f71053cf user: drh tags: trunk) | |
| 15:29 | Enhance the showdb utility program so that it can read the last partial page of a truncated database file. (check-in: 61d72e17 user: drh tags: trunk) | |
| 14:52 | Add the --msvc command-line option to the releasetest.tcl script. This is only a partial merge from the winTest branch as the OS_TRACE changes are omitted. (check-in: b8768f12 user: drh tags: trunk) | |
Changes
Changes to tool/showdb.c.
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** Read content from the file.
**
** Space to hold the content is obtained from malloc() and needs to be
** freed by the caller.
*/
static unsigned char *getContent(int ofst, int nByte){
unsigned char *aData;
aData = malloc(nByte+32);
if( aData==0 ) out_of_memory();
memset(aData, 0, nByte+32);
lseek(db, ofst, SEEK_SET);
if( read(db, aData, nByte)<nByte ) memset(aData, 0, nByte);
return aData;
}
/*
** Print a range of bytes as hex and as ascii.
*/
static unsigned char *print_byte_range(
................................................................................
zPgSz[1] = 0;
lseek(db, 16, SEEK_SET);
if( read(db, zPgSz, 2)<2 ) memset(zPgSz, 0, 2);
pagesize = zPgSz[0]*256 + zPgSz[1]*65536;
if( pagesize==0 ) pagesize = 1024;
printf("Pagesize: %d\n", pagesize);
fstat(db, &sbuf);
mxPage = sbuf.st_size/pagesize;
printf("Available pages: 1..%d\n", mxPage);
if( argc==2 ){
int i;
for(i=1; i<=mxPage; i++) print_page(i);
}else{
int i;
for(i=2; i<argc; i++){
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** Read content from the file.
**
** Space to hold the content is obtained from malloc() and needs to be
** freed by the caller.
*/
static unsigned char *getContent(int ofst, int nByte){
unsigned char *aData;
int got;
aData = malloc(nByte+32);
if( aData==0 ) out_of_memory();
memset(aData, 0, nByte+32);
lseek(db, ofst, SEEK_SET);
got = read(db, aData, nByte);
if( got>0 && got<nByte ) memset(aData+got, 0, nByte-got);
return aData;
}
/*
** Print a range of bytes as hex and as ascii.
*/
static unsigned char *print_byte_range(
................................................................................
zPgSz[1] = 0;
lseek(db, 16, SEEK_SET);
if( read(db, zPgSz, 2)<2 ) memset(zPgSz, 0, 2);
pagesize = zPgSz[0]*256 + zPgSz[1]*65536;
if( pagesize==0 ) pagesize = 1024;
printf("Pagesize: %d\n", pagesize);
fstat(db, &sbuf);
mxPage = (sbuf.st_size+pagesize-1)/pagesize;
printf("Available pages: 1..%d\n", mxPage);
if( argc==2 ){
int i;
for(i=1; i<=mxPage; i++) print_page(i);
}else{
int i;
for(i=2; i<argc; i++){
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