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Fix an assertion failure when the disk fills up. Add tests for a full

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disk situation. (CVS 285)

FossilOrigin-Name: 0a7848b6190981cb7eb673bbe68cb217694daf2e
This commit is contained in:
drh
2001-10-12 17:30:04 +00:00
parent 4299020922
commit 81a20f21d5
16 changed files with 232 additions and 49 deletions
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29
src/os.c
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@@ -11,7 +11,7 @@
******************************************************************************
**
** This file contains code that is specific to particular operating
** systems. The purpose of this file is to provide a uniform abstract
** systems. The purpose of this file is to provide a uniform abstraction
** on which the rest of SQLite can operate.
*/
#include "sqliteInt.h"
@@ -158,6 +158,23 @@ static void releaseLockInfo(struct lockInfo *pInfo){
}
#endif /** POSIX advisory lock work-around **/
/*
** If we compile with the SQLITE_TEST macro set, then the following block
** of code will give us the ability to simulate a disk I/O error. This
** is used for testing the I/O recovery logic.
*/
#ifdef SQLITE_TEST
int sqlite_io_error_pending = 0;
#define SimulateIOError(A) \
if( sqlite_io_error_pending ) \
if( sqlite_io_error_pending-- == 1 ){ local_ioerr(); return A; }
static void local_ioerr(){
sqlite_io_error_pending = 0; /* Really just a place to set a breakpoint */
}
#else
#define SimulateIOError(A)
#endif
/*
** Delete the named file
@@ -248,7 +265,7 @@ int sqliteOsOpenReadWrite(
NULL
);
if( h==INVALID_HANDLE_VALUE ){
HANDLE h = CreateFile(zFilename,
h = CreateFile(zFilename,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
@@ -443,12 +460,14 @@ int sqliteOsClose(OsFile id){
int sqliteOsRead(OsFile id, void *pBuf, int amt){
#if OS_UNIX
int got;
SimulateIOError(SQLITE_IOERR);
got = read(id.fd, pBuf, amt);
if( got<0 ) got = 0;
return got==amt ? SQLITE_OK : SQLITE_IOERR;
#endif
#if OS_WIN
DWORD got;
SimulateIOError(SQLITE_IOERR);
if( !ReadFile(id, pBuf, amt, &got, 0) ){
got = 0;
}
@@ -463,12 +482,14 @@ int sqliteOsRead(OsFile id, void *pBuf, int amt){
int sqliteOsWrite(OsFile id, const void *pBuf, int amt){
#if OS_UNIX
int wrote;
SimulateIOError(SQLITE_IOERR);
wrote = write(id.fd, pBuf, amt);
if( wrote<amt ) return SQLITE_FULL;
return SQLITE_OK;
#endif
#if OS_WIN
DWORD wrote;
SimulateIOError(SQLITE_IOERR);
if( !WriteFile(id, pBuf, amt, &wrote, 0) || wrote<amt ){
return SQLITE_FULL;
}
@@ -494,6 +515,7 @@ int sqliteOsSeek(OsFile id, int offset){
** Make sure all writes to a particular file are committed to disk.
*/
int sqliteOsSync(OsFile id){
SimulateIOError(SQLITE_IOERR);
#if OS_UNIX
return fsync(id.fd)==0 ? SQLITE_OK : SQLITE_IOERR;
#endif
@@ -506,6 +528,7 @@ int sqliteOsSync(OsFile id){
** Truncate an open file to a specified size
*/
int sqliteOsTruncate(OsFile id, int nByte){
SimulateIOError(SQLITE_IOERR);
#if OS_UNIX
return ftruncate(id.fd, nByte)==0 ? SQLITE_OK : SQLITE_IOERR;
#endif
@@ -522,6 +545,7 @@ int sqliteOsTruncate(OsFile id, int nByte){
int sqliteOsFileSize(OsFile id, int *pSize){
#if OS_UNIX
struct stat buf;
SimulateIOError(SQLITE_IOERR);
if( fstat(id.fd, &buf)!=0 ){
return SQLITE_IOERR;
}
@@ -529,6 +553,7 @@ int sqliteOsFileSize(OsFile id, int *pSize){
return SQLITE_OK;
#endif
#if OS_WIN
SimulateIOError(SQLITE_IOERR);
*pSize = GetFileSize(id, 0);
return SQLITE_OK;
#endif