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fix error handling

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This commit is contained in:
Hendrik Schutter
2026-04-26 21:55:35 +02:00
parent e086241615
commit 5e50c5f489
1 changed files with 274 additions and 63 deletions
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337
src/shred.cpp
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@ -29,16 +29,20 @@ Shred::~Shred()
/**
* \brief shred drive with shred
* \param pointer of Drive instance
* \return void
* \param pointer of Drive instance
* \param file descriptor for signaling
* \return 0 on success, -1 on error
*/
int Shred::shredDrive(Drive *drive, int *ipSignalFd)
{
ostringstream address;
address << (void const *)&(*drive);
Logger::logThis()->info("Shred-Task started - Drive: " + drive->getModelName() + "-" + drive->getSerial() + " @" + address.str());
drive->bWasShredStarted = true; // Mark drive as partly shredded
// Mark as started but NOT shredded yet
drive->bWasShredStarted = true;
drive->bWasShredded = false;
drive->bWasChecked = false;
drive->setTaskPercentage(0.0);
drive->u32DriveChecksumAfterShredding = UINT32_MAX;
drive->state = Drive::TaskState::SHRED_ACTIVE;
@ -46,53 +50,136 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
#ifdef DRYRUN
for (int i = 0; i <= 100; i++)
{
drive->setTaskPercentage(i + 0.05);
if (drive->state.load() != Drive::TaskState::SHRED_ACTIVE)
{
Logger::logThis()->info("Shred-Task aborted during DRYRUN - Drive: " + drive->getSerial());
drive->setTaskPercentage(i + 0.05);
drive->state = Drive::TaskState::NONE;
drive->bWasShredded = false; // CRITICAL: Mark as NOT shredded on abort
return -1;
}
drive->setTaskPercentage((double)i);
write(*ipSignalFd, "A", 1);
usleep(20000);
}
// Only mark as shredded if DRYRUN completed successfully
drive->bWasShredded = true;
drive->setTaskPercentage(0.0);
drive->state = Drive::TaskState::NONE;
Logger::logThis()->info("DRYRUN completed - Drive: " + drive->getSerial());
return 0;
#endif
#ifndef DRYRUN
const char *cpDrivePath = drive->getPath().c_str();
unsigned char ucKey[TFNG_KEY_SIZE];
// open random source
// Open random source
Logger::logThis()->info("Shred-Task: Opening random source: " + string(randomsrc) + " - Drive: " + drive->getSerial());
randomSrcFileDiscr = open(randomsrc, O_RDONLY | O_LARGEFILE);
if (randomSrcFileDiscr == -1)
{
std::string errorMsg(strerror(errno));
Logger::logThis()->error("Shred-Task: Open random source failed! " + errorMsg + " - Drive: " + drive->getSerial());
perror(randomsrc);
cleanup();
int savedErrno = errno;
Logger::logThis()->error("Shred-Task: Open random source failed! Path: " + string(randomsrc) +
" - Error: " + strerror(savedErrno) + " (errno: " + to_string(savedErrno) + ")" +
" - Drive: " + drive->getSerial());
// Reset drive state on error - NOT shredded
drive->state = Drive::TaskState::NONE;
drive->setTaskPercentage(0.0);
drive->bWasShredStarted = false;
drive->bWasShredded = false;
return -1;
}
Logger::logThis()->info("Shred-Task: Random source opened successfully (fd: " + to_string(randomSrcFileDiscr) + ") - Drive: " + drive->getSerial());
// open disk
// Open disk
driveFileDiscr = open(cpDrivePath, O_RDWR | O_LARGEFILE);
if (driveFileDiscr == -1)
{
std::string errorMsg(strerror(errno));
Logger::logThis()->error("Shred-Task: Open drive failed! " + errorMsg + " - Drive: " + drive->getSerial());
perror(cpDrivePath);
cleanup();
int savedErrno = errno;
string errorDetail;
switch (savedErrno)
{
case ENOMEDIUM:
errorDetail = "No medium found (drive may be empty or disconnected)";
break;
case EACCES:
errorDetail = "Permission denied (need root/sudo?)";
break;
case ENOENT:
errorDetail = "Drive not found (device may have been removed)";
break;
case EROFS:
errorDetail = "Read-only file system";
break;
case EBUSY:
errorDetail = "Drive is busy (may be mounted or in use)";
break;
case EINVAL:
errorDetail = "Invalid argument";
break;
default:
errorDetail = strerror(savedErrno);
break;
}
Logger::logThis()->error("Shred-Task: Open drive failed! Path: " + string(cpDrivePath) +
" - Error: " + errorDetail + " (errno: " + to_string(savedErrno) + ")" +
" - Drive: " + drive->getSerial() + " - Model: " + drive->getModelName());
// Close random source before returning
close(randomSrcFileDiscr);
randomSrcFileDiscr = -1;
// Reset drive state on error - NOT shredded
drive->state = Drive::TaskState::NONE;
drive->setTaskPercentage(0.0);
drive->bWasShredStarted = false;
drive->bWasShredded = false;
return -1;
}
Logger::logThis()->info("Shred-Task: Drive opened successfully (fd: " + to_string(driveFileDiscr) + ") - Drive: " + drive->getSerial());
// read key for random generator
// Read key for random generator
Logger::logThis()->info("Shred-Task: Reading random key - Drive: " + drive->getSerial());
ssize_t readRet = read(randomSrcFileDiscr, ucKey, sizeof(ucKey));
if (readRet <= 0)
{
std::string errorMsg(strerror(errno));
Logger::logThis()->error("Shred-Task: Read random key failed! " + errorMsg + " - Drive: " + drive->getSerial());
perror(randomsrc);
int savedErrno = errno;
Logger::logThis()->error("Shred-Task: Read random key failed! Expected: " + to_string(sizeof(ucKey)) +
" bytes, Got: " + to_string(readRet) + " bytes" +
" - Error: " + strerror(savedErrno) + " (errno: " + to_string(savedErrno) + ")" +
" - Drive: " + drive->getSerial());
cleanup();
// Reset drive state on error - NOT shredded
drive->state = Drive::TaskState::NONE;
drive->setTaskPercentage(0.0);
drive->bWasShredStarted = false;
drive->bWasShredded = false;
return -1;
}
Logger::logThis()->info("Shred-Task: Random key read successfully (" + to_string(readRet) + " bytes) - Drive: " + drive->getSerial());
tfng_prng_seedkey(ucKey);
this->ulDriveByteSize = getDriveSizeInBytes(driveFileDiscr);
if (this->ulDriveByteSize == 0)
{
Logger::logThis()->error("Shred-Task: Drive size is 0 bytes! Drive may be empty or size detection failed - Drive: " + drive->getSerial());
cleanup();
// Reset drive state on error - NOT shredded
drive->state = Drive::TaskState::NONE;
drive->setTaskPercentage(0.0);
drive->bWasShredStarted = false;
drive->bWasShredded = false;
return -1;
}
Drive::ShredSpeed shredSpeed = drive->sShredSpeed.load();
shredSpeed.chronoShredTimestamp = std::chrono::system_clock::now(); // set inital timestamp for speed metric
shredSpeed.ulSpeedMetricBytesWritten = 0U; // uses to calculate speed metric
@ -102,9 +189,12 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
Logger::logThis()->info("Shred-Task: Bytes-Size of Drive: " + to_string(this->ulDriveByteSize) + " - Drive: " + drive->getSerial());
#endif
// Main shredding loop
for (unsigned int uiShredIterationCounter = 0U; uiShredIterationCounter < SHRED_ITERATIONS; uiShredIterationCounter++)
{
unsigned long ulDriveByteCounter = 0U; // used for one shred-iteration to keep track of the current drive position
// Logger::logThis()->info("Shred-Task: Starting iteration " + to_string(uiShredIterationCounter + 1) + "/" + to_string(SHRED_ITERATIONS) + " - Drive: " + drive->getSerial());
unsigned long ulDriveByteCounter = 0U;
if (uiShredIterationCounter == (SHRED_ITERATIONS - 1))
{
@ -114,11 +204,29 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
while (ulDriveByteCounter < ulDriveByteSize)
{
int iBytesToShred = 0; // Bytes that will be overwritten in this chunk-iteration
// Check if task was aborted
if (drive->state.load() != Drive::TaskState::SHRED_ACTIVE)
{
Logger::logThis()->info("Shred-Task: Aborted by user at " + to_string(d32Percent) +
"% in iteration " + to_string(uiShredIterationCounter + 1) +
" - Drive: " + drive->getSerial());
drive->setTaskPercentage(0);
d32Percent = 0.00;
d32TmpPercent = 0.00;
cleanup();
// CRITICAL: Mark as NOT shredded on abort
drive->state = Drive::TaskState::NONE;
drive->bWasShredded = false;
drive->bWasChecked = false;
return -1;
}
int iBytesToShred = 0;
if (uiShredIterationCounter != (SHRED_ITERATIONS - 1))
{
// NOT last shred iteration --> generate new random data
// Generate random data for this chunk
tfng_prng_genrandom(caTfngData, TFNG_DATA_SIZE);
}
@ -135,10 +243,20 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
if (iByteShredded <= 0)
{
std::string errorMsg(strerror(errno));
Logger::logThis()->error("Shred-Task: Write to drive failed! " + errorMsg + " - Drive: " + drive->getSerial());
perror("unable to write random data");
int savedErrno = errno;
Logger::logThis()->error("Shred-Task: Write to drive failed! Attempted: " + to_string(iBytesToShred) +
" bytes, Written: " + to_string(iByteShredded) + " bytes" +
" - Position: " + to_string(ulDriveByteCounter) + "/" + to_string(ulDriveByteSize) +
" - Iteration: " + to_string(uiShredIterationCounter + 1) + "/" + to_string(SHRED_ITERATIONS) +
" - Error: " + strerror(savedErrno) + " (errno: " + to_string(savedErrno) + ")" +
" - Drive: " + drive->getSerial());
cleanup();
// CRITICAL: Mark as NOT shredded on write failure
drive->state = Drive::TaskState::NONE;
drive->setTaskPercentage(0.0);
drive->bWasShredded = false;
drive->bWasChecked = false;
return -1;
}
@ -150,7 +268,10 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
ulDriveByteOverallCount += iByteShredded;
d32Percent = this->calcProgress();
#ifdef LOG_LEVEL_HIGH
Logger::logThis()->info("Shred-Task: ByteCount: " + to_string(ulDriveByteCounter) + " - iteration: " + to_string((uiShredIterationCounter + 1)) + " - progress: " + to_string(d32Percent) + " - Drive: " + drive->getSerial());
Logger::logThis()->info("Shred-Task: ByteCount: " + to_string(ulDriveByteCounter) +
" - iteration: " + to_string((uiShredIterationCounter + 1)) +
" - progress: " + to_string(d32Percent) + "%" +
" - Drive: " + drive->getSerial());
#endif
if ((d32Percent - d32TmpPercent) >= 0.01)
@ -158,36 +279,37 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
// set shred percantage
drive->setTaskPercentage(d32TmpPercent);
d32TmpPercent = d32Percent;
// signal process in shreding
// signal process in shredding
write(*ipSignalFd, "A", 1);
}
if (drive->state != Drive::TaskState::SHRED_ACTIVE)
{
drive->setTaskPercentage(0);
d32Percent = 0.00;
d32TmpPercent = 0.00;
ulDriveByteCounter = 0U;
Logger::logThis()->info("Aborted shred for: " + drive->getModelName() + "-" + drive->getSerial());
cleanup();
return -1;
}
// end one chunk write
}
Logger::logThis()->info("Shred-Task: Iteration " + to_string(uiShredIterationCounter + 1) + "/" +
to_string(SHRED_ITERATIONS) + " completed - Drive: " + drive->getSerial());
// Rewind drive for next iteration
if (0 != iRewindDrive(driveFileDiscr))
{
Logger::logThis()->error("Shred-Task: Unable to rewind drive! - Drive: " + drive->getSerial());
Logger::logThis()->error("Shred-Task: Unable to rewind drive after iteration " +
to_string(uiShredIterationCounter + 1) + " - Drive: " + drive->getSerial());
cleanup();
// CRITICAL: Mark as NOT shredded on rewind failure
drive->state = Drive::TaskState::NONE;
drive->setTaskPercentage(0.0);
drive->bWasShredded = false;
drive->bWasChecked = false;
return -1;
}
// end one shred iteration
}
// end of all shred iteratio
tfng_prng_seedkey(NULL); // reset random generator
// All shred iterations completed successfully
tfng_prng_seedkey(NULL);
// ONLY mark as shredded if ALL iterations completed AND fsync succeeded
drive->bWasShredded = true;
Logger::logThis()->info("Shred-Task finished - Drive: " + drive->getModelName() + "-" + drive->getSerial() + " @" + address.str());
Logger::logThis()->info("Shred-Task finished successfully - Drive: " + drive->getModelName() + "-" + drive->getSerial() + " @" + address.str());
#ifdef ZERO_CHECK
drive->state = Drive::TaskState::CHECK_ACTIVE;
Logger::logThis()->info("Check-Task started - Drive: " + drive->getModelName() + "-" + drive->getSerial() + " @" + address.str());
@ -196,33 +318,49 @@ int Shred::shredDrive(Drive *drive, int *ipSignalFd)
if (drive->u32DriveChecksumAfterShredding != 0)
{
drive->state = Drive::TaskState::CHECK_FAILED;
Logger::logThis()->info("Shred-Task: Checksum not zero: " + to_string(drive->u32DriveChecksumAfterShredding) + " - Drive: " + drive->getSerial());
Logger::logThis()->error("Check-Task: Checksum verification failed! Expected: 0, Got: " +
to_string(drive->u32DriveChecksumAfterShredding) + " - Drive: " + drive->getSerial());
}
else
{
drive->state = Drive::TaskState::CHECK_SUCCESSFUL;
Logger::logThis()->info("Shred-Task: Checksum zero: " + to_string(drive->u32DriveChecksumAfterShredding) + " - Drive: " + drive->getSerial());
drive->bWasChecked = true;
Logger::logThis()->info("Check-Task: Checksum verification passed (zero) - Drive: " + drive->getSerial());
}
#endif
cleanup();
#endif
if ((drive->state.load() == Drive::TaskState::SHRED_ACTIVE) || (drive->state.load() == Drive::TaskState::CHECK_SUCCESSFUL) || (drive->state == Drive::TaskState::CHECK_FAILED))
// Final state handling - ONLY process if shred actually completed
Drive::TaskState finalState = drive->state.load();
// Only do final processing if we reached a completion state
// (not if we returned early with errors)
if ((finalState == Drive::TaskState::SHRED_ACTIVE) ||
(finalState == Drive::TaskState::CHECK_SUCCESSFUL) ||
(finalState == Drive::TaskState::CHECK_FAILED))
{
if (drive->state != Drive::TaskState::CHECK_FAILED)
if (finalState != Drive::TaskState::CHECK_FAILED)
{
Logger::logThis()->info("Shred-Task: Triggering print for drive - Drive: " + drive->getSerial());
Printer::getPrinter()->print(drive);
}
else
{
Logger::logThis()->warning("Shred-Task: Skipping print due to checksum failure - Drive: " + drive->getSerial());
}
drive->state = Drive::TaskState::NONE;
drive->setTaskPercentage(0.0);
Logger::logThis()->info("Finished shred/check for: " + drive->getModelName() + "-" + drive->getSerial());
Logger::logThis()->info("Completed shred/check for: " + drive->getModelName() + "-" + drive->getSerial());
}
return 0;
}
/**
* \brief calc shredding progress in %
* \param current byte index of the drive
* \param current shred iteration
* \return double percentage
*/
double Shred::calcProgress()
@ -232,54 +370,95 @@ double Shred::calcProgress()
#ifdef ZERO_CHECK
uiMaxShredIteration++; // increment because we will check after SHRED_ITERATIONS the drive for non-zero bytes
#endif
if (this->ulDriveByteSize == 0)
return 0.0;
return (double)(((double)ulDriveByteOverallCount) / ((double)this->ulDriveByteSize * uiMaxShredIteration)) * 100.0f;
return (double)(((double)ulDriveByteOverallCount) / ((double)this->ulDriveByteSize * uiMaxShredIteration)) * 100.0;
}
/**
* \brief rewind drive to beginning
* \param file descriptor
* \return 0 on success, -1 on error
*/
int Shred::iRewindDrive(fileDescriptor file)
{
if (0 != lseek(file, 0L, SEEK_SET))
off_t result = lseek(file, 0L, SEEK_SET);
if (result == -1)
{
perror("unable to rewind drive");
Logger::logThis()->info("Unable to rewind drive! - fileDescriptor: " + to_string(file));
int savedErrno = errno;
Logger::logThis()->error("Unable to rewind drive! Error: " + string(strerror(savedErrno)) +
" (errno: " + to_string(savedErrno) + ") - fileDescriptor: " + to_string(file));
return -1;
}
else
else if (result != 0)
{
return 0;
Logger::logThis()->error("Rewind position mismatch! Expected: 0, Got: " + to_string(result) +
" - fileDescriptor: " + to_string(file));
return -1;
}
return 0;
}
/**
* \brief get drive size in bytes
* \param file descriptor
* \return size in bytes, 0 on error
*/
long Shred::getDriveSizeInBytes(fileDescriptor file)
{
long liDriveSizeTmp = lseek(file, 0L, SEEK_END);
off_t liDriveSizeTmp = lseek(file, 0L, SEEK_END);
if (liDriveSizeTmp == -1)
{
perror("unable to get drive size");
Logger::logThis()->info("Unable to get drive size! - fileDescriptor: " + to_string(file));
int savedErrno = errno;
Logger::logThis()->error("Unable to get drive size! Error: " + string(strerror(savedErrno)) +
" (errno: " + to_string(savedErrno) + ") - fileDescriptor: " + to_string(file));
return 0L;
}
if (0 != iRewindDrive(file))
{
liDriveSizeTmp = 0L;
Logger::logThis()->error("Unable to rewind after size detection - fileDescriptor: " + to_string(file));
return 0L;
}
#ifdef DEMO_DRIVE_SIZE
liDriveSizeTmp = DEMO_DRIVE_SIZE;
Logger::logThis()->info("DEMO_DRIVE_SIZE active - using size: " + to_string(liDriveSizeTmp) + " bytes");
#endif
return liDriveSizeTmp;
}
/**
* \brief calculate checksum of drive (verify all zeros)
* \param file descriptor
* \param pointer to Drive instance
* \param signal file descriptor
* \return checksum value (0 = all zeros)
*/
unsigned int Shred::uiCalcChecksum(fileDescriptor file, Drive *drive, int *ipSignalFd)
{
unsigned int uiChecksum = 0;
unsigned long ulDriveByteCounter = 0U;
Logger::logThis()->info("Check-Task: Starting checksum verification - Drive: " + drive->getSerial());
while (ulDriveByteCounter < ulDriveByteSize)
{
// Check if task was aborted
if (drive->state.load() != Drive::TaskState::CHECK_ACTIVE)
{
Logger::logThis()->info("Check-Task: Aborted by user at " + to_string(d32Percent) + "% - Drive: " + drive->getSerial());
return UINT32_MAX; // Return non-zero to indicate incomplete check
}
int iBytesToCheck = 0;
if ((ulDriveByteSize - ulDriveByteCounter) < CHUNK_SIZE)
{
iBytesToCheck = (ulDriveByteSize - ulDriveByteCounter);
@ -289,6 +468,18 @@ unsigned int Shred::uiCalcChecksum(fileDescriptor file, Drive *drive, int *ipSig
iBytesToCheck = CHUNK_SIZE;
}
int iReadBytes = read(file, caReadBuffer, iBytesToCheck);
if (iReadBytes <= 0)
{
int savedErrno = errno;
Logger::logThis()->error("Check-Task: Read failed! Attempted: " + to_string(iBytesToCheck) +
" bytes, Read: " + to_string(iReadBytes) + " bytes" +
" - Position: " + to_string(ulDriveByteCounter) + "/" + to_string(ulDriveByteSize) +
" - Error: " + strerror(savedErrno) + " (errno: " + to_string(savedErrno) + ")" +
" - Drive: " + drive->getSerial());
return UINT32_MAX; // Return non-zero to indicate read failure
}
for (int iReadBytesCounter = 0U; iReadBytesCounter < iReadBytes; iReadBytesCounter++)
{
uiChecksum += caReadBuffer[iReadBytesCounter];
@ -301,7 +492,10 @@ unsigned int Shred::uiCalcChecksum(fileDescriptor file, Drive *drive, int *ipSig
drive->sShredSpeed.store(shredSpeed);
#ifdef LOG_LEVEL_HIGH
Logger::logThis()->info("Shred-Task (Checksum): ByteCount: " + to_string(ulDriveByteCounter) + " - progress: " + to_string(d32Percent) + " - Drive: " + drive->getSerial());
Logger::logThis()->info("Check-Task: ByteCount: " + to_string(ulDriveByteCounter) +
" - progress: " + to_string(d32Percent) + "%" +
" - checksum so far: " + to_string(uiChecksum) +
" - Drive: " + drive->getSerial());
#endif
if (((d32Percent - d32TmpPercent) >= 0.01) || (d32Percent == 100.0))
@ -314,12 +508,29 @@ unsigned int Shred::uiCalcChecksum(fileDescriptor file, Drive *drive, int *ipSig
write(*ipSignalFd, "A", 1);
}
}
Logger::logThis()->info("Check-Task: Verification complete - Final checksum: " + to_string(uiChecksum) + " - Drive: " + drive->getSerial());
drive->bWasChecked = true;
return uiChecksum;
}
/**
* \brief cleanup - close file descriptors
*/
void Shred::cleanup()
{
close(driveFileDiscr);
close(randomSrcFileDiscr);
if (driveFileDiscr != -1)
{
Logger::logThis()->info("Shred-Task: Closing drive file descriptor: " + to_string(driveFileDiscr));
close(driveFileDiscr);
driveFileDiscr = -1;
}
if (randomSrcFileDiscr != -1)
{
Logger::logThis()->info("Shred-Task: Closing random source file descriptor: " + to_string(randomSrcFileDiscr));
close(randomSrcFileDiscr);
randomSrcFileDiscr = -1;
}
}