Commit 8746ef72 authored by Yaroslav Sidlovsky's avatar Yaroslav Sidlovsky 💬
Browse files

Fix smartctl exit status success check

According to the smartctl man page:
The  exit  statuses of smartctl are defined by a bitmask.  If all is well with the disk, the exit status (return value) of smartctl is 0 (all bits turned off).  If a problem occurs, or an error, potential error, or fault is detected, then a non-zero status is
returned.  In this case, the eight different bits in the exit status have the following meanings for ATA disks; some of these values may also be returned for SCSI disks.

Bit 0: Command line did not parse.

Bit 1: Device open failed, device did not return an IDENTIFY DEVICE structure, or device is in a low-power mode (see '-n' option above).

Bit 2: Some SMART or other ATA command to the disk failed, or there was a checksum error in a SMART data structure (see '-b' option above).

Bit 3: SMART status check returned "DISK FAILING".

Bit 4: We found prefail Attributes <= threshold.

Bit 5: SMART status check returned "DISK OK" but we found that some (usage or prefail) Attributes have been <= threshold at some time in the past.

Bit 6: The device error log contains records of errors.

Bit 7: The device self-test log contains records of errors.  [ATA only] Failed self-tests outdated by a newer successful extended self-test are ignored.

BUG: 429028
parent ad354606
......@@ -117,7 +117,11 @@ void SmartParser::loadSmartOutput()
if (m_SmartOutput.isEmpty()) {
ExternalCommand smartctl(QStringLiteral("smartctl"), { QStringLiteral("--all"), QStringLiteral("--json"), devicePath() });
if ( && smartctl.exitCode() == 0) {
// Exit status of smartctl is a bitfield, check that bits 0 and 1 are not set:
// - bit 0: command line did not parse;
// - bit 1: device open failed.
// See `man 8 smartctl` for more details.
if ( && (smartctl.exitCode() & 1) == 0 && (smartctl.exitCode() & 2) == 0) {
QByteArray output = smartctl.rawOutput();
m_SmartOutput = QJsonDocument::fromJson(output);
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