golang: how to check if a write fails due to insufficient disk space

Question

If a go program return error with Write(), it returns something like this:

write failed(*fs.PathError): write mnt/test.dat: no space left on device

Is there anyway other than string matching for 'no space left on device', to know that a PathError is due to insufficient disk space?

Note: I am using Linux, and not caring about how it works on Windows.

related: [Get amount of free disk space](https://stackoverflow.com/q/20108520/10197418) — FObersteiner, Nov 15 '21 at 09:31

score 1 · Accepted Answer · answered Nov 15 '21 at 16:19

Yes, it may be sensitive to the OS you compile for but you can check if the error wraps syscall.ENOSPC.

_, err := file.Write(stuff)
if err != nil {
    if errors.Is(err, syscall.ENOSPC) {
        // There was no space left on the device
        return "get more space"
    }
    // something else is wrong
}

score 0 · Answer 2 · answered Nov 15 '21 at 07:46

0

Is there anyway other than string matching for 'no space left on device', to know that a PathError is due to insufficient disk space?

No.

answered Nov 15 '21 at 07:46

Volker

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The accepted answer works on linux! – xrfang Nov 16 '21 at 01:16
2

@xrfang Package syscall is not covered by the Go compatibility promise. If this type of hack is good enough for you now and in the future this is fine. – Volker Nov 16 '21 at 06:47

golang: how to check if a write fails due to insufficient disk space

2 Answers2