disk full during FileWriteLine

[corz]

If I am writing to a log file and free space runs out during the operation, AutoIt just keeps on going. FileWriteLine(handle) carries on as if there were space to write when there is not, returning true, no @error, nothing. If I use FileFlush(handle) every hundreds lines or so, it also always returns true.

So how can I tell that the disk is full during the writing (aside from continually checking DriveSpaceFree())?

I'm missing something obvious, right?

;o) Cor

[careca]

I'd go for the DriveSpaceFree route, doesn't seem like FileWriteLine was written taking into account the free space, even tho, it states:

"Failure if file not opened in writemode, file is read only, or file cannot otherwise be written to."

But the thing is that it starts writing, maybe it only fails if it can't start.

Edited July 18, 2014 by careca

[corz]

That's just the thing; when the file is initially opened, there is plenty space. It is during the writing that space runs out.

This certainly quacks like a bug!

;o) Cor

[careca]

Can we see the code to try to reproduce? maybe strip out what you don't want us to see..

[wisem2540]

You could use AdlibRegister and write a function that checks drive space and IF its too full, then exit.  I know you said you didnt want to do that, but Adlib would make it fairly simple.

Adlib will run the function however often you need.

[corz]

haha! thanks, but it's not my first rodeo!

If you really want some code to reproduce this error (bug), the simplest of routines will do it, something like..

; Drive M: has 44KB space left
$handle = FileOpen("M:\some.file", 2)

; This should produce a file about twice that length..
for $i = 1 to 9999
    $written = FileWriteLine($handle, StringFormat('%05d',$i))
    if not $written then ConsoleWrite("ERROR " & "->" & @error & @LF)
next
; you will not see an error message!

FileCLose($handle)
exit

I love AdLib, and use it a fair bit, but in this sort of scenario, it would probably be smarter to use mod() to check every "so often" lines.

At any rate, I already coded in a work-around as it's possible, in my app at least, to know roughly how big the file will be before even opening it, so I check then.

I just thought I must be missing something as FileWriteLine() keeps on going as if it were working fine when it clearly is not. Looks like a bug in AutoIt.

;o) Cor

Edited July 18, 2014 by corz

[Exit]

What happens if you Change

if not $written then ConsoleWrite("ERROR " & "->" & @error & @LF)

to

if (not $written) or @error then ConsoleWrite("ERROR " & "->" & @error & @LF)

[corz]

What happens is, the entire logical programming paradigm falls apart!

I'm not about to start testing for @error after a function returns true "just in case" it actually didn't!

At any rate, when it comes to FileWriteLine(), there is no @error, no returning false, nada!

;o) Cor

[BrewManNH]

If I were you I'd go here and post a bug report about this, I tested this on a thumb drive on my computer and it's not working as expected. When the drive is full, FileWriteLine keeps saying it has written the line, when it clearly hasn't and can't. I checked to make sure, and it's not even overwriting the last line of the file with new data.

[corz]

Yeah, I'll do that. Cheers BrewManNH

;o) Cor