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Well, I appreciate you replying.
But...
Randor wrote: 1.) You are using some invalid/reserved characters in your path. The < and > are reserved characters.
1. My path doesn't actually contain any < or > That was just for you to replace. You know, Microsoft docs use < > to denote variable values, that's what I was doing.
I was saying add your <username> directory into the path so it will run on your machine.
\\?\c:\users\<username>\temp\superlongfilenameand1234567890thisoneisgoingintherecordbooks1234567890andwillprobablytoastthisentire1234567890thingandiwonderwhatitisgoing1234567890todowhenilookatthefiletest1234567890ThisIsGoingToGoOnForALongLongLongLongLongTimeIthink123456789012345678901234567890123456789012345678901234567890_2017_03_10_2.txt Note: that's really all one line but this editor makes it look odd.
Randor wrote: 2.) You are incorrectly assuming that you can make a really long directory entry of 32,767 characters.
2. No, the path already exists on my computer. That's a temp path that was created long ago. That's why I use that same path to create the other file (shorter name) which successfully calls CreateFileW.
Randor wrote: 3.) You are mistakenly attempting to create directories with the CreateFile Function[^]
3. again, no the path is already created.
If I do not provide any path in the string then it will create the file in the EXE path of my executable so I'm just pointing it to a path that already exists.
Finally, I actually am following those rules. Do you have any other ideas?
Thanks
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Hi,
I gave you absolutely all the information needed to create a path greater than MAX_PATH (260). Everything in my prior analysis is correct.
You seem extremely argumentative and/or having trouble understanding me.
Let me be specific:
raddevus wrote: Finally, I actually am following those rules. Do you have any other ideas?
No, you are not. Look again:
1.) Individual path components such as file names and directory names should be <= 255 characters. (This is probably why your code fails.)
2.) The entire path can be up to 32,767 wide characters.
The filename: superlongfilenameand1234567890thisoneisgoingintherecordbooks1234567890andwillprobablytoastthisentire1234567890thingandiwonderwhatitisgoing1234567890todowhenilookatthefiletest1234567890ThisIsGoingToGoOnForALongLongLongLongLongTimeIthink123456789012345678901234567890123456789012345678901234567890_2017_03_10_2.txt
This filename 312 characters length which is greater than 255 characters. Refer to what I said in rule 1.
Best Wishes,
-David Delaune
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Sheesh.
I'm an engineer. You wanted me to be exact and I was exact in my language and so I was.
I honestly wasn't being argumentative. I was being precise. I was enjoying our discussion.
Keep in mind that you started this entire conversation and your introduction with the following:
Randor wrote: Wow, you wrote a disk monitoring application but did not know about NTFS filename limits? How is that even possible? Are you a .NET coder or something?
That was argumentative and not a fantastic introduction.
You also set up the original problem like the following:
Randor wrote: You could always create files longer than MAX_PATH ... even on Windows NT 4 all you do is prefix them with the "\\?\"
Plus read the exact wording on lpFileName (not path) at the Microsoft docs:
Quote: lpFileName [in]
The name of the file or device to be created or opened. You may use either forward slashes (/) or backslashes (\) in this name.
In the ANSI version of this function, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "\\?\" to the path.
The Focus Seemed to Be On FileName -- not filename + path
This all set my thinking-context so I was thought, "Hey, I can create files that are 32,767 chars long. Let's do it!!"
That's why I've been focusing on CreateFileW. I will add CreateDirectoryW() now and work with that.
Alas, this is path + filename. 
Surely, you can see how confusing this has been.
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raddevus wrote: Plus read the exact wording on lpFileName (not path) at the Microsoft docs:Quote: lpFileName [in]The name of the file or device to be created or opened. You may use either forward slashes (/) or backslashes (\) in this name.In the ANSI version of this function, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "\\?\" to the path.
I can see why this is unclear. Keep in mind that you can use CreateFile to open COM ports and various other devices. It can also be used to open files on storage devices. This is why it is important to train yourself to never pay any attention to any variable names.
Looks like the engineer decided to name that variable lpFileName when the variable is actually [drive][path][filename] or [IO device].
Even in Windows... Everything is a File[^].
Best Wishes,
-David Delaune
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Randor wrote: I can see why this is unclear. Keep in mind that you can use CreateFile to open COM ports and various other devices.
Thanks and yes I got stuck in a thinking-track and couldn't move out of it.
I have successfully used CreateDirectoryW and CreateFileW now to create extremely long file paths / names.
It all works great.
\\?\C:\Users\<username>\temp\12345678901234567890\12345678901234567890\12345678901234567890\12345678901234567890\12345678901234567890\12345678901234567890\12345678901234567890\12345678901234567890\12345678901234567890\12345678901234567890\abcdefghijklmnopqrstuvwxzy1234abcdefghijklmnopqrstuv\X_abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234_X\Y_abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234abcdefghijklmnopqrstuvwxyz1234_Y/superlongfilenamean12henilookatthefiletest1234567890ThisIsGoingToGoOnForALongLongLongLongLongTimeIthink1234567890123456789012superlongfilenamean12henilookatthefiletest1234567890ThisIsGoingToGoOnForALongLon345678901234567890123456789012345_2017_03_10_3.txt
It's still odd though because Explorer and the console can barely handle these files.
I was surprised to see that I could double-click the file from Explorer and windows notepad came up and let me edit it. Explorer won't let me copy the path out though -- ends up using the tilde names like:
C:\Users\ROGER~1.DEU\temp\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\ABCDEF~1\X_ABCD~1\Y_ABCD~1
Thanks for all your help. I think this was a good discussion.
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raddevus wrote: Explorer won't let me copy the path out though -- ends up using the tilde names like:
C:\Users\ROGER~1.DEU\temp\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\123456~1\ABCDEF~1\X_ABCD~1\Y_ABCD~1
That is for backwards compatibility with DOS and FAT partitions... 8.3 short names[^]. That feature can be disabled:
How to disable 8.3 file name creation on NTFS partitions.[^]
You can also pass that 8.3 short name to the GetLongPathName function[^] and get the full path.
Best Wishes,
-David Delaune
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I want someone to suggest an air supply I can use to automate a slide whistle.
Fish tank air pumps do not produce enough air flow. I'm trying to stay away from anything that requires an air tank and anything that's louder than a slide whistle. I tried a 5v 120mm ducted blower fan with a 3d printed nozzle on it and I was suprised that didn't do it.
Suggestions?
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Happy birthday!
I'd start by measuring the airflow and pressure you need - until you know that, you're just whistling in the dark...
(But I'd probably use a tanked solution with a pressure sensitive top-up motor and a regulator. If noise is a problem, you can move the tank and pump well away from the whistle if you use big enough bore tubing.)
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Thanks Griff.
Best I can figure from my research, musical instruments with a fipple (mouthpiece with a block or channel in them) require 1 PSI or less. A trumpet operates at up to 3 PSI, and the most that a stupendous human being can produce is 5 or 6 PSI.
The problem is mostly in volume.
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How about mechanised bellows? A pair of small bellows arranged in an one-up-one-down, couple of return springs and a cammed motor should do it.
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Interesting concept. I'll have to see what I can do with a single manual bellow and see if this is feasible. Also I like that using a bellow gives me a way to put numbers on what sort of air flow I require. Thanks again.
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They're not cheap, but I once used my CPAP machine to inflate a queen-sized air mattress in less than 2 minutes - and they are very quiet.
Cheers,
Mick
------------------------------------------------
It doesn't matter how often or hard you fall on your arse, eventually you'll roll over and land on your feet.
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That's actually pretty funny. But wow, expensive.
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I've just had to replace my old one - nothing wrong with the mechanism, just one of the silicone seals where the humidifier attaches split, and Fisher & Paykel no longer carry spare parts (model was discontinued about 5 years ago). If you were local, I could let you try it and/or have it cheap. Cost me over $1000 just for some split silicone, which was bloody annoying.
Cheers,
Mick
------------------------------------------------
It doesn't matter how often or hard you fall on your arse, eventually you'll roll over and land on your feet.
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Compressed air can? (Of the sort used for airbrush painting). It would probably need a restricting valve to reduce air flow, and of course when it's gone it's gone. But a simple press on the nozzle starts airflow and there's no mechanical noise.
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Interesting. I didn't even know these existed. I would still prefer something with limitless on-demand air supply but this could be worth trying if there's a reasonable way to switch the supply on and off with an Arduino.
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Just don't throw your birthday balloons away.
I wanna be a eunuchs developer! Pass me a bread knife!
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How about your local MP/Congresscritter? 
I see only three problems:
- They tend to leak
- Turning them off is a bit of a problem
- You can't control them from an Arduino
If you have an important point to make, don't try to be subtle or clever. Use a pile driver. Hit the point once. Then come back and hit it again. Then hit it a third time - a tremendous whack.
--Winston Churchill
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Back in my country, roadside cycle shops use old refrigerator compressors to inflate tires. They're fairly quiet but the flow rate may not be enough for your purpose
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Buying a small child from a third-world country not an option? 
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I can't find anything about how to actuate a child with an Arduino.
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<Reply type="Obligatory" style="crude:medium;color:off;">
- just change your diet to one containing more beans and cabbage.
- purchase a pet and affix it to it's distal vent, feed diet from previous suggestion
</Reply>
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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Limitless supply of hot air...hmm. Sounds like you just need a politician! 
..on a more serious note, how about steam?
"Go forth into the source" - Neal Morse
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Mick's CPAP comment gave me an idea. Air bed inflater. I have a 12v one, but they do come in mains versions.
Cheers,
Peter
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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