It is of course also possible to do the directory check first and create the directory if not already existing. The user can see now the error message output by command MD if the directory structure could not be created explaining briefly the reason. Windows command interpreter executes this command implicit on leaving execution of the batch file.
For understanding the used commands and how they work, open a command prompt window, execute there the following commands, and read entirely all help pages displayed for each command very carefully.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Create folder in batch script and ignore if it exists Ask Question. Asked 4 years, 6 months ago. Active 8 months ago.
Viewed 44k times. Improve this question. An error occurs if the final path component already exists, or if any component is a file instead of a directory. But I strongly don't want to have an error if final path component already exists.
Add a comment. If yes, the file will be opened in the program notepad. If you cannot or do not want to write all commands into one line, you can also use the following syntax:. Additionally, I have worked with a variable in this example.
Please note: The contributions published on askingbox. They are not verified by independents and do not necessarily reflect the opinion of askingbox. Windows batch is a programming language, check if the file exists is a programming task. Appears on topic. Should be closed as dupicate of How to test if a file is a directory in a batch script? Add a comment.
Active Oldest Votes. For a file: if exist yourfilename echo Yes else echo No Replace yourfilename with the name of your file.
Improve this answer. Community Bot 1 1 1 silver badge. The second part of your answer is incomplete. See the update at stackoverflow. AlexanderGelbukh It works without the quotes. Of course, this limits you when it comes to having spaces in the directory path. Yes, without quotes it works. That seems to distinguish between files and directories correctly, but there is a weakness in that if the file is not detected, creation of the directory will fail.
I suspect this is a problem with testing for NUL , too. About your last sentence, I suspect something is wrong with your batch file elsewhere. Martin Schapendonk Martin Schapendonk It's also nice and generic and can be applied to every other action you want to conditionally do : — John Humphreys.
The article has some extremely convoluted information about what drive formats this works for and doesn't. Actually, although this answer is great, it does not answer to the question to "create a directory" : — Jean-Francois T. Show 5 more comments. Community Bot 1 1 1 silver badge. Calling something "perfectly valid" when it violates best practices is intellectually dishonest.
As another example: When somebody asks you how to avoid a certain specific security problem, your answer shouldn't be "run the computer as an administrator" even if the question didn't explicitly specify minimum security impact as a prerequisite. Nothing wrong with Errorlevel or errno. They are platform-specific error messaging paradigms, and they work for the purpose they have been built for.
But no matter what the platform or messaging approach is, I wouldn't recommend the "try to do this and recover if it fails" pattern when you can easily avoid - and thus legibly document - the common error case.
Hence, I do find the "if not exists"-style approaches superior. But, I don't want or care to go too deep into a debate about the formation of best practices. I had no intention of offending anyone, just wanted to clarify my downvote.
The problem with simply ignoring the error is that you don't know why it failed. It could have failed because the directory already existed, because the user doesn't have permissions on that directory, because the parent path didn't exist, or because the disk failed. This answer results in an error in all cases, though.
That's why it's unsuitable for a batch script. Show 4 more comments. Is there a way to make this work in PowerShell? It doesn't seem to support NUL as an output file.
0コメント