java.io.IOException: Permission denied cannot create file in Linux

Question

I am trying to create a temporary file under /opt/ie/var/tmp in linux, the permission for /opt/ie/var/tmp is drwxr-xr-x. I got java.io.IOException: Permission denied cannot create file when creating, below is my code:

File uploadedFile = File.createTempFile(prefix, suffix, new File("/opt/ie/var/tmp"));

Is there any way I can set sudo when creating the temp file in Java? Thanks.

How are you logged in? Are you the owner of the tmp folder 'cause that's the only user with permission to write there. — nicomp
– nicomp, Commented Aug 28, 2020 at 19:46

Febtober · Accepted Answer · 2020-08-28 20:04:37Z

1

You are using a shared tmp directory, so I think the proper thing to do is to give it a proper permission:

chmod 1777 /opt/ie/var/tmp

P.S. I got 1777/drwxrwxrwt using stat /tmp from a Linux Mint system. The t is restricted deletion flag or sticky bit (t).

answered Aug 28, 2020 at 20:04

Febtober

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Saurabh Nigam · Accepted Answer · 2020-08-28 19:41:11Z

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You can run your java application from root user, then it should be able to create the file.

answered Aug 28, 2020 at 19:41

Saurabh Nigam

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1 Comment

nicomp Over a year ago

Expanding on this answer, assuming root owns the folder, then only root has permission to write a file there.

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