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This is really a head scratcher...

I'm running Node 22.9.0 on a raspberry PI (Linux raspberrypi 6.1.21-v8+)

My script, which is run as root, can write a new file in the current directory and update that file just fine.

total 332 drwxr-xr-x 11 root root 4096 Feb 8 06:37 . drwxr-xr-x 4 root root 4096 Dec 20 07:24 .. ..... -rw-r--r-- 1 root root 1861 Feb 8 06:37 database.json (THE FILE)

I have a event loop in the script that runs inside of setInterval. Inside that event loop, I receive the following error when trying to write to the file...

Error! Error: EACCES: permission denied, open 'database.json'

It seems that inside the loop, I lose access to the directory...

setInterval(() => { console.log(process.env.USER) // root fs.access("./database.json", fs.constants.W_OK, (err) => { if (err) { // am seeing this log!! console.error('Directory is not writable'); } }); }, 2000);

Any ideas why I can write outside of setInterval, but not inside of setInterval?

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  • You are attempting to access a file in the current directory of the callback process. Commented Feb 8 at 13:17
  • Yep that is correct! Is that… bad? Commented Feb 8 at 15:02
  • ./database.json is a relative path, what if you put an absolute path ie /root/database.json Commented Feb 16 at 23:40
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