zmwangx/Finder busy xattr.md

Last active April 13, 2023 18:27

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When a file is being copied in on macOS, the com.apple.FinderInfo xattr is set to the 32-byte value

627a7920 00000000 00000000 00000000 00000000 00000000 00000000 00000000

which would show up as bzy with xattr -p com.apple.FinderInfo /path/to/file. (This may only be true when there are no additional attributes likes flags.) This can be used to test whether a file copy has completed.

Conversely, one can also use

xattr -wx com.apple.FinderInfo '627a7920 00000000 00000000 00000000 00000000 00000000 00000000 00000000' /path/to/file

to emulate the in-progress visual when writing a file.

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