In a shell script, I need to determine the device for a file, subsequent use with diskutil, eg...
# ??? Assign device to FileDevice, based on full path.
diskutil info $FileDevice
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How does this relate to your other question?– nohillside ♦Commented Mar 23, 2020 at 15:58
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My functional need changed a little since that one; now it's to determine the type of volume, not just if it's APFS or not.– Paul HolmesCommented Mar 23, 2020 at 17:56
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1@nohillside Here's my combined solution: Returns file system personality for a file: diskutil info $(df $filepath | sed -n 2p | cut -d ' ' -f 1) | grep '^ File System Personality:*' | sed 's/ File System Personality: (.*)$/\1/'– Paul HolmesCommented Mar 23, 2020 at 18:05
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2 Answers
df /path/to/file | sed -n 2p | cut -d ' ' -f 1
will give you the device the file is on. To combine this directly with diskutil info use
diskutil info $(df /path/to/file | sed -n 2p | cut -d ' ' -f 1)
answered Mar 23, 2020 at 15:57
The easiest way to determine the device that contains a file is to use df. For example:
$ df /Users/mj/bin/imgls
Filesystem 1K-blocks Used Available Capacity iused ifree %iused Mounted on
/dev/disk1s1 488347692 418217076 38565452 92% 3141515 9223372036851634292 0% /
You can use cut if you just want the device (I used tail as a crude way to remove the df header).
$ df /Users/mj/bin/imgls | tail -1 | cut -d ' ' -f 1
/dev/disk1s1
