Another question on bind mounts without mtab
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I've had another question come up about bind mounts and the lack of mtab and I'm not sure how to answer it because it does seem a more important use case that has been lost than those previously discussed.
If /dev/sda1 is mounted in /, and you bind mount /home/foo to /mnt, then there is no way to tell from the output of mount that it is in fact, the /home/foo directory of /dev/sda1 that is in /mnt. It looks like you just bind mounted the whole drive there, and the subdirectory path is lost.
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Karel Zak
maintainerQuoted 7 lines · Phillip Susi
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Hash: SHA1I've had another question come up about bind mounts and the lack of mtab and I'm not sure how to answer it because it does seem a more important use case that has been lost than those previously discussed.
Quoted 5 lines
If
/dev/sda1is mounted in /, and you bind mount/home/footo /mnt, then there is no way to tell from the output of mount that it is in fact, the/home/foodirectory of/dev/sda1that is in /mnt. It looks like you just bind mounted the whole drive there, and the subdirectory path is lost.
See findmnt output, the /proc/self/mountinfo contains info about the mounted filesystem directory (usually '/', but /home/foo in your example).
Note that I'd like to learn people to use findmnt(8) rather mount output. The mount(8) output is there mostly for backward compatibility.
Karel
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Karel Zak <[email protected]> http://karelzak.blogspot.com