CODEWITHSUNDEEP
perlshellfilesystemsnfs
Alex
Alex

Reputation: 2746

How can I tell if a file is on a remote filesystem with Perl?

Is there a quick-and-dirty way to tell programmatically, in shell script or in Perl, whether a path is located on a remote filesystem (nfs or the like) or a local one? Or is the only way to do this to parse /etc/fstab and check the filesystem type?

Upvotes: 11

Views: 3908

Answers (5)

Vagnerr
Vagnerr

Reputation: 3007

I have tested the following on solaris7,8,9 & 10 and it seems to be reliable

/bin/df -g <filename> | tail -2 | head -1 | awk '{print $1}'

Should give you have the fs type rather than trying to match for a "host:path" in your mount point.

Upvotes: 1

Svante
Svante

Reputation: 51561

If you use df on a directory to get info only of the device it resides in, e.g. for the current directory:

df .

Then, you can just parse the output, e.g.

df . | tail -1 | awk '{print $1}'

to get the device name.

Upvotes: 2

Leon Timmermans
Leon Timmermans

Reputation: 30245

On some systems, the device number is negative for NFS files. Thus,

print "remote" if (stat($filename))[0] < 0

Upvotes: 0

Chris Dodd
Chris Dodd

Reputation: 2958

stat -f -c %T <filename> should do what you want. You might also want -l

Upvotes: 13

Steve Baker
Steve Baker

Reputation: 4373

You can use "df -T" to get the filesystem type for the directory, or use the -t option to limit reporting to specific types (like nfs) and if it comes back with "no file systems processed", then it's not one of the ones you're looking for.

df -T $dir | tail -1 | awk '{print $2;}'

Upvotes: 2

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