find if under one filesystem other filesystems are mounted

[Dennis Handly · Accepted solution]

You may want to do a better job matching

awk -v FSYS="/filesystem" '
BEGIN {found=0}
$2 == FSYS || $2 ~ ("^" FSYS "/") {
   found += 1
   print $0
}
END { print found }' /etc/mnttab

[support_billa]

great , you improve my awk so perfect that i have following idea :

when i have  following filesystem(s)

/filesystem
/filesystem/fs1
/filesystem/fs2

and i want to umount /filesystem , so i have to search for :

/filesystem/fs1
/filesystem/fs2

with

awk -v FSYS="/filesystem" '
BEGIN {found=0}
$2 ~ ("^" FSYS "/") {
   found += 1
   print $0
}
END { print found }' /etc/mnttab

Spoiler