#!/bin/bash
mnt='/dev/md0 on / type ext4 (rw,relatime,barrier,data=ordered)
none on /dev type devtmpfs (rw,nosuid,noexec,relatime,size=2983576k,nr_inodes=745894,mode=755)
none on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
none on /proc type proc (rw,nosuid,nodev,noexec,relatime)
none on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
/tmp on /tmp type tmpfs (rw,relatime)
/run on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
/dev/shm on /dev/shm type tmpfs (rw,nosuid,nodev,relatime)
none on /sys/fs/cgroup type tmpfs (rw,relatime,size=4k,mode=755)
cgmfs on /run/cgmanager/fs type tmpfs (rw,relatime,size=100k,mode=755)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,relatime,cpuset,release_agent=/run/cgmanager/agents/cgm-release-agent.cpuset,clone_children)
cgroup on /sys/fs/cgroup/cpu type cgroup (rw,relatime,cpu,release_agent=/run/cgmanager/agents/cgm-release-agent.cpu)
cgroup on /sys/fs/cgroup/cpuacct type cgroup (rw,relatime,cpuacct,release_agent=/run/cgmanager/agents/cgm-release-agent.cpuacct)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,relatime,blkio,release_agent=/run/cgmanager/agents/cgm-release-agent.blkio)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,relatime,memory,release_agent=/run/cgmanager/agents/cgm-release-agent.memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,relatime,devices,release_agent=/run/cgmanager/agents/cgm-release-agent.devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer,release_agent=/run/cgmanager/agents/cgm-release-agent.freezer)
none on /proc/bus/usb type devtmpfs (rw,nosuid,noexec,relatime,size=2983576k,nr_inodes=745894,mode=755)
none on /sys/kernel/debug type debugfs (rw,relatime)
securityfs on /sys/kernel/security type securityfs (rw,relatime)
/dev/md2 on /volume1 type btrfs (rw,relatime,ssd,synoacl,space_cache=v2,auto_reclaim_space,metadata_ratio=50,subvolid=257,subvol=/@syno)
none on /config type configfs (rw,relatime)
/dev/sdu2 on /volumeUSB1/usbshare1-2 type fuseblk.ntfs (rw,relatime,user_id=0,group_id=0,default_permissions,allow_other,blksize=4096)'

awk '$3 ~ /^\/volumeUSB1\//{print $3;exit}' <<< "$mnt"
sed -n 's/.*\(\/volumeUSB1\/[^ ]*\).*/\1/p' <<< "$mnt"
grep -o -m1 '\/volumeUSB1\/[^ ]*' <<< "$mnt"