pistar-functions

# Common script functions for Pi-Star routines:
#   meant to be paired in a given routine: first write mode check, then read mode check;
#   one pair for root rw/ro, one pair for root+boot rw/ro;
#   valid for routines in Buster, Bullseye, Bookworm;
#   designed so that a routine retains the read/write state entering and exiting.

function mount-rw() {
   fs=$(sed -n "s|/dev/.* / ext4 \(r[ow]\).*|\1|p" /proc/mounts)
   if [ "$fs" == "ro" ]; then
     sudo mount -o remount,rw /
   fi
}

function mount-ro() {
#  fs=$(sed -n "s|/dev/.* / ext4 \(r[ow]\).*|\1|p" /proc/mounts)
   if [ "$fs" == "ro" ]; then
     sudo mount -o remount,ro /
   fi
}

function mount-rw-boot() {
   fs=$(sed -n "s|/dev/.* / ext4 \(r[ow]\).*|\1|p" /proc/mounts)
   fw=$(sed -n "s|/dev/.*/boot\(.*\) [ve].*|\1|p"  /proc/mounts)
   if [ "$fs" == "ro" ]; then
     sudo mount -o remount,rw /
     sudo mount -o remount,rw /boot${fw}
   fi
}

function mount-ro-boot() {
#  fs=$(sed -n "s|/dev/.* / ext4 \(r[ow]\).*|\1|p" /proc/mounts)
#  fw=$(sed -n "s|/dev/.*/boot\(.*\) [ve].*|\1|p"  /proc/mounts)
   if [ "$fs" == "ro" ]; then
     sudo mount -o remount,ro /
     sudo mount -o remount,ro /boot${fw}
   fi
}

function set-fs-fw() {
   fs=$(sed -n "s|/dev/.* / ext4 \(r[ow]\).*|\1|p" /proc/mounts)
   fw=$(sed -n "s|/dev/.*/boot\(.*\) [ve].*|\1|p"  /proc/mounts)
}