Chrootmnt: A Bash script to mount and unmount /dev inside a chroot environment.

chrootmnt.sh

#!/usr/bin/env bash

# ------------------------------------------------------------------
# Script Name:   chrootmnt.sh
# Description:   A Bash script to mount and unmount /dev 
#                inside a chroot environment
# Website:       https://gist.github.com/ostechnix
# Version:       1.0
# Usage:         ./chrootmnt.sh /path/to/chroot command args
# ------------------------------------------------------------------

# Validate input
if [ $# -lt 2 ]; then
  echo "Usage: $0 /path/to/chroot command [args...]"
  exit 1
fi

# Path to the chroot directory
CHROOT_DIR="$1"
shift  # Remove the first argument (chroot path)

# Ensure the chroot directory exists
if [ ! -d "$CHROOT_DIR" ]; then
  echo "Error: Chroot directory $CHROOT_DIR does not exist."
  exit 1
fi

# Mount /dev and /dev/pts
sudo mount --bind /dev "$CHROOT_DIR/dev"
sudo mount --bind /dev/pts "$CHROOT_DIR/dev/pts"

# Handle unmounting on exit
cleanup() {
  sudo umount "$CHROOT_DIR/dev/pts"
  sudo umount "$CHROOT_DIR/dev"
}
trap cleanup EXIT

# Enter the chroot
sudo chroot "$CHROOT_DIR" "$@"