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#!/bin/bash
# Created By: srdusr
# Created On: Wed 02 Aug 2023 16:16:21 PM CAT
# Project: QEMU setup/opener helper wrapper script
# Set global variables for VM parameters
ram_size="4G"
# Function to prompt user for VM parameters
function get_vm_parameters() {
read -p "Enter VM name (default: vm): " vm_name
vm_name=${vm_name:-vm}
# Set the default ISO file path to ~/machines/images
default_iso_path="$HOME/machines/images"
# Generate completions for ISO and IMG files in the images directory
COMPREPLY=()
local files=$(compgen -G "$default_iso_path/*.{iso,img}" -o plusdirs)
for file in $files; do
COMPREPLY+=("$file")
done
# Use read with -i and -e options for tab-completion
read -ep "Enter ISO file path (default: $default_iso_path): " -i "$default_iso_path" iso_path
# Manually expand the ~ to the user's home directory
iso_path=$(eval echo "$iso_path")
# Validate the user input
while [ ! -f "$iso_path" ]; do
read -ep "Invalid file path. Enter a valid ISO file path: " iso_path
done
# Check if the selected file is an IMG file
if [[ "$iso_path" == *.img ]]; then
guest_os="windows"
else
guest_os="linux"
fi
# Show available disk space before asking for disk image size
echo "Available disk space:"
df -h "$vm_images_path"
read -p "Enter disk image size in GB (default: 10G): " disk_size
disk_size=${disk_size:-10G}
read -p "Enter RAM size in GB (default: 4G): " ram_size
ram_size=${ram_size:-4G}
# Check if the RAM size is in the correct format (e.g., "4G")
while ! [[ $ram_size =~ ^[0-9]+[kKmMgGtTpPeE]$ ]]; do
read -p "Invalid RAM size format. Enter RAM size in GB (e.g., 4G): " ram_size
done
read -p "Enter number of CPU cores (default: 2): " cpu_cores
cpu_cores=${cpu_cores:-2}
}
# Function to list available VMs
function list_vms() {
echo "Available VMs:"
for vm_file in "$vm_images_path"/*.qcow2; do
vm=$(basename "$vm_file" .qcow2)
echo " - $vm"
done
}
# Function to list available ISO and IMG files in the images directory
function list_iso_img_files() {
echo "Available ISO and IMG files in $iso_images_path:"
iso_img_files=()
while IFS= read -r -d $'\0' file; do
iso_img_files+=("$file")
done < <(find "$iso_images_path" -type f \( -iname \*.iso -o -iname \*.img \) -print0)
for ((i = 0; i < ${#iso_img_files[@]}; i++)); do
echo " $((i + 1)). ${iso_img_files[i]##*/}"
done
}
# Function to check if VM is already running
function is_vm_running() {
vm_name=$1
if ps aux | grep -v grep | grep -q "[q]emu-system-x86_64.*$vm_name"; then
return 0
else
return 1
fi
}
# Function to start VM
function start_vm() {
vm_name=$1
is_vm_running "$vm_name"
if [ $? -eq 0 ]; then
echo "VM '$vm_name' is already running."
return
fi
# VM parameters
qemu_cmd="qemu-system-x86_64 -enable-kvm -machine type=q35 -m $ram_size -cpu host -smp 2 -vga virtio"
qemu_cmd+=" -device qemu-xhci -device usb-tablet -device usb-kbd -device virtio-net,netdev=user0 -netdev user,id=user0,hostfwd=tcp::5555-:22"
qemu_cmd+=" -cdrom \"$iso_path\" -drive file=\"$vm_images_path/$vm_name.qcow2\",index=0,media=disk,if=virtio"
if [[ $guest_os == "windows" ]]; then
qemu_cmd+=" -drive file=\"$iso_images_path/virtio-win.iso\",index=3,media=cdrom"
fi
qemu_cmd+=" -boot menu=on"
qemu_cmd+=" -net nic -net user,hostname=$vm_name -name \"$vm_name\""
echo "Starting VM: $vm_name"
eval "$qemu_cmd"
}
# Main script starts here
vm_images_path="$HOME/machines/vm"
iso_images_path="$HOME/machines/images"
# Check if directories exist
mkdir -p "$vm_images_path"
mkdir -p "$iso_images_path"
# List available VMs
list_vms
# List available ISO and IMG files in the images directory
list_iso_img_files
# Ask the user if they want to use an existing VM or create a new one
read -p "Do you want to use an existing VM? (y/n): " use_existing_vm
if [[ $use_existing_vm =~ ^[Yy]$ ]]; then
read -p "Enter the name of the existing VM: " existing_vm_name
while [ ! -f "$vm_images_path/$existing_vm_name.qcow2" ]; do
echo "VM '$existing_vm_name' does not exist."
read -p "Enter a valid existing VM name: " existing_vm_name
done
vm_name=$existing_vm_name
else
# Prompt user for VM parameters
get_vm_parameters
# Check if VM already exists
if [ -f "$vm_images_path/$vm_name.qcow2" ]; then
read -p "VM '$vm_name' already exists. Do you want to start it? (y/n): " start_vm_choice
if [[ $start_vm_choice =~ ^[Yy]$ ]]; then
start_vm "$vm_name"
exit 0
fi
else
# Create new VM
echo "Creating new VM: $vm_name"
qemu-img create -f qcow2 "$vm_images_path/$vm_name.qcow2" "$disk_size"
start_vm "$vm_name"
exit 0
fi
fi
# If an existing VM is selected, ask if the user wants to modify its parameters
read -p "Do you want to modify the VM parameters? (y/n): " modify_vm_params
if [[ $modify_vm_params =~ ^[Yy]$ ]]; then
get_vm_parameters
fi
# Start the VM
start_vm "$vm_name"
echo "Script execution completed."
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