libvirt-backup/bc.sh at main · aashipov/libvirt-backup · GitHub

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#!/bin/sh

# ------------------------------------------------------------
#  bc.sh – Live‑disk backup for libvirt VMs
# ------------------------------------------------------------

# ------------------------------------------------------------
# Script/base dir
# ------------------------------------------------------------
get_base_dir() {
    if [ -f "${0}" ]
    then
        # $0 points to a file on disk
        printf '%s\n' "$(cd -- "$(dirname -- "${0}")" && pwd -P)"
    else
        # The script was sourced in a shell where $0 is not the script path
        # Fallback to the current working directory
        printf '%s\n' "$(pwd -P)"
    fi
}

# ------------------------------------------------------------
#  Main function to prevent occasional environment pollution
# ------------------------------------------------------------
closure() {
    #set -x # debug

    # Define BASE_DIR
    BASE_DIR="$(get_base_dir)"
    # Load library
    LIB_SH="${BASE_DIR}/lib.sh"
    if [ ! -e "${LIB_SH}" ]
    then
        printf "${LIB_SH} does not exist, exiting\n"
        exit 1
    fi
    # shellcheck source=lib.sh
    if ! . "${LIB_SH}"
    then
        printf "Could not load ${LIB_SH}, exiting\n"
        exit 1
    fi
    unset LIB_SH

    # Do the job
    environment

    create_backup_dirs_and_log
    check_running
    create_running

    # Cleanup on interrupt
    trap cleanup_on_exit INT TERM HUP QUIT
    # Release the lock on normal exit
    trap rm_running EXIT

    create_current_backup_dir
    clean_obsolete_backups
    export_vm_and_disk_configuration
    check_available_disk_space
    backup_vms
    validate_backups
}

closure