121 lines
3.2 KiB
Bash
Executable File
121 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
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# -------------------------------------------------------------------------- #
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# Copyright 2002-2023, OpenNebula Project, OpenNebula Systems #
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# #
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# Licensed under the Apache License, Version 2.0 (the "License"); you may #
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# not use this file except in compliance with the License. You may obtain #
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# a copy of the License at #
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# #
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# http://www.apache.org/licenses/LICENSE-2.0 #
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# #
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# Unless required by applicable law or agreed to in writing, software #
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# distributed under the License is distributed on an "AS IS" BASIS, #
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. #
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# See the License for the specific language governing permissions and #
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# limitations under the License. #
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#--------------------------------------------------------------------------- #
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set -e
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CMD=$(basename ${0})
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# file path to the new qemu-kvm symlink
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QEMU_ONE="/usr/bin/qemu-kvm-one"
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#
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# functions
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#
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print_usage()
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{
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cat <<EOF
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NAME:
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${CMD} - System agnostic QEMU/KVM symlink generator
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It will try to find a qemu-kvm binary in the system from a list of known
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paths and if successful - it will create a proper symlink:
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'${QEMU_ONE}'
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USAGE:
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${CMD} [-f|--force]
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Find the system QEMU binary and create the symlink
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-f|--force: This option will overwrite existing symlink or file
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${CMD} -h|--help
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Print this help
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EOF
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}
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#
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# main
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#
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FORCE_CREATE=
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case "$1" in
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'')
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:
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;;
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-h|--help)
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print_usage
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exit 0
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;;
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-f|--force)
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FORCE_CREATE=yes
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;;
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*)
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echo "ERROR: ${CMD}: Unknown option '${1}' !" >&2
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print_usage >&2
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exit 1
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;;
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esac
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# find cpu arch or default to x86_64
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if command -v arch >/dev/null 2>&1 ; then
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ARCH=$(arch)
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else
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ARCH="x86_64"
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fi
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# verify that symlink is not already created
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if [ -L "${QEMU_ONE}" ] ; then
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# symlink already exists
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qemu_target=$(readlink "${QEMU_ONE}")
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if [ -e "${qemu_target}" ] && [ -z "${FORCE_CREATE}" ] ; then
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# symlink is valid
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exit 0
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fi
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elif [ -e "${QEMU_ONE}" ] ; then
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# there is a file of the same name and it is not a symlink
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if [ -z "${FORCE_CREATE}" ] ; then
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echo "ERROR: ${CMD}: File '${QEMU_ONE}' already exists but it is not a symlink !" >&2
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exit 1
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else
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# --force is used
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rm -f "${QEMU_ONE}"
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fi
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fi
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# search the known paths for qemu binary
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#
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# NOTE: you can add new supported paths here in the future
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for QEMU_BIN in \
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/usr/libexec/qemu-kvm \
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/usr/bin/qemu-kvm \
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/usr/bin/qemu-system-${ARCH} \
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;
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do
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if [ -e "${QEMU_BIN}" ] ; then
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ln -s ${FORCE_CREATE:+-f} "${QEMU_BIN}" "${QEMU_ONE}"
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exit 0
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fi
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done
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# no qemu binary found -> we signal error and exit
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echo "ERROR: ${CMD}: No qemu kvm binary found !" >&2
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exit 1
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