235 lines
6.7 KiB
Bash
Executable File
235 lines
6.7 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-3.0-only
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#
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# This file is part of the distrobox project:
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# https://github.com/89luca89/distrobox
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#
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# Copyright (C) 2022 distrobox contributors
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#
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# distrobox is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 3
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# as published by the Free Software Foundation.
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#
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# distrobox is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with distrobox; if not, see <http://www.gnu.org/licenses/>.
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# Ensure we have our env variables correctly set
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[ -z "${USER}" ] && USER="$(id -run)"
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[ -z "${HOME}" ] && HOME="$(getent passwd "${USER}" | cut -d':' -f6)"
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[ -z "${SHELL}" ] && SHELL="$(getent passwd "${USER}" | cut -d':' -f7)"
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# Defaults
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host_command=""
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non_interactive=0
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# If we're in a non-interactive shell, let's act accordingly
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if [ ! -t 1 ] ||
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! tty > /dev/null 2>&1; then
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non_interactive=1
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fi
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distrobox_host_exec_default_command="${SHELL:-/bin/sh}"
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host_spawn_version="v1.6.0"
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download_command=""
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sudo_command=""
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verbose=0
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version="1.8.2.2"
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# show_help will print usage to stdout.
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# Arguments:
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# None
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# Expected global variables:
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# version: distrobox version
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# Expected env variables:
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# None
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# Outputs:
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# print usage with examples.
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show_help()
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{
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cat << EOF
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distrobox version: ${version}
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Usage:
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distrobox-host-exec [command [arguments]]
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distrobox-host-exec ls
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distrobox-host-exec bash -l
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distrobox-host-exec flatpak run org.mozilla.firefox
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distrobox-host-exec podman ps -a
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Options:
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--help/-h: show this message
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--verbose/-v: show more verbosity
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--version/-V: show version
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--yes/-Y: Automatically answer yes to prompt:
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host-spawn will be installed on the guest system
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if host-spawn is not detected.
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This behaviour is default when running in a non-interactive shell.
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EOF
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}
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# If we're a symlink to a command, use that as command to exec, and skip arg parsing.
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if [ "$(basename "${0}")" != "distrobox-host-exec" ]; then
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host_command="$(basename "${0}")"
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fi
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# Parse arguments
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if [ -z "${host_command}" ]; then
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# Skip argument parsing if we're a symlink
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while :; do
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case $1 in
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-h | --help)
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# Call a "show_help" function to display a synopsis, then exit.
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show_help
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exit 0
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;;
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-v | --verbose)
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verbose=1
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shift
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;;
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-V | --version)
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printf "distrobox: %s\n" "${version}"
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printf "host-spawn: %s\n" "${host_spawn_version}"
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exit 0
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;;
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-Y | --yes)
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non_interactive=1
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shift
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;;
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--) # End of all options.
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shift
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;;
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-*) # Invalid options.
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printf >&2 "ERROR: Invalid flag '%s'\n\n" "$1"
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show_help
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exit 1
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;;
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*)
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if [ -n "$1" ]; then
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host_command=$1
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shift
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fi
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break
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;;
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esac
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done
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fi
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set -o errexit
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set -o nounset
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# set verbosity
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if [ "${verbose}" -ne 0 ]; then
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set -o xtrace
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fi
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# Check we're running inside a container and not on the host
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if [ ! -f /run/.containerenv ] && [ ! -f /.dockerenv ] && [ -z "${container:-}" ]; then
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printf >&2 "You must run %s inside a container!\n" " $(basename "$0")"
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exit 126
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fi
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if [ -z "${host_command}" ]; then
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host_command="${distrobox_host_exec_default_command}"
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fi
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if [ "$(id -ru)" -ne 0 ]; then
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if command -v sudo 2> /dev/null > /dev/null; then
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sudo_command="sudo"
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else
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sudo_command="su -l -c"
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fi
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fi
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if command -v curl > /dev/null 2>&1; then
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download_command="curl -sLfo"
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elif command -v wget > /dev/null 2>&1; then
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download_command="wget -qO"
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fi
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# Normalize architecture name to comply to golang/release naming
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architecture="$(uname -m)"
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if echo "${architecture}" | grep -q armv; then
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architecture="$(echo "${architecture}" | grep -Eo "armv[0-9]+")"
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fi
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# Setup host-spawn as a way to execute commands back on the host
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if ! command -v host-spawn > /dev/null ||
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[ "$(printf "%s\n%s\n" "${host_spawn_version}" "$(host-spawn --version)" |
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sort -V | head -n 1)" != "${host_spawn_version}" ]; then
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# if non-interactive flag flag hasn't been set
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if [ "${non_interactive}" -eq 0 ]; then
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# Prompt to download it.
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printf "Warning: host-spawn not found or version is too old!\n"
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printf "Do you want to install host-spawn utility? [Y/n] "
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read -r response
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response=${response:-"Y"}
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else
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response="yes"
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fi
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# Accept only y,Y,Yes,yes,n,N,No,no.
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case "${response}" in
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y | Y | Yes | yes | YES)
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# Download matching version with current distrobox
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if ! ${download_command} /tmp/host-spawn \
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"https://github.com/1player/host-spawn/releases/download/${host_spawn_version}/host-spawn-${architecture}"; then
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printf "Error: Cannot download host-spawn\n"
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exit 1
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fi
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if [ -e /tmp/host-spawn ]; then
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${sudo_command} sh -c "mv /tmp/host-spawn /usr/bin/"
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${sudo_command} sh -c "chmod +x /usr/bin/host-spawn"
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fi
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;;
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n | N | No | no | NO)
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printf "Installation aborted, please install host-spawn.\n"
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exit 0
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;;
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*) # Default case: If no more options then break out of the loop.
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printf >&2 "Invalid input.\n"
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printf >&2 "The available choices are: y,Y,Yes,yes,YES or n,N,No,no,NO.\nExiting.\n"
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exit 1
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;;
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esac
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fi
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# This makes host-spawn work on initful containers, where the dbus session is
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# separate from the host, we point the dbus session straight to the host's socket
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# in order to talk with the org.freedesktop.Flatpak.Development.HostCommand on the host
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[ -z "${XDG_RUNTIME_DIR:-}" ] && XDG_RUNTIME_DIR="/run/user/$(id -ru)"
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[ -z "${DBUS_SESSION_BUS_ADDRESS:-}" ] && DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/$(id -ru)/bus"
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XDG_RUNTIME_DIR="/run/host/${XDG_RUNTIME_DIR}"
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DBUS_SESSION_BUS_ADDRESS="unix:path=/run/host/$(echo "${DBUS_SESSION_BUS_ADDRESS}" | cut -d '=' -f2-)"
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###
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# This workaround is needed because of a bug in gio (used by xdg-open) where
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# a race condition happens when allocating a pty, leading to the command
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# being killed before having time to be executed.
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#
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# https://gitlab.gnome.org/GNOME/glib/-/issues/2695
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# https://github.com/1player/host-spawn/issues/7
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#
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# As an (ugly) workaround, we will not allocate a pty for those commands.
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###
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# Also, we don't initialize a pty, if we're not in a tty.
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if [ "$(basename "${host_command}")" = "xdg-open" ] ||
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[ "$(basename "${host_command}")" = "gio" ] ||
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[ "$(basename "${host_command}")" = "flatpak" ] ||
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[ ! -t 1 ] ||
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! tty > /dev/null 2>&1; then
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host-spawn --no-pty "${host_command}" "$@"
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# Exit here, we don't continue execution
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exit $?
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fi
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host-spawn "${host_command}" "$@"
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# Exit here, we don't continue execution
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exit $?
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