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#!/bin/sh -e
#
# byobu - wrapper script
# Copyright (C) 2008-2009 Canonical Ltd.
# Copyright (C) 2008-2024 Dustin Kirkland
#
# Authors: Dustin Kirkland <kirkland@byobu.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
VERSION=6.11
PKG="byobu"
# All sorts of things go wrong if you don't own your $HOME dir.
# This happens under sudo, if you don't use the -H option; Byobu will
# create a bunch of files in your $HOME which will be owned by root.
if [ ! -O "$HOME" ]; then
echo "Cannot run $PKG because [$USER] does not own [$HOME]" 1>&2
if [ -n "$SUDO_USER" ]; then
echo "To run $PKG under sudo, you MUST use 'sudo -H'" 1>&2
fi
exit 1
fi
# If we're in a busybox/ash shell (or shell is undefined),
# and a full bash shell is available, then please let's use bash in byobu.
# Other shells are supported, but your mileage may vary...
if [ "$SHELL" = "/bin/ash" ] || [ "$SHELL" = "ash" ] || [ -z "$SHELL" ]; then
[ -x "/bin/bash" ] && export SHELL="/bin/bash"
fi
# Source local byobu config
if [ -r "$HOME/.byoburc" ]; then
# Ensure that this configuration is usable
. "$HOME/.byoburc" || mv -f "$HOME/.byoburc" "$HOME/.byoburc".orig
fi
if [ -z "${BYOBU_PREFIX}" ]; then
# Find and export the installation location prefix
greadlink -f . >/dev/null 2>&1 && export BYOBU_READLINK="greadlink" || export BYOBU_READLINK="readlink"
prefix="$(dirname $(dirname $($BYOBU_READLINK -f $0)))"
if [ "$prefix" != "/usr" ]; then
echo "export BYOBU_PREFIX='$prefix'" >> "$HOME/.byoburc"
. "$HOME/.byoburc"
fi
fi
export BYOBU_CHARMAP=$(locale charmap)
[ -r "$HOME/.byoburc" ] && . "$HOME/.byoburc"
[ -z "${BYOBU_PREFIX}" ] && export BYOBU_PREFIX="/usr" || export BYOBU_PREFIX
. "${BYOBU_PREFIX}/lib/${PKG}/include/common"
# Override backend if we can determine intentions from argv[0]
[ -r "$BYOBU_CONFIG_DIR/backend" ] && . "$BYOBU_CONFIG_DIR/backend"
case "$0" in
*byobu-screen) BYOBU_BACKEND="screen" ;;
*byobu-tmux) BYOBU_BACKEND="tmux" ;;
esac
# At this point, we're sure BYOBU_BACKEND is properly defined
export BYOBU_BACKEND
# Store the parent tty
if eval $BYOBU_TEST tty >/dev/null 2>&1; then
export BYOBU_TTY=$(tty)
else
export BYOBU_TTY=$(readlink /proc/$$/fd/0)
fi
# Get the default window name
[ -n "$BYOBU_WINDOW_NAME" ] || BYOBU_WINDOW_NAME=-
# Add a version argument for debugging purposes, enter manpage for help
if [ "$#" = "1" ]; then
case "$1" in
-v|--version)
echo "$PKG version $VERSION"
if eval $BYOBU_TEST bash >/dev/null 2>&1; then
# Check ulimits
u=$(bash -c "ulimit -n")
[ "$u" = "unlimited" ] || [ $u -ge 15 ] || echo "WARNING: ulimit -n is too low" 1>&2
u=$(bash -c "ulimit -u")
[ "$u" = "unlimited" ] || [ $u -ge 1600 ] || echo "WARNING: ulimit -u is too low" 1>&2
fi
exec $BYOBU_BACKEND $BYOBU_ARG_VERSION
exit 0
;;
-h|--help)
exec man $PKG
;;
esac
fi
# Check if we're being autolaunched, and this user explicitly does not want it.
if [ "$0" = "/etc/profile.d/Z97-$PKG.sh" ] && [ -r "$BYOBU_CONFIG_DIR/disable-autolaunch" ]; then
exit 0
fi
# Sanitize the environment
byobu-janitor --force
# Set the window title if this is a TTY
if [ -t 1 ]; then
[ -r "$BYOBU_CONFIG_DIR/statusrc" ] && . "$BYOBU_CONFIG_DIR/statusrc"
. $BYOBU_PREFIX/lib/$PKG/ip_address
BYOBU_TITLE=${BYOBU_ALT_TITLE:-'${USER}@${HOSTNAME:-$(hostname)} ($(__ip_address t)) - ${PKG}'}
[ -n "$BYOBU_NO_TITLE" ] || eval printf \"\\033\]0\;${BYOBU_TITLE}\\007\"
fi
# Drop a symlink to the ssh socket in $HOME, since we can ensure that exists
if [ -S "$SSH_AUTH_SOCK" ] && [ ! -h "$SSH_AUTH_SOCK" ]; then
ln -sf "$SSH_AUTH_SOCK" "$BYOBU_CONFIG_DIR/.ssh-agent"
export SSH_AUTH_SOCK="$BYOBU_CONFIG_DIR/.ssh-agent"
fi
# Fallback terminfo
[ -z "$BYOBU_DEFAULT_TERM" ] && BYOBU_DEFAULT_TERM="screen"
# Color terminfo to use, if possible
[ -z "$BYOBU_COLOR_TERM" ] && BYOBU_COLOR_TERM="screen-256color"
# Check if our terminfo supports 256 colors
CAN_SHOW_COLORS=
if eval $BYOBU_TEST tput >/dev/null 2>&1; then
if [ "$(tput colors 2>/dev/null || echo 0)" = "256" ]; then
CAN_SHOW_COLORS=1
fi
fi
# Check if the color terminfo is available
HAS_COLOR_TERM=
if eval $BYOBU_TEST infocmp >/dev/null 2>&1; then
if infocmp "$BYOBU_COLOR_TERM" >/dev/null 2>&1; then
HAS_COLOR_TERM=1
fi
fi
case $BYOBU_BACKEND in
tmux)
# Use 256 colors if possible
if [ -n "$CAN_SHOW_COLORS" ] || [ "$COLORTERM" = "gnome-terminal" ] || [ "$TERM" = "xterm" ] || [ "$TERM" = "xterm-256color" ] || [ "$TERM" = "screen" ]; then
[ -z "$SCREEN_TERM" ] && SCREEN_TERM="-2"
fi
if [ -z "$BYOBU_TERM" ]; then
if [ -n "$SCREEN_TERM" -a -n "$HAS_COLOR_TERM" ]; then
BYOBU_TERM="$BYOBU_COLOR_TERM"
else
BYOBU_TERM="$BYOBU_DEFAULT_TERM"
fi
fi
BYOBU_PROFILE="-f $BYOBU_PREFIX/share/$PKG/profiles/tmuxrc"
# Set default window, unless user has overriden
if egrep -qs "default-command|default-shell" $BYOBU_CONFIG_DIR/.tmux.conf >/dev/null 2>&1; then
DEFAULT_WINDOW=
else
DEFAULT_WINDOW="new-session -n $BYOBU_WINDOW_NAME ${BYOBU_PREFIX}/bin/byobu-shell"
fi
sessions=$($BYOBU_BACKEND list-sessions 2>/dev/null) || true
CUSTOM_WINDOW_SET=0
if [ -s "$BYOBU_CONFIG_DIR/windows.tmux.$BYOBU_WINDOWS" ]; then
CUSTOM_WINDOW_SET=1
BYOBU_WINDOWS="$BYOBU_CONFIG_DIR/windows.tmux.$BYOBU_WINDOWS"
elif [ -s "$BYOBU_CONFIG_DIR/windows.tmux" ]; then
CUSTOM_WINDOW_SET=1
BYOBU_WINDOWS="$BYOBU_CONFIG_DIR/windows.tmux"
fi
;;
screen)
# Allow override of default window list, with BYOBU_WINDOWS environment variable
CUSTOM_WINDOW_SET=0
if [ -s "$BYOBU_WINDOWS" ]; then
CUSTOM_WINDOW_SET=1
elif [ -s "$BYOBU_CONFIG_DIR/windows.$BYOBU_WINDOWS" ]; then
CUSTOM_WINDOW_SET=1
BYOBU_WINDOWS="$BYOBU_CONFIG_DIR/windows.$BYOBU_WINDOWS"
elif [ "$#" = "0" ]; then
BYOBU_WINDOWS="$BYOBU_CONFIG_DIR/windows"
else
BYOBU_WINDOWS="/dev/null"
fi
export BYOBU_WINDOWS
# Launch shell, unless the user has default windows set to launch
uncommented_lines < "$BYOBU_WINDOWS" && DEFAULT_WINDOW= || DEFAULT_WINDOW="${BYOBU_PREFIX}/bin/byobu-shell"
# Use 256 colors if possible
if [ -z "$BYOBU_TERM" ]; then
if [ -n "$CAN_SHOW_COLORS" -a -n "$HAS_COLOR_TERM" ]; then
BYOBU_TERM="$BYOBU_COLOR_TERM"
else
BYOBU_TERM="$BYOBU_DEFAULT_TERM"
fi
fi
SCREEN_TERM="-T $BYOBU_TERM"
# Some users want to maintain separate configurations
# if they use both GNU Screen and byobu on the same system
if [ -r "$BYOBU_CONFIG_DIR/.screenrc" ]; then
BYOBU_PROFILE="-c $BYOBU_PREFIX/share/$PKG/profiles/byoburc"
else
BYOBU_PROFILE="-c $BYOBU_PREFIX/share/$PKG/profiles/screenrc"
fi
BYOBU_SESSION_NAME="-S $PKG"
# Zero out $BYOBU_SESSION_NAME if user has specified a session name
for i in "$@"; do
case $i in
-*r*|-*d*|-*D*|-*S*|-ls|-list)
BYOBU_SESSION_NAME=
;;
esac
done
sessions=$($BYOBU_BACKEND -wipe 2>/dev/null) || true
;;
esac
export BYOBU_TERM
# Save session info
[ -n "$DBUS_SESSION_BUS_ADDRESS" ] && printf "DBUS_SESSION_BUS_ADDRESS=$DBUS_SESSION_BUS_ADDRESS\n" > "$BYOBU_RUN_DIR/sockets"
[ -n "$SESSION_MANAGER" ] && printf "SESSION_MANAGER=$SESSION_MANAGER\n" >> "$BYOBU_RUN_DIR/sockets"
# Now let's execute the backend!
if [ "$#" = "0" ]; then
if [ "$CUSTOM_WINDOW_SET" = "1" ]; then
# Start new custom window set session
case $BYOBU_BACKEND in
tmux)
exec tmux -u $SCREEN_TERM $BYOBU_PROFILE $(cat "$BYOBU_WINDOWS")
;;
screen)
exec screen $SCREEN_TERM $BYOBU_SESSION_NAME $BYOBU_PROFILE
;;
esac
else
case "$sessions" in
*\(*\)*)
# Select and attach to an existing session
exec byobu-select-session
;;
*)
# Start new default session
case $BYOBU_BACKEND in
tmux)
exec tmux -u $SCREEN_TERM $BYOBU_PROFILE $DEFAULT_WINDOW
;;
screen)
exec screen $SCREEN_TERM $BYOBU_SESSION_NAME $BYOBU_PROFILE $DEFAULT_WINDOW
;;
esac
;;
esac
fi
else
# Launch with command line args
case $BYOBU_BACKEND in
tmux)
exec tmux -u $SCREEN_TERM $BYOBU_PROFILE "$@"
;;
screen)
exec screen $SCREEN_TERM $BYOBU_SESSION_NAME $BYOBU_PROFILE "$@"
;;
esac
fi
# vi: syntax=sh ts=4 noexpandtab