i2pdbrowser/linux/build/scripts/start-i2pd-browser

#!/usr/bin/env bash
#
# GNU/Linux does not really require something like RelativeLink.c
# However, we do want to have the same look and feel with similar features.
#
# Copyright 2017 The Tor Project.  See LICENSE for licensing information.

complain_dialog_title="I2Pd Browser"

# Make sure this script wasn't started as 'sh start-i2pd-browser' or similar.
if [ "x$BASH" = "x" ]; then
    echo "$complain_dialog_title should be started as './start-i2pd-browser'"
    echo "Exiting." >&2
    exit 1;
fi

# Do not (try to) connect to the session manager
unset SESSION_MANAGER

# Complain about an error, by any means necessary.
# Usage: complain message
# message must not begin with a dash.
complain () {
	# Trim leading newlines, to avoid breaking formatting in some dialogs.
	complain_message="`echo "$1" | sed '/./,$!d'`"

	# If we're being run in debug/verbose mode, complain to stderr.
	if [ "$show_output" -eq 1 ]; then
		echo "$complain_message" >&2
		return
	fi

	# Otherwise, we're being run by a GUI program of some sort;
	# try to pop up a message in the GUI in the nicest way
	# possible.
	#
	# In mksh, non-existent commands return 127; I'll assume all
	# other shells set the same exit code if they can't run a
	# command.  (xmessage returns 1 if the user clicks the WM
	# close button, so we do need to look at the exact exit code,
	# not just assume the command failed to display a message if
	# it returns non-zero.)

	# First, try zenity.
	zenity --error \
		--title="$complain_dialog_title" \
		--text="$complain_message"
	if [ "$?" -ne 127 ]; then
		return
	fi

	# Try kdialog.
	kdialog --title "$complain_dialog_title" \
		--error "$complain_message"
	if [ "$?" -ne 127 ]; then
		return
	fi

	# Try xmessage.
	xmessage -title "$complain_dialog_title" \
		-center \
		-buttons OK \
		-default OK \
		-xrm '*message.scrollVertical: Never' \
		"$complain_message"
	if [ "$?" -ne 127 ]; then
		return
	fi

	# Try gxmessage.  This one isn't installed by default on
	# Debian with the default GNOME installation, so it seems to
	# be the least likely program to have available, but it might
	# be used by one of the 'lightweight' Gtk-based desktop
	# environments.
	gxmessage -title "$complain_dialog_title" \
		-center \
		-buttons GTK_STOCK_OK \
		-default OK \
		"$complain_message"
	if [ "$?" -ne 127 ]; then
		return
	fi
}

if [ "`id -u`" -eq 0 ]; then
	complain "The I2Pd Browser Bundle should not be run as root.  Exiting."
	exit 1
fi

if test -r /proc/cpuinfo && ! grep -q '^flags\s*:.* sse2' /proc/cpuinfo; then
        complain "I2Pd Browser requires a CPU with SSE2 support.  Exiting."
        exit 1
fi

tbb_usage () {
    printf "\nI2Pd Browser Script Options\n"
    printf "  --verbose         Display Firefox output in the terminal\n"
    printf "  --log [file]      Record Firefox output in file (default: i2pd-browser.log)\n"
    printf "  --detach          Detach from terminal and run I2Pd Browser in the background.\n"
    printf "  --register-app    Register I2Pd Browser as a desktop app for this user\n"
    printf "  --unregister-app  Unregister I2Pd Browser as a desktop app for this user\n"
}
log_output=0
show_output=0
detach=0
show_usage=0
register_desktop_app=0
logfile=/dev/null
while :
do
    case "$1" in
      --detach)
          detach=1
          shift
          ;;
      -v | --verbose | -d | --debug)
          show_output=1
          verbose_arg="$2"
          shift
          ;;
      -h | "-?" | --help | -help)
          show_usage=1
          show_output=1
          shift
          ;;
      -l | --log)
          if [ -z "$2" -o "${2:0:1}" == "-" ]; then
             printf "Logging I2Pd Browser debug information to i2pd-browser.log\n"
             logfile="../i2pd-browser.log"
          elif [ "${2:0:1}" == "/" -o "${2:0:1}" == "~" ]; then
             printf "Logging I2Pd Browser debug information to %s\n" "$2"
             logfile="$2"
             shift
          else
             printf "Logging I2Pd Browser debug information to %s\n" "$2"
             logfile="../$2"
             shift
          fi
          log_output=1
          shift
          ;;
      --register-app)
          register_desktop_app=1
          show_output=1
          shift
          ;;
      --unregister-app)
          register_desktop_app=-1
          show_output=1
          shift
          ;;
      *) # No more options
          break
          ;;
    esac
done

# We can't detach and show output at the same time..
if [ "$show_output" -eq 1 -a "$detach" -eq 1 ]; then
    detach=0
fi

if [ "$show_output" -eq 0 ]; then
    # If the user hasn't requested 'debug mode' or --help, close stdout and stderr,
    # to keep Firefox and the stuff loaded by/for it (including the
    # system's shared-library loader) from printing messages to
    # $HOME/.xsession-errors or other files. (Users wouldn't have seen
    # messages there anyway.)
    exec > "$logfile"
    exec 2> "$logfile"
fi

# If XAUTHORITY is unset, set it to its default value of $HOME/.Xauthority
# before we change HOME below.  (See xauth(1) and #1945.)  XDM and KDM rely
# on applications using this default value.
if [ -z "$XAUTHORITY" ]; then
	XAUTHORITY=~/.Xauthority
	export XAUTHORITY
fi

# If this script is being run through a symlink, we need to know where
# in the filesystem the script itself is, not where the symlink is.
myname="$0"
if [ -L "$myname" ]; then
	# XXX readlink is not POSIX, but is present in GNU coreutils
	# and on FreeBSD.  Unfortunately, the -f option (which follows
	# a whole chain of symlinks until it reaches a non-symlink
	# path name) is a GNUism, so we have to have a fallback for
	# FreeBSD.  Fortunately, FreeBSD has realpath instead;
	# unfortunately, that's also non-POSIX and is not present in
	# GNU coreutils.
	#
	# If this launcher were a C program, we could just use the
	# realpath function, which *is* POSIX.  Too bad POSIX didn't
	# make that function accessible to shell scripts.

	# If realpath is available, use it; it Does The Right Thing.
	possibly_my_real_name="`realpath "$myname" 2>/dev/null`"
	if [ "$?" -eq 0 ]; then
		myname="$possibly_my_real_name"
	else
		# realpath is not available; hopefully readlink -f works.
		myname="`readlink -f "$myname" 2>/dev/null`"
		if [ "$?" -ne 0 ]; then
			# Ugh.
			complain "start-i2pd-browser cannot be run using a symlink on this operating system."
		fi
	fi
fi

# Try to be agnostic to where we're being started from, chdir to where
# the script is.
mydir="`dirname "$myname"`"
test -d "$mydir" && cd "$mydir"

# If ${PWD} results in a zero length string, we can try something else...
if [ ! "${PWD}" ]; then
	# "hacking around some braindamage"
	PWD="`pwd`"
	surveysays="This system has a messed up shell.\n"
fi

# This is a fix for an ibus issue on some Linux systems. See #9353 for more
# details. The symlink needs to be created before we change HOME.
if [ ! -d ".config/ibus" ]; then
  mkdir -p .config/ibus
  ln -nsf ~/.config/ibus/bus .config/ibus
fi

# Fix up .desktop Icon and Exec Paths, and update the .desktop file from the
# canonical version if it was changed by the updater.
cp start-i2pd-browser.desktop ../
sed -i -e "s,^Name=.*,Name=I2Pd Browser,g" ../start-i2pd-browser.desktop
sed -i -e "s,^Icon=.*,Icon=$PWD/browser/chrome/icons/default/default128.png,g" ../start-i2pd-browser.desktop
sed -i -e "s,^Exec=.*,Exec=sh -c '\"$PWD/start-i2pd-browser\" --detach || ([ !  -x \"$PWD/start-i2pd-browser\" ] \&\& \"\$(dirname \"\$*\")\"/Browser/start-i2pd-browser --detach)' dummy %k,g" ../start-i2pd-browser.desktop

if [ "$register_desktop_app" -eq 1 ]; then
	mkdir -p "$HOME/.local/share/applications/"
	cp ../start-i2pd-browser.desktop "$HOME/.local/share/applications/"
	update-desktop-database "$HOME/.local/share/applications/"
	printf "I2Pd Browser has been registered as a desktop app for this user in ~/.local/share/applications/\n"
	exit 0
fi

if [ "$register_desktop_app" -eq -1 ]; then
	if [ -e "$HOME/.local/share/applications/start-i2pd-browser.desktop" ]; then
		rm -f "$HOME/.local/share/applications/start-i2pd-browser.desktop"
		update-desktop-database "$HOME/.local/share/applications/"
		printf "I2Pd Browser has been removed as a user desktop app (from ~/.local/share/applications/)\n"
	else
		printf "I2Pd Browser does not appear to be a desktop app (not present in ~/.local/share/applications/)\n"
	fi
	exit 0
fi

HOME="${PWD}"
export HOME

# Avoid overwriting user's dconf values. Fixes #27903.
export GSETTINGS_BACKEND=memory

cd "${HOME}"

# We pass all additional command-line arguments we get to Firefox.
#
# The --class parameter was added to fix bug 11102.

if [ "$show_usage" -eq 1 ]; then
    # Display Firefox help, then our help
    ./firefox --class "I2Pd Browser" \
        -profile data --help 2>/dev/null
    tbb_usage
elif [ "$detach" -eq 1 ] ; then
    ./firefox --class "I2Pd Browser" \
       -profile data "${@}" > "$logfile" 2>&1 </dev/null &
    disown "$!"
elif [ "$log_output" -eq 1 -a "$show_output" -eq 1 ]; then
    ./firefox --class "I2Pd Browser" \
        -profile data "${@}" 2>&1 </dev/null | \
        tee "$logfile"
elif [ "$show_output" -eq 1 ]; then
    ./firefox --class "I2Pd Browser" \
        -profile data "${@}" < /dev/null
else
    ./firefox --class "I2Pd Browser" \
        -profile data "${@}" > "$logfile" 2>&1 </dev/null
fi

exit $?