commit e167e931c8e75d3915317ae3da5d3da747ef5065 Author: Robert Ransom rransom.8774@gmail.com Date: Wed Aug 24 00:46:50 2011 -0400

[Linux] Add a 'complain' shell function to RelativeLink.sh

If the user is running start-tor-browser from a GUI file manager, he/she/it probably won't see any messages we output to stdout/stderr. The 'complain' function tries to make sure the user will actually see an error message. --- src/RelativeLink/RelativeLink.sh | 51 ++++++++++++++++++++++++++++++++++++++ 1 files changed, 51 insertions(+), 0 deletions(-)

diff --git a/src/RelativeLink/RelativeLink.sh b/src/RelativeLink/RelativeLink.sh index fe00dcd..0435054 100755 --- a/src/RelativeLink/RelativeLink.sh +++ b/src/RelativeLink/RelativeLink.sh @@ -7,6 +7,57 @@ # # Copyright 2010 The Tor Project. See LICENSE for licensing information.

+# Complain about an error, by any means necessary. +# Usage: complain message +# message must not begin with a dash. +complain () { + # If we're being run in a terminal, complain there. + # + # FIXME Hopefully the user didn't run startx on the console and then + # double-click 'start-tor-browser' in a GUI file manager. + if [ -t 2 ]; then + echo "$1" >&2 + return + fi + + # Otherwise, hope that we're being run in a GUI of some sort, + # and try to pop up a message there 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.) + # + # If DISPLAY isn't set, the first command on the list will + # fail with a non-127 exit code; that feels wrong somehow, but + # there's nothing better we can do in that case anyway. + + # First, try zenity. + zenity --error --text="$1" + if [ "$?" -ne 127 ]; then + return + fi + + # Try xmessage. + xmessage "$1" + if [ "$?" -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 "$1" + if [ "$?" -ne 127 ]; then + return + fi +} + if [ "`id -u`" -eq 0 ]; then echo "The Tor Browser Bundle should not be run as root. Exiting." exit 1