Linux 下 Dropbox 的通用更新脚本修改版 – 支持代理

源脚本来自 http://forums.dropbox.com/topic.php?id=12153, 但是不能支持代理服务器, 主要问题是它的”联网检测”用的是ping, Felix将其改成了wget然后判断页面上是否有forums

Patch 如下:

--- a/dbupdate
+++ b/dbupdate
@@ -37,7 +37,7 @@
 declare -r useCount="http://bit.ly/dbupdate_count";
 declare -r nIcon="/usr/share/icons/hicolor/64x64/apps/dropbox.png";
 declare -r userAgent="Mozilla/5.0 (X11; U; Linux i686; $LANG; rv:1.9.1.3) Gecko/20090924 Ubuntu/9.10 (karmic) Firefox/3.5.3";
-declare -r internetTest="ping -c3 -w10 www.dropbox.com | grep -c '64 bytes'" ;
+declare -r internetTest="wget -qO - http://www.dropbox.com | grep -c 'forums'" ;
 bit="auto";
 testing=0;
 q="-q";
@@ -292,7 +292,7 @@
 
 #test connectivity
 printf "Checking for connectivity to Dropbox servers...";
-if [ `eval $internetTest` -lt 3 ]; then { 
+if [ `eval $internetTest` -lt 1 ]; then { 
  echo " FAIL.";
  echo "Failed to connect to \"www.dropbox.com\"";
  exit 1;

以下是修改后完整的 0.2.17 版的脚本:

#!/bin/bash
#Originally authored by Dusten Barker. Originally created on 07sep09.
#Thanks to contributions by Herbert S., Udi M., Olivier G., Darren S., and Luke S. of 
#the Dropbox Forums, and to Andy Piper of http://andypiper.co.uk!

# GNU LGPL Notice
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Lesser General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    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 Lesser General Public License for more details.
#
#    You should have received a copy of the GNU Lesser General Public License
#    along with this program.  If not, see .

# Dropbox  is a proprietary cross-platform backup and
# syncing software, currently available for Linux, Mac OSX, and MS Windows.
#
# dbupdate  is a script written
# to automatically upgrade the experimental build of Dropbox, which does not 
# provide a software upgrade option such as found within the stable builds. 
#
# dbupdate makes use of portions of the Dropbox project to function, such as the
# dropbox executable binary and its graphics.

# Please feel free to leave comments, bug reports, suggestions, and polite
# criticisms about this script in the Dropbox Forums thread pertaining to
# this script.

#init
declare -r ver="0.2.17";
declare -r verdate="25jul10";
declare -r useCount="http://bit.ly/dbupdate_count";
declare -r nIcon="/usr/share/icons/hicolor/64x64/apps/dropbox.png";
declare -r userAgent="Mozilla/5.0 (X11; U; Linux i686; $LANG; rv:1.9.1.3) Gecko/20090924 Ubuntu/9.10 (karmic) Firefox/3.5.3";
declare -r internetTest="wget -qO - http://www.dropbox.com | grep -c 'forums'" ;
bit="auto";
testing=0;
q="-q";
unset altInst;
unset tmpDir;
unset bitVer;
unset curVer;
unset newVer;
unset newFile;
unset getFile;
unset fVer;
unset delay;
unset pstring;
unset noUseCheck;
unset pstring;
unset tmpStr;
unset root;
unset notifier;
unset check;
unset upgrade;
unset overwriteIcons;
unset limit;
unset iscript;
unset lock;


_displayOpt () #help screen
{
 echo;
 echo "Dropbox Updater v"$ver"-"$verdate", written by Dusten Barker.";
 echo "USAGE: dbupdate OPTION...";
 echo "Option \"-b auto\" is implied by default unless otherwise specified."; 
 echo "ex: \"dbupdate -gb32 -f0.7.28\"";
 echo "ex: \"dbupdate -nud 45s\"";
 echo;
 echo " Options:";
 echo "  -b                     32, 64, or auto";
 echo "     32                  use 32 bit Dropbox version";
 echo "     64                  use 64 bit Dropbox version";
 echo "     auto                automatically determine 32 or 64 bit; default";
 echo "  -c                     check if update is available";
 echo "  -d TIME                delay for TIME; ex: 30s, 2m, &c...";
 echo "  -f                     force version, implies -u";
 echo "  -g                     use graphical download progress indicator";
 echo "  -h                     display this screen";
 echo "  -i HOURS               install, requires su/sudo/root";
 echo "     0                   remove cronjob and install, place dbupdate in path";
 echo "     #>0                 number of hours to wait between update checks";
 echo "  -l RATE                limit bandwidth to RATE; ex: 320k, 1.2m, &c...";
 echo "  -n                     use notifier, if installed (/usr/bin/notify-send)";
 echo "  -o			overwrite icons, do not preserve";
 echo "  -r                     allow use as root user";
 echo "  -u                     perform update. implies -c unless -f";
 echo "  -x                     do not send use count";
 echo;
}

_checkExit () #check exit status
{
 if [ ! $? -eq 0 ]; then {
  echo "Error $? returned.";
  echo "Aborting.";
  exit 2;
 } fi;
}

_compareVer () #two-dot comparator script-foo
{
 unset _compareVerGT;
 unset _compareVerLT;
 unset ver1Maj;
 unset ver1Min;
 unset ver1Pat;
 unset ver2Maj;
 unset ver2Min;
 unset ver2Pat;
 ver1Maj="$(echo $1 | cut -d'.' -f1)";
 ver1Min="$(echo $1 | cut -d'.' -f2)";
 ver1Pat="$(echo $1 | cut -d'.' -f3)";
 ver2Maj="$(echo $2 | cut -d'.' -f1)";
 ver2Min="$(echo $2 | cut -d'.' -f2)";
 ver2Pat="$(echo $2 | cut -d'.' -f3)";
 if [ $ver1Pat -ne $ver2Pat ]; then if [ $ver1Pat -gt $ver2Pat ]; then { _compareVerGT=$1; _compareVerLT=$2; } else { _compareVerGT=$2; _compareVerLT=$1; } fi; fi;
 if [ $ver1Min -ne $ver2Min ]; then if [ $ver1Min -gt $ver2Min ]; then { _compareVerGT=$1; _compareVerLT=$2; } else { _compareVerGT=$2; _compareVerLT=$1; } fi; fi;
 if [ $ver1Maj -ne $ver2Maj ]; then if [ $ver1Maj -gt $ver2Maj ]; then { _compareVerGT=$1; _compareVerLT=$2; } else { _compareVerGT=$2; _compareVerLT=$1; } fi; fi;
 if [ $1 = $2 ]; then { _compareVerGT=$1; _compareVerLT=0; }; fi;
}

_installdbupdate () #install script to path and control cron job
{
 tmpStr="dbupdate"
 if [ $iscript -eq 0 ]; then {
  if [ ! -d "/usr/share/dbupdate" ]; then { 
   mkdir /usr/share/dbupdate ; _checkExit; 
  } fi;
  if [ ! -d "/usr/share/dbupdate/dbupdate$ver" ]; then {
   mkdir /usr/share/dbupdate/dbupdate$ver ; _checkExit; 
  } fi;
  cp $0 /usr/share/dbupdate/dbupdate$ver/ ; _checkExit;
  chmod +x /usr/share/dbupdate/dbupdate$ver/$(basename $0) ; _checkExit;
  ln -fs /usr/share/dbupdate/dbupdate$ver/$(basename $0) /usr/bin/dbupdate ; _checkExit;
  sed -i "/$tmpStr/d" /etc/crontab;
 } fi;
 if [ $iscript -ne 0 ]; then {
  if [ ! $SUDO_USER ]; then SUDO_USER=root; fi;
  sed -i "/$tmpStr/d" /etc/crontab;
  echo "0 */$1 * * * $SUDO_USER if [ -e /usr/bin/dbupdate ]; then export DISPLAY=:0.0; dbupdate -nu; fi;" >> /etc/crontab
 } fi;
}

_dbVer () #get version of current dropbox install
{
 if [ ! -f ~/.dropbox-dist/VERSION ]; then {
  echo "FAIL!";
  echo "Dropbox version not detected. Aborting.";
  exit 1;
 } else {
  read curVer < ~/.dropbox-dist/VERSION ;
 } fi;
}


_notify () #notify-osd, if present
{
 if [ $notifier ]; then {
  if [ -e "/usr/bin/notify-send" -a -e $nIcon ]; then {
   if [ "$1" = "upgrade" ]; then { eval "/usr/bin/notify-send -i $nIcon 'Upgrade complete.' 'dbupdate has upgraded Dropbox on this computer to v"$newVer"'" ; _checkExit; } fi;
   if [ "$1" = "check" ]; then { eval "/usr/bin/notify-send -i $nIcon 'Upgrade available.' 'dbupdate has found an available Dropbox upgrade to v"$newVer"'" ; _checkExit; } fi;
   if [ "$1" = "checkupgrade" ]; then { eval "/usr/bin/notify-send -i $nIcon 'Upgrade available.' 'dbupdate has found an available Dropbox upgrade to v"$newVer" and is downloading it now.'" ; _checkExit; } fi;
  } fi;
 } fi;
}

_bitAutodetect () #detect for 64bit or 32bit installed dropbox
{
 if [ -d ~/.dropbox-dist/ncrypt*linux-x86_64.egg/ ]; then { bit=64; } else
 if [ -d ~/.dropbox-dist/ncrypt*linux-i686.egg/ ]; then { bit=32; } else
 if [ $(uname -m) == "i386" ] || [ $(uname -m) == "i586" ] || [ $(uname -m) == "i686" ]; then { bit=32; } else
 if [ $(uname -m) == "x86_64" ]; then { bit=64; } else {
  echo " FAIL.";
  echo "Try forcing architecture with \"-b\".";
  exit 1;
 } fi; fi; fi; fi;
}

# ------------------------- main ------------------------------

if [ "$1" == "moo" ]; then { echo "You're wrong if you think I have super cow powers."; exit 0; } fi;

#check if already running
printf "Getting file lock...";
lock="/tmp/$(basename $0).LCK";
exec 8>$lock; #send to handler 8
if flock -n -e 8; then :
else {
 echo " FAIL.";
 echo "Cannot lock $0.  Aborting.";
 exit 1;
} fi;
echo " Done.";

#gather options from command line and set flags
if [ $# -eq 0 ]; then echo "Use \"$0 -h\" for usage and help."; exit 0; fi; #display message and quit if no command line arguments found
while getopts uchxnrgoi:f:t:d:b:l: opt
do {
 case "$opt" in
  b) if [ "$OPTARG" = "32" ]; then bit=$OPTARG; else
     if [ "$OPTARG" = "64" ]; then bit=$OPTARG; else
     if [ "$OPTARG" = "auto" ]; then bit=$OPTARG; else {
      echo "The -b option argument \"$OPTARG\" is invalid.";
      echo "Use \"$0 -h\" for usage and help."; 
      exit 1;
     } fi; fi; fi;;
  d) delay=$OPTARG;;
  u) upgrade=1; check=1;;
  c) check=1;;
  h) _displayOpt; exit 0;;
  t) notifier=1; #test option for notifier - hidden flag
     _notify $OPTARG;
     exit 0;; 
  x) noUseCheck=1;;
  n) notifier=1;;
  f) fVer=$OPTARG; upgrade=1;;  
  l) limit="--limit-rate="$OPTARG;;
  i) iscript=$OPTARG;;
  o) overwriteIcons=1;;
  g) if [ -e "/usr/bin/zenity" ]; then pstring="2>&1 | sed -u 's/.* \([0-9]\+%\)\ \+\([0-9.]\+.\) \(.*\)/\1\n# Downloading at \2\/s, ETA \3/' | zenity --progress --auto-close --title='dbupdate - Dropbox...' "; unset q;
     else echo "Cannot use progress indicator.";
     fi;;
  r) root=1;;
  \?) echo "Use \"$0 -h\" for usage and help."; exit 1;;
 esac;
} done;
shift `expr $OPTIND - 1`;

#check root;
if [ ! $iscript ] && [ ! $root ]; then {
 if [ $EUID -eq 0 ]; then {
  echo "dbupdate only requires root during install-type procedures.";
  echo "If you require use by root user, force with the \"-r\" option.";
  exit 1;
 } fi;
} fi;
if [ $root ] && [ $EUID -ne 0 ]; then {
 echo "You can not use \"-r\" flag unless you are root.";
 exit 1;
} fi;


#delay, if any
if [ $delay ]; then {
 printf "Waiting for $delay...";
 sleep $delay;
 _checkExit;
 echo " Done.";
} fi;

#test for or create temporary space
if [ $check ] || [ $fVer ]; then {
 printf "Looking for temporary space...";
 tmpDir=`mktemp -d` ; _checkExit;
 if [ -d $tmpDir ]; then {
  echo  " Created.";
 } else {
  echo "FAIL.";
  echo;
  echo "Could not create $tmpDir";
  exit 1;
 } fi;
} fi;

#self-install
if [ $iscript ] && [ ! $EUID -eq 0 ]; then {
 echo "You must be root to use the \"-i\" option.";
 exit 1;
} fi;
if [ $iscript ]; then {
 printf "Installing dbupdate...";
 _installdbupdate $iscript;
 echo " Done.";
 exit 0;
} fi;

#check for alternate install
printf "Checking for alternate install...";
if [ -e ~/.dropbox-alt/dropbox ]; then {
 echo " Found.";
 altInst=1;
} else {
 echo " Not found.";
} fi;

#test connectivity
printf "Checking for connectivity to Dropbox servers...";
if [ `eval $internetTest` -lt 1 ]; then { 
 echo " FAIL.";
 echo "Failed to connect to \"www.dropbox.com\"";
 exit 1;
} fi;
echo " Done.";
 
#autodetect 32 or 64 bit dropbox install
if [ "$bit" = "auto" ]; then {
 printf "Detecting Dropbox architecture...";
 _bitAutodetect;
 printf " Done.";
} else {
 printf "Forcing Dropbox architechture... Done.";
} fi;
if [ $bit = 32 ]; then { bitVer=""; echo " (32bit)"; } fi;
if [ $bit = 64 ]; then { bitVer="_64"; echo " (64bit)"; } fi;

#determine currently installed version
if [ $check ] && [ ! $fVer ]; then {
 printf "Checking currently installed version...";
 _dbVer;
 echo " Done. ($curVer)";
} fi;

#see if forced version
if [ $fVer ]; then newVer=$fVer; curVer="0.0.0"; else {
 #if not forced version, CHECK for latest version
 if [ $check ]; then {
  printf "Checking for update...";
  newVer1=`wget -q --tries=3 -O - www.dropbox.com/release_notes/rss.xml | xpath -q -e "//channel/item[1]/title" | sed "s@<\([^<>][^<>]*\)>\([^<>]*\)@\2@g" | sed -e "y/\t/ /;s/ *$//;s/^.* //"`;
  #sanity test; check for expected output format
  if [ ! $(echo $newVer1 | tr -dc '.' | wc -c) -eq 2 ] || [ $(echo $newVer1 | awk '{print gsub("[0-9]", "")}') -le 3 ]; then {
   echo " FAIL.";
   exit 1;
  } fi;
  echo " Done.";
  if [ ! $noUseCheck ]; then { eval "wget -q $limit --referer='http://dbupdate_use_count/$ver' --user-agent='$userAgent' -O /dev/null $useCount"; } fi;
  _compareVer $newVer1 $curVer;
  newVer=$_compareVerGT;
  if [ $_compareVerLT = 0 ]; then {
   echo "$curVer is the latest available version. Update not required.";
   exit 0;
  } fi;
  if [ ! $upgrade ]; then {
   echo "Dropbox v$curVer can be updated to v$newVer";
   _notify check;
   exit 0;
  } fi;
  _notify checkupgrade;
 } fi;
} fi;

#preserve icons
if [ ! $overwriteIcons ]; then {
 _compareVer $curVer 0.8.55;
 if [ $_compareVerGT = $curVer ]; then {
  printf "Backing up icons...";
  mkdir $tmpDir/backupIcons ; _checkExit;
  if [ -d ~/.dropbox-dist/icons/ ]; then {
   cp -r ~/.dropbox-dist/icons/* $tmpDir/backupIcons ; _checkExit;
   echo " Done.";
  } else {
   echo "Does not exist. Skipping.";
   unset overwriteIcons;
  } fi;
 } fi;
} fi;

#download upgrade
if [ $upgrade ]; then {
 printf "Downloading update. This may take a few minutes...";
 newFile="dropbox-lnx.x86"$bitVer"-"$newVer".tar.gz" ;
 getFile="http://dl.dropbox.com/u/17/"$newFile ;
 eval "wget $q $limit --referer='http://dbupdate' --user-agent='$userAgent' -O $tmpDir/$newFile $getFile $pstring &" ; _checkExit;
 i=1
 sp="/-\|"
 echo -n ' ';
 while pgrep wget &>/dev/null; do {
  printf "\b${sp:i++%${#sp}:1}" ;
  sleep 0.25;
 } done;
 echo -e "\b Done";
 while [ $testing -eq 0 ]; do {
  sleep 0.5s;
  if [ -z "$(pidof zenity)" ]; then {
   pkill wget;
   testing=1;
   if [ ! $? -eq 0 ]; then { echo "Operation cancelled."; exit 1; } fi;
  } fi;
 } done;
 #check download
 #printf "Verify download...";
 if [ ! -e $tmpDir/$newFile ] || [ $(stat -c%s "$tmpDir/$newFile") -le 10000 ]; then {
  echo " Verify download FAIL.";
  exit 1;
 } fi;
 #echo " Done.";
 #install upgrade
 if [ -e /usr/bin/dropbox ]; then {
  printf "Stopping Dropbox...";
  killall -q dropbox; #_checkExit;
  sleep 1;
  killall -q dropbox; #_checkExit;
  sleep 1;
  echo " Done.";
 } fi;
 printf "Installing Dropbox $newVer...";
 rm -fr ~/.dropbox-dist ; _checkExit;
 tar xzf $tmpDir/$newFile -C ~/ ; _checkExit;
 echo " Done.";
 #restore icons
 if [ ! $overwriteIcons ] && [ -d $tmpDir/backupIcons ]; then {
  printf "Restoring previous icons...";
  cp -r $tmpDir/backupIcons/* ~/.dropbox-dist/icons ; _checkExit;
  echo " Done.";
 } fi;
 #install alternate
 if [ $altInst ]; then {
  printf "Updating alternate install...";
  cp -r ~/.dropbox-dist ~/.dropbox-alt ; _checkExit;
  echo " Done.";
 } fi;
 #start Dropbox
 printf "Starting Dropbox...";
 if [ -e /usr/bin/dropbox ]; then { 
  ~/.dropbox-dist/dropbox start &
  echo " Done."; 
 } else {
  ~/.dropbox-dist/dropboxd start -i &
  echo " Done.";
 } fi;
 if [ $altInst ]; then { #start alt
  printf "Starting alternate Dropbox...";
  ~/.dropbox-alt/dropbox start &
  echo " Done.";
 } fi;
 #finish
 _notify upgrade; 
 echo "Complete.";
} fi;
rm $lock