chrome/browser/mac/install.sh

   1 #!/bin/bash -p
   2
   3 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style license that can be
   5 # found in the LICENSE file.
   6
   7 # Called by the application to install in a new location.  Generally, this
   8 # means that the application is running from a disk image and wants to be
   9 # copied to /Applications.  The application, when running from the disk image,
  10 # will call this script to perform the copy.
  11 #
  12 # This script will be run as root if the application determines that it would
  13 # not otherwise have permission to perform the copy.
  14 #
  15 # When running as root, this script will be invoked with the real user ID set
  16 # to the user's ID, but the effective user ID set to 0 (root).  bash -p is
  17 # used on the first line to prevent bash from setting the effective user ID to
  18 # the real user ID (dropping root privileges).
  19
  20 set -e
  21
  22 # This script may run as root, so be paranoid about things like ${PATH}.
  23 export PATH="/usr/bin:/usr/sbin:/bin:/sbin"
  24
  25 # If running as root, output the pid to stdout before doing anything else.
  26 # See chrome/browser/mac/authorization_util.h.
  27 if [ ${EUID} -eq 0 ] ; then
  28   echo "${$}"
  29 fi
  30
  31 if [ ${#} -ne 2 ] ; then
  32   echo "usage: ${0} SRC DEST" >& 2
  33   exit 2
  34 fi
  35
  36 SRC=${1}
  37 DEST=${2}
  38
  39 # Make sure that SRC is an absolute path and that it exists.
  40 if [ -z "${SRC}" ] || [ "${SRC:0:1}" != "/" ] || [ ! -d "${SRC}" ] ; then
  41   echo "${0}: source ${SRC} sanity check failed" >& 2
  42   exit 3
  43 fi
  44
  45 # Make sure that DEST is an absolute path and that it doesn't yet exist.
  46 if [ -z "${DEST}" ] || [ "${DEST:0:1}" != "/" ] || [ -e "${DEST}" ] ; then
  47   echo "${0}: destination ${DEST} sanity check failed" >& 2
  48   exit 4
  49 fi
  50
  51 # Do the copy.
  52 rsync -lrpt "${SRC}/" "${DEST}"
  53
  54 # The remaining steps are not considered critical.
  55 set +e
  56
  57 # Notify LaunchServices.
  58 CORESERVICES="/System/Library/Frameworks/CoreServices.framework"
  59 LAUNCHSERVICES="${CORESERVICES}/Frameworks/LaunchServices.framework"
  60 LSREGISTER="${LAUNCHSERVICES}/Support/lsregister"
  61 "${LSREGISTER}" -f "${DEST}"
  62
  63 # If this script is not running as root and the application is installed
  64 # somewhere under /Applications, try to make it writable by all admin users.
  65 # This will allow other admin users to update the application from their own
  66 # user Keystone instances even if the Keystone ticket is not promoted to
  67 # system level.
  68 #
  69 # If the script is not running as root and the application is not installed
  70 # under /Applications, it might not be in a system-wide location, and it
  71 # probably won't be something that other users on the system are running, so
  72 # err on the side of safety and don't make it group-writable.
  73 #
  74 # If this script is running as root, a Keystone ticket promotion is expected,
  75 # and future updates can be expected to be applied as root, so
  76 # admin-writeability is not a concern.  Set the entire thing to be owned by
  77 # root in that case, regardless of where it's installed, and drop any group
  78 # and other write permission.
  79 #
  80 # If this script is running as a user that is not a member of the admin group,
  81 # the chgrp operation will not succeed.  Tolerate that case, because it's
  82 # better than the alternative, which is to make the application
  83 # world-writable.
  84 CHMOD_MODE="a+rX,u+w,go-w"
  85 if [ ${EUID} -ne 0 ] ; then
  86   if [ "${DEST:0:14}" = "/Applications/" ] &&
  87      chgrp -Rh admin "${DEST}" >& /dev/null ; then
  88     CHMOD_MODE="a+rX,ug+w,o-w"
  89   fi
  90 else
  91   chown -Rh root:wheel "${DEST}" >& /dev/null
  92 fi
  93
  94 chmod -R "${CHMOD_MODE}" "${DEST}" >& /dev/null
  95
  96 # On the Mac, or at least on HFS+, symbolic link permissions are significant,
  97 # but chmod -R and -h can't be used together.  Do another pass to fix the
  98 # permissions on any symbolic links.
  99 find "${DEST}" -type l -exec chmod -h "${CHMOD_MODE}" {} + >& /dev/null
 100
 101 # Host OS version check, to be able to take advantage of features on newer
 102 # systems and fall back to slow ways of doing things on older systems.
 103 OS_VERSION=$(sw_vers -productVersion)
 104 OS_MAJOR=$(sed -Ene 's/^([0-9]+).*/\1/p' <<< ${OS_VERSION})
 105 OS_MINOR=$(sed -Ene 's/^([0-9]+)\.([0-9]+).*/\2/p' <<< ${OS_VERSION})
 106
 107 # Because this script is launched by the application itself, the installation
 108 # process inherits the quarantine bit (LSFileQuarantineEnabled).  Any files or
 109 # directories created during the update will be quarantined in that case,
 110 # which may cause Launch Services to display quarantine UI.  That's bad,
 111 # especially if it happens when the outer .app launches a quarantined inner
 112 # helper.  Since the user approved the application launch if quarantined, it
 113 # it can be assumed that the installed copy should not be quarantined.  Use
 114 # xattr to drop the quarantine attribute.
 115 QUARANTINE_ATTR=com.apple.quarantine
 116 if [ ${OS_MAJOR} -gt 10 ] ||
 117    ([ ${OS_MAJOR} -eq 10 ] && [ ${OS_MINOR} -ge 6 ]) ; then
 118   # On 10.6, xattr supports -r for recursive operation.
 119   xattr -d -r "${QUARANTINE_ATTR}" "${DEST}" >& /dev/null
 120 else
 121   # On earlier systems, xattr doesn't support -r, so run xattr via find.
 122   find "${DEST}" -exec xattr -d "${QUARANTINE_ATTR}" {} + >& /dev/null
 123 fi
 124
 125 # Great success!
 126 exit 0