Need help completing a bash script

[WaldMeister]

Hi,

 

I'm currently working on a script to automatically patch the files to get the HD4600 working.

The script works as intended, but has no checks.

 

What i would like to do is check for a value in a plist or binary, if present, continue patching, if the value is not found, skip the file. 

 

Did some research, but failed to get it working. Any help would be appreciated.

#!/bin/bash
#Definitions
p5000=/System/Library/Extensions/AppleIntelHD5000Graphics.kext/Contents/Info.plist
b5000=/System/Library/Extensions/AppleIntelHD5000Graphics.kext/Contents/MacOS/AppleIntelHD5000Graphics
pazul=/System/Library/Extensions/AppleIntelFramebufferAzul.kext/Contents/Info.plist
bazul=/System/Library/Extensions/AppleIntelFramebufferAzul.kext/Contents/MacOS/AppleIntelFramebufferAzul

if [ $(id -u) != 0 ]; then
echo "You need to run this script as root. Type sudo -s, enter password and run this script again."
exit
fi
#Inject ID to AppleIntelHD5000Graphics Info.plist
echo "Patching $p5000"
sudo sed -i.bak 's/0412/0416/g' $p5000
echo "Info.plist patched"

#Patch AppleIntelHD5000Graphics.kext binary
echo "Patching $b5000"
sudo perl -pi -e 's|\x86\x80\x12\x04|\x86\x80\x16\x04|g' -i.bak $b5000
echo "AppleIntelHD5000 binary patched"

#Inject ID to AppelIntelFramebufferAzul Info.plist
echo "Patching $pazul"
sudo sed -i.bak 's/0412/0416/g' $pazul
echo "Info.plist patched"

#Patch AppleIntelFramebufferAzul binary
echo "Patching $bazul"
sudo perl -pi -e 's|\x60\x00\x00\x00\x00\x60\xD9|\x90\x00\x00\x00\x00\x80\xD9|g' -i.bak $bazul
echo "AppleIntelFramebufferAzul binary patched"

#Update caches
echo "Updating caches"
sudo touch /System/Library/Extensions
sudo kextcache -u /
echo "Finished"

 

Example: 

#Inject ID to AppleIntelHD5000Graphics Info.plist
echo "Patching $p5000"
if 0412 found then
sudo sed -i.bak 's/0412/0416/g' $p5000
echo "Info.plist patched"
else
skip file
echo " file skipped" 

I tried defaults read /System/Library/Extensions/AppleIntelHD5000Graphics.kext/Contents/Info | grep, but somehow i can not get comparison to that output to work.

[MacUser2525]

I am failing to see why you need test it always comes back as true on my unpatched system.

$ grep 0412 /System/Library/Extensions/AppleIntelHD5000Graphics.kext/Contents/MacOS/AppleIntelHD5000Graphics

Binary file /System/Library/Extensions/AppleIntelHD5000Graphics.kext/Contents/MacOS/AppleIntelHD5000Graphics matches

$ grep 0412 /System/Library/Extensions/AppleIntelFramebufferAzul.kext/Contents/MacOS/AppleIntelFramebufferAzul

Binary file /System/Library/Extensions/AppleIntelFramebufferAzul.kext/Contents/MacOS/AppleIntelFramebufferAzul matches

$ grep 0412 /System/Library/Extensions/AppleIntelFramebufferAzul.kext/Contents/Info.plist

            <string>0x0c268086 0x0c168086 0x0c068086 0x0d268086 0x0a268086 0x0a2e8086 0x0a168086 0x04268086 0x04168086 0x04068086 0x0d228086 0x04128086</string>

$ grep 0412 /System/Library/Extensions/AppleIntelHD5000Graphics.kext/Contents/Info.plist

            <string>0x00908086 0x00918086 0x00928086 0x0c268086 0x0c168086 0x0c068086 0x0c228086 0x0d268086 0x0a268086 0x0a168086 0x04268086 0x04168086 0x04068086 0x0d228086 0x04128086 0x0a2e8086</string>
 

Unless of course the output is different on something other than a Mavericks system.

[WaldMeister]

This is on Yosemite, converting the 0412 to 0416, the patch works, but if already patched, it should skip  the file, needs to test if patched.

This is not about the grep command! 

[calibre™]

perl will just skip if non found