#!/bin/bash
# written by jhertz
# 

PLATFORM=`uname -s`


# check that we're on Mac
if [[ ! "$PLATFORM" = "Darwin" ]] ; then
   echo "This script is for Mac OS"
   exit 1
fi

# check if UID == 0
if [[ $EUID -ne 0 ]]; then
   echo "You really should be root to do this"
   exit 1
fi

# check if SIP is disabled
if [[ ! $(csrutil status | grep "disabled") ]]; then
   echo "SIP needs to be disabled"
   exit 1
fi

echo "Okay cool, checks passed"

echo "Installing plist"

cat << EOF > /Library/LaunchDaemons/shm_setup.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
 <key>Label</key>
 <string>shmemsetup</string>
 <key>UserName</key>
 <string>root</string>
 <key>GroupName</key>
 <string>wheel</string>
 <key>ProgramArguments</key>
 <array>
 <string>/usr/sbin/sysctl</string>
 <string>-w</string>
 <string>kern.sysv.shmmax=268435456</string>
 <string>kern.sysv.shmmni=128</string>
 <string>kern.sysv.shmseg=32</string>
 <string>kern.sysv.shmall=65536</string>
  </array>
 <key>KeepAlive</key>
 <false/>
 <key>RunAtLoad</key>
 <true/>
</dict>
</plist>
EOF

echo "Reboot and enjoy your fuzzing"