BozzPrintf

An example on how function interposition can be done.

Step 1

Compile the shared library first.

gcc -Wall -fPIC -shared -o BozzPrintf.so BozzPrintf.c -ldl

Run this with your own C program using the printf/puts function with Shao Wei in it.

# For macos:
DYLD_INSERT_LIBRARIES=BozzPrintf.so DYLD_FORCE_FLAT_NAMESPACE=y ./main

# For Linux:
LD_PRELOAD=BozzPrintf.so ./main