Linux Function Hooking

Prompts and answers

• What is the name of the dynamic linker/loader on linux?
  ld.so, ld-linux.so
• What environment variable let's you load your own shared library before all others?
  LD_PRELOAD
• Which file contains a whitespace-separated list of ELF shared objects to be loaded before running a program?
  /etc/ld.so.preload
• If both the environment variable and the file are employed, the libraries specified by which would be loaded first?
  Environment Variable
• How many arguments does write() take?
  3
• Which feature test macro must be defined in order to obtain the definitions of RTLD_NEXT from ?
  _GNU_SOURCE
• When compiling our code to produce a Shared Object, which flag is used to create position independent code?
  -fPIC
• Can hooking libc functions affect the behavior of Python3? (Yay/Nay)
  Yay
• There are two mandatory fields of a dirent structure. One is d_name, and the other one is?
  d_ino