libfaketime modifies the system time for a single application

List of resources related to LD_PRELOAD, a mechanism for changing application behavior at run-time

Inject a shared library (i.e. arbitrary code) into a live linux process, without ptrace

Turn IP sockets into Unix domain sockets

A simple LD_PRELOAD library to disable SSL certificate verification. Inspired by libeatmydata.

LD_PRELOAD rootkit

Hackbrary to Hook and Augment X11 protocol calls

Memstop monitors available memory and waits until a configurable percentage of memory becomes available before allowing a program to start.

LD_PRELOAD library to bypass TLS certificate verification for debugging and testing

Universal extension framework for Linux applications

My Kobo mods/hacks/tools which aren't patches and aren't in koboutils.

A library for creating mods for Kobo's eReader software, Nickel.

Open-source firewall for AI agents. Policy engine that audits and controls what OpenClaw, Claude Code, Cursor, Codex, and any AI tool can do on your machine.

Make programs think their stdout is a tty / terminal.

Override time reporting in Linux processes (accelerate/slowdown games, test code involving timers/delays)

Support fonts with double-width icons in xterm/rxvt-unicode/zsh/vim/…

Proxy protocol v1 and v2 support via an LD_PRELOAD library

ld_preload userland rootkit

A simple Linux in-memory .so loader

Show stack traces from C++ exceptions at run-time without rebuilding target applications

-x-x-x- DO NOT RUN ON PRODUCTION MACHINE -x-x-x- LD_PRELOAD based user-land rootkit for Linux platform.

Shared library implementations that transform the containing process into a shell when loaded (useful for privilege escalation, argument injection, file overwrites, LD_PRELOAD, etc.).

A wrapper that enables TLS support (TLS 1.2 with AES 128 GCM) for existing applications without code change.

redirect file open operations via LD_PRELOAD

LD_PRELOAD for the gopher crowd

all-in collection of productivity scripts, CLI tools, utility libraries, fuse filesystems, and also some stuff

Link to this library and it will log all the LibC functions you are calling and how much time you are spending in them!

force libinput to emulate a middle click when pressing left and right buttons simultaneously

pwnig all the (web)things

An `LD_PRELOAD` hack to make arbitrary programs work with systemd socket activation