Claude Codex Termux

claude-codex-termux

A simple shell script which downloads Claude Code and Codex CLI binaries from their official sources and patches them to run in a Termux environment. Supports both a interactive menu and CLI arguments-based interface. Note that only aarch64 devices are supported.

get started

simplest way (interactive):

bash claude-codex-termux.sh

non-interactive (CLI arguments):

# install both (default)
bash claude-codex-termux.sh install both

# install only one
bash claude-codex-termux.sh install claude
bash claude-codex-termux.sh install codex

# uninstall
bash claude-codex-termux.sh uninstall both
bash claude-codex-termux.sh uninstall claude
bash claude-codex-termux.sh uninstall codex

environment variables

• FORCE_INSTALL_CC_CODEX=1: reinstall even if the version marker already matches the latest upstream version
• CLAUDE_RELEASE_VERSION=2.1.138: install a specific Claude Code release. Defaults to latest.
• CODEX_RELEASE_TAG=rust-vX.Y.Z: pin a specific Codex release tag instead of resolving latest from GitHub
• CODEX_TERMUX_DEFAULT_SANDBOX=preserve: do not add Termux's default --sandbox danger-full-access to the Codex wrapper

what the script does

• Downloads the latest Codex CLI release from GitHub (openai/codex)
• Patches each binary's hardcoded /etc/resolv.conf string to /proc/self/fd/9\0.
• Generates the resolver file from Android's net.dns* system properties, falling back to 1.1.1.1 / 8.8.8.8
• Installs binaries to ~/.local/lib/{claude-code,codex} and wrappers to ~/.local/bin/{claude,codex}
• Makes the Codex wrapper default to --sandbox danger-full-access on Termux, because stock Android does not provide Codex's bubblewrap sandbox prerequisites. Explicit --sandbox / -s arguments are left alone.
• Appends a guarded PATH block to ~/.bashrc, ~/.zshrc, and ~/.config/fish/config.fish