SyMon

SyMon is a lightweight, native Linux system monitor and process manager written in C23 with GTK4.

The project targets Ubuntu 24.04 and a small desktop footprint: low idle CPU usage, low memory usage, and no background service or telemetry.

Current Status

The bootstrap milestone provides a GTK4 application shell, CMake build, application metadata, quality tooling configuration, tests, and CI. Metric collectors and process management follow in later milestones.

Build

Install dependencies on Ubuntu 24.04:

sudo apt install build-essential cmake libgtk-4-dev pkg-config

Configure, build, test, and launch:

cmake -S . -B build -DCMAKE_BUILD_TYPE=Debug
cmake --build build
ctest --test-dir build --output-on-failure
./build/symon

Quality Checks

sudo apt install clang-format clang-tidy cppcheck
clang-format --dry-run --Werror $(git ls-files '*.[ch]')
clang-tidy -p build src/app/*.c tests/unit/*.c
cppcheck --enable=warning,style,performance,portability --error-exitcode=1 \
  --suppress=missingIncludeSystem src/ tests/

Sanitizer build:

cmake -S . -B build-asan -DCMAKE_BUILD_TYPE=Debug \
  -DSYMON_ENABLE_ASAN=ON -DSYMON_ENABLE_UBSAN=ON
cmake --build build-asan
ctest --test-dir build-asan --output-on-failure

Privacy

SyMon will not include telemetry. It will write no local logs unless the user enables debug output. Optional SQLite history remains disabled by default.

License

SyMon is licensed under GPL-3.0. See LICENSE.