How does the protagonist survive in the hangar?

In The Dog Stars, the protagonist survives in the Colorado airplane hangar by living a solitary life with his dog and a gunman companion he has befriended. The hangar provides shelter and a base for his daily existence in the post-pandemic world. His survival involves maintaining the hangar, flying his old Cessna, and relying on the companionship and protection of the gunman and his dog. The context does not provide detailed specifics on food or other supplies, but the hangar serves as a secure home in the devastated environment.