Multi-Instance Accessor in C

A simple and efficient C program demonstrating how to manage multiple object instances using ID-based access and POSIX signal handling.

This is not a set system — it allows multiple instances with the same ID.
The first matching instance is returned when queried.

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Features

• Multi-instance registration with dynamic memory.
• ID-based lookup system (no uniqueness enforcement).
• Signal-based runtime testing:
  • SIGUSR1, SIGUSR2, SIGINT (CTRL+C), SIGHUP
• Clean switch-case signal handler (no nested if-else).
• Exit behavior on SIGHUP after displaying associated instance.

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Usage

Compile

gcc multi.c -o multi