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Technical Guide to System Calls: Implementation and Signal Handling in Modern OS

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This behavior is important because it allows long-running or indefinitely blocked system calls to be interrupted, giving the process a chance to handle urgent signals. The scheduler eventually selects the process to run again c. The system call handler continues execution Before returning to user space, the kernel checks if signals arrived during the wait: a. The kernel automatically restarts compatible system calls after the signal handler returns The program doesn’t need to handle EINTR errors explicitly

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