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Suppose process A blocks SIGINT using sigprocmask. While it's blocked, process B sends SIGINT to process A. Later, process A unblocks SIGINT. What will happen

Suppose process A blocks SIGINT using sigprocmask. While it's blocked, process B sends SIGINT to process A. Later, process A unblocks SIGINT. What will happen

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Suppose process A blocks SIGINT using sigprocmask. While it's blocked, process B sends SIGINT to process A. Later, process A unblocks SIGINT. What will happen? (choose one)

  1. A receives SIGINT when B sends it, since SIGINT can't be blocked
  2. A receives SIGINT when it unblocks SIGINT
  3. A never receives SIGINT, since it was blocked when B sent it
  4. A crashes when B tries to send SIGINT
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