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The Signal Belfry

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Rarity: forgotten

Hung in the tower since the seventies, rung by almost no one.

9 bells on this page

  1. SIG-013 SIGILL Illegal instruction: the CPU read something it doesn't recognize as an order. Program faults forgotten
  2. SIG-015 SIGTRAP The debugger's bell: every breakpoint is a pre-arranged ring. Program faults forgotten
  3. SIG-016 SIGSYS A forbidden system call — nowadays it's seccomp that rings it. Program faults forgotten
  4. SIG-018 SIGVTALRM The alarm clock that only counts the time the process spent on the CPU. Clocks forgotten
  5. SIG-019 SIGPROF The profilers' metronome: a steady tick in CPU time, user plus system. Clocks forgotten
  6. SIG-021 SIGXCPU The CPU limit burst — a warning before the final cut. Resources forgotten
  7. SIG-022 SIGXFSZ The file grew past its allowance; the bell rings at the write. Resources forgotten
  8. SIG-024 SIGUSR2 The second free bell — the one that usually remains without an agreed ring. The user's forgotten
  9. SIG-026 SIGINFO Ctrl+T on the BSDs and macOS: it tells you what the process is doing, interrupting nothing. The user's forgotten