Transcription of The Linux Kernel: Signals & Interrupts
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The Linux Kernel: Signals & Interrupts
CS591 (Spring 2001)The Linux kernel : Signals & InterruptsCS591 (Spring 2001)SignalsnIntroduced in UNIX systems to simplify by the kernel to notify processes of system signal is a short message sent to a process, or group of processes, containing the number identifying the data is delivered with traditional defines i/f for queueing& ordering RT Signals w/ arguments. CS591 (Spring 2001)Example SignalsnLinux supports 31 non-real-time Signals . nPOSIX standard defines a range of values for RT Signals :nSIGRTMIN 32 .. SIGRTMAX (_NSIG-1)in <asm-* ># signal NameDefault ActionComment1 SIGHUPA bortHangup terminal or process2 SIGINTA bortKeyboard interrupt (usually Ctrl-C).
CS591 (Spring 2001) Signals n Introduced in UNIX systems to simplify IPC. n Used by the kernel to notify processes of system events. n A signal is a short message sent to a process, or group of processes, containing the number identifying the signal. n No data is delivered with traditional signals. n POSIX.4 defines i/f for queueing & ordering RT …
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