WebApr 10, 2024 · Instead of calling printf() from within your signal handler (bad idea) you could implement a FIFO of messages to be written and check that (calling printf() on non-empty) from your main event loop. (Basically any case where you're going to handle signals in a non-terminating fashion entails implementing one or more event loops to handle the … WebAug 9, 2010 · Rep: I do not know if I will be able to help you too much, but I would suggest that you examine the return value from read (); that is check the value of res. Code: res = read ( fd, resp, 4 ); Since you have the port set up to be non-blocking, it is possible that 'res' is equal to -1 (and errno is equal to EAGAIN).
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WebMay 23, 2006 · By using F_SETSIG with a non-zero value, and setting SA_SIGINFO for the signal handler (see sigaction(2)), extra information about I/O events is passed to the handler in a siginfo_t structure. If the si_code field indicates the source is SI_SIGIO, the si_fd field gives the file descriptor associated with the event. WebOn GNU systems SIGIO will always be generated properly if you successfully set asynchronous mode with fcntl. Macro: int SIGURG ¶ This signal is sent when “urgent” or … can my 1 year old have night terrors
[PATCH][Ada] Add sa_handler_pos to s-linux to handle mipsel-linux
WebJul 21, 2014 · The sigaction() function conforms to IEEE Std 1003.1-1990 (“POSIX.1”). The SA_ONSTACK and SA_RESTART flags are Berkeley extensions, as are the signals SIGTRAP, SIGEMT, SIGBUS, SIGSYS, SIGURG, SIGIO, SIGXCPU, SIGXFSZ, SIGVTALRM, SIGPROF, SIGWINCH, and SIGINFO. Webpike.git/ src/ signal_handler.c > dfa5b392f7d5ec41f77e2a0477fb1f12aae00d2c cb2256: 1995-10-11: Fredrik Hübinette (Hubbe) /*\ 06983f: 1996-09-22: Fredrik Hübinette ... http://yongbingchen.github.io/blog/2013/03/11/sending-a-signal-from-linux-kernel/ fixing an old laptop