047d851fb6
This patch implements the POSIX signal functionality needed to interrupt a running Noux GDB by pressing 'Ctrl-C'. It allows to register a signal handler for the 'SIGINT' signal, which gets executed after 'Ctrl-C' is received from the terminal. With the current state of the implementation, the signal handler only gets executed when the Noux application calls a 'read()', 'write()', 'ftruncate()' or 'select()' syscall. Fixes #923.
57 lines
1018 B
C++
57 lines
1018 B
C++
/*
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* \brief Noux SIGINT handler test
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* \author Christian Prochaska
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* \date 2013-10-17
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*/
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/*
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* Copyright (C) 2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/wait.h>
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void signal_handler(int signal)
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{
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printf("%d: signal handler for signal %d called\n",
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getpid(), signal);
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}
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int main(int argc, char *argv[])
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{
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char c;
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struct sigaction sa;
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memset (&sa, '\0', sizeof(sa));
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sa.sa_handler = signal_handler;
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sigaction(SIGINT, &sa, 0);
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int pid = fork();
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if (pid == 0)
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printf("test ready\n");
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if ((read(0, &c, 1) == -1) && (errno = EINTR))
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printf("%d: 'read()' returned with error EINTR\n", getpid());
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else
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printf("%d: 'read()' returned character 0x = %x\n", getpid(), c);
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if (pid > 0) {
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waitpid(pid, 0, 0);
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printf("test finished\n");
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}
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return 0;
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}
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