Enrico Fraccaroli
53 lines
1.4 KiB
C
53 lines
1.4 KiB
C
/// @file t_siginfo.c
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/// @brief
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/// @copyright (c) 2014-2023 This file is distributed under the MIT License.
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/// See LICENSE.md for details.
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#include <sys/unistd.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <strerror.h>
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#include <sys/wait.h>
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#include <time.h>
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void sig_handler_info(int sig, siginfo_t *siginfo)
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{
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printf("handler(%d, %p) : Starting handler.\n", sig, siginfo);
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if (sig == SIGFPE) {
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printf("handler(%d, %p) : Correct signal.\n", sig, siginfo);
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printf("handler(%d, %p) : Code : %d\n", sig, siginfo, siginfo->si_code);
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printf("handler(%d, %p) : Exiting\n", sig, siginfo);
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exit(1);
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} else {
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printf("handler(%d, %p) : Wrong signal.\n", sig, siginfo);
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}
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printf("handler(%d, %p) : Ending handler.\n", sig, siginfo);
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}
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int main(int argc, char *argv[])
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{
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sigaction_t action;
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memset(&action, 0, sizeof(action));
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action.sa_handler = (sighandler_t)sig_handler_info;
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action.sa_flags = SA_SIGINFO;
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if (sigaction(SIGFPE, &action, NULL) == -1) {
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printf("Failed to set signal handler (%s).\n", SIGFPE, strerror(errno));
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return EXIT_FAILURE;
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}
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printf("Diving by zero (unrecoverable)...\n");
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// Should trigger ALU error, fighting the compiler...
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int d = 1, e = 1;
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while (1) {
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d /= e;
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e -= 1;
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}
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printf("d: %d, e: %d\n", d, e);
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return EXIT_SUCCESS;
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}
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