Enrico Fraccaroli
62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/// @file t_sigfpe.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(int sig)
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{
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printf("handler(%d) : Starting handler.\n", sig);
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if (sig == SIGFPE) {
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printf("handler(%d) : Correct signal. FPE\n", sig);
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printf("handler(%d) : Exiting\n", sig);
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// exit(1);
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} else {
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printf("handler(%d) : Wrong signal.\n", sig);
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}
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printf("handler(%d) : Ending handler.\n", sig);
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}
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long int fact(int n)
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{
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if (n == 0 || n == 1) {
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return 1;
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}
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long int pro = 1;
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while (n != 1) {
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pro *= n--;
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}
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return pro;
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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 = sig_handler;
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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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d /= e;
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e -= 1;
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d /= e;
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e -= 1;
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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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