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https://github.com/ibm-s390-linux/s390-tools.git
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5eace91ee7
Signed-off-by: Philipp Rudo <prudo@linux.ibm.com> Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
/**
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* util_panic_example - Example program for util_panic
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*
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* Copyright IBM Corp. 2016, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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//! [code]
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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#include "lib/zt_common.h"
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#include "lib/util_panic.h"
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/* Make functions noinline to have a nice backtrace */
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/*
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* Test util_panic()
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*/
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__noinline void panic_test_func(void)
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{
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fprintf(stderr, "Testing util_panic() now\n");
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util_panic("Adieu beautiful world ...\n");
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fprintf(stderr, "You should not see this\n");
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}
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/*
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* Test util_panic() with errno handling
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*/
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__noinline void panic_errno_test_func(void)
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{
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const char *file = "i_do_not_exist";
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if (fopen("i_do_not_exist", "r") == NULL) {
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util_panic("Open file \"%s\" failed: %s\n",
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file, strerror(errno));
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}
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fprintf(stderr, "You should not see this\n");
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}
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/*
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* Test util_assert()
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*/
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__noinline void assert_test_func(void)
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{
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char *drink_actual = "beer";
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fprintf(stderr, "Testing util_assert() now\n");
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util_assert(strcmp(drink_actual, "water") == 0,
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"We expected \"%s\" but got \"%s\"\n",
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"water", drink_actual);
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fprintf(stderr, "You should not see this\n");
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}
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/*
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* Demonstrate util_panic() and util_assert()
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*/
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int main(int argc, char *argv[])
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{
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struct rlimit rlim_unlimited = {-1, -1};
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struct rlimit rlim_zero = {0, 0};
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if (argc != 2)
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goto fail;
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if (strcmp(argv[1], "util_panic") == 0) {
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fprintf(stderr, "Disable core files: ulimit -c 0\n");
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setrlimit(RLIMIT_CORE, &rlim_zero);
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/* Do the panic */
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panic_test_func();
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} else if (strcmp(argv[1], "util_panic_errno") == 0) {
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setrlimit(RLIMIT_CORE, &rlim_unlimited);
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/* Do the panic */
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panic_errno_test_func();
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} else if (strcmp(argv[1], "util_assert") == 0) {
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fprintf(stderr, "Enable core files: ulimit -c unlimited\n");
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setrlimit(RLIMIT_CORE, &rlim_unlimited);
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/* Do the assertion */
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assert_test_func();
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}
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fail:
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fprintf(stderr, "Usage: %s util_panic|util_panic_errno|util_assert\n", argv[0]);
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return EXIT_FAILURE;
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}
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//! [code]
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