signal-test.c

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Author : David Disseldorp
Date : 2019-08-21 01:00:07
Hash : a0276292
Message : sample/signal-test: fix use of uninitialized variable signal_int is uninitialized in the !base error path. Signed-off-by: David Disseldorp <ddiss@samba.org>

sample/signal-test.c

/*
 * Compile with:
 * cc -I/usr/local/include -o signal-test \
 *   signal-test.c -L/usr/local/lib -levent
 */

#include <sys/types.h>

#include <event2/event-config.h>

#include <sys/stat.h>
#ifndef _WIN32
#include <sys/queue.h>
#include <unistd.h>
#include <sys/time.h>
#else
#include <winsock2.h>
#include <windows.h>
#endif
#include <signal.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

#include <event2/event.h>

int called = 0;

static void
signal_cb(evutil_socket_t fd, short event, void *arg)
{
	struct event *signal = arg;

	printf("signal_cb: got signal %d\n", event_get_signal(signal));

	if (called >= 2)
		event_del(signal);

	called++;
}

int
main(int argc, char **argv)
{
	struct event *signal_int = NULL;
	struct event_base* base;
	int ret = 0;
#ifdef _WIN32
	WORD wVersionRequested;
	WSADATA wsaData;

	wVersionRequested = MAKEWORD(2, 2);

	(void) WSAStartup(wVersionRequested, &wsaData);
#endif

	/* Initialize the event library */
	base = event_base_new();
	if (!base) {
		ret = 1;
		goto out;
	}

	/* Initialize one event */
	signal_int = evsignal_new(base, SIGINT, signal_cb, event_self_cbarg());
	if (!signal_int) {
		ret = 2;
		goto out;
	}
	event_add(signal_int, NULL);

	event_base_dispatch(base);

out:
	if (signal_int)
		event_free(signal_int);
	if (base)
		event_base_free(base);
	return ret;
}

kc3-lang/libevent/sample/signal-test.c

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kc3-lang/libevent /sample/signal-test.c