[lttng-ust.git] / doc / examples / demo-tracelog / demo-vtracelog.c

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

#include <lttng/tracelog.h>

static
void print_err(const char* msg, ...)
	__attribute__((format(printf, 1, 2)));
static
void print_err(const char* msg, ...)
{
	va_list ap;

	va_start(ap, msg);
	lttng_ust_vtracelog(LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR, msg, ap);
	va_end(ap);
}

int main(int argc, char **argv)
{
	int i;
	int delay = 0;
	const char *str = "mystring test";
	long l = 0x42;

	if (argc > 2)
		delay = atoi(argv[1]);

	fprintf(stderr, "Demo program starting.\n");

	sleep(delay);

	fprintf(stderr, "Tracing... ");

	for (i = 0; i < 5; i++) {
		print_err("This is a \"%s\" formatted %d error event %lx", str, i, l);
	}

	fprintf(stderr, " done.\n");
	return 0;
}
Commit	Line	Data
	1	/*
	2	* SPDX-License-Identifier: LGPL-2.1-only
	3	*
	4	* Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	*/
	6
	7	#include <stdarg.h>
	8	#include <stdlib.h>
	9	#include <stdio.h>
	10	#include <unistd.h>
	11
	12	#include <lttng/tracelog.h>
	13
	14	static
	15	void print_err(const char* msg, ...)
	16	__attribute__((format(printf, 1, 2)));
	17	static
	18	void print_err(const char* msg, ...)
	19	{
	20	va_list ap;
	21
	22	va_start(ap, msg);
	23	lttng_ust_vtracelog(LTTNG_UST_TRACEPOINT_LOGLEVEL_ERR, msg, ap);
	24	va_end(ap);
	25	}
	26
	27	int main(int argc, char **argv)
	28	{
	29	int i;
	30	int delay = 0;
	31	const char *str = "mystring test";
	32	long l = 0x42;
	33
	34	if (argc > 2)
	35	delay = atoi(argv[1]);
	36
	37	fprintf(stderr, "Demo program starting.\n");
	38
	39	sleep(delay);
	40
	41	fprintf(stderr, "Tracing... ");
	42
	43	for (i = 0; i < 5; i++) {
	44	print_err("This is a \"%s\" formatted %d error event %lx", str, i, l);
	45	}
	46
	47	fprintf(stderr, " done.\n");
	48	return 0;
	49	}