doc/examples/demo-tracelog/demo-vtracelog.c

   1 /*
   2  * Copyright (C) 2020  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; version 2.1 of
   7  * the License.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  17  */
  18
  19 #include <stdarg.h>
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <unistd.h>
  23
  24 #include <lttng/tracelog.h>
  25
  26 void print_err(const char* msg, ...)
  27 {
  28         va_list ap;
  29
  30         va_start(ap, msg);
  31         vtracelog(TRACE_ERR, msg, ap);
  32         va_end(ap);
  33 }
  34
  35 int main(int argc, char **argv)
  36 {
  37         int i;
  38         int delay = 0;
  39         const char *str = "mystring test";
  40         long l = 0x42;
  41
  42         if (argc > 2)
  43                 delay = atoi(argv[1]);
  44
  45         fprintf(stderr, "Demo program starting.\n");
  46
  47         sleep(delay);
  48
  49         fprintf(stderr, "Tracing... ");
  50
  51         for (i = 0; i < 5; i++) {
  52                 print_err("This is a \"%s\" formatted %d error event %lx", str, i, l);
  53         }
  54
  55         fprintf(stderr, " done.\n");
  56         return 0;
  57 }