tests/utils/testapp/gen-ust-tracef/gen-ust-tracef.c

   1 /*
   2  * Copyright (C) - 2012 David Goulet <dgoulet@efficios.com>
   3  * Copyright (C) - 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *
   5  * This library is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU Lesser General Public License as published by the
   7  * Free Software Foundation; version 2.1 of the License.
   8  *
   9  * This library is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public License
  15  * along with this library; if not, write to the Free Software Foundation,
  16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  17  */
  18
  19 #define _LGPL_SOURCE
  20 #include <assert.h>
  21 #include <fcntl.h>
  22 #include <stdarg.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <sys/mman.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <unistd.h>
  30
  31 #include <lttng/tracef.h>
  32
  33 const char *str = "test string";
  34
  35 void create_file(const char *path)
  36 {
  37         int ret;
  38
  39         assert(path);
  40
  41         ret = creat(path, S_IRWXU);
  42         if (ret < 0) {
  43                 fprintf(stderr, "Failed to create file %s\n", path);
  44                 return;
  45         }
  46
  47         (void) close(ret);
  48 }
  49
  50 int main(int argc, char **argv)
  51 {
  52         int i;
  53         unsigned int nr_iter = 100;
  54         useconds_t nr_usec = 0;
  55         char *tmp_file_path = NULL;
  56
  57         if (argc >= 2) {
  58                 nr_iter = atoi(argv[1]);
  59         }
  60
  61         if (argc >= 3) {
  62                 /* By default, don't wait unless user specifies. */
  63                 nr_usec = atoi(argv[2]);
  64         }
  65
  66         if (argc >= 4) {
  67                 tmp_file_path = argv[3];
  68         }
  69
  70         for (i = 0; i < nr_iter; i++) {
  71                 tracef("Test message %d with string \"%s\"", i, str);
  72
  73                 /*
  74                  * First loop we create the file if asked to indicate
  75                  * that at least one tracepoint has been hit.
  76                  */
  77                 if (i == 0 && tmp_file_path) {
  78                         create_file(tmp_file_path);
  79                 }
  80                 usleep(nr_usec);
  81         }
  82
  83         return 0;
  84 }