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 #include <assert.h>
  20 #include <fcntl.h>
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <sys/mman.h>
  26 #include <sys/stat.h>
  27 #include <sys/types.h>
  28 #include <unistd.h>
  29
  30 #include <lttng/tracef.h>
  31
  32 const char *str = "test string";
  33
  34 void create_file(const char *path)
  35 {
  36         int ret;
  37
  38         assert(path);
  39
  40         ret = creat(path, S_IRWXU);
  41         if (ret < 0) {
  42                 fprintf(stderr, "Failed to create file %s\n", path);
  43                 return;
  44         }
  45
  46         (void) close(ret);
  47 }
  48
  49 int main(int argc, char **argv)
  50 {
  51         int i;
  52         unsigned int nr_iter = 100;
  53         useconds_t nr_usec = 0;
  54         char *tmp_file_path = NULL;
  55
  56         if (argc >= 2) {
  57                 nr_iter = atoi(argv[1]);
  58         }
  59
  60         if (argc >= 3) {
  61                 /* By default, don't wait unless user specifies. */
  62                 nr_usec = atoi(argv[2]);
  63         }
  64
  65         if (argc >= 4) {
  66                 tmp_file_path = argv[3];
  67         }
  68
  69         for (i = 0; i < nr_iter; i++) {
  70                 tracef("Test message %d with string \"%s\"", i, str);
  71
  72                 /*
  73                  * First loop we create the file if asked to indicate
  74                  * that at least one tracepoint has been hit.
  75                  */
  76                 if (i == 0 && tmp_file_path) {
  77                         create_file(tmp_file_path);
  78                 }
  79                 usleep(nr_usec);
  80         }
  81
  82         return 0;
  83 }