../../src/demos/signal.c: In function ‘custom_logger’:
../../src/demos/signal.c:15:5: warning: call to ‘fprintf’ from within signal handler [CWE-479] [-Wanalyzer-unsafe-call-within-signal-handler]
   15 |     fprintf(stderr, "LOG: %s", msg);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  ‘main’: events 1-2
    |
    |   28 | int main(int argc, const char *argv)
    |      |     ^~~~
    |      |     |
    |      |     (1) entry to ‘main’
    |   29 | {
    |   30 |   register_handler ();
    |      |   ~~~~~~~~~~~~~~~~~~~
    |      |   |
    |      |   (2) calling ‘register_handler’ from ‘main’
    |
    +--> ‘register_handler’: events 3-4
           |
           |   23 | static void register_handler ()
           |      |             ^~~~~~~~~~~~~~~~
           |      |             |
           |      |             (3) entry to ‘register_handler’
           |   24 | {
           |   25 |   signal(SIGINT, int_handler);
           |      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
           |      |   |
           |      |   (4) registering ‘int_handler’ as signal handler
           |
  event 5
    |
    |cc1:
    | (5): later on, when the signal is delivered to the process
    |
    +--> ‘int_handler’: events 6-7
           |
           |   18 | static void int_handler(int signum)
           |      |             ^~~~~~~~~~~
           |      |             |
           |      |             (6) entry to ‘int_handler’
           |   19 | {
           |   20 |   custom_logger("got signal");
           |      |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
           |      |   |
           |      |   (7) calling ‘custom_logger’ from ‘int_handler’
           |
           +--> ‘custom_logger’: events 8-11
                  |
                  |   12 | void custom_logger(const char *msg)
                  |      |      ^~~~~~~~~~~~~
                  |      |      |
                  |      |      (8) entry to ‘custom_logger’
                  |   13 | {
                  |   14 |   if (logging)
                  |      |      ~
                  |      |      |
                  |      |      (9) following ‘true’ branch...
                  |   15 |     fprintf(stderr, "LOG: %s", msg);
                  |      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                  |      |     |
                  |      |     (10) ...to here
                  |      |     (11) call to ‘fprintf’ from within signal handler
                  |