none/tests/sigprocmask.c

   1 #define _GNU_SOURCE
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <signal.h>
   6
   7 #include <errno.h>
   8
   9 int main() {
  10
  11    sigset_t oldset;
  12
  13    const int TRASH = 123;
  14
  15    // TRASH variable, that represents HOW parameter, should be ignored in this case
  16    // Taken from: http://man7.org/linux/man-pages/man2/sigprocmask.2.html :
  17    //    If set is NULL, then the signal mask is unchanged (i.e., HOW is
  18    //    ignored), but the current value of the signal mask is nevertheless
  19    //    returned in oldset (if it is not NULL).
  20    if (sigprocmask(TRASH, NULL, &oldset) == 0) {
  21        exit(EXIT_FAILURE);
  22    } else {
  23        exit(EXIT_SUCCESS);
  24    }
  25
  26 }