third_party/linux-syscall-support/tests/sigaction.c

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#include "test_skel.h"

void test_handler(int sig) {}

int main(int argc, char *argv[]) {
  const size_t kSigsetSize = sizeof(struct kernel_sigset_t);
  struct kernel_sigaction action = {};
  // Invalid signal returns EINVAL.
  assert(sys_rt_sigaction(SIGKILL, &action, NULL, kSigsetSize) == -1);
  assert(errno == EINVAL);

  // Set an action.
  action.sa_handler_ = test_handler;
  action.sa_flags = SA_SIGINFO;
  assert(sys_sigemptyset(&action.sa_mask) == 0);
  assert(sys_sigaddset(&action.sa_mask, SIGPIPE) == 0);
  assert(sys_rt_sigaction(SIGSEGV, &action, NULL, kSigsetSize) == 0);

  // Retrieve the action.
  struct kernel_sigaction old_action = {};
  assert(sys_rt_sigaction(SIGSEGV, NULL, &old_action, kSigsetSize) == 0);
  assert(memcmp(&action, &old_action, sizeof(action)) == 0);

  return 0;
}