nullfd 353 tools/perf/tests/builtin-test.c int nullfd = open("/dev/null", O_WRONLY); nullfd 355 tools/perf/tests/builtin-test.c if (nullfd >= 0) { nullfd 359 tools/perf/tests/builtin-test.c dup2(nullfd, STDOUT_FILENO); nullfd 361 tools/perf/tests/builtin-test.c close(nullfd);