/* * This file is part of count-f strace test. * * Copyright (c) 2016-2018 Dmitry V. Levin * All rights reserved. * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "tests.h" #include #include #include #include #include #include #include #define N 32 #define P 8 #define T 4 static void * thread(void *arg) { unsigned int i; assert(chdir(".") == 0); for (i = 0; i < N; ++i) { assert(chdir("") == -1); assert(chdir(".") == 0); } return NULL; } static int process(void) { unsigned int i; pthread_t t[T]; for (i = 0; i < T; ++i) { errno = pthread_create(&t[i], NULL, thread, NULL); if (errno) perror_msg_and_fail("pthread_create"); } for (i = 0; i < T; ++i) { void *retval; errno = pthread_join(t[i], &retval); if (errno) perror_msg_and_fail("pthread_join"); } return 0; } int main(void) { unsigned int i; pid_t p[P]; for (i = 0; i < P; ++i) { p[i] = fork(); if (p[i] < 0) perror_msg_and_fail("fork"); if (!p[i]) return process(); } for (i = 0; i < P; ++i) { int s; assert(waitpid(p[i], &s, 0) == p[i]); assert(WIFEXITED(s)); if (WEXITSTATUS(s)) return WEXITSTATUS(s); } return 0; }