From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on gnuweeb.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=ALL_TRUSTED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NO_DNS_FOR_FROM autolearn=no autolearn_force=no version=3.4.6 Received: from localhost.localdomain (unknown [182.253.183.184]) by gnuweeb.org (Postfix) with ESMTPSA id 1CD0A7E6EE; Sun, 8 Jan 2023 13:59:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gnuweeb.org; s=default; t=1673186360; bh=FDH1SiFwyTAYw73kTXZ3LWXEORDAq51IpBI/AfSBiCw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NpytHYUzml+I6lOZoeqsb+qnJPvs010A+G1N2Z9l8NpQYtjmmimkeEjDJP25fuWTQ zox777FEhhiFuYO4tuPBCojzPKsK8J9abdl29cNZBvhfCwGEVf2TMtV1r7tE6YI1p1 AkB8EbBJ34fFK3w0z+kKCKGQRBIUB3X6vwCqScP8GvMZqZOt3xD1NFYcv+pli4DSGd anXffvFKretW9siunjzWXt+Wl1vg/NctDdzOI9ViOAPUbiqOlPAZ9u7lDLrGYmmdbo pom3VPP3fyGLnM/zO/qVnoiBnqe4pA+m95u/r6L9PlWW9wqsxCSjfGsc88U2FdSvFS ngQzUaHwBUckQ== From: Ammar Faizi To: Willy Tarreau Cc: Ammar Faizi , Shuah Khan , "Paul E. McKenney" , Gilang Fachrezy , Alviro Iskandar Setiawan , GNU/Weeb Mailing List , Linux Kernel Mailing List , Linux Kselftest Mailing List Subject: [PATCH v3 3/5] selftests/nolibc: Add `fork(2)` selftest Date: Sun, 8 Jan 2023 20:59:02 +0700 Message-Id: <20230108135904.851762-4-ammar.faizi@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230108135904.851762-1-ammar.faizi@intel.com> References: <20230108135904.851762-1-ammar.faizi@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit List-Id: From: Ammar Faizi Ensure the fork() function can create a child process. Also, when the child exits, the parent must be able to get the child's exit code via waitpid(). Signed-off-by: Ammar Faizi --- tools/testing/selftests/nolibc/nolibc-test.c | 45 ++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 3a78399f4624..cb6ec9f71aae 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -471,6 +471,50 @@ static int test_getpagesize(void) return !c; } +/* + * Test fork(). + * Make sure the exit code can be read from the parent process. + */ +static int test_fork_and_exit(int expected_code) +{ + int status; + int code; + pid_t ret; + pid_t p; + + p = fork(); + if (p < 0) + return p; + + if (!p) + exit(expected_code); + + do { + ret = waitpid(p, &status, 0); + if (ret < 0) + return ret; + } while (!WIFEXITED(status)); + + code = WEXITSTATUS(status); + if (code != expected_code) { + printf("test_fork_and_exit(): waitpid(): Invalid exit code: %d; expected = %d\n", code, expected_code); + return -1; + } + + return 0; +} + +static int test_fork(void) +{ + int i; + + for (i = 0; i < 255; i++) { + if (test_fork_and_exit(i)) + return -1; + } + return 0; +} + /* Run syscall tests between IDs and . * Return 0 on success, non-zero on failure. */ @@ -523,6 +567,7 @@ int run_syscall(int min, int max) CASE_TEST(dup3_0); tmp = dup3(0, 100, 0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break; CASE_TEST(dup3_m1); tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break; CASE_TEST(execve_root); EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break; + CASE_TEST(fork); EXPECT_SYSZR(1, test_fork()); break; CASE_TEST(getdents64_root); EXPECT_SYSNE(1, test_getdents64("/"), -1); break; CASE_TEST(getdents64_null); EXPECT_SYSER(1, test_getdents64("/dev/null"), -1, ENOTDIR); break; CASE_TEST(gettimeofday_null); EXPECT_SYSZR(1, gettimeofday(NULL, NULL)); break; -- Ammar Faizi