Add a test case of pipe that sends and receives message in a single process. Suggested-by: Thomas Weißschuh <thomas@xxxxxxxx> Suggested-by: Willy Tarreau <w@xxxxxx> Link: https://lore.kernel.org/all/c5de2d13-3752-4e1b-90d9-f58cca99c702@xxxxxxxx/ Signed-off-by: Yuan Tan <tanyuan@xxxxxxxxxxx> --- tools/testing/selftests/nolibc/nolibc-test.c | 22 ++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 03b1d30f5507..e5667fa3cf0a 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -767,6 +767,27 @@ int test_mmap_munmap(void) return ret; } +static int test_pipe(void) +{ + const char *const msg = "hello, nolibc"; + int pipefd[2]; + char buf[32]; + ssize_t len; + + if (pipe(pipefd) == -1) + return 1; + + write(pipefd[1], msg, strlen(msg)); + close(pipefd[1]); + len = read(pipefd[0], buf, sizeof(buf)); + close(pipefd[0]); + + if (len != strlen(msg)) + return 1; + + return !!memcmp(buf, msg, len); +} + /* Run syscall tests between IDs <min> and <max>. * Return 0 on success, non-zero on failure. @@ -851,6 +872,7 @@ int run_syscall(int min, int max) CASE_TEST(mmap_munmap_good); EXPECT_SYSZR(1, test_mmap_munmap()); break; CASE_TEST(open_tty); EXPECT_SYSNE(1, tmp = open("/dev/null", 0), -1); if (tmp != -1) close(tmp); break; CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", 0), -1, ENOENT); if (tmp != -1) close(tmp); break; + CASE_TEST(pipe); EXPECT_SYSZR(1, test_pipe()); break; CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break; CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break; CASE_TEST(poll_fault); EXPECT_SYSER(1, poll((void *)1, 1, 0), -1, EFAULT); break; -- 2.34.1
