C++ (Cpp) open_on_dev_null_if_closed示例

示例#1

/**
 * Configures the standard I/O file descriptors for subsequent execution of
 * child processes. The standard input, output, and error file descriptors are
 * redirected to `/dev/null` if they are closed to prevent child processes that
 * mistakenly write to them from misbehaving.
 *
 * @retval  0  Success
 * @retval -1  Failure. log_add() called.
 */
static int configure_stdio_file_descriptors(void)
{
    int status = open_on_dev_null_if_closed(STDIN_FILENO, O_RDONLY);
    if (status == 0) {
        status = open_on_dev_null_if_closed(STDOUT_FILENO, O_WRONLY);
        if (status == 0)
            status = open_on_dev_null_if_closed(STDERR_FILENO, O_RDWR);
    }
    return status;
}

示例#2

文件： ldmfork_test.c 项目： Unidata/LDM

static void test_open_on_dev_null_if_closed(
    void)
{
    int status = close(STDERR_FILENO);
    CU_ASSERT_EQUAL_FATAL(status, 0);
    status = open_on_dev_null_if_closed(STDERR_FILENO, O_RDWR);
    CU_ASSERT_EQUAL_FATAL(status, 0);
    CU_ASSERT_FALSE_FATAL(log_is_stderr_useful());
    CU_ASSERT_TRUE_FATAL(fcntl(STDERR_FILENO, F_GETFD) >= 0);
}