| // Copyright (c) 2017 Baidu, Inc. All Rights Reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in |
| // the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Baidu, Inc., nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| use sgx_types::*; |
| use io::{self, Error}; |
| use core::cmp; |
| |
| pub struct Stdin(()); |
| pub struct Stdout(()); |
| pub struct Stderr(()); |
| |
| extern "C" { |
| pub fn u_stdin_ocall(result: * mut usize, buf: * mut c_void, nbytes: usize) -> sgx_status_t; |
| pub fn u_stdout_ocall(result: * mut usize, buf: * const c_void, nbytes: usize) -> sgx_status_t; |
| pub fn u_stderr_ocall(result: * mut usize, buf: * const c_void, nbytes: usize) -> sgx_status_t; |
| } |
| |
| fn max_len() -> usize { |
| u32::max_value() as usize |
| } |
| |
| impl Stdin { |
| pub fn new() -> io::Result<Stdin> { Ok(Stdin(())) } |
| |
| pub fn read(&self, data: &mut [u8]) -> io::Result<usize> { |
| |
| let mut result: isize = 0; |
| let status = unsafe { |
| u_stdin_ocall(&mut result as * mut isize as * mut usize, |
| data.as_mut_ptr() as * mut c_void, |
| cmp::min(data.len(), max_len())) |
| }; |
| if status != sgx_status_t::SGX_SUCCESS { |
| return Err(Error::from_sgx_error(status)); |
| } else if result == -1 { |
| return Err(Error::from_raw_os_error(EIO)); |
| } |
| |
| Ok(result as usize) |
| } |
| } |
| |
| impl Stdout { |
| pub fn new() -> io::Result<Stdout> { Ok(Stdout(())) } |
| |
| pub fn write(&self, data: &[u8]) -> io::Result<usize> { |
| |
| let mut result: isize = 0; |
| let status = unsafe { |
| u_stdout_ocall(&mut result as * mut isize as * mut usize, |
| data.as_ptr() as * const c_void, |
| cmp::min(data.len(), max_len())) |
| }; |
| if status != sgx_status_t::SGX_SUCCESS { |
| return Err(Error::from_sgx_error(status)); |
| } else if result == -1 { |
| return Err(Error::from_raw_os_error(EIO)); |
| } |
| |
| Ok(result as usize) |
| } |
| |
| pub fn flush(&self) -> io::Result<()> { |
| Ok(()) |
| } |
| } |
| |
| impl Stderr { |
| pub fn new() -> io::Result<Stderr> { Ok(Stderr(())) } |
| |
| pub fn write(&self, data: &[u8]) -> io::Result<usize> { |
| |
| let mut result: isize = 0; |
| let status = unsafe { |
| u_stderr_ocall(&mut result as * mut isize as * mut usize, |
| data.as_ptr() as * const c_void, |
| cmp::min(data.len(), max_len())) |
| }; |
| if status != sgx_status_t::SGX_SUCCESS { |
| return Err(Error::from_sgx_error(status)); |
| } else if result == -1 { |
| return Err(Error::from_raw_os_error(EIO)); |
| } |
| |
| Ok(result as usize) |
| } |
| |
| pub fn flush(&self) -> io::Result<()> { |
| Ok(()) |
| } |
| } |
| |
| // FIXME: right now this raw stderr handle is used in a few places because |
| // std::io::stderr_raw isn't exposed, but once that's exposed this impl |
| // should go away |
| impl io::Write for Stderr { |
| fn write(&mut self, data: &[u8]) -> io::Result<usize> { |
| Stderr::write(self, data) |
| } |
| |
| fn flush(&mut self) -> io::Result<()> { |
| Stderr::flush(self) |
| } |
| } |
| |
| pub const EBADF_ERR: i32 = EBADF; |
| pub const STDIN_BUF_SIZE: usize = ::sys_common::io::DEFAULT_BUF_SIZE; |