Add termios struct for flags (default taken from stty sane/cooked)

Cargo.lock

@@ -183,7 +183,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "pty_driver"
+name = "pty_server"
 version = "0.1.0"
 dependencies = [
  "dev_driver_rpc",

src/main.rs

@@ -1,3 +1,5 @@
+mod termios;
+
 use std::{
     borrow::Cow,
     collections::HashMap,
@@ -8,10 +10,12 @@ use std::{
 
 use parking_lot::{Mutex, RwLock};
 use slab::Slab;
+use termios::Termios;
 
 struct Pty {
     input_buffer: Mutex<Vec<u8>>,
     output_buffer: Mutex<Vec<u8>>,
+    termios: Termios,
 }
 
 impl Pty {
@@ -19,6 +23,7 @@ impl Pty {
         Pty {
             input_buffer: Mutex::new(Vec::new()),
             output_buffer: Mutex::new(Vec::new()),
+            termios: Termios::default(),
         }
     }
 
@@ -31,16 +36,41 @@ impl Pty {
     }
 
     fn write_master(&self, data: &[u8]) -> Result<(), ()> {
+        if !self.termios.cflags.cread {
+            return Ok(())
+        }
         let mut input_buffer = self.input_buffer.lock();
         let mut output_buffer = self.output_buffer.lock();
-        for &byte in data {
+        for &(mut byte) in data {
+            if self.termios.iflags.istrip {
+                byte &= 0x7F;
+            }
+            if byte == b'\r' && self.termios.iflags.igncr {
+                continue;
+            } else if byte == b'\r' && self.termios.iflags.icrnl {
+                byte = b'\n';
+            } else if byte == b'\n' && self.termios.iflags.inlcr {
+                byte = b'\r';
+            }
+            if byte as char == self.termios.verase && self.termios.lflags.icanon {
+                if self.termios.lflags.echoe {
                     output_buffer.push(byte);
-            if byte == 8 {
+                }
                 if input_buffer.last() != Some(&b'\n') {
                     input_buffer.pop();
                 }
+            } else if byte as char == self.termios.vkill && self.termios.lflags.icanon {
+                while input_buffer.last().is_some() && input_buffer.last() != Some(&b'\n') {
+                    if self.termios.lflags.echok {
+                        output_buffer.push(8);
+                    }
+                    input_buffer.pop();
+                }
             } else {
                 input_buffer.push(byte);
+                if self.termios.lflags.echo || (byte == b'\n' && self.termios.lflags.echonl) {
+                    output_buffer.push(byte);
+                }
             }
         }
         Ok(())
@@ -60,7 +90,19 @@ impl Pty {
     }
 
     fn write_slave(&self, data: &[u8]) -> Result<(), ()> {
-        self.output_buffer.lock().extend(data);
+        let mut output_buffer = self.output_buffer.lock();
+        for &byte in data {
+            if self.termios.oflags.opost {
+                if byte == b'\n' && self.termios.oflags.onlcr {
+                    output_buffer.push(b'\r');
+                    output_buffer.push(b'\n');
+                } else if byte == b'\r' && self.termios.oflags.ocrnl {
+                    output_buffer.push(b'\n');
+                } else {
+                    output_buffer.push(byte);
+                }
+            }
+        }
         Ok(())
     }
 }

src/termios.rs

@@ -0,0 +1,212 @@
+#[allow(unused)]
+pub struct Iflags {
+    pub brkint: bool,
+    pub icrnl: bool,
+    pub ignbrk: bool,
+    pub igncr: bool,
+    pub ignpar: bool,
+    pub inlcr: bool,
+    pub inpck: bool,
+    pub istrip: bool,
+    pub ixany: bool,
+    pub ixoff: bool,
+    pub ixon: bool,
+    pub parmark: bool,
+}
+
+impl Default for Iflags {
+    fn default() -> Self {
+        Self {
+            brkint: false,
+            icrnl: true,
+            ignbrk: false,
+            igncr: false,
+            ignpar: true,
+            inlcr: false,
+            inpck: true,
+            istrip: false,
+            ixany: false,
+            ixoff: false,
+            ixon: false,
+            parmark: false,
+        }
+    }
+}
+
+#[allow(unused)]
+pub struct Oflags {
+    pub opost: bool,
+    pub onlcr: bool,
+    pub ocrnl: bool,
+    pub onocr: bool,
+    pub onlret: bool,
+    pub ofdel: bool,
+    pub nldly: NlDelay,
+    pub crdly: CrDelay,
+    pub tabdly: TabDelay,
+    pub bsdly: BsDelay,
+    pub vtdly: VtDelay,
+    pub ffdly: FfDelay,
+}
+
+impl Default for Oflags {
+    fn default() -> Self {
+        Self {
+            opost: true,
+            onlcr: true,
+            ocrnl: false,
+            onocr: false,
+            onlret: false,
+            ofdel: false,
+            nldly: NlDelay::Nl0,
+            crdly: CrDelay::Cr0,
+            tabdly: TabDelay::Tab0,
+            bsdly: BsDelay::Bs0,
+            vtdly: VtDelay::Vt0,
+            ffdly: FfDelay::Ff0,
+        }
+    }
+}
+
+#[allow(unused)]
+pub enum NlDelay {
+    Nl0,
+    Nl1,
+}
+
+#[allow(unused)]
+pub enum CrDelay {
+    Cr0,
+    Cr1,
+    Cr2,
+    Cr3,
+}
+
+#[allow(unused)]
+pub enum TabDelay {
+    Tab0,
+    Tab1,
+    Tab2,
+    Tab3,
+}
+
+#[allow(unused)]
+pub enum BsDelay {
+    Bs0,
+    Bs1,
+}
+
+#[allow(unused)]
+pub enum VtDelay {
+    Vt0,
+    Vt1,
+}
+
+#[allow(unused)]
+pub enum FfDelay {
+    Ff0,
+    Ff1,
+}
+
+#[allow(unused)]
+pub struct Cflags {
+    pub csize: CharSize,
+    pub cstopb: bool,
+    pub cread: bool,
+    pub parenb: bool,
+    pub parodd: bool,
+    pub hupcl: bool,
+    pub clocal: bool,
+}
+
+impl Default for Cflags {
+    fn default() -> Self {
+        Self {
+            csize: CharSize::Cs8,
+            cstopb: false,
+            cread: true,
+            parenb: false,
+            parodd: false,
+            hupcl: true,
+            clocal: false,
+        }
+    }
+}
+
+#[allow(unused)]
+pub enum CharSize {
+    Cs5,
+    Cs6,
+    Cs7,
+    Cs8,
+}
+
+#[allow(unused)]
+pub struct Lflags {
+    pub echo: bool,
+    pub echoe: bool,
+    pub echok: bool,
+    pub echonl: bool,
+    pub icanon: bool,
+    pub iexten: bool,
+    pub isig: bool,
+    pub noflsh: bool,
+    pub tostop: bool,
+}
+
+impl Default for Lflags {
+    fn default() -> Self {
+        Self {
+            echo: true,
+            echoe: true,
+            echok: true,
+            echonl: false,
+            icanon: true,
+            iexten: true,
+            isig: true,
+            noflsh: false,
+            tostop: false,
+        }
+    }
+}
+
+#[allow(unused)]
+pub struct Termios {
+    pub iflags: Iflags,
+    pub oflags: Oflags,
+    pub cflags: Cflags,
+    pub lflags: Lflags,
+    pub veof: char,
+    pub veol: char,
+    pub verase: char,
+    pub vintr: char,
+    pub vkill: char,
+    pub vmin: u32,
+    pub vquit: char,
+    pub vstart: char,
+    pub vstop: char,
+    pub vsusp: char,
+    pub vtime: u32,
+}
+
+impl Default for Termios {
+    fn default() -> Self {
+        Self {
+            iflags: Iflags::default(),
+            oflags: Oflags::default(),
+            cflags: Cflags::default(),
+            lflags: Lflags::default(),
+            veof: '\u{4}', //ctrl-D (EOT)
+            veol: '\n',
+            verase: '\u{8}', //ctrl-H (BS)
+            vintr: '\u{3}',  //ctrl-C (ETX)
+            vkill: '\u{15}', //ctrl-U (NAK)
+            vmin: 0,
+            vquit: '\u{1C}',  //ctrl-\
+            vstart: '\u{11}', // ctrl-S (XONN)
+            vstop: '\u{13}',  // ctrl-Q (XOFF)
+            vsusp: '\u{1A}',  // ctrl-Z (SUB)
+            vtime: 0,
+        }
+    }
+}