Auto merge of #48806 - alexcrichton:rollup, r=alexcrichton

Rollup of 9 pull requests

- Successful merges: #48511, #48549, #48618, #48624, #48651, #48698, #48778, #48787, #48802
- Failed merges: #48669, #48710

6 files changed, 64 insertions, 3 deletions

diff --git a/src/libstd/sys/cloudabi/shims/process.rs b/src/libstd/sys/cloudabi/shims/process.rs
index 52e8c82e2b2..fcd40c15c17 100644
--- a/src/libstd/sys/cloudabi/shims/process.rs
+++ b/src/libstd/sys/cloudabi/shims/process.rs
@@ -126,6 +126,18 @@ impl fmt::Display for ExitStatus {
     }
 }
 
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
+pub struct ExitCode(bool);
+
+impl ExitCode {
+    pub const SUCCESS: ExitCode = ExitCode(false);
+    pub const FAILURE: ExitCode = ExitCode(true);
+
+    pub fn as_i32(&self) -> i32 {
+        self.0 as i32
+    }
+}
+
 pub struct Process(Void);
 
 impl Process {
diff --git a/src/libstd/sys/redox/process.rs b/src/libstd/sys/redox/process.rs
index 3fd54973896..d0b94e14f54 100644
--- a/src/libstd/sys/redox/process.rs
+++ b/src/libstd/sys/redox/process.rs
@@ -13,6 +13,7 @@ use ffi::OsStr;
 use os::unix::ffi::OsStrExt;
 use fmt;
 use io::{self, Error, ErrorKind};
+use libc::{EXIT_SUCCESS, EXIT_FAILURE};
 use path::{Path, PathBuf};
 use sys::fd::FileDesc;
 use sys::fs::{File, OpenOptions};
@@ -480,6 +481,18 @@ impl fmt::Display for ExitStatus {
     }
 }
 
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
+pub struct ExitCode(u8);
+
+impl ExitCode {
+    pub const SUCCESS: ExitCode = ExitCode(EXIT_SUCCESS as _);
+    pub const FAILURE: ExitCode = ExitCode(EXIT_FAILURE as _);
+
+    pub fn as_i32(&self) -> i32 {
+        self.0 as i32
+    }
+}
+
 /// The unique id of the process (this should never be negative).
 pub struct Process {
     pid: usize,
diff --git a/src/libstd/sys/unix/process/mod.rs b/src/libstd/sys/unix/process/mod.rs
index 2a331069bc2..d8ac26c45b1 100644
--- a/src/libstd/sys/unix/process/mod.rs
+++ b/src/libstd/sys/unix/process/mod.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-pub use self::process_common::{Command, ExitStatus, Stdio, StdioPipes};
+pub use self::process_common::{Command, ExitStatus, ExitCode, Stdio, StdioPipes};
 pub use self::process_inner::Process;
 
 mod process_common;
diff --git a/src/libstd/sys/unix/process/process_common.rs b/src/libstd/sys/unix/process/process_common.rs
index 7e057401fab..d0486f06a14 100644
--- a/src/libstd/sys/unix/process/process_common.rs
+++ b/src/libstd/sys/unix/process/process_common.rs
@@ -13,7 +13,7 @@ use os::unix::prelude::*;
 use ffi::{OsString, OsStr, CString, CStr};
 use fmt;
 use io;
-use libc::{self, c_int, gid_t, uid_t, c_char};
+use libc::{self, c_int, gid_t, uid_t, c_char, EXIT_SUCCESS, EXIT_FAILURE};
 use ptr;
 use sys::fd::FileDesc;
 use sys::fs::{File, OpenOptions};
@@ -393,6 +393,18 @@ impl fmt::Display for ExitStatus {
     }
 }
 
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
+pub struct ExitCode(u8);
+
+impl ExitCode {
+    pub const SUCCESS: ExitCode = ExitCode(EXIT_SUCCESS as _);
+    pub const FAILURE: ExitCode = ExitCode(EXIT_FAILURE as _);
+
+    pub fn as_i32(&self) -> i32 {
+        self.0 as i32
+    }
+}
+
 #[cfg(all(test, not(target_os = "emscripten")))]
 mod tests {
     use super::*;
diff --git a/src/libstd/sys/wasm/process.rs b/src/libstd/sys/wasm/process.rs
index f3f5de350f1..433e9cec7c8 100644
--- a/src/libstd/sys/wasm/process.rs
+++ b/src/libstd/sys/wasm/process.rs
@@ -129,6 +129,18 @@ impl fmt::Display for ExitStatus {
     }
 }
 
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
+pub struct ExitCode(bool);
+
+impl ExitCode {
+    pub const SUCCESS: ExitCode = ExitCode(false);
+    pub const FAILURE: ExitCode = ExitCode(true);
+
+    pub fn as_i32(&self) -> i32 {
+        self.0 as i32
+    }
+}
+
 pub struct Process(Void);
 
 impl Process {
diff --git a/src/libstd/sys/windows/process.rs b/src/libstd/sys/windows/process.rs
index c93179869a6..f1ab9c47609 100644
--- a/src/libstd/sys/windows/process.rs
+++ b/src/libstd/sys/windows/process.rs
@@ -18,7 +18,7 @@ use ffi::{OsString, OsStr};
 use fmt;
 use fs;
 use io::{self, Error, ErrorKind};
-use libc::c_void;
+use libc::{c_void, EXIT_SUCCESS, EXIT_FAILURE};
 use mem;
 use os::windows::ffi::OsStrExt;
 use path::Path;
@@ -408,6 +408,18 @@ impl fmt::Display for ExitStatus {
     }
 }
 
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
+pub struct ExitCode(c::DWORD);
+
+impl ExitCode {
+    pub const SUCCESS: ExitCode = ExitCode(EXIT_SUCCESS as _);
+    pub const FAILURE: ExitCode = ExitCode(EXIT_FAILURE as _);
+
+    pub fn as_i32(&self) -> i32 {
+        self.0 as i32
+    }
+}
+
 fn zeroed_startupinfo() -> c::STARTUPINFO {
     c::STARTUPINFO {
         cb: 0,