Delete ctr-std to use my fork of the rust repo instead

1 files changed, 0 insertions, 405 deletions

diff --git a/ctr-std/src/sys/unix/process/process_unix.rs b/ctr-std/src/sys/unix/process/process_unix.rs
deleted file mode 100644
index 9d6d607..0000000
--- a/ctr-std/src/sys/unix/process/process_unix.rs
+++ /dev/null
@@ -1,405 +0,0 @@
-// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use io::{self, Error, ErrorKind};
-use libc::{self, c_int, gid_t, pid_t, uid_t};
-use ptr;
-
-use sys::cvt;
-use sys::process::process_common::*;
-
-////////////////////////////////////////////////////////////////////////////////
-// Command
-////////////////////////////////////////////////////////////////////////////////
-
-impl Command {
-    pub fn spawn(&mut self, default: Stdio, needs_stdin: bool)
-                 -> io::Result<(Process, StdioPipes)> {
-        use sys;
-
-        const CLOEXEC_MSG_FOOTER: &'static [u8] = b"NOEX";
-
-        let envp = self.capture_env();
-
-        if self.saw_nul() {
-            return Err(io::Error::new(ErrorKind::InvalidInput,
-                                      "nul byte found in provided data"));
-        }
-
-        let (ours, theirs) = self.setup_io(default, needs_stdin)?;
-
-        if let Some(ret) = self.posix_spawn(&theirs, envp.as_ref())? {
-            return Ok((ret, ours))
-        }
-
-        let (input, output) = sys::pipe::anon_pipe()?;
-
-        let pid = unsafe {
-            match cvt(libc::fork())? {
-                0 => {
-                    drop(input);
-                    let err = self.do_exec(theirs, envp.as_ref());
-                    let errno = err.raw_os_error().unwrap_or(libc::EINVAL) as u32;
-                    let bytes = [
-                        (errno >> 24) as u8,
-                        (errno >> 16) as u8,
-                        (errno >>  8) as u8,
-                        (errno >>  0) as u8,
-                        CLOEXEC_MSG_FOOTER[0], CLOEXEC_MSG_FOOTER[1],
-                        CLOEXEC_MSG_FOOTER[2], CLOEXEC_MSG_FOOTER[3]
-                    ];
-                    // pipe I/O up to PIPE_BUF bytes should be atomic, and then
-                    // we want to be sure we *don't* run at_exit destructors as
-                    // we're being torn down regardless
-                    assert!(output.write(&bytes).is_ok());
-                    libc::_exit(1)
-                }
-                n => n,
-            }
-        };
-
-        let mut p = Process { pid: pid, status: None };
-        drop(output);
-        let mut bytes = [0; 8];
-
-        // loop to handle EINTR
-        loop {
-            match input.read(&mut bytes) {
-                Ok(0) => return Ok((p, ours)),
-                Ok(8) => {
-                    assert!(combine(CLOEXEC_MSG_FOOTER) == combine(&bytes[4.. 8]),
-                            "Validation on the CLOEXEC pipe failed: {:?}", bytes);
-                    let errno = combine(&bytes[0.. 4]);
-                    assert!(p.wait().is_ok(),
-                            "wait() should either return Ok or panic");
-                    return Err(Error::from_raw_os_error(errno))
-                }
-                Err(ref e) if e.kind() == ErrorKind::Interrupted => {}
-                Err(e) => {
-                    assert!(p.wait().is_ok(),
-                            "wait() should either return Ok or panic");
-                    panic!("the CLOEXEC pipe failed: {:?}", e)
-                },
-                Ok(..) => { // pipe I/O up to PIPE_BUF bytes should be atomic
-                    assert!(p.wait().is_ok(),
-                            "wait() should either return Ok or panic");
-                    panic!("short read on the CLOEXEC pipe")
-                }
-            }
-        }
-
-        fn combine(arr: &[u8]) -> i32 {
-            let a = arr[0] as u32;
-            let b = arr[1] as u32;
-            let c = arr[2] as u32;
-            let d = arr[3] as u32;
-
-            ((a << 24) | (b << 16) | (c << 8) | (d << 0)) as i32
-        }
-    }
-
-    pub fn exec(&mut self, default: Stdio) -> io::Error {
-        let envp = self.capture_env();
-
-        if self.saw_nul() {
-            return io::Error::new(ErrorKind::InvalidInput,
-                                  "nul byte found in provided data")
-        }
-
-        match self.setup_io(default, true) {
-            Ok((_, theirs)) => unsafe { self.do_exec(theirs, envp.as_ref()) },
-            Err(e) => e,
-        }
-    }
-
-    // And at this point we've reached a special time in the life of the
-    // child. The child must now be considered hamstrung and unable to
-    // do anything other than syscalls really. Consider the following
-    // scenario:
-    //
-    //      1. Thread A of process 1 grabs the malloc() mutex
-    //      2. Thread B of process 1 forks(), creating thread C
-    //      3. Thread C of process 2 then attempts to malloc()
-    //      4. The memory of process 2 is the same as the memory of
-    //         process 1, so the mutex is locked.
-    //
-    // This situation looks a lot like deadlock, right? It turns out
-    // that this is what pthread_atfork() takes care of, which is
-    // presumably implemented across platforms. The first thing that
-    // threads to *before* forking is to do things like grab the malloc
-    // mutex, and then after the fork they unlock it.
-    //
-    // Despite this information, libnative's spawn has been witnessed to
-    // deadlock on both macOS and FreeBSD. I'm not entirely sure why, but
-    // all collected backtraces point at malloc/free traffic in the
-    // child spawned process.
-    //
-    // For this reason, the block of code below should contain 0
-    // invocations of either malloc of free (or their related friends).
-    //
-    // As an example of not having malloc/free traffic, we don't close
-    // this file descriptor by dropping the FileDesc (which contains an
-    // allocation). Instead we just close it manually. This will never
-    // have the drop glue anyway because this code never returns (the
-    // child will either exec() or invoke libc::exit)
-    unsafe fn do_exec(
-        &mut self,
-        stdio: ChildPipes,
-        maybe_envp: Option<&CStringArray>
-    ) -> io::Error {
-        use sys::{self, cvt_r};
-
-        macro_rules! t {
-            ($e:expr) => (match $e {
-                Ok(e) => e,
-                Err(e) => return e,
-            })
-        }
-
-        if let Some(fd) = stdio.stdin.fd() {
-            t!(cvt_r(|| libc::dup2(fd, libc::STDIN_FILENO)));
-        }
-        if let Some(fd) = stdio.stdout.fd() {
-            t!(cvt_r(|| libc::dup2(fd, libc::STDOUT_FILENO)));
-        }
-        if let Some(fd) = stdio.stderr.fd() {
-            t!(cvt_r(|| libc::dup2(fd, libc::STDERR_FILENO)));
-        }
-
-        if cfg!(not(any(target_os = "l4re"))) {
-            if let Some(u) = self.get_gid() {
-                t!(cvt(libc::setgid(u as gid_t)));
-            }
-            if let Some(u) = self.get_uid() {
-                // When dropping privileges from root, the `setgroups` call
-                // will remove any extraneous groups. If we don't call this,
-                // then even though our uid has dropped, we may still have
-                // groups that enable us to do super-user things. This will
-                // fail if we aren't root, so don't bother checking the
-                // return value, this is just done as an optimistic
-                // privilege dropping function.
-                let _ = libc::setgroups(0, ptr::null());
-
-                t!(cvt(libc::setuid(u as uid_t)));
-            }
-        }
-        if let Some(ref cwd) = *self.get_cwd() {
-            t!(cvt(libc::chdir(cwd.as_ptr())));
-        }
-        if let Some(envp) = maybe_envp {
-            *sys::os::environ() = envp.as_ptr();
-        }
-
-        // emscripten has no signal support.
-        #[cfg(not(any(target_os = "emscripten")))]
-        {
-            use mem;
-            // Reset signal handling so the child process starts in a
-            // standardized state. libstd ignores SIGPIPE, and signal-handling
-            // libraries often set a mask. Child processes inherit ignored
-            // signals and the signal mask from their parent, but most
-            // UNIX programs do not reset these things on their own, so we
-            // need to clean things up now to avoid confusing the program
-            // we're about to run.
-            let mut set: libc::sigset_t = mem::uninitialized();
-            if cfg!(target_os = "android") {
-                // Implementing sigemptyset allow us to support older Android
-                // versions. See the comment about Android and sig* functions in
-                // process_common.rs
-                libc::memset(&mut set as *mut _ as *mut _,
-                             0,
-                             mem::size_of::<libc::sigset_t>());
-            } else {
-                t!(cvt(libc::sigemptyset(&mut set)));
-            }
-            t!(cvt(libc::pthread_sigmask(libc::SIG_SETMASK, &set,
-                                         ptr::null_mut())));
-            let ret = sys::signal(libc::SIGPIPE, libc::SIG_DFL);
-            if ret == libc::SIG_ERR {
-                return io::Error::last_os_error()
-            }
-        }
-
-        for callback in self.get_closures().iter_mut() {
-            t!(callback());
-        }
-
-        libc::execvp(self.get_argv()[0], self.get_argv().as_ptr());
-        io::Error::last_os_error()
-    }
-
-    #[cfg(not(any(target_os = "macos", target_os = "freebsd",
-                  all(target_os = "linux", target_env = "gnu"))))]
-    fn posix_spawn(&mut self, _: &ChildPipes, _: Option<&CStringArray>)
-        -> io::Result<Option<Process>>
-    {
-        Ok(None)
-    }
-
-    // Only support platforms for which posix_spawn() can return ENOENT
-    // directly.
-    #[cfg(any(target_os = "macos", target_os = "freebsd",
-              all(target_os = "linux", target_env = "gnu")))]
-    fn posix_spawn(&mut self, stdio: &ChildPipes, envp: Option<&CStringArray>)
-        -> io::Result<Option<Process>>
-    {
-        use mem;
-        use sys;
-
-        if self.get_cwd().is_some() ||
-            self.get_gid().is_some() ||
-            self.get_uid().is_some() ||
-            self.env_saw_path() ||
-            self.get_closures().len() != 0 {
-            return Ok(None)
-        }
-
-        // Only glibc 2.24+ posix_spawn() supports returning ENOENT directly.
-        #[cfg(all(target_os = "linux", target_env = "gnu"))]
-        {
-            if let Some(version) = sys::os::glibc_version() {
-                if version < (2, 24) {
-                    return Ok(None)
-                }
-            } else {
-                return Ok(None)
-            }
-        }
-
-        let mut p = Process { pid: 0, status: None };
-
-        struct PosixSpawnFileActions(libc::posix_spawn_file_actions_t);
-
-        impl Drop for PosixSpawnFileActions {
-            fn drop(&mut self) {
-                unsafe {
-                    libc::posix_spawn_file_actions_destroy(&mut self.0);
-                }
-            }
-        }
-
-        struct PosixSpawnattr(libc::posix_spawnattr_t);
-
-        impl Drop for PosixSpawnattr {
-            fn drop(&mut self) {
-                unsafe {
-                    libc::posix_spawnattr_destroy(&mut self.0);
-                }
-            }
-        }
-
-        unsafe {
-            let mut file_actions = PosixSpawnFileActions(mem::uninitialized());
-            let mut attrs = PosixSpawnattr(mem::uninitialized());
-
-            libc::posix_spawnattr_init(&mut attrs.0);
-            libc::posix_spawn_file_actions_init(&mut file_actions.0);
-
-            if let Some(fd) = stdio.stdin.fd() {
-                cvt(libc::posix_spawn_file_actions_adddup2(&mut file_actions.0,
-                                                           fd,
-                                                           libc::STDIN_FILENO))?;
-            }
-            if let Some(fd) = stdio.stdout.fd() {
-                cvt(libc::posix_spawn_file_actions_adddup2(&mut file_actions.0,
-                                                           fd,
-                                                           libc::STDOUT_FILENO))?;
-            }
-            if let Some(fd) = stdio.stderr.fd() {
-                cvt(libc::posix_spawn_file_actions_adddup2(&mut file_actions.0,
-                                                           fd,
-                                                           libc::STDERR_FILENO))?;
-            }
-
-            let mut set: libc::sigset_t = mem::uninitialized();
-            cvt(libc::sigemptyset(&mut set))?;
-            cvt(libc::posix_spawnattr_setsigmask(&mut attrs.0,
-                                                 &set))?;
-            cvt(libc::sigaddset(&mut set, libc::SIGPIPE))?;
-            cvt(libc::posix_spawnattr_setsigdefault(&mut attrs.0,
-                                                    &set))?;
-
-            let flags = libc::POSIX_SPAWN_SETSIGDEF |
-                libc::POSIX_SPAWN_SETSIGMASK;
-            cvt(libc::posix_spawnattr_setflags(&mut attrs.0, flags as _))?;
-
-            let envp = envp.map(|c| c.as_ptr())
-                .unwrap_or(*sys::os::environ() as *const _);
-            let ret = libc::posix_spawnp(
-                &mut p.pid,
-                self.get_argv()[0],
-                &file_actions.0,
-                &attrs.0,
-                self.get_argv().as_ptr() as *const _,
-                envp as *const _,
-            );
-            if ret == 0 {
-                Ok(Some(p))
-            } else {
-                Err(io::Error::from_raw_os_error(ret))
-            }
-        }
-    }
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// Processes
-////////////////////////////////////////////////////////////////////////////////
-
-/// The unique id of the process (this should never be negative).
-pub struct Process {
-    pid: pid_t,
-    status: Option<ExitStatus>,
-}
-
-impl Process {
-    pub fn id(&self) -> u32 {
-        self.pid as u32
-    }
-
-    pub fn kill(&mut self) -> io::Result<()> {
-        // If we've already waited on this process then the pid can be recycled
-        // and used for another process, and we probably shouldn't be killing
-        // random processes, so just return an error.
-        if self.status.is_some() {
-            Err(Error::new(ErrorKind::InvalidInput,
-                           "invalid argument: can't kill an exited process"))
-        } else {
-            cvt(unsafe { libc::kill(self.pid, libc::SIGKILL) }).map(|_| ())
-        }
-    }
-
-    pub fn wait(&mut self) -> io::Result<ExitStatus> {
-        use sys::cvt_r;
-        if let Some(status) = self.status {
-            return Ok(status)
-        }
-        let mut status = 0 as c_int;
-        cvt_r(|| unsafe { libc::waitpid(self.pid, &mut status, 0) })?;
-        self.status = Some(ExitStatus::new(status));
-        Ok(ExitStatus::new(status))
-    }
-
-    pub fn try_wait(&mut self) -> io::Result<Option<ExitStatus>> {
-        if let Some(status) = self.status {
-            return Ok(Some(status))
-        }
-        let mut status = 0 as c_int;
-        let pid = cvt(unsafe {
-            libc::waitpid(self.pid, &mut status, libc::WNOHANG)
-        })?;
-        if pid == 0 {
-            Ok(None)
-        } else {
-            self.status = Some(ExitStatus::new(status));
-            Ok(Some(ExitStatus::new(status)))
-        }
-    }
-}