Auto merge of #1332 - redox-os:redox-unix, r=gnzlbg

redox: convert to target_family unix

This is the first step to supporting https://github.com/rust-lang/rust/issues/60139.

In order to have a smooth transition, there will need to be a change made in rust at the same time, switching Redox over to the unix target family. See https://github.com/rust-lang/rust/pull/60547

7 files changed, 604 insertions, 549 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 426b684962..baf6324341 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -26,6 +26,7 @@
 #![deny(missing_copy_implementations, safe_packed_borrows)]
 #![no_std]
 #![cfg_attr(feature = "rustc-dep-of-std", no_core)]
+#![cfg_attr(target_os = "redox", feature(static_nobundle))]
 
 #[macro_use]
 mod macros;
@@ -91,9 +92,6 @@ cfg_if! {
     if #[cfg(windows)] {
         mod windows;
         pub use windows::*;
-    } else if #[cfg(target_os = "redox")] {
-        mod redox;
-        pub use redox::*;
     } else if #[cfg(target_os = "cloudabi")] {
         mod cloudabi;
         pub use cloudabi::*;
diff --git a/src/redox/align.rs b/src/redox/align.rs
deleted file mode 100644
index 4fdba9a6ab..0000000000
--- a/src/redox/align.rs
+++ /dev/null
@@ -1,6 +0,0 @@
-s! {
-    #[repr(align(4))]
-    pub struct in6_addr {
-        pub s6_addr: [u8; 16],
-    }
-}
diff --git a/src/redox/mod.rs b/src/redox/mod.rs
deleted file mode 100644
index ac0ae00bce..0000000000
--- a/src/redox/mod.rs
+++ /dev/null
@@ -1,416 +0,0 @@
-pub type int8_t = i8;
-pub type int16_t = i16;
-pub type int32_t = i32;
-pub type int64_t = i64;
-pub type uint8_t = u8;
-pub type uint16_t = u16;
-pub type uint32_t = u32;
-pub type uint64_t = u64;
-
-pub type c_schar = i8;
-pub type c_uchar = u8;
-pub type c_short = i16;
-pub type c_ushort = u16;
-pub type c_int = i32;
-pub type c_uint = u32;
-pub type c_float = f32;
-pub type c_double = f64;
-pub type c_longlong = i64;
-pub type c_ulonglong = u64;
-pub type intmax_t = i64;
-pub type uintmax_t = u64;
-
-pub type size_t = usize;
-pub type ptrdiff_t = isize;
-pub type intptr_t = isize;
-pub type uintptr_t = usize;
-pub type ssize_t = isize;
-
-pub type c_char = i8;
-pub type c_long = i64;
-pub type c_ulong = u64;
-
-pub type wchar_t = i32;
-pub type wint_t = u32;
-pub type wctype_t = i64;
-
-pub type regoff_t = size_t;
-pub type off_t = c_long;
-pub type mode_t = c_int;
-pub type time_t = c_long;
-pub type pid_t = c_int;
-pub type id_t = c_uint;
-pub type gid_t = c_int;
-pub type uid_t = c_int;
-pub type dev_t = c_long;
-pub type ino_t = c_ulong;
-pub type nlink_t = c_ulong;
-pub type blksize_t = c_long;
-pub type blkcnt_t = c_ulong;
-
-pub type fsblkcnt_t = c_ulong;
-pub type fsfilcnt_t = c_ulong;
-
-pub type useconds_t = c_uint;
-pub type suseconds_t = c_int;
-
-pub type clock_t = c_long;
-pub type clockid_t = c_int;
-pub type timer_t = *mut c_void;
-
-pub type nfds_t = c_ulong;
-
-s! {
-    pub struct fd_set {
-        fds_bits: [::c_ulong; FD_SETSIZE / ULONG_SIZE],
-    }
-
-    pub struct pollfd {
-        pub fd: ::c_int,
-        pub events: ::c_short,
-        pub revents: ::c_short,
-    }
-
-    pub struct stat {
-        pub st_dev: ::dev_t,
-        pub st_ino: ::ino_t,
-        pub st_nlink: ::nlink_t,
-        pub st_mode: ::mode_t,
-        pub st_uid: ::uid_t,
-        pub st_gid: ::gid_t,
-        pub st_rdev: ::dev_t,
-        pub st_size: ::off_t,
-        pub st_blksize: ::blksize_t,
-        pub st_blocks: ::blkcnt_t,
-
-        pub st_atime: ::timespec,
-        pub st_mtime: ::timespec,
-        pub st_ctime: ::timespec,
-
-        _pad: [c_char; 24],
-    }
-
-    pub struct timeval {
-        pub tv_sec: time_t,
-        pub tv_usec: suseconds_t,
-    }
-
-    pub struct timespec {
-        pub tv_sec: time_t,
-        pub tv_nsec: c_long,
-    }
-}
-
-pub const INT_MIN: c_int = -2147483648;
-pub const INT_MAX: c_int = 2147483647;
-
-pub const STDIN_FILENO: ::c_int = 0;
-pub const STDOUT_FILENO: ::c_int = 1;
-pub const STDERR_FILENO: ::c_int = 2;
-
-pub const EXIT_FAILURE: ::c_int = 1;
-pub const EXIT_SUCCESS: ::c_int = 0;
-
-pub const FD_SETSIZE: usize = 1024;
-
-pub const MAP_SHARED: ::c_int = 1;
-pub const MAP_PRIVATE: ::c_int = 2;
-pub const MAP_ANONYMOUS: ::c_int = 4;
-pub const MAP_ANON: ::c_int = MAP_ANONYMOUS;
-
-pub const MAP_FAILED: *mut ::c_void = !0 as *mut ::c_void;
-
-pub const POLLIN: ::c_short = 0x001;
-pub const POLLPRI: ::c_short = 0x002;
-pub const POLLOUT: ::c_short = 0x004;
-pub const POLLERR: ::c_short = 0x008;
-pub const POLLHUP: ::c_short = 0x010;
-pub const POLLNVAL: ::c_short = 0x020;
-
-pub const PROT_NONE: ::c_int = 0;
-pub const PROT_EXEC: ::c_int = 1;
-pub const PROT_WRITE: ::c_int = 2;
-pub const PROT_READ: ::c_int = 4;
-
-pub const S_ISUID: ::c_int = 0x800;
-pub const S_ISGID: ::c_int = 0x400;
-pub const S_ISVTX: ::c_int = 0x200;
-
-pub const S_IFIFO: mode_t = 0x1000;
-pub const S_IFCHR: mode_t = 0x2000;
-pub const S_IFBLK: mode_t = 0x6000;
-pub const S_IFDIR: mode_t = 0x4000;
-pub const S_IFREG: mode_t = 0x8000;
-pub const S_IFLNK: mode_t = 0xA000;
-pub const S_IFSOCK: mode_t = 0xC000;
-pub const S_IFMT: mode_t = 0xF000;
-pub const S_IEXEC: mode_t = 0x40;
-pub const S_IWRITE: mode_t = 0x80;
-pub const S_IREAD: mode_t = 0x100;
-pub const S_IRWXU: mode_t = 0x1C0;
-pub const S_IXUSR: mode_t = 0x40;
-pub const S_IWUSR: mode_t = 0x80;
-pub const S_IRUSR: mode_t = 0x100;
-pub const S_IRWXG: mode_t = 0x38;
-pub const S_IXGRP: mode_t = 0x8;
-pub const S_IWGRP: mode_t = 0x10;
-pub const S_IRGRP: mode_t = 0x20;
-pub const S_IRWXO: mode_t = 0x7;
-pub const S_IXOTH: mode_t = 0x1;
-pub const S_IWOTH: mode_t = 0x2;
-pub const S_IROTH: mode_t = 0x4;
-
-pub const F_DUPFD: ::c_int = 0;
-pub const F_GETFD: ::c_int = 1;
-pub const F_SETFD: ::c_int = 2;
-pub const F_GETFL: ::c_int = 3;
-pub const F_SETFL: ::c_int = 4;
-
-pub const FD_CLOEXEC: ::c_int =   0x0100_0000;
-
-pub const O_RDONLY: ::c_int =     0x0001_0000;
-pub const O_WRONLY: ::c_int =     0x0002_0000;
-pub const O_RDWR: ::c_int =       0x0003_0000;
-pub const O_NONBLOCK: ::c_int =   0x0004_0000;
-pub const O_APPEND: ::c_int =     0x0008_0000;
-pub const O_SHLOCK: ::c_int =     0x0010_0000;
-pub const O_EXLOCK: ::c_int =     0x0020_0000;
-pub const O_ASYNC: ::c_int =      0x0040_0000;
-pub const O_FSYNC: ::c_int =      0x0080_0000;
-pub const O_CLOEXEC: ::c_int =    0x0100_0000;
-pub const O_CREAT: ::c_int =      0x0200_0000;
-pub const O_TRUNC: ::c_int =      0x0400_0000;
-pub const O_EXCL: ::c_int =       0x0800_0000;
-pub const O_DIRECTORY: ::c_int =  0x1000_0000;
-pub const O_STAT: ::c_int =       0x2000_0000;
-pub const O_SYMLINK: ::c_int =    0x4000_0000;
-pub const O_NOFOLLOW: ::c_int =   0x8000_0000;
-pub const O_ACCMODE: ::c_int =    O_RDONLY | O_WRONLY | O_RDWR;
-
-pub const SIGHUP:    ::c_int = 1;
-pub const SIGINT:    ::c_int = 2;
-pub const SIGQUIT:   ::c_int = 3;
-pub const SIGILL:    ::c_int = 4;
-pub const SIGTRAP:   ::c_int = 5;
-pub const SIGABRT:   ::c_int = 6;
-pub const SIGBUS:    ::c_int = 7;
-pub const SIGFPE:    ::c_int = 8;
-pub const SIGKILL:   ::c_int = 9;
-pub const SIGUSR1:   ::c_int = 10;
-pub const SIGSEGV:   ::c_int = 11;
-pub const SIGUSR2:   ::c_int = 12;
-pub const SIGPIPE:   ::c_int = 13;
-pub const SIGALRM:   ::c_int = 14;
-pub const SIGTERM:   ::c_int = 15;
-pub const SIGSTKFLT: ::c_int = 16;
-pub const SIGCHLD:   ::c_int = 17;
-pub const SIGCONT:   ::c_int = 18;
-pub const SIGSTOP:   ::c_int = 19;
-pub const SIGTSTP:   ::c_int = 20;
-pub const SIGTTIN:   ::c_int = 21;
-pub const SIGTTOU:   ::c_int = 22;
-pub const SIGURG:    ::c_int = 23;
-pub const SIGXCPU:   ::c_int = 24;
-pub const SIGXFSZ:   ::c_int = 25;
-pub const SIGVTALRM: ::c_int = 26;
-pub const SIGPROF:   ::c_int = 27;
-pub const SIGWINCH:  ::c_int = 28;
-pub const SIGIO:     ::c_int = 29;
-pub const SIGPWR:    ::c_int = 30;
-pub const SIGSYS:    ::c_int = 31;
-
-#[cfg_attr(feature = "extra_traits", derive(Debug))]
-pub enum FILE {}
-impl ::Copy for FILE {}
-impl ::Clone for FILE {
-    fn clone(&self) -> FILE { *self }
-}
-#[cfg_attr(feature = "extra_traits", derive(Debug))]
-pub enum fpos_t {} // TODO: fill this out with a struct
-impl ::Copy for fpos_t {}
-impl ::Clone for fpos_t {
-    fn clone(&self) -> fpos_t { *self }
-}
-
-// intentionally not public, only used for fd_set
-cfg_if! {
-    if #[cfg(target_pointer_width = "32")] {
-        const ULONG_SIZE: usize = 32;
-    } else if #[cfg(target_pointer_width = "64")] {
-        const ULONG_SIZE: usize = 64;
-    } else {
-        // Unknown target_pointer_width
-    }
-}
-
-extern {
-    pub fn isalnum(c: c_int) -> c_int;
-    pub fn isalpha(c: c_int) -> c_int;
-    pub fn iscntrl(c: c_int) -> c_int;
-    pub fn isdigit(c: c_int) -> c_int;
-    pub fn isgraph(c: c_int) -> c_int;
-    pub fn islower(c: c_int) -> c_int;
-    pub fn isprint(c: c_int) -> c_int;
-    pub fn ispunct(c: c_int) -> c_int;
-    pub fn isspace(c: c_int) -> c_int;
-    pub fn isupper(c: c_int) -> c_int;
-    pub fn isxdigit(c: c_int) -> c_int;
-    pub fn tolower(c: c_int) -> c_int;
-    pub fn toupper(c: c_int) -> c_int;
-    pub fn fopen(filename: *const c_char, mode: *const c_char) -> *mut FILE;
-    pub fn freopen(filename: *const c_char, mode: *const c_char,
-                   file: *mut FILE) -> *mut FILE;
-    pub fn fflush(file: *mut FILE) -> c_int;
-    pub fn fclose(file: *mut FILE) -> c_int;
-    pub fn remove(filename: *const c_char) -> c_int;
-    pub fn rename(oldname: *const c_char, newname: *const c_char) -> c_int;
-    pub fn tmpfile() -> *mut FILE;
-    pub fn setvbuf(stream: *mut FILE, buffer: *mut c_char, mode: c_int,
-                   size: size_t) -> c_int;
-    pub fn setbuf(stream: *mut FILE, buf: *mut c_char);
-    pub fn getchar() -> c_int;
-    pub fn putchar(c: c_int) -> c_int;
-    pub fn fgetc(stream: *mut FILE) -> c_int;
-    pub fn fgets(buf: *mut c_char, n: c_int, stream: *mut FILE) -> *mut c_char;
-    pub fn fputc(c: c_int, stream: *mut FILE) -> c_int;
-    pub fn fputs(s: *const c_char, stream: *mut FILE) -> c_int;
-    pub fn puts(s: *const c_char) -> c_int;
-    pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
-    pub fn fread(ptr: *mut c_void, size: size_t, nobj: size_t,
-                 stream: *mut FILE) -> size_t;
-    pub fn fwrite(ptr: *const c_void, size: size_t, nobj: size_t,
-                  stream: *mut FILE) -> size_t;
-    pub fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int;
-    pub fn ftell(stream: *mut FILE) -> c_long;
-    pub fn rewind(stream: *mut FILE);
-    pub fn fgetpos(stream: *mut FILE, ptr: *mut fpos_t) -> c_int;
-    pub fn fsetpos(stream: *mut FILE, ptr: *const fpos_t) -> c_int;
-    pub fn feof(stream: *mut FILE) -> c_int;
-    pub fn ferror(stream: *mut FILE) -> c_int;
-    pub fn perror(s: *const c_char);
-    pub fn atoi(s: *const c_char) -> c_int;
-    pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
-    pub fn strtol(s: *const c_char, endp: *mut *mut c_char,
-                  base: c_int) -> c_long;
-    pub fn strtoul(s: *const c_char, endp: *mut *mut c_char,
-                   base: c_int) -> c_ulong;
-    pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
-    pub fn malloc(size: size_t) -> *mut c_void;
-    pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
-    pub fn free(p: *mut c_void);
-    pub fn abort() -> !;
-    pub fn exit(status: c_int) -> !;
-    pub fn _exit(status: c_int) -> !;
-    pub fn atexit(cb: extern fn()) -> c_int;
-    pub fn system(s: *const c_char) -> c_int;
-    pub fn getenv(s: *const c_char) -> *mut c_char;
-
-    pub fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
-    pub fn strncpy(dst: *mut c_char, src: *const c_char,
-                   n: size_t) -> *mut c_char;
-    pub fn strcat(s: *mut c_char, ct: *const c_char) -> *mut c_char;
-    pub fn strncat(s: *mut c_char, ct: *const c_char,
-                   n: size_t) -> *mut c_char;
-    pub fn strcmp(cs: *const c_char, ct: *const c_char) -> c_int;
-    pub fn strncmp(cs: *const c_char, ct: *const c_char,
-                   n: size_t) -> c_int;
-    pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
-    pub fn strchr(cs: *const c_char, c: c_int) -> *mut c_char;
-    pub fn strrchr(cs: *const c_char, c: c_int) -> *mut c_char;
-    pub fn strspn(cs: *const c_char, ct: *const c_char) -> size_t;
-    pub fn strcspn(cs: *const c_char, ct: *const c_char) -> size_t;
-    pub fn strdup(cs: *const c_char) -> *mut c_char;
-    pub fn strpbrk(cs: *const c_char, ct: *const c_char) -> *mut c_char;
-    pub fn strstr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
-    pub fn strcasestr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
-    pub fn strcasecmp(s1: *const c_char, s2: *const c_char) -> c_int;
-    pub fn strncasecmp(s1: *const c_char, s2: *const c_char,
-                       n: size_t) -> c_int;
-    pub fn strlen(cs: *const c_char) -> size_t;
-    pub fn strnlen(cs: *const c_char, maxlen: size_t) -> size_t;
-    pub fn strerror(n: c_int) -> *mut c_char;
-    pub fn strtok(s: *mut c_char, t: *const c_char) -> *mut c_char;
-    pub fn strxfrm(s: *mut c_char, ct: *const c_char, n: size_t) -> size_t;
-    pub fn wcslen(buf: *const wchar_t) -> size_t;
-    pub fn wcstombs(dest: *mut c_char, src: *const wchar_t,
-                    n: size_t) -> ::size_t;
-
-    pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
-    pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
-    pub fn memcpy(dest: *mut c_void, src: *const c_void,
-                  n: size_t) -> *mut c_void;
-    pub fn memmove(dest: *mut c_void, src: *const c_void,
-                   n: size_t) -> *mut c_void;
-    pub fn memset(dest: *mut c_void, c: c_int, n: size_t) -> *mut c_void;
-
-    pub fn abs(i: c_int) -> c_int;
-    pub fn atof(s: *const c_char) -> c_double;
-    pub fn labs(i: c_long) -> c_long;
-    pub fn rand() -> c_int;
-    pub fn srand(seed: c_uint);
-
-    pub fn chown(path: *const c_char, uid: uid_t, gid: gid_t) -> ::c_int;
-    pub fn close(fd: ::c_int) -> ::c_int;
-    pub fn fchown(fd: ::c_int, uid: ::uid_t, gid: ::gid_t) -> ::c_int;
-    pub fn fcntl(fd: ::c_int, cmd: ::c_int, ...) -> ::c_int;
-    pub fn fstat(fd: ::c_int, buf: *mut stat) -> ::c_int;
-    pub fn fsync(fd: ::c_int) -> ::c_int;
-    pub fn gethostname(name: *mut ::c_char, len: ::size_t) -> ::c_int;
-    pub fn getpid() -> pid_t;
-    pub fn memalign(align: ::size_t, size: ::size_t) -> *mut ::c_void;
-    pub fn mmap(addr: *mut ::c_void,
-         len: ::size_t,
-         prot: ::c_int,
-         flags: ::c_int,
-         fd: ::c_int,
-         offset: off_t)
-         -> *mut ::c_void;
-    pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
-                    -> ::c_int;
-    pub fn munmap(addr: *mut ::c_void, len: ::size_t) -> ::c_int;
-    pub fn poll(fds: *mut pollfd, nfds: nfds_t, timeout: ::c_int) -> ::c_int;
-    pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t) -> ::ssize_t;
-    pub fn setenv(name: *const c_char, val: *const c_char, overwrite: ::c_int)
-                  -> ::c_int;
-    pub fn unsetenv(name: *const c_char) -> ::c_int;
-    pub fn write(fd: ::c_int, buf: *const ::c_void, count: ::size_t)
-                 -> ::ssize_t;
-}
-
-#[link(name = "c")]
-#[link(name = "m")]
-extern {}
-
-pub use self::net::*;
-
-mod net;
-
-cfg_if! {
-    if #[cfg(libc_core_cvoid)] {
-        pub use ::ffi::c_void;
-    } else {
-        // Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help
-        // enable more optimization opportunities around it recognizing things
-        // like malloc/free.
-        #[repr(u8)]
-        #[allow(missing_copy_implementations)]
-        #[allow(missing_debug_implementations)]
-        pub enum c_void {
-            // Two dummy variants so the #[repr] attribute can be used.
-            #[doc(hidden)]
-            __variant1,
-            #[doc(hidden)]
-            __variant2,
-        }
-    }
-}
-
-cfg_if! {
-    if #[cfg(libc_align)] {
-        mod align;
-        pub use self::align::*;
-    } else {
-        mod no_align;
-        pub use self::no_align::*;
-    }
-}
diff --git a/src/redox/net.rs b/src/redox/net.rs
deleted file mode 100644
index 5d962b1649..0000000000
--- a/src/redox/net.rs
+++ /dev/null
@@ -1,117 +0,0 @@
-pub type in_addr_t = u32;
-pub type in_port_t = u16;
-
-pub type socklen_t = u32;
-pub type sa_family_t = u16;
-
-s! {
-    pub struct in_addr {
-        pub s_addr: in_addr_t,
-    }
-
-    pub struct ip_mreq {
-        pub imr_multiaddr: in_addr,
-        pub imr_interface: in_addr,
-    }
-
-    pub struct ipv6_mreq {
-        pub ipv6mr_multiaddr: ::in6_addr,
-        pub ipv6mr_interface: ::c_uint,
-    }
-
-    pub struct linger {
-        pub l_onoff: ::c_int,
-        pub l_linger: ::c_int,
-    }
-
-    pub struct sockaddr {
-        pub sa_family: sa_family_t,
-        pub sa_data: [::c_char; 14],
-    }
-
-    pub struct sockaddr_in {
-        pub sin_family: sa_family_t,
-        pub sin_port: ::in_port_t,
-        pub sin_addr: ::in_addr,
-        pub sin_zero: [u8; 8],
-    }
-
-    pub struct sockaddr_in6 {
-        pub sin6_family: sa_family_t,
-        pub sin6_port: in_port_t,
-        pub sin6_flowinfo: u32,
-        pub sin6_addr: ::in6_addr,
-        pub sin6_scope_id: u32,
-    }
-
-    pub struct sockaddr_storage {
-        pub ss_family: sa_family_t,
-        pub __ss_padding: [u8; 26],
-    }
-}
-
-pub const AF_INET: ::c_int = 2;
-pub const AF_INET6: ::c_int = 23;
-
-pub const SOCK_STREAM: ::c_int = 1;
-pub const SOCK_DGRAM: ::c_int = 2;
-
-pub const IPPROTO_TCP: ::c_int = 6;
-pub const IPPROTO_IP: ::c_int = 0;
-pub const IPPROTO_IPV6: ::c_int = 41;
-
-pub const TCP_KEEPIDLE: ::c_int = 4;
-pub const TCP_NODELAY: ::c_int = 8193;
-
-pub const IP_TTL: ::c_int = 8;
-pub const IP_MULTICAST_LOOP: ::c_int = 9;
-pub const IP_MULTICAST_TTL: ::c_int = 10;
-pub const IP_ADD_MEMBERSHIP: ::c_int = 11;
-pub const IP_DROP_MEMBERSHIP: ::c_int = 12;
-
-pub const IPV6_MULTICAST_LOOP: ::c_int = 19;
-pub const IPV6_ADD_MEMBERSHIP: ::c_int = 20;
-pub const IPV6_DROP_MEMBERSHIP: ::c_int = 21;
-pub const IPV6_V6ONLY: ::c_int = 26;
-
-pub const SOL_SOCKET: ::c_int = 65535;
-
-pub const SO_REUSEADDR: ::c_int = 4;
-pub const SO_BROADCAST: ::c_int = 6;
-pub const SO_KEEPALIVE: ::c_int = 8;
-pub const SO_RCVTIMEO: ::c_int = 20;
-pub const SO_SNDTIMEO: ::c_int = 21;
-pub const SO_LINGER: ::c_int = 128;
-pub const SO_SNDBUF: ::c_int = 4097;
-pub const SO_RCVBUF: ::c_int = 4098;
-pub const SO_ERROR: ::c_int = 4105;
-
-extern {
-    pub fn socket(domain: ::c_int, ty: ::c_int, protocol: ::c_int) -> ::c_int;
-    pub fn bind(fd: ::c_int, addr: *const sockaddr, len: socklen_t) -> ::c_int;
-    pub fn connect(socket: ::c_int, address: *const sockaddr,
-                   len: socklen_t) -> ::c_int;
-    pub fn listen(socket: ::c_int, backlog: ::c_int) -> ::c_int;
-    pub fn getsockname(socket: ::c_int, address: *mut sockaddr,
-                       address_len: *mut socklen_t) -> ::c_int;
-    pub fn getsockopt(sockfd: ::c_int,
-                      level: ::c_int,
-                      optname: ::c_int,
-                      optval: *mut ::c_void,
-                      optlen: *mut ::socklen_t) -> ::c_int;
-    pub fn setsockopt(socket: ::c_int, level: ::c_int, name: ::c_int,
-                      value: *const ::c_void,
-                      option_len: socklen_t) -> ::c_int;
-    pub fn getpeername(socket: ::c_int, address: *mut sockaddr,
-                       address_len: *mut socklen_t) -> ::c_int;
-    pub fn sendto(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
-                  flags: ::c_int, addr: *const sockaddr,
-                  addrlen: socklen_t) -> ::ssize_t;
-    pub fn send(socket: ::c_int, buf: *const ::c_void, len: ::size_t,
-                flags: ::c_int) -> ::ssize_t;
-    pub fn recvfrom(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
-                    flags: ::c_int, addr: *mut ::sockaddr,
-                    addrlen: *mut ::socklen_t) -> ::ssize_t;
-    pub fn recv(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
-                flags: ::c_int) -> ::ssize_t;
-}
diff --git a/src/redox/no_align.rs b/src/redox/no_align.rs
deleted file mode 100644
index f6b9f4c12d..0000000000
--- a/src/redox/no_align.rs
+++ /dev/null
@@ -1,6 +0,0 @@
-s! {
-    pub struct in6_addr {
-        pub s6_addr: [u8; 16],
-        __align: [u32; 0],
-    }
-}
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 375acabbc3..1565b6338c 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -223,7 +223,11 @@ pub const DT_REG: u8 = 8;
 pub const DT_LNK: u8 = 10;
 pub const DT_SOCK: u8 = 12;
 
-pub const FD_CLOEXEC: ::c_int = 0x1;
+cfg_if! {
+    if #[cfg(not(target_os = "redox"))] {
+        pub const FD_CLOEXEC: ::c_int = 0x1;
+    }
+}
 
 pub const USRQUOTA: ::c_int = 0;
 pub const GRPQUOTA: ::c_int = 1;
@@ -348,6 +352,13 @@ cfg_if! {
         #[link(name = "c")]
         #[link(name = "m")]
         extern {}
+    } else if #[cfg(target_os = "redox")] {
+        #[cfg_attr(feature = "rustc-dep-of-std",
+                   link(name = "c", kind = "static-nobundle",
+                        cfg(target_feature = "crt-static")))]
+        #[cfg_attr(feature = "rustc-dep-of-std",
+                   link(name = "c", cfg(not(target_feature = "crt-static"))))]
+        extern {}
     } else {
         #[link(name = "c")]
         #[link(name = "m")]
@@ -1170,6 +1181,9 @@ cfg_if! {
     } else if #[cfg(target_os = "hermit")] {
         mod hermit;
         pub use self::hermit::*;
+    } else if #[cfg(target_os = "redox")] {
+        mod redox;
+        pub use self::redox::*;
     } else {
         // Unknown target_os
     }
diff --git a/src/unix/redox/mod.rs b/src/unix/redox/mod.rs
new file mode 100644
index 0000000000..4bb1ab4ba4
--- /dev/null
+++ b/src/unix/redox/mod.rs
@@ -0,0 +1,588 @@
+pub type c_char = i8;
+pub type c_long = i64;
+pub type c_ulong = u64;
+pub type wchar_t = i32;
+
+pub type blkcnt_t = ::c_ulong;
+pub type blksize_t = ::c_long;
+pub type clock_t = ::c_long;
+pub type clockid_t = ::c_int;
+pub type dev_t = ::c_long;
+pub type fsblkcnt_t = ::c_ulong;
+pub type fsfilcnt_t = ::c_ulong;
+pub type ino_t = ::c_ulong;
+pub type mode_t = ::c_int;
+pub type nfds_t = ::c_ulong;
+pub type nlink_t = ::c_ulong;
+pub type off_t = ::c_long;
+pub type pthread_t = *mut ::c_void;
+pub type pthread_attr_t = *mut ::c_void;
+pub type pthread_cond_t = *mut ::c_void;
+pub type pthread_condattr_t = *mut ::c_void;
+// Must be usize due to libstd/sys_common/thread_local.rs,
+// should technically be *mut ::c_void
+pub type pthread_key_t = usize;
+pub type pthread_mutex_t = *mut ::c_void;
+pub type pthread_mutexattr_t = *mut ::c_void;
+pub type pthread_rwlock_t = *mut ::c_void;
+pub type pthread_rwlockattr_t = *mut ::c_void;
+pub type rlim_t = ::c_ulonglong;
+pub type sa_family_t = u16;
+pub type sem_t = *mut ::c_void;
+pub type sigset_t = ::c_ulong;
+pub type socklen_t = u32;
+pub type speed_t = u32;
+pub type suseconds_t = ::c_int;
+pub type tcflag_t = u32;
+pub type time_t = ::c_long;
+
+s! {
+    pub struct addrinfo {
+        pub ai_flags: ::c_int,
+        pub ai_family: ::c_int,
+        pub ai_socktype: ::c_int,
+        pub ai_protocol: ::c_int,
+        pub ai_addrlen: ::size_t,
+        pub ai_canonname: *mut ::c_char,
+        pub ai_addr: *mut ::sockaddr,
+        pub ai_next: *mut ::addrinfo,
+    }
+
+    pub struct dirent {
+        pub d_ino: ::ino_t,
+        pub d_off: ::off_t,
+        pub d_reclen: ::c_ushort,
+        pub d_type: ::c_uchar,
+        pub d_name: [::c_char; 256],
+    }
+
+    pub struct Dl_info {
+        pub dli_fname: *const ::c_char,
+        pub dli_fbase: *mut ::c_void,
+        pub dli_sname: *const ::c_char,
+        pub dli_saddr: *mut ::c_void,
+    }
+
+    pub struct epoll_event {
+        pub events: u32,
+        pub u64: u64,
+        pub _pad: u64,
+    }
+
+    pub struct fd_set {
+        fds_bits: [::c_ulong; ::FD_SETSIZE / ULONG_SIZE],
+    }
+
+    pub struct in_addr {
+        pub s_addr: ::in_addr_t,
+    }
+
+    pub struct ip_mreq {
+        pub imr_multiaddr: ::in_addr,
+        pub imr_interface: ::in_addr,
+    }
+
+    pub struct lconv {
+        pub currency_symbol: *const ::c_char,
+        pub decimal_point: *const ::c_char,
+        pub frac_digits: ::c_char,
+        pub grouping: *const ::c_char,
+        pub int_curr_symbol: *const ::c_char,
+        pub int_frac_digits: ::c_char,
+        pub mon_decimal_point: *const ::c_char,
+        pub mon_grouping: *const ::c_char,
+        pub mon_thousands_sep: *const ::c_char,
+        pub negative_sign: *const ::c_char,
+        pub n_cs_precedes: ::c_char,
+        pub n_sep_by_space: ::c_char,
+        pub n_sign_posn: ::c_char,
+        pub positive_sign: *const ::c_char,
+        pub p_cs_precedes: ::c_char,
+        pub p_sep_by_space: ::c_char,
+        pub p_sign_posn: ::c_char,
+        pub thousands_sep: *const ::c_char,
+    }
+
+    pub struct passwd {
+        pub pw_name: *mut ::c_char,
+        pub pw_passwd: *mut ::c_char,
+        pub pw_uid: ::uid_t,
+        pub pw_gid: ::gid_t,
+        pub pw_gecos: *mut ::c_char,
+        pub pw_dir: *mut ::c_char,
+        pub pw_shell: *mut ::c_char,
+    }
+
+    pub struct sigaction {
+        pub sa_handler: ::sighandler_t,
+        pub sa_flags: ::c_ulong,
+        pub sa_restorer: ::Option<extern fn()>,
+        pub sa_mask: ::sigset_t,
+    }
+
+    pub struct sockaddr {
+        pub sa_family: ::sa_family_t,
+        pub sa_data: [::c_char; 14],
+    }
+
+    pub struct sockaddr_in {
+        pub sin_family: ::sa_family_t,
+        pub sin_port: ::in_port_t,
+        pub sin_addr: ::in_addr,
+        pub sin_zero: [::c_char; 8],
+    }
+
+    pub struct sockaddr_in6 {
+        pub sin6_family: ::sa_family_t,
+        pub sin6_port: ::in_port_t,
+        pub sin6_flowinfo: u32,
+        pub sin6_addr: ::in6_addr,
+        pub sin6_scope_id: u32,
+    }
+
+    pub struct sockaddr_storage {
+        pub ss_family: ::sa_family_t,
+        __ss_padding: [
+            u8;
+            128 -
+            ::core::mem::size_of::<sa_family_t>() -
+            ::core::mem::size_of::<c_ulong>()
+        ],
+        __ss_align: ::c_ulong,
+    }
+
+    pub struct sockaddr_un {
+        pub sun_family: ::sa_family_t,
+        pub sun_path: [::c_char; 108]
+    }
+
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_nlink: ::nlink_t,
+        pub st_mode: ::mode_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::dev_t,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atime: ::time_t,
+        pub st_atime_nsec: ::c_long,
+        pub st_mtime: ::time_t,
+        pub st_mtime_nsec: ::c_long,
+        pub st_ctime: ::time_t,
+        pub st_ctime_nsec: ::c_long,
+        _pad: [::c_char; 24],
+    }
+
+    pub struct statvfs {
+        pub f_bsize: ::c_ulong,
+        pub f_frsize: ::c_ulong,
+        pub f_blocks: ::fsblkcnt_t,
+        pub f_bfree: ::fsblkcnt_t,
+        pub f_bavail: ::fsblkcnt_t,
+        pub f_files: ::fsfilcnt_t,
+        pub f_ffree: ::fsfilcnt_t,
+        pub f_favail: ::fsfilcnt_t,
+        pub f_fsid: ::c_ulong,
+        pub f_flag: ::c_ulong,
+        pub f_namemax: ::c_ulong,
+    }
+
+    pub struct termios {
+        pub c_iflag: ::tcflag_t,
+        pub c_oflag: ::tcflag_t,
+        pub c_cflag: ::tcflag_t,
+        pub c_lflag: ::tcflag_t,
+        pub c_line: ::cc_t,
+        pub c_cc: [::cc_t; ::NCCS],
+        pub c_ispeed: ::speed_t,
+        pub c_ospeed: ::speed_t,
+    }
+
+    pub struct tm {
+        pub tm_sec: ::c_int,
+        pub tm_min: ::c_int,
+        pub tm_hour: ::c_int,
+        pub tm_mday: ::c_int,
+        pub tm_mon: ::c_int,
+        pub tm_year: ::c_int,
+        pub tm_wday: ::c_int,
+        pub tm_yday: ::c_int,
+        pub tm_isdst: ::c_int,
+        pub tm_gmtoff: ::c_long,
+        pub tm_zone: *const ::c_char,
+    }
+}
+
+// TODO: relibc {
+    pub const RTLD_DEFAULT: *mut ::c_void = 0i64 as *mut ::c_void;
+// }
+
+// dlfcn.h
+
+pub const RTLD_LAZY: ::c_int = 0x0001;
+pub const RTLD_NOW: ::c_int = 0x0002;
+pub const RTLD_GLOBAL: ::c_int = 0x0100;
+pub const RTLD_LOCAL: ::c_int = 0x0000;
+
+// errno.h
+pub const EPERM: ::c_int = 1;
+pub const ENOENT: ::c_int = 2;
+pub const ESRCH: ::c_int = 3;
+pub const EINTR: ::c_int = 4;
+pub const EIO: ::c_int = 5;
+pub const ENXIO: ::c_int = 6;
+pub const E2BIG: ::c_int = 7;
+pub const ENOEXEC: ::c_int = 8;
+pub const EBADF: ::c_int = 9;
+pub const ECHILD: ::c_int = 10;
+pub const EAGAIN: ::c_int = 11;
+pub const ENOMEM: ::c_int = 12;
+pub const EACCES: ::c_int = 13;
+pub const EFAULT: ::c_int = 14;
+pub const ENOTBLK: ::c_int = 15;
+pub const EBUSY: ::c_int = 16;
+pub const EEXIST: ::c_int = 17;
+pub const EXDEV: ::c_int = 18;
+pub const ENODEV: ::c_int = 19;
+pub const ENOTDIR: ::c_int = 20;
+pub const EISDIR: ::c_int = 21;
+pub const EINVAL: ::c_int = 22;
+pub const ENFILE: ::c_int = 23;
+pub const EMFILE: ::c_int = 24;
+pub const ENOTTY: ::c_int = 25;
+pub const ETXTBSY: ::c_int = 26;
+pub const EFBIG: ::c_int = 27;
+pub const ENOSPC: ::c_int = 28;
+pub const ESPIPE: ::c_int = 29;
+pub const EROFS: ::c_int = 30;
+pub const EMLINK: ::c_int = 31;
+pub const EPIPE: ::c_int = 32;
+pub const EDOM: ::c_int = 33;
+pub const ERANGE: ::c_int = 34;
+pub const EDEADLK: ::c_int = 35;
+pub const ENOSYS: ::c_int = 38;
+pub const EWOULDBLOCK: ::c_int = 41;
+pub const EADDRINUSE: ::c_int = 98;
+pub const EADDRNOTAVAIL: ::c_int = 99;
+pub const ECONNABORTED: ::c_int = 103;
+pub const ECONNRESET: ::c_int = 104;
+pub const ENOTCONN: ::c_int = 107;
+pub const ETIMEDOUT: ::c_int = 110;
+pub const ECONNREFUSED: ::c_int = 111;
+pub const EINPROGRESS: ::c_int = 115;
+
+// fcntl.h
+pub const F_DUPFD: ::c_int = 0;
+pub const F_GETFD: ::c_int = 1;
+pub const F_SETFD: ::c_int = 2;
+pub const F_GETFL: ::c_int = 3;
+pub const F_SETFL: ::c_int = 4;
+// TODO: relibc {
+    pub const F_DUPFD_CLOEXEC: ::c_int = ::F_DUPFD;
+// }
+pub const FD_CLOEXEC: ::c_int = 0x0100_0000;
+pub const O_RDONLY: ::c_int = 0x0001_0000;
+pub const O_WRONLY: ::c_int = 0x0002_0000;
+pub const O_RDWR: ::c_int = 0x0003_0000;
+pub const O_ACCMODE: ::c_int = 0x0003_0000;
+pub const O_NONBLOCK: ::c_int = 0x0004_0000;
+pub const O_APPEND: ::c_int = 0x0008_0000;
+pub const O_SHLOCK: ::c_int = 0x0010_0000;
+pub const O_EXLOCK: ::c_int = 0x0020_0000;
+pub const O_ASYNC: ::c_int = 0x0040_0000;
+pub const O_FSYNC: ::c_int = 0x0080_0000;
+pub const O_CLOEXEC: ::c_int = 0x0100_0000;
+pub const O_CREAT: ::c_int = 0x0200_0000;
+pub const O_TRUNC: ::c_int = 0x0400_0000;
+pub const O_EXCL: ::c_int = 0x0800_0000;
+pub const O_DIRECTORY: ::c_int = 0x1000_0000;
+pub const O_PATH: ::c_int = 0x2000_0000;
+pub const O_SYMLINK: ::c_int = 0x4000_0000;
+// Negative to allow it to be used as int
+// TODO: Fix negative values missing from includes
+pub const O_NOFOLLOW: ::c_int = -0x8000_0000;
+
+// netdb.h
+pub const EAI_SYSTEM: ::c_int = -11;
+
+// netinet/in.h
+// TODO: relibc {
+    pub const IP_TTL: ::c_int = 2;
+    pub const IPV6_UNICAST_HOPS: ::c_int = 16;
+    pub const IPV6_MULTICAST_IF: ::c_int = 17;
+    pub const IPV6_MULTICAST_HOPS: ::c_int = 18;
+    pub const IPV6_MULTICAST_LOOP: ::c_int = 19;
+    pub const IPV6_ADD_MEMBERSHIP: ::c_int = 20;
+    pub const IPV6_DROP_MEMBERSHIP: ::c_int = 21;
+    pub const IPV6_V6ONLY: ::c_int = 26;
+    pub const IP_MULTICAST_IF: ::c_int = 32;
+    pub const IP_MULTICAST_TTL: ::c_int = 33;
+    pub const IP_MULTICAST_LOOP: ::c_int = 34;
+    pub const IP_ADD_MEMBERSHIP: ::c_int = 35;
+    pub const IP_DROP_MEMBERSHIP: ::c_int = 36;
+// }
+
+// netinet/tcp.h
+pub const TCP_NODELAY: ::c_int = 1;
+// TODO: relibc {
+    pub const TCP_KEEPIDLE: ::c_int = 1;
+// }
+
+// poll.h
+pub const POLLIN: ::c_short = 0x001;
+pub const POLLPRI: ::c_short = 0x002;
+pub const POLLOUT: ::c_short = 0x004;
+pub const POLLERR: ::c_short = 0x008;
+pub const POLLHUP: ::c_short = 0x010;
+pub const POLLNVAL: ::c_short = 0x020;
+
+// pthread.h
+pub const PTHREAD_MUTEX_NORMAL: ::c_int = 0;
+pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 1;
+pub const PTHREAD_MUTEX_INITIALIZER: ::pthread_mutex_t = -1isize as *mut _;
+pub const PTHREAD_COND_INITIALIZER: ::pthread_cond_t = -1isize as *mut _;
+pub const PTHREAD_RWLOCK_INITIALIZER: ::pthread_rwlock_t = -1isize as *mut _;
+pub const PTHREAD_STACK_MIN : ::size_t = 4096;
+
+// signal.h
+pub const SIG_BLOCK: ::c_int = 0;
+pub const SIG_UNBLOCK: ::c_int = 1;
+pub const SIG_SETMASK: ::c_int = 2;
+pub const SIGHUP: ::c_int = 1;
+pub const SIGINT: ::c_int = 2;
+pub const SIGQUIT: ::c_int = 3;
+pub const SIGILL: ::c_int = 4;
+pub const SIGTRAP: ::c_int = 5;
+pub const SIGABRT: ::c_int = 6;
+pub const SIGBUS: ::c_int = 7;
+pub const SIGFPE: ::c_int = 8;
+pub const SIGKILL: ::c_int = 9;
+pub const SIGUSR1: ::c_int = 10;
+pub const SIGSEGV: ::c_int = 11;
+pub const SIGUSR2: ::c_int = 12;
+pub const SIGPIPE: ::c_int = 13;
+pub const SIGALRM: ::c_int = 14;
+pub const SIGTERM: ::c_int = 15;
+pub const SIGSTKFLT: ::c_int = 16;
+pub const SIGCHLD: ::c_int = 17;
+pub const SIGCONT: ::c_int = 18;
+pub const SIGSTOP: ::c_int = 19;
+pub const SIGTSTP: ::c_int = 20;
+pub const SIGTTIN: ::c_int = 21;
+pub const SIGTTOU: ::c_int = 22;
+pub const SIGURG: ::c_int = 23;
+pub const SIGXCPU: ::c_int = 24;
+pub const SIGXFSZ: ::c_int = 25;
+pub const SIGVTALRM: ::c_int = 26;
+pub const SIGPROF: ::c_int = 27;
+pub const SIGWINCH: ::c_int = 28;
+pub const SIGIO: ::c_int = 29;
+pub const SIGPWR: ::c_int = 30;
+pub const SIGSYS: ::c_int = 31;
+pub const NSIG: ::c_int = 32;
+
+// sys/epoll.h
+pub const EPOLL_CLOEXEC: ::c_int = 0x0100_0000;
+pub const EPOLL_CTL_ADD: ::c_int = 1;
+pub const EPOLL_CTL_DEL: ::c_int = 2;
+pub const EPOLL_CTL_MOD: ::c_int = 3;
+pub const EPOLLIN: ::c_int = 1;
+pub const EPOLLPRI: ::c_int = 0;
+pub const EPOLLOUT: ::c_int = 2;
+pub const EPOLLRDNORM: ::c_int = 0;
+pub const EPOLLNVAL: ::c_int = 0;
+pub const EPOLLRDBAND: ::c_int = 0;
+pub const EPOLLWRNORM: ::c_int = 0;
+pub const EPOLLWRBAND: ::c_int = 0;
+pub const EPOLLMSG: ::c_int = 0;
+pub const EPOLLERR: ::c_int = 0;
+pub const EPOLLHUP: ::c_int = 0;
+pub const EPOLLRDHUP: ::c_int = 0;
+pub const EPOLLEXCLUSIVE: ::c_int = 0;
+pub const EPOLLWAKEUP: ::c_int = 0;
+pub const EPOLLONESHOT: ::c_int = 0;
+pub const EPOLLET: ::c_int = 0;
+
+// sys/stat.h
+pub const S_IFMT: ::c_int = 0o0_170_000;
+pub const S_IFDIR: ::c_int = 0o040_000;
+pub const S_IFCHR: ::c_int = 0o020_000;
+pub const S_IFBLK: ::c_int = 0o060_000;
+pub const S_IFREG: ::c_int = 0o100_000;
+pub const S_IFIFO: ::c_int = 0o010_000;
+pub const S_IFLNK: ::c_int = 0o120_000;
+pub const S_IFSOCK: ::c_int = 0o140_000;
+pub const S_IRWXU: ::c_int = 0o0_700;
+pub const S_IRUSR: ::c_int = 0o0_400;
+pub const S_IWUSR: ::c_int = 0o0_200;
+pub const S_IXUSR: ::c_int = 0o0_100;
+pub const S_IRWXG: ::c_int = 0o0_070;
+pub const S_IRGRP: ::c_int = 0o0_040;
+pub const S_IWGRP: ::c_int = 0o0_020;
+pub const S_IXGRP: ::c_int = 0o0_010;
+pub const S_IRWXO: ::c_int = 0o0_007;
+pub const S_IROTH: ::c_int = 0o0_004;
+pub const S_IWOTH: ::c_int = 0o0_002;
+pub const S_IXOTH: ::c_int = 0o0_001;
+
+// stdlib.h
+pub const EXIT_SUCCESS: ::c_int = 0;
+pub const EXIT_FAILURE: ::c_int = 1;
+
+// sys/ioctl.h
+// TODO: relibc {
+    pub const FIONBIO: ::c_ulong = 0x5421;
+    pub const FIOCLEX: ::c_ulong = 0x5451;
+// }
+pub const TCGETS: ::c_ulong = 0x5401;
+pub const TCSETS: ::c_ulong = 0x5402;
+pub const TCFLSH: ::c_ulong = 0x540B;
+pub const TIOCGPGRP: ::c_ulong = 0x540F;
+pub const TIOCSPGRP: ::c_ulong = 0x5410;
+pub const TIOCGWINSZ: ::c_ulong = 0x5413;
+pub const TIOCSWINSZ: ::c_ulong = 0x5414;
+
+// sys/select.h
+pub const FD_SETSIZE: usize = 1024;
+
+// sys/socket.h
+pub const AF_UNIX: ::c_int = 1;
+pub const AF_INET: ::c_int = 2;
+pub const AF_INET6: ::c_int = 10;
+pub const MSG_PEEK: ::c_int = 2;
+pub const SHUT_RD: ::c_int = 0;
+pub const SHUT_WR: ::c_int = 1;
+pub const SHUT_RDWR: ::c_int = 2;
+pub const SO_REUSEADDR: ::c_int = 2;
+pub const SO_ERROR: ::c_int = 4;
+pub const SO_BROADCAST: ::c_int = 6;
+pub const SO_SNDBUF: ::c_int = 7;
+pub const SO_RCVBUF: ::c_int = 8;
+pub const SO_KEEPALIVE: ::c_int = 9;
+pub const SO_LINGER: ::c_int = 13;
+pub const SO_REUSEPORT: ::c_int = 15;
+pub const SO_RCVTIMEO: ::c_int = 20;
+pub const SO_SNDTIMEO: ::c_int = 21;
+pub const SOCK_STREAM: ::c_int = 1;
+pub const SOCK_DGRAM: ::c_int = 2;
+pub const SOL_SOCKET: ::c_int = 1;
+
+// sys/wait.h
+pub const WNOHANG: ::c_int = 1;
+
+// termios.h
+pub const NCCS: usize = 32;
+
+// time.h
+pub const CLOCK_REALTIME: ::c_int = 1;
+pub const CLOCK_MONOTONIC: ::c_int = 4;
+
+// unistd.h
+pub const _SC_PAGESIZE: ::c_int = 30;
+pub const SEEK_SET: ::c_int = 0;
+pub const SEEK_CUR: ::c_int = 1;
+pub const SEEK_END: ::c_int = 2;
+pub const STDIN_FILENO: ::c_int = 0;
+pub const STDOUT_FILENO: ::c_int = 1;
+pub const STDERR_FILENO: ::c_int = 2;
+
+// wait.h
+pub fn WIFSTOPPED(status: ::c_int) -> bool {
+    (status & 0xff) == 0x7f
+}
+
+pub fn WSTOPSIG(status: ::c_int) -> ::c_int {
+    (status >> 8) & 0xff
+}
+
+pub fn WIFCONTINUED(status: ::c_int) -> bool {
+    status == 0xffff
+}
+
+pub fn WIFSIGNALED(status: ::c_int) -> bool {
+    ((status & 0x7f) + 1) as i8 >= 2
+}
+
+pub fn WTERMSIG(status: ::c_int) -> ::c_int {
+    status & 0x7f
+}
+
+pub fn WIFEXITED(status: ::c_int) -> bool {
+    (status & 0x7f) == 0
+}
+
+pub fn WEXITSTATUS(status: ::c_int) -> ::c_int {
+    (status >> 8) & 0xff
+}
+
+pub fn WCOREDUMP(status: ::c_int) -> bool {
+    (status & 0x80) != 0
+}
+
+// intentionally not public, only used for fd_set
+cfg_if! {
+    if #[cfg(target_pointer_width = "32")] {
+        const ULONG_SIZE: usize = 32;
+    } else if #[cfg(target_pointer_width = "64")] {
+        const ULONG_SIZE: usize = 64;
+    } else {
+        // Unknown target_pointer_width
+    }
+}
+
+extern {
+    // malloc.h
+    pub fn memalign(align: ::size_t, size: ::size_t) -> *mut ::c_void;
+
+    // pthread.h
+    pub fn pthread_atfork(prepare: ::Option<unsafe extern fn()>,
+                          parent: ::Option<unsafe extern fn()>,
+                          child: ::Option<unsafe extern fn()>) -> ::c_int;
+    pub fn pthread_create(tid: *mut ::pthread_t,
+                          attr: *const ::pthread_attr_t,
+                          start: extern fn(*mut ::c_void) -> *mut ::c_void,
+                          arg: *mut ::c_void) -> ::c_int;
+    pub fn pthread_condattr_setclock(attr: *mut pthread_condattr_t,
+                                     clock_id: ::clockid_t) -> ::c_int;
+
+    // signal.h
+    pub fn pthread_sigmask(how: ::c_int,
+                           set: *const ::sigset_t,
+                           oldset: *mut ::sigset_t) -> ::c_int;
+
+    // sys/epoll.h
+    pub fn epoll_create(size: ::c_int) -> ::c_int;
+    pub fn epoll_create1(flags: ::c_int) -> ::c_int;
+    pub fn epoll_wait(epfd: ::c_int,
+                      events: *mut ::epoll_event,
+                      maxevents: ::c_int,
+                      timeout: ::c_int) -> ::c_int;
+    pub fn epoll_ctl(epfd: ::c_int,
+                     op: ::c_int,
+                     fd: ::c_int,
+                     event: *mut ::epoll_event) -> ::c_int;
+
+    // sys/ioctl.h
+    pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
+
+    // sys/socket.h
+    pub fn bind(socket: ::c_int, address: *const ::sockaddr,
+                address_len: ::socklen_t) -> ::c_int;
+    pub fn recvfrom(socket: ::c_int, buf: *mut ::c_void, len: ::size_t,
+                    flags: ::c_int, addr: *mut ::sockaddr,
+                    addrlen: *mut ::socklen_t) -> ::ssize_t;
+
+    // sys/uio.h
+    pub fn readv(fd: ::c_int,
+                 iov: *const ::iovec,
+                 iovcnt: ::c_int) -> ::ssize_t;
+    pub fn writev(fd: ::c_int,
+                  iov: *const ::iovec,
+                  iovcnt: ::c_int) -> ::ssize_t;
+
+    // time.h
+    pub fn clock_gettime(clk_id: ::clockid_t, tp: *mut ::timespec) -> ::c_int;
+}