diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
index d2d8e4a..1e7f6c0 100644
--- a/.cargo_vcs_info.json
+++ b/.cargo_vcs_info.json
@@ -1,5 +1,5 @@
 {
   "git": {
-    "sha1": "b61d8c617a782688f81ccb8fe25919c20dcd374e"
+    "sha1": "8712132baa9c487b229ff1489859f3ea21c70432"
   }
 }
diff --git a/Cargo.toml b/Cargo.toml
index beae9d3..841a824 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@
 
 [package]
 name = "libc"
-version = "0.2.70"
+version = "0.2.71"
 authors = ["The Rust Project Developers"]
 build = "build.rs"
 exclude = ["/ci/*", "/azure-pipelines.yml"]
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index 6d9d5e4..f5a0d47 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -1,6 +1,6 @@
 [package]
 name = "libc"
-version = "0.2.70"
+version = "0.2.71"
 authors = ["The Rust Project Developers"]
 license = "MIT OR Apache-2.0"
 readme = "README.md"
diff --git a/METADATA b/METADATA
index 844ca1f..3bfc011 100644
--- a/METADATA
+++ b/METADATA
@@ -9,11 +9,11 @@
     type: GIT
     value: "https://github.com/rust-lang/libc"
   }
-  version: "0.2.70"
+  version: "0.2.71"
   license_type: NOTICE
   last_upgrade_date {
     year: 2020
     month: 5
-    day: 12
+    day: 26
   }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 8c4f6b1..6c4cbf7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -39,6 +39,8 @@
         #[allow(unused_imports)]
         use core::iter;
         #[allow(unused_imports)]
+        use core::ops;
+        #[allow(unused_imports)]
         use core::option;
     }
 }
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 04e0837..c03c644 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -2257,6 +2257,8 @@
 pub const TCP_NOPUSH: ::c_int = 4;
 pub const TCP_NOOPT: ::c_int = 8;
 pub const TCP_KEEPALIVE: ::c_int = 0x10;
+pub const TCP_KEEPINTVL: ::c_int = 0x101;
+pub const TCP_KEEPCNT: ::c_int = 0x102;
 /// Enable/Disable TCP Fastopen on this socket
 pub const TCP_FASTOPEN: ::c_int = 0x105;
 
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index d9dc4f2..db36184 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -349,6 +349,13 @@
 #[deprecated(since = "0.2.64", note = "Not stable across OS versions")]
 pub const RLIM_NLIMITS: ::rlim_t = 15;
 
+pub const NI_NOFQDN: ::c_int = 0x00000001;
+pub const NI_NUMERICHOST: ::c_int = 0x00000002;
+pub const NI_NAMEREQD: ::c_int = 0x00000004;
+pub const NI_NUMERICSERV: ::c_int = 0x00000008;
+pub const NI_DGRAM: ::c_int = 0x00000010;
+pub const NI_NUMERICSCOPE: ::c_int = 0x00000020;
+
 pub const Q_GETQUOTA: ::c_int = 0x700;
 pub const Q_SETQUOTA: ::c_int = 0x800;
 
diff --git a/src/unix/bsd/mod.rs b/src/unix/bsd/mod.rs
index 0d5d24c..a70c1d9 100644
--- a/src/unix/bsd/mod.rs
+++ b/src/unix/bsd/mod.rs
@@ -501,6 +501,10 @@
 pub const TIOCCBRK: ::c_uint = 0x2000747a;
 pub const TIOCSBRK: ::c_uint = 0x2000747b;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 f! {
     pub fn CMSG_FIRSTHDR(mhdr: *const ::msghdr) -> *mut ::cmsghdr {
         if (*mhdr).msg_controllen as usize >= ::mem::size_of::<::cmsghdr>() {
diff --git a/src/unix/bsd/netbsdlike/openbsd/mod.rs b/src/unix/bsd/netbsdlike/openbsd/mod.rs
index f77a424..47a5585 100644
--- a/src/unix/bsd/netbsdlike/openbsd/mod.rs
+++ b/src/unix/bsd/netbsdlike/openbsd/mod.rs
@@ -1150,12 +1150,14 @@
 pub const KERN_OSVERSION: ::c_int = 27;
 pub const KERN_SOMAXCONN: ::c_int = 28;
 pub const KERN_SOMINCONN: ::c_int = 29;
+#[deprecated(since = "0.2.71", note = "Removed in OpenBSD 6.0")]
 pub const KERN_USERMOUNT: ::c_int = 30;
 pub const KERN_NOSUIDCOREDUMP: ::c_int = 32;
 pub const KERN_FSYNC: ::c_int = 33;
 pub const KERN_SYSVMSG: ::c_int = 34;
 pub const KERN_SYSVSEM: ::c_int = 35;
 pub const KERN_SYSVSHM: ::c_int = 36;
+#[deprecated(since = "0.2.71", note = "Removed in OpenBSD 6.0")]
 pub const KERN_ARND: ::c_int = 37;
 pub const KERN_MSGBUFSIZE: ::c_int = 38;
 pub const KERN_MALLOCSTATS: ::c_int = 39;
diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
index 7df8065..e7b104e 100644
--- a/src/unix/haiku/mod.rs
+++ b/src/unix/haiku/mod.rs
@@ -1206,6 +1206,10 @@
 pub const TIOCMBIS: ::c_int = TCGETA + 22;
 pub const TIOCMBIC: ::c_int = TCGETA + 23;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 f! {
     pub fn FD_CLR(fd: ::c_int, set: *mut fd_set) -> () {
         let fd = fd as usize;
diff --git a/src/unix/hermit/mod.rs b/src/unix/hermit/mod.rs
index 66ee653..ae3fa22 100644
--- a/src/unix/hermit/mod.rs
+++ b/src/unix/hermit/mod.rs
@@ -939,6 +939,10 @@
 
 pub const WNOHANG: ::c_int = 0x00000001;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 f! {
     pub fn WEXITSTATUS(status: ::c_int) -> ::c_int {
         (status >> 8) & 0xff
diff --git a/src/unix/linux_like/android/mod.rs b/src/unix/linux_like/android/mod.rs
index b070e77..9cc1c77 100644
--- a/src/unix/linux_like/android/mod.rs
+++ b/src/unix/linux_like/android/mod.rs
@@ -1160,6 +1160,8 @@
 pub const TIOCMSET: ::c_int = 0x5418;
 pub const FIONREAD: ::c_int = 0x541B;
 pub const TIOCCONS: ::c_int = 0x541D;
+pub const TIOCSBRK: ::c_int = 0x5427;
+pub const TIOCCBRK: ::c_int = 0x5428;
 
 pub const ST_RDONLY: ::c_ulong = 1;
 pub const ST_NOSUID: ::c_ulong = 2;
@@ -2142,6 +2144,10 @@
 pub const ERANGE: ::c_int = 34;
 pub const EWOULDBLOCK: ::c_int = EAGAIN;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 f! {
     pub fn CMSG_NXTHDR(mhdr: *const msghdr,
                        cmsg: *const cmsghdr) -> *mut cmsghdr {
diff --git a/src/unix/linux_like/emscripten/mod.rs b/src/unix/linux_like/emscripten/mod.rs
index ead0ea1..7817021 100644
--- a/src/unix/linux_like/emscripten/mod.rs
+++ b/src/unix/linux_like/emscripten/mod.rs
@@ -1680,6 +1680,10 @@
 pub const ARPD_FLUSH: ::c_ushort = 0x03;
 pub const ATF_MAGIC: ::c_int = 0x80;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 f! {
     pub fn CMSG_NXTHDR(mhdr: *const msghdr,
                        cmsg: *const cmsghdr) -> *mut cmsghdr {
diff --git a/src/unix/linux_like/linux/gnu/b32/x86/mod.rs b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
index 1d29ac2..b1d306c 100644
--- a/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
@@ -543,6 +543,8 @@
 
 pub const PTRACE_GETFPXREGS: ::c_uint = 18;
 pub const PTRACE_SETFPXREGS: ::c_uint = 19;
+pub const PTRACE_SYSEMU: ::c_uint = 31;
+pub const PTRACE_SYSEMU_SINGLESTEP: ::c_uint = 32;
 
 pub const MCL_CURRENT: ::c_int = 0x0001;
 pub const MCL_FUTURE: ::c_int = 0x0002;
diff --git a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
index ef4f188..f48d659 100644
--- a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
@@ -721,6 +721,8 @@
 pub const PTRACE_GETREGS: ::c_uint = 12;
 pub const PTRACE_SETREGS: ::c_uint = 13;
 pub const PTRACE_PEEKSIGINFO_SHARED: ::c_uint = 1;
+pub const PTRACE_SYSEMU: ::c_uint = 31;
+pub const PTRACE_SYSEMU_SINGLESTEP: ::c_uint = 32;
 
 pub const MCL_CURRENT: ::c_int = 0x0001;
 pub const MCL_FUTURE: ::c_int = 0x0002;
diff --git a/src/unix/linux_like/linux/gnu/mod.rs b/src/unix/linux_like/linux/gnu/mod.rs
index 7c8208e..da9890e 100644
--- a/src/unix/linux_like/linux/gnu/mod.rs
+++ b/src/unix/linux_like/linux/gnu/mod.rs
@@ -465,6 +465,10 @@
 pub const RLIMIT_RTTIME: ::__rlimit_resource_t = 15;
 pub const RLIMIT_NLIMITS: ::__rlimit_resource_t = 16;
 
+pub const PRIO_PROCESS: ::__priority_which_t = 0;
+pub const PRIO_PGRP: ::__priority_which_t = 1;
+pub const PRIO_USER: ::__priority_which_t = 2;
+
 pub const MS_RMT_MASK: ::c_ulong = 0x02800051;
 
 pub const __UT_LINESIZE: usize = 32;
diff --git a/src/unix/linux_like/linux/musl/mod.rs b/src/unix/linux_like/linux/musl/mod.rs
index 539a27b..b251383 100644
--- a/src/unix/linux_like/linux/musl/mod.rs
+++ b/src/unix/linux_like/linux/musl/mod.rs
@@ -425,6 +425,10 @@
 pub const TIOCSBRK: ::c_int = 0x5427;
 pub const TIOCCBRK: ::c_int = 0x5428;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 extern "C" {
     pub fn sendmmsg(
         sockfd: ::c_int,
diff --git a/src/unix/linux_like/mod.rs b/src/unix/linux_like/mod.rs
index 445f624..df71ecb 100644
--- a/src/unix/linux_like/mod.rs
+++ b/src/unix/linux_like/mod.rs
@@ -50,6 +50,8 @@
         pub sin6_scope_id: u32,
     }
 
+    // The order of the `ai_addr` field in this struct is crucial
+    // for converting between the Rust and C types.
     pub struct addrinfo {
         pub ai_flags: ::c_int,
         pub ai_family: ::c_int,
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 1084d9a..55b892f 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -269,10 +269,6 @@
 pub const LOG_PRIMASK: ::c_int = 7;
 pub const LOG_FACMASK: ::c_int = 0x3f8;
 
-pub const PRIO_PROCESS: ::c_int = 0;
-pub const PRIO_PGRP: ::c_int = 1;
-pub const PRIO_USER: ::c_int = 2;
-
 pub const PRIO_MIN: ::c_int = -20;
 pub const PRIO_MAX: ::c_int = 20;
 
diff --git a/src/unix/newlib/aarch64/mod.rs b/src/unix/newlib/aarch64/mod.rs
index 7e1b2bb..3a68bf4 100644
--- a/src/unix/newlib/aarch64/mod.rs
+++ b/src/unix/newlib/aarch64/mod.rs
@@ -1,3 +1,4 @@
+pub type clock_t = ::c_long;
 pub type c_char = u8;
 pub type wchar_t = u32;
 
@@ -29,5 +30,13 @@
     }
 }
 
+pub const FIONBIO: ::c_ulong = 1;
+
+pub const POLLIN: ::c_short = 0x1;
+pub const POLLPRI: ::c_short = 0x2;
 pub const POLLOUT: ::c_short = 0x4;
+pub const POLLERR: ::c_short = 0x8;
 pub const POLLHUP: ::c_short = 0x10;
+pub const POLLNVAL: ::c_short = 0x20;
+
+pub const SOL_SOCKET: ::c_int = 65535;
diff --git a/src/unix/newlib/arm/mod.rs b/src/unix/newlib/arm/mod.rs
index 39cb425..27274f7 100644
--- a/src/unix/newlib/arm/mod.rs
+++ b/src/unix/newlib/arm/mod.rs
@@ -1,3 +1,4 @@
+pub type clock_t = ::c_long;
 pub type c_char = u8;
 pub type wchar_t = u32;
 
@@ -31,5 +32,13 @@
     }
 }
 
-pub const POLLOUT: ::c_short = 0x10;
+pub const FIONBIO: ::c_ulong = 1;
+
+pub const POLLIN: ::c_short = 0x1;
+pub const POLLPRI: ::c_short = 0x2;
 pub const POLLHUP: ::c_short = 0x4;
+pub const POLLERR: ::c_short = 0x8;
+pub const POLLOUT: ::c_short = 0x10;
+pub const POLLNVAL: ::c_short = 0x20;
+
+pub const SOL_SOCKET: ::c_int = 65535;
diff --git a/src/unix/newlib/mod.rs b/src/unix/newlib/mod.rs
index 0823f3b..5f53f61 100644
--- a/src/unix/newlib/mod.rs
+++ b/src/unix/newlib/mod.rs
@@ -1,6 +1,5 @@
 pub type blkcnt_t = i32;
 pub type blksize_t = i32;
-pub type clock_t = i32;
 pub type clockid_t = ::c_ulong;
 pub type dev_t = u32;
 pub type fsblkcnt_t = u64;
@@ -25,14 +24,23 @@
 pub type useconds_t = u32;
 
 s! {
+    // The order of the `ai_addr` field in this struct is crucial
+    // for converting between the Rust and C types.
     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: socklen_t,
-        pub ai_canonname: *mut ::c_char,
+
+        #[cfg(target_arch = "xtensa")]
         pub ai_addr: *mut sockaddr,
+
+        pub ai_canonname: *mut ::c_char,
+
+        #[cfg(not(target_arch = "xtensa"))]
+        pub ai_addr: *mut sockaddr,
+
         pub ai_next: *mut addrinfo,
     }
 
@@ -364,11 +372,6 @@
 pub const O_ACCMODE: ::c_int = 3;
 pub const O_CLOEXEC: ::c_int = 0x80000;
 
-pub const POLLIN: ::c_short = 0x1;
-pub const POLLPRI: ::c_short = 0x2;
-pub const POLLERR: ::c_short = 0x8;
-pub const POLLNVAL: ::c_short = 0x20;
-
 pub const RTLD_LAZY: ::c_int = 0x1;
 
 pub const STDIN_FILENO: ::c_int = 0;
@@ -379,7 +382,6 @@
 pub const SEEK_CUR: ::c_int = 1;
 pub const SEEK_END: ::c_int = 2;
 
-pub const FIONBIO: ::c_ulong = 1;
 pub const FIOCLEX: ::c_ulong = 0x20006601;
 pub const FIONCLEX: ::c_ulong = 0x20006602;
 
@@ -406,7 +408,6 @@
 pub const S_IWOTH: ::mode_t = 2;
 pub const S_IXOTH: ::mode_t = 1;
 
-pub const SOL_SOCKET: ::c_int = 65535;
 pub const SOL_TCP: ::c_int = 6;
 
 pub const PF_UNSPEC: ::c_int = 0;
@@ -547,6 +548,13 @@
 pub const EAI_NONAME: ::c_int = -305;
 pub const EAI_SOCKTYPE: ::c_int = -307;
 
+pub const EXIT_SUCCESS: ::c_int = 0;
+pub const EXIT_FAILURE: ::c_int = 1;
+
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 f! {
     pub fn FD_CLR(fd: ::c_int, set: *mut fd_set) -> () {
         let bits = ::mem::size_of_val(&(*set).fds_bits[0]) * 8;
@@ -698,6 +706,9 @@
     } else if #[cfg(target_arch = "aarch64")] {
         mod aarch64;
         pub use self::aarch64::*;
+    } else if #[cfg(target_arch = "xtensa")] {
+        mod xtensa;
+        pub use self::xtensa::*;
     } else {
         // Only tested on ARM so far. Other platforms might have different
         // definitions for types and constants.
diff --git a/src/unix/newlib/xtensa/mod.rs b/src/unix/newlib/xtensa/mod.rs
new file mode 100644
index 0000000..bf95d9c
--- /dev/null
+++ b/src/unix/newlib/xtensa/mod.rs
@@ -0,0 +1,97 @@
+pub type clock_t = ::c_ulong;
+pub type c_char = i8;
+pub type wchar_t = u32;
+
+pub type c_long = i32;
+pub type c_ulong = u32;
+
+s! {
+    pub struct cmsghdr {
+        pub cmsg_len: ::socklen_t,
+        pub cmsg_level: ::c_int,
+        pub cmsg_type: ::c_int,
+    }
+
+    pub struct msghdr {
+        pub msg_name: *mut ::c_void,
+        pub msg_namelen: ::socklen_t,
+        pub msg_iov: *mut ::iovec,
+        pub msg_iovlen: ::c_int,
+        pub msg_control: *mut ::c_void,
+        pub msg_controllen: ::socklen_t,
+        pub msg_flags: ::c_int,
+    }
+
+    pub struct sockaddr_un {
+        pub sun_family: ::sa_family_t,
+        pub sun_path: [::c_char; 108],
+    }
+
+    pub struct sockaddr {
+        pub sa_len: u8,
+        pub sa_family: ::sa_family_t,
+        pub sa_data: [::c_char; 14],
+    }
+
+    pub struct sockaddr_in6 {
+        pub sin6_len: u8,
+        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_in {
+        pub sin_len: u8,
+        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_storage {
+        pub s2_len: u8,
+        pub ss_family: ::sa_family_t,
+        pub s2_data1: [::c_char; 2],
+        pub s2_data2: [u32; 3],
+        pub s2_data3: [u32; 3],
+    }
+}
+
+pub const AF_UNIX: ::c_int = 1;
+
+pub const FIONBIO: ::c_ulong = 2147772030;
+
+pub const POLLIN: ::c_short = 1 << 0;
+pub const POLLRDNORM: ::c_short = 1 << 1;
+pub const POLLRDBAND: ::c_short = 1 << 2;
+pub const POLLPRI: ::c_short = POLLRDBAND;
+pub const POLLOUT: ::c_short = 1 << 3;
+pub const POLLWRNORM: ::c_short = POLLOUT;
+pub const POLLWRBAND: ::c_short = 1 << 4;
+pub const POLLERR: ::c_short = 1 << 5;
+pub const POLLHUP: ::c_short = 1 << 6;
+
+pub const SOL_SOCKET: ::c_int = 0xfff;
+
+extern "C" {
+    pub fn sendmsg(
+        s: ::c_int,
+        msg: *const ::msghdr,
+        flags: ::c_int,
+    ) -> ::ssize_t;
+    pub fn recvmsg(
+        s: ::c_int,
+        msg: *mut ::msghdr,
+        flags: ::c_int,
+    ) -> ::ssize_t;
+
+    pub fn writev(s: ::c_int, iov: *const ::iovec, iovcnt: ::c_int)
+        -> ::c_int;
+    pub fn readv(
+        fd: ::c_int,
+        iov: *const ::iovec,
+        iovcnt: ::c_int,
+    ) -> ::ssize_t;
+}
diff --git a/src/unix/redox/mod.rs b/src/unix/redox/mod.rs
index 7f66f1b..55f64ee 100644
--- a/src/unix/redox/mod.rs
+++ b/src/unix/redox/mod.rs
@@ -587,6 +587,23 @@
 pub const TIOCGWINSZ: ::c_ulong = 0x5413;
 pub const TIOCSWINSZ: ::c_ulong = 0x5414;
 
+// sys/mman.h
+pub const PROT_NONE: ::c_int = 0x0000;
+pub const PROT_READ: ::c_int = 0x0004;
+pub const PROT_WRITE: ::c_int = 0x0002;
+pub const PROT_EXEC: ::c_int = 0x0001;
+
+pub const MAP_SHARED: ::c_int = 0x0001;
+pub const MAP_PRIVATE: ::c_int = 0x0002;
+pub const MAP_ANON: ::c_int = 0x0020;
+pub const MAP_ANONYMOUS: ::c_int = MAP_ANON;
+pub const MAP_FIXED: ::c_int = 0x0010;
+pub const MAP_FAILED: *mut ::c_void = !0 as _;
+
+pub const MS_ASYNC: ::c_int = 0x0001;
+pub const MS_INVALIDATE: ::c_int = 0x0002;
+pub const MS_SYNC: ::c_int = 0x0004;
+
 // sys/select.h
 pub const FD_SETSIZE: usize = 1024;
 
@@ -806,6 +823,10 @@
 pub const _PC_SYMLINK_MAX: ::c_int = 19;
 pub const _PC_2_SYMLINKS: ::c_int = 20;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 // wait.h
 f! {
     pub fn WIFSTOPPED(status: ::c_int) -> bool {
@@ -934,6 +955,24 @@
     // sys/ioctl.h
     pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
 
+    // sys/mman.h
+    pub fn msync(
+        addr: *mut ::c_void,
+        len: ::size_t,
+        flags: ::c_int,
+    ) -> ::c_int;
+    pub fn mprotect(
+        addr: *mut ::c_void,
+        len: ::size_t,
+        prot: ::c_int,
+    ) -> ::c_int;
+    pub fn shm_open(
+        name: *const c_char,
+        oflag: ::c_int,
+        mode: mode_t,
+    ) -> ::c_int;
+    pub fn shm_unlink(name: *const ::c_char) -> ::c_int;
+
     // sys/resource.h
     pub fn getrlimit(resource: ::c_int, rlim: *mut ::rlimit) -> ::c_int;
     pub fn setrlimit(resource: ::c_int, rlim: *const ::rlimit) -> ::c_int;
diff --git a/src/unix/solarish/mod.rs b/src/unix/solarish/mod.rs
index ba959a7..b0eecf1 100644
--- a/src/unix/solarish/mod.rs
+++ b/src/unix/solarish/mod.rs
@@ -1995,6 +1995,10 @@
 pub const TIME_WAIT: i32 = 4;
 pub const TIME_ERROR: i32 = 5;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 f! {
     pub fn FD_CLR(fd: ::c_int, set: *mut fd_set) -> () {
         let bits = ::mem::size_of_val(&(*set).fds_bits[0]) * 8;
diff --git a/src/unix/uclibc/mod.rs b/src/unix/uclibc/mod.rs
index e57c43d..a68cb7a 100644
--- a/src/unix/uclibc/mod.rs
+++ b/src/unix/uclibc/mod.rs
@@ -1503,6 +1503,10 @@
 
 pub const FILENAME_MAX: ::c_uint = 4095;
 
+pub const PRIO_PROCESS: ::c_int = 0;
+pub const PRIO_PGRP: ::c_int = 1;
+pub const PRIO_USER: ::c_int = 2;
+
 f! {
     pub fn FD_CLR(fd: ::c_int, set: *mut fd_set) -> () {
         let fd = fd as usize;