Update libc crate to 0.2.23

The 'libc' create got a couple of updates. This change imports the new
code and bumps the version to use.

Import subrepo libc/:libc at 7db3fd570dfb41a38fb17116e93679307178103a

9 files changed, 164 insertions, 89 deletions

diff --git a/libc/src/unix/bsd/apple/b64.rs b/libc/src/unix/bsd/apple/b64.rs
index 327a4b6..3f83230 100644
--- a/libc/src/unix/bsd/apple/b64.rs
+++ b/libc/src/unix/bsd/apple/b64.rs
@@ -17,3 +17,5 @@ pub const __PTHREAD_RWLOCK_SIZE__: usize = 192;
 
 pub const TIOCTIMESTAMP: ::c_ulong = 0x40107459;
 pub const TIOCDCDTIMESTAMP: ::c_ulong = 0x40107458;
+
+pub const FIONREAD: ::c_ulong = 0x4004667f;
diff --git a/libc/src/unix/bsd/apple/mod.rs b/libc/src/unix/bsd/apple/mod.rs
index 132b69d..6f0c55b 100644
--- a/libc/src/unix/bsd/apple/mod.rs
+++ b/libc/src/unix/bsd/apple/mod.rs
@@ -665,6 +665,12 @@ pub const F_ALLOCATEALL: ::c_uint = 0x04;
 pub const F_PEOFPOSMODE: ::c_int = 3;
 pub const F_VOLPOSMODE: ::c_int = 4;
 
+pub const AT_FDCWD: ::c_int = -2;
+pub const AT_EACCESS: ::c_int = 0x0010;
+pub const AT_SYMLINK_NOFOLLOW: ::c_int = 0x0020;
+pub const AT_SYMLINK_FOLLOW: ::c_int = 0x0040;
+pub const AT_REMOVEDIR: ::c_int = 0x0080;
+
 pub const O_ACCMODE: ::c_int = 3;
 
 pub const TIOCMODG: ::c_ulong = 0x40047403;
@@ -1510,6 +1516,13 @@ pub const P_ALL: idtype_t = 0;
 pub const P_PID: idtype_t = 1;
 pub const P_PGID: idtype_t = 2;
 
+pub const XATTR_NOFOLLOW: ::c_int = 0x0001;
+pub const XATTR_CREATE: ::c_int = 0x0002;
+pub const XATTR_REPLACE: ::c_int = 0x0004;
+pub const XATTR_NOSECURITY: ::c_int = 0x0008;
+pub const XATTR_NODEFAULT: ::c_int = 0x0010;
+pub const XATTR_SHOWCOMPRESSION: ::c_int = 0x0020;
+
 f! {
     pub fn WSTOPSIG(status: ::c_int) -> ::c_int {
         status >> 8
@@ -1659,32 +1672,26 @@ extern {
     pub fn getpriority(which: ::c_int, who: ::id_t) -> ::c_int;
     pub fn setpriority(which: ::c_int, who: ::id_t, prio: ::c_int) -> ::c_int;
 
-    pub fn openat(dirfd: ::c_int, pathname: *const ::c_char,
-                  flags: ::c_int, ...) -> ::c_int;
-    pub fn faccessat(dirfd: ::c_int, pathname: *const ::c_char,
-                     mode: ::c_int, flags: ::c_int) -> ::c_int;
-    pub fn fchmodat(dirfd: ::c_int, pathname: *const ::c_char,
-                    mode: ::mode_t, flags: ::c_int) -> ::c_int;
-    pub fn fchownat(dirfd: ::c_int, pathname: *const ::c_char,
-                    owner: ::uid_t, group: ::gid_t,
+    pub fn getxattr(path: *const ::c_char, name: *const ::c_char,
+                    value: *mut ::c_void, size: ::size_t, position: u32,
+                    flags: ::c_int) -> ::ssize_t;
+    pub fn fgetxattr(filedes: ::c_int, name: *const ::c_char,
+                     value: *mut ::c_void, size: ::size_t, position: u32,
+                     flags: ::c_int) -> ::ssize_t;
+    pub fn setxattr(path: *const ::c_char, name: *const ::c_char,
+                    value: *const ::c_void, size: ::size_t, position: u32,
                     flags: ::c_int) -> ::c_int;
-    #[cfg_attr(target_os = "macos", link_name = "fstatat$INODE64")]
-    pub fn fstatat(dirfd: ::c_int, pathname: *const ::c_char,
-                   buf: *mut stat, flags: ::c_int) -> ::c_int;
-    pub fn linkat(olddirfd: ::c_int, oldpath: *const ::c_char,
-                  newdirfd: ::c_int, newpath: *const ::c_char,
-                  flags: ::c_int) -> ::c_int;
-   pub fn mkdirat(dirfd: ::c_int, pathname: *const ::c_char,
-                  mode: ::mode_t) -> ::c_int;
-   pub fn readlinkat(dirfd: ::c_int, pathname: *const ::c_char,
-                     buf: *mut ::c_char, bufsiz: ::size_t) -> ::ssize_t;
-   pub fn renameat(olddirfd: ::c_int, oldpath: *const ::c_char,
-                   newdirfd: ::c_int, newpath: *const ::c_char)
-                   -> ::c_int;
-   pub fn symlinkat(target: *const ::c_char, newdirfd: ::c_int,
-                    linkpath: *const ::c_char) -> ::c_int;
-   pub fn unlinkat(dirfd: ::c_int, pathname: *const ::c_char,
-                   flags: ::c_int) -> ::c_int;
+    pub fn fsetxattr(filedes: ::c_int, name: *const ::c_char,
+                     value: *const ::c_void, size: ::size_t, position: u32,
+                     flags: ::c_int) -> ::c_int;
+    pub fn listxattr(path: *const ::c_char, list: *mut ::c_char,
+                     size: ::size_t, flags: ::c_int) -> ::ssize_t;
+    pub fn flistxattr(filedes: ::c_int, list: *mut ::c_char,
+                      size: ::size_t, flags: ::c_int) -> ::ssize_t;
+    pub fn removexattr(path: *const ::c_char, name: *const ::c_char,
+                       flags: ::c_int) -> ::c_int;
+    pub fn fremovexattr(filedes: ::c_int, name: *const ::c_char,
+                        flags: ::c_int) -> ::c_int;
 
     pub fn initgroups(user: *const ::c_char, basegroup: ::c_int) -> ::c_int;
 
diff --git a/libc/src/unix/bsd/freebsdlike/freebsd/mod.rs b/libc/src/unix/bsd/freebsdlike/freebsd/mod.rs
index aecf228..fb113de 100644
--- a/libc/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/libc/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -11,6 +11,10 @@ pub type fsblkcnt_t = ::uint64_t;
 pub type fsfilcnt_t = ::uint64_t;
 pub type idtype_t = ::c_uint;
 
+pub type key_t = ::c_long;
+pub type msglen_t = ::c_ulong;
+pub type msgqnum_t = ::c_ulong;
+
 s! {
     pub struct utmpx {
         pub ut_type: ::c_short,
@@ -88,6 +92,41 @@ s! {
     pub struct _sem {
         data: [u32; 4],
     }
+
+    pub struct ipc_perm {
+        pub cuid: ::uid_t,
+        pub cgid: ::gid_t,
+        pub uid: ::uid_t,
+        pub gid: ::gid_t,
+        pub mode: ::mode_t,
+        pub seq: ::c_ushort,
+        pub key: ::key_t,
+    }
+
+    pub struct msqid_ds {
+        pub msg_perm: ::ipc_perm,
+        __unused1: *mut ::c_void,
+        __unused2: *mut ::c_void,
+        pub msg_cbytes: ::msglen_t,
+        pub msg_qnum: ::msgqnum_t,
+        pub msg_qbytes: ::msglen_t,
+        pub msg_lspid: ::pid_t,
+        pub msg_lrpid: ::pid_t,
+        pub msg_stime: ::time_t,
+        pub msg_rtime: ::time_t,
+        pub msg_ctime: ::time_t,
+    }
+
+    pub struct shmid_ds {
+        pub shm_perm: ::ipc_perm,
+        pub shm_segsz: ::size_t,
+        pub shm_lpid: ::pid_t,
+        pub shm_cpid: ::pid_t,
+        pub shm_nattch: ::c_int,
+        pub shm_atime: ::time_t,
+        pub shm_dtime: ::time_t,
+        pub shm_ctime: ::time_t,
+    }
 }
 
 pub const SIGEV_THREAD_ID: ::c_int = 4;
@@ -368,6 +407,8 @@ pub const AF_INET6_SDP: ::c_int = 42;
 #[doc(hidden)]
 pub const AF_MAX: ::c_int = 42;
 
+pub const IPPROTO_DIVERT: ::c_int = 258;
+
 pub const PF_SLOW: ::c_int = AF_SLOW;
 pub const PF_SCLUSTER: ::c_int = AF_SCLUSTER;
 pub const PF_ARP: ::c_int = AF_ARP;
@@ -384,6 +425,28 @@ pub const NET_RT_IFLIST: ::c_int = 3;
 pub const NET_RT_IFMALIST: ::c_int = 4;
 pub const NET_RT_IFLISTL: ::c_int = 5;
 
+// System V IPC
+pub const IPC_PRIVATE: ::key_t = 0;
+pub const IPC_CREAT: ::c_int = 0o1000;
+pub const IPC_EXCL: ::c_int = 0o2000;
+pub const IPC_NOWAIT: ::c_int = 0o4000;
+pub const IPC_RMID: ::c_int = 0;
+pub const IPC_SET: ::c_int = 1;
+pub const IPC_STAT: ::c_int = 2;
+pub const IPC_INFO: ::c_int = 3;
+pub const IPC_R : ::c_int = 0o400;
+pub const IPC_W : ::c_int = 0o200;
+pub const IPC_M : ::c_int = 0o10000;
+pub const MSG_NOERROR: ::c_int = 0o10000;
+pub const SHM_RDONLY: ::c_int = 0o10000;
+pub const SHM_RND: ::c_int = 0o20000;
+pub const SHM_R: ::c_int = 0o400;
+pub const SHM_W: ::c_int = 0o200;
+pub const SHM_LOCK: ::c_int = 11;
+pub const SHM_UNLOCK: ::c_int = 12;
+pub const SHM_STAT: ::c_int = 13;
+pub const SHM_INFO: ::c_int = 14;
+
 // The *_MAXID constants never should've been used outside of the
 // FreeBSD base system.  And with the exception of CTL_P1003_1B_MAXID,
 // they were all removed in svn r262489.  They remain here for backwards
@@ -442,6 +505,9 @@ pub const P_PID: idtype_t = 0;
 pub const P_PGID: idtype_t = 2;
 pub const P_ALL: idtype_t = 7;
 
+pub const B460800: ::speed_t = 460800;
+pub const B921600: ::speed_t = 921600;
+
 extern {
     pub fn __error() -> *mut ::c_int;
 
@@ -478,6 +544,21 @@ extern {
     pub fn freelocale(loc: ::locale_t) -> ::c_int;
     pub fn waitid(idtype: idtype_t, id: ::id_t, infop: *mut ::siginfo_t,
                   options: ::c_int) -> ::c_int;
+
+    pub fn ftok(pathname: *const ::c_char, proj_id: ::c_int) -> ::key_t;
+    pub fn shmget(key: ::key_t, size: ::size_t, shmflg: ::c_int) -> ::c_int;
+    pub fn shmat(shmid: ::c_int, shmaddr: *const ::c_void,
+        shmflg: ::c_int) -> *mut ::c_void;
+    pub fn shmdt(shmaddr: *const ::c_void) -> ::c_int;
+    pub fn shmctl(shmid: ::c_int, cmd: ::c_int,
+        buf: *mut ::shmid_ds) -> ::c_int;
+    pub fn msgctl(msqid: ::c_int, cmd: ::c_int,
+        buf: *mut ::msqid_ds) -> ::c_int;
+    pub fn msgget(key: ::key_t, msgflg: ::c_int) -> ::c_int;
+    pub fn msgrcv(msqid: ::c_int, msgp: *mut ::c_void, msgsz: ::size_t,
+        msgtyp: ::c_long, msgflg: ::c_int) -> ::c_int;
+    pub fn msgsnd(msqid: ::c_int, msgp: *const ::c_void, msgsz: ::size_t,
+        msgflg: ::c_int) -> ::c_int;
 }
 
 cfg_if! {
diff --git a/libc/src/unix/bsd/freebsdlike/mod.rs b/libc/src/unix/bsd/freebsdlike/mod.rs
index f9c8dcb..daf3f29 100644
--- a/libc/src/unix/bsd/freebsdlike/mod.rs
+++ b/libc/src/unix/bsd/freebsdlike/mod.rs
@@ -452,6 +452,11 @@ pub const F_SETFD: ::c_int = 2;
 pub const F_GETFL: ::c_int = 3;
 pub const F_SETFL: ::c_int = 4;
 
+pub const AT_EACCESS: ::c_int = 0x100;
+pub const AT_SYMLINK_NOFOLLOW: ::c_int = 0x200;
+pub const AT_SYMLINK_FOLLOW: ::c_int = 0x400;
+pub const AT_REMOVEDIR: ::c_int = 0x800;
+
 pub const SIGTRAP: ::c_int = 5;
 
 pub const GLOB_APPEND  : ::c_int = 0x0001;
@@ -864,13 +869,15 @@ pub const B57600: speed_t = 57600;
 pub const B76800: speed_t = 76800;
 pub const B115200: speed_t = 115200;
 pub const B230400: speed_t = 230400;
-pub const B460800: speed_t = 460800;
-pub const B921600: speed_t = 921600;
 pub const EXTA: speed_t = 19200;
 pub const EXTB: speed_t = 38400;
 
 pub const SEM_FAILED: *mut sem_t = 0 as *mut sem_t;
 
+pub const CRTSCTS: ::tcflag_t = 0x00030000;
+
+pub const AT_FDCWD: ::c_int = -100;
+
 f! {
     pub fn WIFCONTINUED(status: ::c_int) -> bool {
         status == 0x13
@@ -980,6 +987,8 @@ extern {
                      base: ::locale_t) -> ::locale_t;
     pub fn uselocale(loc: ::locale_t) -> ::locale_t;
     pub fn querylocale(mask: ::c_int, loc: ::locale_t) -> *const ::c_char;
+    pub fn accept4(s: ::c_int, addr: *mut ::sockaddr,
+                   addrlen: *mut ::socklen_t, flags: ::c_int) -> ::c_int;
     pub fn pthread_set_name_np(tid: ::pthread_t, name: *const ::c_char);
     pub fn pthread_attr_get_np(tid: ::pthread_t,
                                attr: *mut ::pthread_attr_t) -> ::c_int;
@@ -999,35 +1008,12 @@ extern {
     pub fn getpriority(which: ::c_int, who: ::c_int) -> ::c_int;
     pub fn setpriority(which: ::c_int, who: ::c_int, prio: ::c_int) -> ::c_int;
 
-    pub fn openat(dirfd: ::c_int, pathname: *const ::c_char,
-                  flags: ::c_int, ...) -> ::c_int;
-    pub fn faccessat(dirfd: ::c_int, pathname: *const ::c_char,
-                     mode: ::c_int, flags: ::c_int) -> ::c_int;
-    pub fn fchmodat(dirfd: ::c_int, pathname: *const ::c_char,
-                    mode: ::mode_t, flags: ::c_int) -> ::c_int;
-    pub fn fchownat(dirfd: ::c_int, pathname: *const ::c_char,
-                    owner: ::uid_t, group: ::gid_t,
-                    flags: ::c_int) -> ::c_int;
-    pub fn fstatat(dirfd: ::c_int, pathname: *const ::c_char,
-                   buf: *mut stat, flags: ::c_int) -> ::c_int;
-    pub fn linkat(olddirfd: ::c_int, oldpath: *const ::c_char,
-                  newdirfd: ::c_int, newpath: *const ::c_char,
-                  flags: ::c_int) -> ::c_int;
-   pub fn mkdirat(dirfd: ::c_int, pathname: *const ::c_char,
-                  mode: ::mode_t) -> ::c_int;
-   pub fn mknodat(dirfd: ::c_int, pathname: *const ::c_char,
-                 mode: ::mode_t, dev: dev_t) -> ::c_int;
-   pub fn readlinkat(dirfd: ::c_int, pathname: *const ::c_char,
-                     buf: *mut ::c_char, bufsiz: ::size_t) -> ::ssize_t;
-   pub fn renameat(olddirfd: ::c_int, oldpath: *const ::c_char,
-                   newdirfd: ::c_int, newpath: *const ::c_char)
-                   -> ::c_int;
-   pub fn symlinkat(target: *const ::c_char, newdirfd: ::c_int,
-                    linkpath: *const ::c_char) -> ::c_int;
-   pub fn unlinkat(dirfd: ::c_int, pathname: *const ::c_char,
-                   flags: ::c_int) -> ::c_int;
-   pub fn mkfifoat(dirfd: ::c_int, pathname: *const ::c_char,
-                   mode: ::mode_t) -> ::c_int;
+    pub fn fdopendir(fd: ::c_int) -> *mut ::DIR;
+
+    pub fn mknodat(dirfd: ::c_int, pathname: *const ::c_char,
+                  mode: ::mode_t, dev: dev_t) -> ::c_int;
+    pub fn mkfifoat(dirfd: ::c_int, pathname: *const ::c_char,
+                    mode: ::mode_t) -> ::c_int;
     pub fn pthread_condattr_getclock(attr: *const pthread_condattr_t,
                                      clock_id: *mut clockid_t) -> ::c_int;
     pub fn pthread_condattr_setclock(attr: *mut pthread_condattr_t,
diff --git a/libc/src/unix/bsd/mod.rs b/libc/src/unix/bsd/mod.rs
index 69c7138..96b0f22 100644
--- a/libc/src/unix/bsd/mod.rs
+++ b/libc/src/unix/bsd/mod.rs
@@ -275,7 +275,9 @@ pub const WNOHANG: ::c_int = 0x00000001;
 pub const WUNTRACED: ::c_int = 0x00000002;
 
 pub const RTLD_NOW: ::c_int = 0x2;
+pub const RTLD_NEXT: *mut ::c_void = -1isize as *mut ::c_void;
 pub const RTLD_DEFAULT: *mut ::c_void = -2isize as *mut ::c_void;
+pub const RTLD_SELF: *mut ::c_void = -3isize as *mut ::c_void;
 
 pub const LOG_CRON: ::c_int = 9 << 3;
 pub const LOG_AUTHPRIV: ::c_int = 10 << 3;
diff --git a/libc/src/unix/bsd/netbsdlike/mod.rs b/libc/src/unix/bsd/netbsdlike/mod.rs
index d4f0ded..1471e6f 100644
--- a/libc/src/unix/bsd/netbsdlike/mod.rs
+++ b/libc/src/unix/bsd/netbsdlike/mod.rs
@@ -597,39 +597,16 @@ extern {
     pub fn getpriority(which: ::c_int, who: ::id_t) -> ::c_int;
     pub fn setpriority(which: ::c_int, who: ::id_t, prio: ::c_int) -> ::c_int;
 
-    pub fn openat(dirfd: ::c_int, pathname: *const ::c_char,
-                  flags: ::c_int, ...) -> ::c_int;
-    pub fn faccessat(dirfd: ::c_int, pathname: *const ::c_char,
-                     mode: ::c_int, flags: ::c_int) -> ::c_int;
-    pub fn fchmodat(dirfd: ::c_int, pathname: *const ::c_char,
-                    mode: ::mode_t, flags: ::c_int) -> ::c_int;
-    pub fn fchownat(dirfd: ::c_int, pathname: *const ::c_char,
-                    owner: ::uid_t, group: ::gid_t,
-                    flags: ::c_int) -> ::c_int;
-    pub fn fstatat(dirfd: ::c_int, pathname: *const ::c_char,
-                   buf: *mut stat, flags: ::c_int) -> ::c_int;
-    pub fn linkat(olddirfd: ::c_int, oldpath: *const ::c_char,
-                  newdirfd: ::c_int, newpath: *const ::c_char,
-                  flags: ::c_int) -> ::c_int;
-   pub fn mkdirat(dirfd: ::c_int, pathname: *const ::c_char,
-                  mode: ::mode_t) -> ::c_int;
-   pub fn mknodat(dirfd: ::c_int, pathname: *const ::c_char,
-                 mode: ::mode_t, dev: dev_t) -> ::c_int;
-   pub fn readlinkat(dirfd: ::c_int, pathname: *const ::c_char,
-                     buf: *mut ::c_char, bufsiz: ::size_t) -> ::ssize_t;
-   pub fn renameat(olddirfd: ::c_int, oldpath: *const ::c_char,
-                   newdirfd: ::c_int, newpath: *const ::c_char)
-                   -> ::c_int;
-   pub fn symlinkat(target: *const ::c_char, newdirfd: ::c_int,
-                    linkpath: *const ::c_char) -> ::c_int;
-   pub fn unlinkat(dirfd: ::c_int, pathname: *const ::c_char,
-                   flags: ::c_int) -> ::c_int;
-   pub fn mkfifoat(dirfd: ::c_int, pathname: *const ::c_char,
-                   mode: ::mode_t) -> ::c_int;
-   pub fn sem_timedwait(sem: *mut sem_t,
-                        abstime: *const ::timespec) -> ::c_int;
-   pub fn pthread_condattr_setclock(attr: *mut pthread_condattr_t,
-                                    clock_id: clockid_t) -> ::c_int;
+    pub fn fdopendir(fd: ::c_int) -> *mut ::DIR;
+
+    pub fn mknodat(dirfd: ::c_int, pathname: *const ::c_char,
+                   mode: ::mode_t, dev: dev_t) -> ::c_int;
+    pub fn mkfifoat(dirfd: ::c_int, pathname: *const ::c_char,
+                    mode: ::mode_t) -> ::c_int;
+    pub fn sem_timedwait(sem: *mut sem_t,
+                         abstime: *const ::timespec) -> ::c_int;
+    pub fn pthread_condattr_setclock(attr: *mut pthread_condattr_t,
+                                     clock_id: clockid_t) -> ::c_int;
     pub fn sethostname(name: *const ::c_char, len: ::size_t) -> ::c_int;
     pub fn pthread_mutex_timedlock(lock: *mut pthread_mutex_t,
                                    abstime: *const ::timespec) -> ::c_int;
diff --git a/libc/src/unix/bsd/netbsdlike/netbsd/mod.rs b/libc/src/unix/bsd/netbsdlike/netbsd/mod.rs
index a329cdf..ffe8d75 100644
--- a/libc/src/unix/bsd/netbsdlike/netbsd/mod.rs
+++ b/libc/src/unix/bsd/netbsdlike/netbsd/mod.rs
@@ -246,6 +246,12 @@ s! {
     }
 }
 
+pub const AT_FDCWD: ::c_int = -100;
+pub const AT_EACCESS: ::c_int = 0x100;
+pub const AT_SYMLINK_NOFOLLOW: ::c_int = 0x200;
+pub const AT_SYMLINK_FOLLOW: ::c_int = 0x400;
+pub const AT_REMOVEDIR: ::c_int = 0x800;
+
 pub const LC_COLLATE_MASK: ::c_int = (1 << ::LC_COLLATE);
 pub const LC_CTYPE_MASK: ::c_int = (1 << ::LC_CTYPE);
 pub const LC_MONETARY_MASK: ::c_int = (1 << ::LC_MONETARY);
@@ -635,6 +641,9 @@ pub const P_ALL: idtype_t = 0;
 pub const P_PID: idtype_t = 1;
 pub const P_PGID: idtype_t = 4;
 
+pub const B460800: ::speed_t = 460800;
+pub const B921600: ::speed_t = 921600;
+
 extern {
     pub fn aio_read(aiocbp: *mut aiocb) -> ::c_int;
     pub fn aio_write(aiocbp: *mut aiocb) -> ::c_int;
diff --git a/libc/src/unix/bsd/netbsdlike/openbsdlike/mod.rs b/libc/src/unix/bsd/netbsdlike/openbsdlike/mod.rs
index 0e53ccd..b0d8128 100644
--- a/libc/src/unix/bsd/netbsdlike/openbsdlike/mod.rs
+++ b/libc/src/unix/bsd/netbsdlike/openbsdlike/mod.rs
@@ -157,6 +157,12 @@ pub const ELAST : ::c_int = 91;
 
 pub const F_DUPFD_CLOEXEC : ::c_int = 10;
 
+pub const AT_FDCWD: ::c_int = -100;
+pub const AT_EACCESS: ::c_int = 0x01;
+pub const AT_SYMLINK_NOFOLLOW: ::c_int = 0x02;
+pub const AT_SYMLINK_FOLLOW: ::c_int = 0x04;
+pub const AT_REMOVEDIR: ::c_int = 0x08;
+
 pub const RLIM_NLIMITS: ::c_int = 9;
 
 pub const SO_SNDTIMEO: ::c_int = 0x1005;
diff --git a/libc/src/unix/bsd/netbsdlike/openbsdlike/openbsd.rs b/libc/src/unix/bsd/netbsdlike/openbsdlike/openbsd.rs
index b7fed64..8b36ee5 100644
--- a/libc/src/unix/bsd/netbsdlike/openbsdlike/openbsd.rs
+++ b/libc/src/unix/bsd/netbsdlike/openbsdlike/openbsd.rs
@@ -26,3 +26,8 @@ s! {
         pub int_n_sign_posn: ::c_char,
     }
 }
+
+extern {
+    pub fn accept4(s: ::c_int, addr: *mut ::sockaddr,
+                   addrlen: *mut ::socklen_t, flags: ::c_int) -> ::c_int;
+}