19 pub type ssize_t = isize;  typedef
3405 fn __CMSG_LEN(cmsg: *const cmsghdr) -> ssize_t {  in __CMSG_LEN()
3579     ) -> ssize_t;  in sendto()
3633     ) -> ssize_t;  in readlinkat()
3686     pub fn read(fd: c_int, buf: *mut c_void, count: size_t) -> ssize_t;  in read()
3702     pub fn write(fd: c_int, buf: *const c_void, count: size_t) -> ssize_t;  in write()
3703     pub fn pread(fd: c_int, buf: *mut c_void, count: size_t, offset: off_t) -> ssize_t;  in pread()
3704     pub fn pwrite(fd: c_int, buf: *const c_void, count: size_t, offset: off_t) -> ssize_t;  in pwrite()
3852     pub fn send(socket: c_int, buf: *const c_void, len: size_t, flags: c_int) -> ssize_t;  in send()
3853     pub fn recv(socket: c_int, buf: *mut c_void, len: size_t, flags: c_int) -> ssize_t;  in recv()
3874     pub fn readlink(path: *const c_char, buf: *mut c_char, bufsz: size_t) -> ssize_t;  in readlink()
4047     ) -> ssize_t;  in msgrcv()
4055     pub fn readahead(fd: c_int, offset: off64_t, count: size_t) -> ssize_t;  in readahead()
4065     pub fn pwritev(fd: c_int, iov: *const crate::iovec, iovcnt: c_int, offset: off_t) -> ssize_t;  in pwritev()
4066     pub fn preadv(fd: c_int, iov: *const crate::iovec, iovcnt: c_int, offset: off_t) -> ssize_t;  in preadv()
4125     ) -> ssize_t;  in recvfrom()
4136     pub fn writev(fd: c_int, iov: *const crate::iovec, iovcnt: c_int) -> ssize_t;  in writev()
4137     pub fn readv(fd: c_int, iov: *const crate::iovec, iovcnt: c_int) -> ssize_t;  in readv()
4139     pub fn sendmsg(fd: c_int, msg: *const crate::msghdr, flags: c_int) -> ssize_t;  in sendmsg()
4140     pub fn recvmsg(fd: c_int, msg: *mut crate::msghdr, flags: c_int) -> ssize_t;  in recvmsg()
4166     pub fn tee(fd_in: c_int, fd_out: c_int, len: size_t, flags: c_uint) -> ssize_t;  in tee()
4175     ) -> ssize_t;  in splice()
4183         -> ssize_t;  in vmsplice()