Consolidate common EPOLL flags

EPOLLRDHUP, EPOLLRDUP, and EPOLLONESHOT have the same definition on all
linux-like platforms.

Author: rtzoeller

src/unix/linux_like/android/mod.rs

@@ -792,9 +792,6 @@ pub const EPROTO: ::c_int = 71;
 pub const EDOTDOT: ::c_int = 73;
 
 pub const EPOLL_CLOEXEC: ::c_int = 0x80000;
-pub const EPOLLONESHOT: ::c_int = 0x40000000;
-pub const EPOLLRDHUP: ::c_int = 0x00002000;
-pub const EPOLLWAKEUP: ::c_int = 0x20000000;
 
 // sys/eventfd.h
 pub const EFD_SEMAPHORE: ::c_int = 0x1;

src/unix/linux_like/emscripten/mod.rs

@@ -965,9 +965,7 @@ pub const SHM_UNLOCK: ::c_int = 12;
 pub const SHM_HUGETLB: ::c_int = 0o4000;
 pub const SHM_NORESERVE: ::c_int = 0o10000;
 
-pub const EPOLLRDHUP: ::c_int = 0x2000;
 pub const EPOLLEXCLUSIVE: ::c_int = 0x10000000;
-pub const EPOLLONESHOT: ::c_int = 0x40000000;
 
 pub const QFMT_VFS_OLD: ::c_int = 1;
 pub const QFMT_VFS_V0: ::c_int = 2;
@@ -1372,8 +1370,6 @@ pub const PTRACE_INTERRUPT: ::c_int = 0x4207;
 pub const PTRACE_LISTEN: ::c_int = 0x4208;
 pub const PTRACE_PEEKSIGINFO: ::c_int = 0x4209;
 
-pub const EPOLLWAKEUP: ::c_int = 0x20000000;
-
 pub const PTRACE_GETFPREGS: ::c_uint = 14;
 pub const PTRACE_SETFPREGS: ::c_uint = 15;
 pub const PTRACE_GETFPXREGS: ::c_uint = 18;

src/unix/linux_like/linux/mod.rs

@@ -1551,10 +1551,7 @@ pub const SHM_HUGETLB: ::c_int = 0o4000;
 #[cfg(not(all(target_env = "uclibc", target_arch = "mips")))]
 pub const SHM_NORESERVE: ::c_int = 0o10000;
 
-pub const EPOLLRDHUP: ::c_int = 0x2000;
 pub const EPOLLEXCLUSIVE: ::c_int = 0x10000000;
-pub const EPOLLWAKEUP: ::c_int = 0x20000000;
-pub const EPOLLONESHOT: ::c_int = 0x40000000;
 
 pub const QFMT_VFS_OLD: ::c_int = 1;
 pub const QFMT_VFS_V0: ::c_int = 2;

src/unix/linux_like/mod.rs

@@ -1035,6 +1035,9 @@ pub const EPOLLRDBAND: ::c_int = 0x80;
 pub const EPOLLWRNORM: ::c_int = 0x100;
 pub const EPOLLWRBAND: ::c_int = 0x200;
 pub const EPOLLMSG: ::c_int = 0x400;
+pub const EPOLLRDHUP: ::c_int = 0x2000;
+pub const EPOLLWAKEUP: ::c_int = 0x20000000;
+pub const EPOLLONESHOT: ::c_int = 0x40000000;
 pub const EPOLLET: ::c_int = 0x80000000;
 
 pub const EPOLL_CTL_ADD: ::c_int = 1;