Allow nix to compile on android targets

Author: roblabla

src/errno.rs

@@ -35,12 +35,18 @@ unsafe fn errno_location() -> *mut c_int {
     __errno()
 }
 
-#[cfg(any(target_os = "linux", target_os = "android"))]
+#[cfg(target_os = "linux")]
 unsafe fn errno_location() -> *mut c_int {
     extern { fn __errno_location() -> *mut c_int; }
     __errno_location()
 }
 
+#[cfg(target_os = "android")]
+unsafe fn errno_location() -> *mut c_int {
+    extern { fn __errno() -> *mut c_int; }
+    __errno()
+}
+
 /// Sets the platform-specific errno to no-error
 unsafe fn clear() -> () {
     *errno_location() = 0;

src/sys/signal.rs

@@ -198,6 +198,7 @@ pub const SIGIOT : Signal = SIGABRT;
 pub const SIGPOLL : Signal = SIGIO;
 pub const SIGUNUSED : Signal = SIGSYS;
 
+#[cfg(not(target_os = "android"))]
 libc_bitflags!{
     pub flags SaFlags: libc::c_int {
         SA_NOCLDSTOP,
@@ -210,6 +211,35 @@ libc_bitflags!{
     }
 }
 
+// On 64-bit android, sa_flags is c_uint while on 32-bit android, it is
+// c_ulong.
+// FIXME: https://github.com/rust-lang/libc/pull/511
+#[cfg(all(target_os = "android", target_pointer_width = "32"))]
+libc_bitflags!{
+    pub flags SaFlags: libc::c_ulong {
+        SA_NOCLDSTOP as libc::c_ulong,
+        SA_NOCLDWAIT as libc::c_ulong,
+        SA_NODEFER as libc::c_ulong,
+        SA_ONSTACK as libc::c_ulong,
+        SA_RESETHAND as libc::c_ulong,
+        SA_RESTART as libc::c_ulong,
+        SA_SIGINFO as libc::c_ulong,
+    }
+}
+
+#[cfg(all(target_os = "android", target_pointer_width = "64"))]
+libc_bitflags!{
+    pub flags SaFlags: libc::c_uint {
+        SA_NOCLDSTOP as libc::c_uint,
+        SA_NOCLDWAIT as libc::c_uint,
+        SA_NODEFER as libc::c_uint,
+        SA_ONSTACK as libc::c_uint,
+        SA_RESETHAND as libc::c_uint,
+        SA_RESTART as libc::c_uint,
+        SA_SIGINFO as libc::c_uint,
+    }
+}
+
 #[repr(i32)]
 #[derive(Clone, Copy, PartialEq)]
 pub enum SigmaskHow {

src/sys/socket/consts.rs

@@ -40,10 +40,8 @@ mod os {
     pub const SO_LINGER: c_int = libc::SO_LINGER;
     pub const SO_MARK: c_int = libc::SO_MARK;
     pub const SO_OOBINLINE: c_int = libc::SO_OOBINLINE;
-    #[cfg(not(target_arch="arm"))]
     pub const SO_PASSCRED: c_int = libc::SO_PASSCRED;
     pub const SO_PEEK_OFF: c_int = libc::SO_PEEK_OFF;
-    #[cfg(not(target_arch="arm"))]
     pub const SO_PEERCRED: c_int = libc::SO_PEERCRED;
     pub const SO_PRIORITY: c_int = libc::SO_PRIORITY;
     pub const SO_PROTOCOL: c_int = libc::SO_PROTOCOL;
@@ -57,7 +55,6 @@ mod os {
     pub const SO_REUSEPORT: c_int = libc::SO_REUSEPORT;
     pub const SO_RXQ_OVFL: c_int = libc::SO_RXQ_OVFL;
     pub const SO_SNDBUF: c_int = libc::SO_SNDBUF;
-    #[cfg(not(target_arch="arm"))]
     pub const SO_SNDBUFFORCE: c_int = libc::SO_SNDBUFFORCE;
     pub const SO_TIMESTAMP: c_int = libc::SO_TIMESTAMP;
     pub const SO_TYPE: c_int = libc::SO_TYPE;

src/sys/socket/mod.rs

@@ -394,6 +394,7 @@ pub fn listen(sockfd: RawFd, backlog: usize) -> Result<()> {
 /// Bind a name to a socket
 ///
 /// [Further reading](http://man7.org/linux/man-pages/man2/bind.2.html)
+#[cfg(not(all(target_os="android", target_pointer_width="64")))]
 pub fn bind(fd: RawFd, addr: &SockAddr) -> Result<()> {
     let res = unsafe {
         let (ptr, len) = addr.as_ffi_pair();
@@ -403,6 +404,21 @@ pub fn bind(fd: RawFd, addr: &SockAddr) -> Result<()> {
     Errno::result(res).map(drop)
 }
 
+/// Bind a name to a socket
+///
+/// [Further reading](http://man7.org/linux/man-pages/man2/bind.2.html)
+// Android has some weirdness. Its 64-bit bind takes a c_int instead of a
+// socklen_t
+#[cfg(all(target_os="android", target_pointer_width="64"))]
+pub fn bind(fd: RawFd, addr: &SockAddr) -> Result<()> {
+    let res = unsafe {
+        let (ptr, len) = addr.as_ffi_pair();
+        ffi::bind(fd, ptr, len as c_int)
+    };
+
+    Errno::result(res).map(drop)
+}
+
 /// Accept a connection on a socket
 ///
 /// [Further reading](http://man7.org/linux/man-pages/man2/accept.2.html)

src/sys/termios.rs

@@ -39,7 +39,6 @@ mod ffi {
     pub use self::non_android::*;
 
     // On Android before 5.0, Bionic directly inline these to ioctl() calls.
-    #[inline]
     #[cfg(all(target_os = "android", not(target_arch = "mips")))]
     mod android {
         use libc;