Take sys/vxworks/{os,path,pipe} from sys/unix instead.

library/std/src/sys/unix/os.rs

@@ -37,7 +37,7 @@ cfg_if::cfg_if! {
 }
 
 extern "C" {
-    #[cfg(not(target_os = "dragonfly"))]
+    #[cfg(not(any(target_os = "dragonfly", target_os = "vxworks")))]
     #[cfg_attr(
         any(
             target_os = "linux",
@@ -67,18 +67,28 @@ extern "C" {
 }
 
 /// Returns the platform-specific value of errno
-#[cfg(not(target_os = "dragonfly"))]
+#[cfg(not(any(target_os = "dragonfly", target_os = "vxworks")))]
 pub fn errno() -> i32 {
     unsafe { (*errno_location()) as i32 }
 }
 
 /// Sets the platform-specific value of errno
-#[cfg(all(not(target_os = "linux"), not(target_os = "dragonfly")))] // needed for readdir and syscall!
+#[cfg(all(not(target_os = "linux"), not(target_os = "dragonfly"), not(target_os = "vxworks")))] // needed for readdir and syscall!
 #[allow(dead_code)] // but not all target cfgs actually end up using it
 pub fn set_errno(e: i32) {
     unsafe { *errno_location() = e as c_int }
 }
 
+#[cfg(target_os = "vxworks")]
+pub fn errno() -> i32 {
+    unsafe { libc::errnoGet() }
+}
+
+#[cfg(target_os = "vxworks")]
+pub fn set_errno(e: i32) {
+    unsafe { libc::errnoSet(e as c_int) };
+}
+
 #[cfg(target_os = "dragonfly")]
 pub fn errno() -> i32 {
     extern "C" {
@@ -439,6 +449,19 @@ pub fn current_exe() -> io::Result<PathBuf> {
     Err(io::Error::new(ErrorKind::Other, "Not yet implemented!"))
 }
 
+#[cfg(target_os = "vxworks")]
+pub fn current_exe() -> io::Result<PathBuf> {
+    #[cfg(test)]
+    use realstd::env;
+
+    #[cfg(not(test))]
+    use crate::env;
+
+    let exe_path = env::args().next().unwrap();
+    let path = path::Path::new(&exe_path);
+    path.canonicalize()
+}
+
 pub struct Env {
     iter: vec::IntoIter<(OsString, OsString)>,
     _dont_send_or_sync_me: PhantomData<*mut ()>,
@@ -568,7 +591,8 @@ pub fn home_dir() -> Option<PathBuf> {
         target_os = "android",
         target_os = "ios",
         target_os = "emscripten",
-        target_os = "redox"
+        target_os = "redox",
+        target_os = "vxworks"
     ))]
     unsafe fn fallback() -> Option<OsString> {
         None
@@ -577,7 +601,8 @@ pub fn home_dir() -> Option<PathBuf> {
         target_os = "android",
         target_os = "ios",
         target_os = "emscripten",
-        target_os = "redox"
+        target_os = "redox",
+        target_os = "vxworks"
     )))]
     unsafe fn fallback() -> Option<OsString> {
         let amt = match libc::sysconf(libc::_SC_GETPW_R_SIZE_MAX) {

library/std/src/sys/vxworks/mod.rs

@@ -34,8 +34,11 @@ pub mod memchr;
 pub mod mutex;
 #[path = "../unix/net.rs"]
 pub mod net;
+#[path = "../unix/os.rs"]
 pub mod os;
+#[path = "../unix/path.rs"]
 pub mod path;
+#[path = "../unix/pipe.rs"]
 pub mod pipe;
 pub mod process;
 pub mod rand;