Fix test and remove group & user for redox

 - Make sure all tests pass the CI
 - Redox does not (yet) have passwd functions, so remove it

Author: AdminXVII

src/sys/signal.rs

@@ -464,6 +464,7 @@ impl SigSet {
 
     /// Suspends execution of the calling thread until one of the signals in the
     /// signal mask becomes pending, and returns the accepted signal.
+    #[cfg(not(target_os = "redox"))] // RedoxFS does not yet support sigwait
     pub fn wait(&self) -> Result<Signal> {
         let mut signum = mem::MaybeUninit::uninit();
         let res = unsafe { libc::sigwait(&self.sigset as *const libc::sigset_t, signum.as_mut_ptr()) };

src/unistd.rs

@@ -10,9 +10,9 @@ use libc::{self, c_char, c_void, c_int, c_long, c_uint, size_t, pid_t, off_t,
            uid_t, gid_t, mode_t, PATH_MAX};
 use std::{fmt, mem, ptr};
 use std::convert::Infallible;
-use std::ffi::{CString, CStr, OsString};
+use std::ffi::{CStr, OsString};
 #[cfg(not(target_os = "redox"))]
-use std::ffi::OsStr;
+use std::ffi::{CString, OsStr};
 use std::os::unix::ffi::OsStringExt;
 #[cfg(not(target_os = "redox"))]
 use std::os::unix::ffi::OsStrExt;
@@ -525,7 +525,9 @@ pub fn mkfifo<P: ?Sized + NixPath>(path: &P, mode: Mode) -> Result<()> {
 /// [mkfifoat(2)](http://pubs.opengroup.org/onlinepubs/9699919799/functions/mkfifoat.html).
 // mkfifoat is not implemented in OSX or android
 #[inline]
-#[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "android")))]
+#[cfg(not(any(
+    target_os = "macos", target_os = "ios",
+    target_os = "android", target_os = "redox")))]
 pub fn mkfifoat<P: ?Sized + NixPath>(dirfd: Option<RawFd>, path: &P, mode: Mode) -> Result<()> {
     let res = path.with_nix_path(|cstr| unsafe {
         libc::mkfifoat(at_rawfd(dirfd), cstr.as_ptr(), mode.bits() as mode_t)
@@ -1205,6 +1207,7 @@ pub enum LinkatFlags {
 ///
 /// # References
 /// See also [linkat(2)](http://pubs.opengroup.org/onlinepubs/9699919799/functions/linkat.html)
+#[cfg(not(target_os = "redox"))] // RedoxFS does not support symlinks yet
 pub fn linkat<P: ?Sized + NixPath>(
     olddirfd: Option<RawFd>,
     oldpath: &P,
@@ -1327,7 +1330,6 @@ pub fn fsync(fd: RawFd) -> Result<()> {
 // TODO: exclude only Apple systems after https://github.com/rust-lang/libc/pull/211
 #[cfg(any(target_os = "linux",
           target_os = "android",
-          target_os = "redox",
           target_os = "emscripten"))]
 #[inline]
 pub fn fdatasync(fd: RawFd) -> Result<()> {
@@ -1662,6 +1664,7 @@ pub fn initgroups(user: &CStr, group: Gid) -> Result<()> {
 ///
 /// See also [pause(2)](http://pubs.opengroup.org/onlinepubs/9699919799/functions/pause.html).
 #[inline]
+#[cfg(not(target_os = "redox"))]
 pub fn pause() {
     unsafe { libc::pause() };
 }
@@ -2581,6 +2584,7 @@ pub fn access<P: ?Sized + NixPath>(path: &P, amode: AccessFlags) -> Result<()> {
 /// fields are based on the user's locale, which could be non-UTF8, while other fields are
 /// guaranteed to conform to [`NAME_REGEX`](https://serverfault.com/a/73101/407341), which only
 /// contains ASCII.
+#[cfg(not(target_os = "redox"))] // RedoxFS does not support passwd
 #[derive(Debug, Clone, PartialEq)]
 pub struct User {
     /// Username
@@ -2609,6 +2613,7 @@ pub struct User {
     pub expire: libc::time_t
 }
 
+#[cfg(not(target_os = "redox"))] // RedoxFS does not support passwd
 impl From<&libc::passwd> for User {
     fn from(pw: &libc::passwd) -> User {
         unsafe {
@@ -2632,6 +2637,7 @@ impl From<&libc::passwd> for User {
     }
 }
 
+#[cfg(not(target_os = "redox"))] // RedoxFS does not support passwd
 impl User {
     fn from_anything<F>(f: F) -> Result<Option<Self>>
     where
@@ -2709,6 +2715,7 @@ impl User {
 }
 
 /// Representation of a Group, based on `libc::group`
+#[cfg(not(target_os = "redox"))] // RedoxFS does not support passwd
 #[derive(Debug, Clone, PartialEq)]
 pub struct Group {
     /// Group name
@@ -2719,6 +2726,7 @@ pub struct Group {
     pub mem: Vec<String>
 }
 
+#[cfg(not(target_os = "redox"))] // RedoxFS does not support passwd
 impl From<&libc::group> for Group {
     fn from(gr: &libc::group) -> Group {
         unsafe {
@@ -2731,6 +2739,7 @@ impl From<&libc::group> for Group {
     }
 }
 
+#[cfg(not(target_os = "redox"))] // RedoxFS does not support passwd
 impl Group {
     unsafe fn members(mem: *mut *mut c_char) -> Vec<String> {
         let mut ret = Vec::new();

test/test.rs

@@ -33,7 +33,7 @@ cfg_if! {
                 }
             }
         }
-    } else {
+    } else if #[cfg(not(target_os = "redox"))] {
         macro_rules! require_capability {
             ($capname:ident) => {}
         }
@@ -95,7 +95,7 @@ cfg_if! {
                 }
             }
         }
-    } else {
+    } else if #[cfg(not(target_os = "redox"))] {
         macro_rules! skip_if_seccomp {
             ($name:expr) => {}
         }

test/test_unistd.rs

@@ -108,7 +108,9 @@ fn test_mkfifo_directory() {
 }
 
 #[test]
-#[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "android")))]
+#[cfg(not(any(
+    target_os = "macos", target_os = "ios",
+    target_os = "android", target_os = "redox")))]
 fn test_mkfifoat_none() {
     let _m = ::CWD_LOCK.read().expect("Mutex got poisoned by another test");
 
@@ -123,7 +125,9 @@ fn test_mkfifoat_none() {
 }
 
 #[test]
-#[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "android")))]
+#[cfg(not(any(
+    target_os = "macos", target_os = "ios",
+    target_os = "android", target_os = "redox")))]
 fn test_mkfifoat() {
     let tempdir = tempfile::tempdir().unwrap();
     let dirfd = open(tempdir.path(), OFlag::empty(), Mode::empty()).unwrap();
@@ -137,7 +141,9 @@ fn test_mkfifoat() {
 }
 
 #[test]
-#[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "android")))]
+#[cfg(not(any(
+    target_os = "macos", target_os = "ios",
+    target_os = "android", target_os = "redox")))]
 fn test_mkfifoat_directory_none() {
     let _m = ::CWD_LOCK.read().expect("Mutex got poisoned by another test");
 
@@ -146,7 +152,9 @@ fn test_mkfifoat_directory_none() {
 }
 
 #[test]
-#[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "android")))]
+#[cfg(not(any(
+    target_os = "macos", target_os = "ios",
+    target_os = "android", target_os = "redox")))]
 fn test_mkfifoat_directory() {
     // mkfifoat should fail if a directory is given
     let tempdir = tempfile::tempdir().unwrap();
@@ -680,6 +688,7 @@ fn test_symlinkat() {
 }
 
 #[test]
+#[cfg(not(target_os = "redox"))]
 fn test_linkat_file() {
     let tempdir = tempfile::tempdir().unwrap();
     let oldfilename = "foo.txt";
@@ -700,6 +709,7 @@ fn test_linkat_file() {
 }
 
 #[test]
+#[cfg(not(target_os = "redox"))]
 fn test_linkat_olddirfd_none() {
     let _dr = ::DirRestore::new();
 
@@ -724,6 +734,7 @@ fn test_linkat_olddirfd_none() {
 }
 
 #[test]
+#[cfg(not(target_os = "redox"))]
 fn test_linkat_newdirfd_none() {
     let _dr = ::DirRestore::new();
 
@@ -748,7 +759,7 @@ fn test_linkat_newdirfd_none() {
 }
 
 #[test]
-#[cfg(not(any(target_os = "ios", target_os = "macos")))]
+#[cfg(not(any(target_os = "ios", target_os = "macos", target_os = "redox")))]
 fn test_linkat_no_follow_symlink() {
     let _m = ::CWD_LOCK.read().expect("Mutex got poisoned by another test");
 
@@ -785,6 +796,7 @@ fn test_linkat_no_follow_symlink() {
 }
 
 #[test]
+#[cfg(not(target_os = "redox"))]
 fn test_linkat_follow_symlink() {
     let _m = ::CWD_LOCK.read().expect("Mutex got poisoned by another test");