Switch all builds from Travis to Cirrus

Travis has been super-slow lately (> 6 hours per build).  Cirrus is much
faster: about 20 minutes.  Cirrus also has slightly better test
coverage, mainly because it doesn't use SECCOMP.

Also,

* Fix the Redox CI build.  The old Travis configuration didn't actually
  build for Redox, so we never noticed that Redox can't be built with a
  stable compiler.  Thanks to @coolreader18 for finding this.

* Disable the udp_offload tests on cross-tested platforms.  These tests
  are failing with ENOPROTOOPT in Cirrus-CI.  I suspect it's due to a
  lack of support in QEMU.  These tests were skipped on Travis because
  its kernel was too old.

* Fix require_kernel_version on Cirrus-CI.  Cirrus reports the Linux
  kernel version as 4.19.112+, which the semver crate can't handle.

* Fix test_setfsuid on Cirrus.  When run on Cirrus, it seems like the
  file in /tmp gets deleted as soon as it's closed.  Probably an
  overzealous temporary file cleaner.  Use /var/tmp, because no
  temporary file cleaner should run in there.

* Skip mount tests on Cirrus.  They fail for an unknown reason.
Issue #1351

* Skip the AF_ALG tests on Cirrus-CI
Issue #1352

1 files changed, 127 insertions, 0 deletions

diff --git a/test/common/mod.rs b/test/common/mod.rs
new file mode 100644
index 00000000..ace03fc6
--- /dev/null
+++ b/test/common/mod.rs
@@ -0,0 +1,127 @@
+use cfg_if::cfg_if;
+
+#[macro_export] macro_rules! skip {
+    ($($reason: expr),+) => {
+        use ::std::io::{self, Write};
+
+        let stderr = io::stderr();
+        let mut handle = stderr.lock();
+        writeln!(handle, $($reason),+).unwrap();
+        return;
+    }
+}
+
+cfg_if! {
+    if #[cfg(any(target_os = "android", target_os = "linux"))] {
+        #[macro_export] macro_rules! require_capability {
+            ($capname:ident) => {
+                use ::caps::{Capability, CapSet, has_cap};
+
+                if !has_cap(None, CapSet::Effective, Capability::$capname)
+                    .unwrap()
+                {
+                    skip!("Insufficient capabilities. Skipping test.");
+                }
+            }
+        }
+    } else if #[cfg(not(target_os = "redox"))] {
+        #[macro_export] macro_rules! require_capability {
+            ($capname:ident) => {}
+        }
+    }
+}
+
+#[cfg(any(target_os = "linux", target_os= "android"))]
+#[macro_export] macro_rules! skip_if_cirrus {
+    ($reason:expr) => {
+        if std::env::var_os("CIRRUS_CI").is_some() {
+            skip!("{}", $reason);
+        }
+    }
+}
+
+#[cfg(target_os = "freebsd")]
+#[macro_export] macro_rules! skip_if_jailed {
+    ($name:expr) => {
+        use ::sysctl::CtlValue;
+
+        if let CtlValue::Int(1) = ::sysctl::value("security.jail.jailed")
+            .unwrap()
+        {
+            skip!("{} cannot run in a jail. Skipping test.", $name);
+        }
+    }
+}
+
+#[cfg(not(target_os = "redox"))]
+#[macro_export] macro_rules! skip_if_not_root {
+    ($name:expr) => {
+        use nix::unistd::Uid;
+
+        if !Uid::current().is_root() {
+            skip!("{} requires root privileges. Skipping test.", $name);
+        }
+    };
+}
+
+cfg_if! {
+    if #[cfg(any(target_os = "android", target_os = "linux"))] {
+        #[macro_export] macro_rules! skip_if_seccomp {
+            ($name:expr) => {
+                if let Ok(s) = std::fs::read_to_string("/proc/self/status") {
+                    for l in s.lines() {
+                        let mut fields = l.split_whitespace();
+                        if fields.next() == Some("Seccomp:") &&
+                            fields.next() != Some("0")
+                        {
+                            skip!("{} cannot be run in Seccomp mode.  Skipping test.",
+                                stringify!($name));
+                        }
+                    }
+                }
+            }
+        }
+    } else if #[cfg(not(target_os = "redox"))] {
+        #[macro_export] macro_rules! skip_if_seccomp {
+            ($name:expr) => {}
+        }
+    }
+}
+
+cfg_if! {
+    if #[cfg(target_os = "linux")] {
+        #[macro_export] macro_rules! require_kernel_version {
+            ($name:expr, $version_requirement:expr) => {
+                use semver::{Version, VersionReq};
+
+                let version_requirement = VersionReq::parse($version_requirement)
+                        .expect("Bad match_version provided");
+
+                let uname = nix::sys::utsname::uname();
+                println!("{}", uname.sysname());
+                println!("{}", uname.nodename());
+                println!("{}", uname.release());
+                println!("{}", uname.version());
+                println!("{}", uname.machine());
+
+                // Fix stuff that the semver parser can't handle
+                let fixed_release = &uname.release().to_string()
+                    // Fedora 33 reports version as 4.18.el8_2.x86_64 or
+                    // 5.18.200-fc33.x86_64.  Remove the underscore.
+                    .replace("_", "-")
+                    // Cirrus-CI reports version as 4.19.112+ .  Remove the +
+                    .replace("+", "");
+                let mut version = Version::parse(fixed_release).unwrap();
+
+                //Keep only numeric parts
+                version.pre.clear();
+                version.build.clear();
+
+                if !version_requirement.matches(&version) {
+                    skip!("Skip {} because kernel version `{}` doesn't match the requirement `{}`",
+                        stringify!($name), version, version_requirement);
+                }
+            }
+        }
+    }
+}