From 4a832d32f232a68acdabfd29e526d2a4b6366a1c Mon Sep 17 00:00:00 2001 From: Dominik Stolz Date: Sat, 10 Jul 2021 12:58:30 +0200 Subject: [PATCH] Check whether clone3 syscall exists in pidfd test --- src/test/ui/command/command-create-pidfd.rs | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/src/test/ui/command/command-create-pidfd.rs b/src/test/ui/command/command-create-pidfd.rs index db728be09df..93321ac536a 100644 --- a/src/test/ui/command/command-create-pidfd.rs +++ b/src/test/ui/command/command-create-pidfd.rs @@ -2,10 +2,28 @@ // only-linux - pidfds are a linux-specific concept #![feature(linux_pidfd)] -use std::os::linux::process::{CommandExt, ChildExt}; +#![feature(rustc_private)] + +extern crate libc; + +use std::io::Error; +use std::os::linux::process::{ChildExt, CommandExt}; use std::process::Command; +fn has_clone3() -> bool { + let res = unsafe { libc::syscall(libc::SYS_clone3, 0, 0) }; + let err = (res == -1) + .then(|| Error::last_os_error()) + .expect("probe syscall should not succeed"); + err.raw_os_error() != Some(libc::ENOSYS) +} + fn main() { + // pidfds require the clone3 syscall + if !has_clone3() { + return; + } + // We don't assert the precise value, since the standard library // might have opened other file descriptors before our code runs. let _ = Command::new("echo")