tests/ui/process/nofile-limit.rs

   1 // Check that statically linked binary executes successfully
   2 // with RLIMIT_NOFILE resource lowered to zero. Regression
   3 // test for issue #96621.
   4 //
   5 // run-pass
   6 // dont-check-compiler-stderr
   7 // only-linux
   8 // no-prefer-dynamic
   9 // compile-flags: -Ctarget-feature=+crt-static -Crpath=no -Crelocation-model=static
  10 #![feature(exit_status_error)]
  11 #![feature(rustc_private)]
  12 extern crate libc;
  13
  14 use std::os::unix::process::CommandExt;
  15 use std::process::Command;
  16
  17 fn main() {
  18     let mut args = std::env::args();
  19     let this = args.next().unwrap();
  20     match args.next().as_deref() {
  21         None => {
  22             let mut cmd = Command::new(this);
  23             cmd.arg("Ok!");
  24             unsafe {
  25                 cmd.pre_exec(|| {
  26                     let rlim = libc::rlimit {
  27                         rlim_cur: 0,
  28                         rlim_max: 0,
  29                     };
  30                     if libc::setrlimit(libc::RLIMIT_NOFILE, &rlim) == -1 {
  31                         Err(std::io::Error::last_os_error())
  32                     } else {
  33                         Ok(())
  34                     }
  35                 })
  36             };
  37             let output = cmd.output().unwrap();
  38             println!("{:?}", output);
  39             output.status.exit_ok().unwrap();
  40             assert!(output.stdout.starts_with(b"Ok!"));
  41         }
  42         Some(word) => {
  43             println!("{}", word);
  44         }
  45     }
  46 }