uucore: remove unused getpid and getsid functions

Author: xtqqczze

src/uucore/src/lib/features/process.rs

@@ -3,13 +3,11 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-// spell-checker:ignore (vars) cvar exitstatus cmdline kworker getsid getpid
+// spell-checker:ignore (vars) cvar exitstatus cmdline kworker
 // spell-checker:ignore (sys/unix) WIFSIGNALED ESRCH
 // spell-checker:ignore pgrep pwait snice getpgrp
 
 use libc::{gid_t, pid_t, uid_t};
-#[cfg(not(target_os = "redox"))]
-use nix::errno::Errno;
 use nix::sys::signal::{self as nix_signal, SigHandler, Signal};
 use nix::unistd::Pid;
 use std::io;
@@ -46,35 +44,6 @@ pub fn getuid() -> uid_t {
     nix::unistd::getuid().as_raw()
 }
 
-/// `getpid()` returns the pid of the calling process.
-pub fn getpid() -> pid_t {
-    nix::unistd::getpid().as_raw()
-}
-
-/// `getsid()` returns the session ID of the process with process ID pid.
-///
-/// If pid is 0, getsid() returns the session ID of the calling process.
-///
-/// # Error
-///
-/// - [Errno::EPERM] A process with process ID pid exists, but it is not in the same session as the calling process, and the implementation considers this an error.
-/// - [Errno::ESRCH] No process with process ID pid was found.
-///
-///
-/// # Platform
-///
-/// This function only support standard POSIX implementation platform,
-/// so some system such as redox doesn't supported.
-#[cfg(not(target_os = "redox"))]
-pub fn getsid(pid: i32) -> Result<pid_t, Errno> {
-    let pid = if pid == 0 {
-        None
-    } else {
-        Some(Pid::from_raw(pid))
-    };
-    nix::unistd::getsid(pid).map(Pid::as_raw)
-}
-
 /// Missing methods for Child objects
 pub trait ChildExt {
     /// Send a signal to a Child process.
@@ -166,25 +135,3 @@ impl ChildExt for Child {
         Ok(None)
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    #[cfg(not(target_os = "redox"))]
-    fn test_getsid() {
-        assert_eq!(
-            getsid(getpid()).expect("getsid(getpid)"),
-            // zero is a special value for SID.
-            // https://pubs.opengroup.org/onlinepubs/9699919799/functions/getsid.html
-            getsid(0).expect("getsid(0)")
-        );
-
-        // SID never be 0.
-        assert!(getsid(getpid()).expect("getsid(getpid)") > 0);
-
-        // This might caused tests failure but the probability is low.
-        assert!(getsid(999_999).is_err());
-    }
-}