Add support for static binary for Linux. (#7)

src/main.rs

@@ -108,7 +108,7 @@ fn main() -> Result<()> {
     // On Linux, set the Pdeathsig so the child receives SIGTERM if the parent dies
     #[cfg(target_os = "linux")]
     {
-        use std::io::Error;
+        use std::io::{Error, ErrorKind};
         use std::os::unix::process::CommandExt;
 
         unsafe {
@@ -123,43 +123,19 @@ fn main() -> Result<()> {
                     return Err(Error::last_os_error());
                 }
 
-                Ok(())
-            });
-        }
-    }
-
-    // On FreeBSD, set the Pdeathsig so the child receives SIGTERM if the parent dies
-    #[cfg(target_os = "freebsd")]
-    {
-        use std::io::Error;
-        use std::os::unix::process::CommandExt;
-
-        unsafe {
-            cmd.pre_exec(|| {
-                if libc::procctl(libc::P_PID, 0, libc::PROC_PDEATHSIG, libc::SIGTERM) != 0 {
-                    return Err(Error::last_os_error());
-                }
-
-                if libc::procctl(libc::P_PID, 0, libc::PROC_PDEATHSIG, libc::SIGKILL) != 0 {
-                    return Err(Error::last_os_error());
+                // Double-check parent PID
+                let ppid = libc::getppid();
+                if ppid == 1 {
+                    // The parent is init, meaning we won't get PDEATHSIG if the original parent is gone
+                    return Err(Error::new(
+                        ErrorKind::Other,
+                        "Unable to operate on a program whose parent is init",
+                    ));
                 }
 
                 Ok(())
             });
         }
-    };
-
-    // Check if the parent is init, which means we won't get PDEATHSIG
-    #[cfg(any(target_os = "linux", target_os = "freebsd"))]
-    {
-        unsafe {
-            // Double-check parent PID
-            let ppid = libc::getppid();
-            if ppid == 1 {
-                // The parent is init, meaning we won't get PDEATHSIG if the original parent is gone
-                anyhow::bail!("Unable to operate on a program whose parent is init");
-            }
-        }
     }
 
     // Grab the exit code from the executed program