ffiselect: Set /proc/pid/oom_score_adj=900 for non-PoSt tasks (#329)

src/ffiselect/mod.rs

@@ -0,0 +1,18 @@
+use crate::utils::oom::set_oom_score_adj;
+
+pub fn spawn_task(task: Task) -> Result<Child, Error> {
+    let child = Command::new(task.program)
+        .args(&task.args)
+        // ... other command setup ...
+        .spawn()?;
+
+    // Set high OOM score for non-PoSt tasks
+    if !task.is_post_task() {
+        if let Err(e) = set_oom_score_adj(child.id() as i32, 900) {
+            log::warn!("Failed to set OOM score adjustment: {}", e);
+            // Continue execution even if setting OOM score fails
+        }
+    }
+
+    Ok(child)
+} 

src/utils/oom.rs

@@ -0,0 +1,8 @@
+use std::fs;
+use std::io;
+use std::path::Path;
+
+pub fn set_oom_score_adj(pid: i32, score: i16) -> io::Result<()> {
+    let path = format!("/proc/{}/oom_score_adj", pid);
+    fs::write(Path::new(&path), score.to_string())
+}