From 1c02eebc71a0ede4e75fea516920697850bbe030 Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Tue, 4 Jan 2022 03:51:32 -0600
Subject: Implement unmount

---
 src/util.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/util.rs')

diff --git a/src/util.rs b/src/util.rs
index c21442f..5da19c8 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -29,6 +29,12 @@ pub struct OutputChain<'a> {
 
 pub struct OutputChainIter<'a>(Option<&'a OutputChain<'a>>);
 
+impl DumbFd {
+    pub fn take(&mut self) -> DumbFd {
+        DumbFd(std::mem::replace(&mut self.0, -1))
+    }
+}
+
 impl IntoRawFd for DumbFd {
     fn into_raw_fd(self) -> RawFd {
         let fd = self.0;
@@ -39,7 +45,9 @@ impl IntoRawFd for DumbFd {
 
 impl Drop for DumbFd {
     fn drop(&mut self) {
-        let _ = close(self.0);
+        if !self.0.is_negative() {
+            let _ = close(self.0);
+        }
     }
 }
 
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