Avert a crash and file descriptor leak in yank-media

* java/org/gnu/emacs/EmacsNative.java (close): New declaration.

* java/org/gnu/emacs/EmacsSdk11Clipboard.java
(getClipboardData): Catch SecurityException and guarantee file
descriptors are closed even if exceptions arise.

* src/android.c (dup): Export another function.

2 files changed, 27 insertions, 0 deletions

diff --git a/java/org/gnu/emacs/EmacsNative.java b/java/org/gnu/emacs/EmacsNative.java
index 7d7e1e5d831..f15927bb3a7 100644
--- a/java/org/gnu/emacs/EmacsNative.java
+++ b/java/org/gnu/emacs/EmacsNative.java
@@ -39,6 +39,9 @@ public final class EmacsNative
   /* Like `dup' in C.  */
   public static native int dup (int fd);
 
+  /* Like `close' in C.  */
+  public static native int close (int fd);
+
   /* Obtain the fingerprint of this build of Emacs.  The fingerprint
      can be used to determine the dump file name.  */
   public static native String getFingerprint ();
diff --git a/java/org/gnu/emacs/EmacsSdk11Clipboard.java b/java/org/gnu/emacs/EmacsSdk11Clipboard.java
index b8a43496b6d..b068a89831e 100644
--- a/java/org/gnu/emacs/EmacsSdk11Clipboard.java
+++ b/java/org/gnu/emacs/EmacsSdk11Clipboard.java
@@ -245,6 +245,8 @@ public final class EmacsSdk11Clipboard extends EmacsClipboard
     if (data == null || data.getItemCount () < 1)
       return null;
 
+    fd = -1;
+
     try
       {
         uri = data.getItemAt (0).getUri ();
@@ -267,12 +269,34 @@ public final class EmacsSdk11Clipboard extends EmacsClipboard
         /* Close the original offset.  */
         assetFd.close ();
       }
+    catch (SecurityException e)
+      {
+        /* Guarantee a file descriptor duplicated or detached is
+           ultimately closed if an error arises.  */
+
+        if (fd != -1)
+          EmacsNative.close (fd);
+
+        return null;
+      }
     catch (FileNotFoundException e)
       {
+        /* Guarantee a file descriptor duplicated or detached is
+           ultimately closed if an error arises.  */
+
+        if (fd != -1)
+          EmacsNative.close (fd);
+
         return null;
       }
     catch (IOException e)
       {
+        /* Guarantee a file descriptor duplicated or detached is
+           ultimately closed if an error arises.  */
+
+        if (fd != -1)
+          EmacsNative.close (fd);
+
         return null;
       }