lddtree: don't crash when interp is missing

Easy way to reproduce is to copy a cross-compile ELF like:
$ ./lddtree.py --copy-to-tree $PWD/foo /usr/share/qemu/s390-ccw.img
lddtree.py: warning: /usr/share/qemu/s390-ccw.img: [Errno 2] No such file or directory: '/lib/ld64.so.1'

We have checks for missing libs already, but interps are full paths
and thus bypass the resolution logic.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/lddtree.py b/lddtree.py
index b65c3f2..e3dafda 100755
--- a/lddtree.py
+++ b/lddtree.py
@@ -589,8 +589,14 @@ def _ActionCopy(options, elf):
         os.makedirs(os.path.dirname(dst), exist_ok=True)
         try:
             shutil.copy2(realsrc, dst)
+        except FileNotFoundError as e:
+            warn(f'{elf["path"]}: {e}')
+            return
         except IOError:
-            os.unlink(dst)
+            try:
+                os.unlink(dst)
+            except FileNotFoundError:
+                pass
             shutil.copy2(realsrc, dst)
 
         if wrapit: