filesystem.h surface error codes (#998)

- Improvement: File copy, scan, clone, and move operations now report the underlying OS error in failure messages

1 files changed, 11 insertions, 2 deletions

diff --git a/src/zen/cmds/dedup_cmd.cpp b/src/zen/cmds/dedup_cmd.cpp
index 9ef50a97d..18ad56aec 100644
--- a/src/zen/cmds/dedup_cmd.cpp
+++ b/src/zen/cmds/dedup_cmd.cpp
@@ -240,7 +240,12 @@ DedupCommand::Run(const ZenCliOptions& GlobalOptions, int argc, char** argv)
 			{
 				zen::BLAKE3Stream b3s;
 
-				zen::ScanFile(Entry.path(), 64 * 1024, [&](const void* Data, size_t Size) { b3s.Append(Data, Size); });
+				if (std::error_code ScanEc =
+						zen::ScanFile(Entry.path(), 64 * 1024, [&](const void* Data, size_t Size) { b3s.Append(Data, Size); });
+					ScanEc)
+				{
+					throw std::system_error(ScanEc, fmt::format("Failed to scan file '{}'", Entry.path()));
+				}
 
 				Hash = b3s.GetHash();
 			}
@@ -279,7 +284,11 @@ DedupCommand::Run(const ZenCliOptions& GlobalOptions, int argc, char** argv)
 				Options.EnableClone = true;
 				Options.MustClone	= true;
 
-				zen::CopyFile(Dupe->path(), Entry.path(), Options);
+				if (std::error_code Ec = zen::CopyFile(Dupe->path(), Entry.path(), Options); Ec)
+				{
+					ZEN_ERROR("Failed to clone '{}' to '{}': {}", Dupe->path(), Entry.path(), Ec.message());
+					continue;
+				}
 
 				DupeBytes += Entry.file_size();
 			}