termux/proot-distro v5.6.0

Version 5.6.0

on GitHub

Many behavioral changes of proot-distro copy and sync.

Fixes that prevent data loss:

• sync --delete could delete files it had just written, delete the source directory itself, or wipe a whole destination tree when the source could not be read. It is now much more careful about what counts as a leftover, and refuses to delete anything at all if it cannot reliably list the source.
• copy --move across devices (for example moving a container folder to /sdcard) no longer deletes source files it was unable to copy.
• Copying or syncing a folder into a symlink that pointed back into the source no longer loops until it runs out of memory, leaving hundreds of stray directories behind.

Security:

• A container can no longer trick copy or sync into reading or writing files outside its own filesystem by planting symlinks or hard links. Every write now creates a new file rather than writing through a name that was already there.
• File names coming from inside a container are escaped before being printed, so a crafted name cannot mess with your terminal.

Transfers now finish instead of stopping halfway:

• A file that cannot be read or written is reported, skipped, and the transfer continues; the command exits with status 1 at the end. Previously a single locked file, a very long file name, or a symlink on a filesystem that does not support them (such as /sdcard) could abandon the rest of the transfer, sometimes without saying so.
• Very deep folder trees no longer crash with a Python traceback.

Files come out closer to the originals:

• Folder permissions and timestamps are now preserved, not stamped with the time of the transfer.
• A file whose permissions changed is updated without recopying it.
• Sparse files (such as /var/log/lastlog, which can look enormous) are copied as sparse files instead of expanding to their full size and filling up the device.
• --checksum now updates timestamps when the contents already match.

Behaviour matching cp / mv / rsync:

• copy -r onto an existing folder puts the source inside it and merges into it, so running the same copy twice updates instead of failing.
• Symlinks given as the source or destination are followed, on both the host and container side; symlinks inside the tree are still copied as symlinks. --move moves the link itself, as mv does.
• sync reports skipped device files, sockets and FIFOs instead of passing over them silently.
• sync --delete now requires a folder as the source (it silently did nothing with a single file).

Other:

• Host paths containing a colon are usable again, written as ./a:b.
• Progress bars no longer show counts like "(5/1)" or overflow.
• Help text explains what --checksum actually checks and that hard links become independent copies.