tmutil restore does not report an error if destination does not have enough space to restore files
Originator: | rsesek | ||
Number: | rdar://FB7746125 | Date Originated: | 2020-06-22 |
Status: | Open | Resolved: | |
Product: | macOS | Product Version: | 10.14.6 18G5033 |
Classification: | Incorrect/Unexpected Behavior | Reproducible: | Always |
If you attempt to restore files from the command line using `tmutil restore` and the destination does not have enough space for the files, tmutil exits uncleanly (status=1) but its text output indicates success. To verify: 1) Create a small temporary Disk Image: % hdiutil create -attach -fs HFS+ -volname tmrestore -size 5M /tmp/temp.dmg /dev/disk5 GUID_partition_scheme /dev/disk5s1 Apple_HFS /Volumes/tmrestore created: /tmp/temp.dmg 2) Restore a small file that will definitely fit into the destination: % tmutil restore -v -p /Volumes/Backup/Backups.backupdb/Elementary/Latest/iMac/Users/rsesek/Desktop/notes.txt /Volumes/tmrestore Copying file . ... 534 bytes for . Total copied: 0.00 MB (534 bytes) Items copied: 1 3) Verify the exit status: % echo $? 0 4) Verify the restore: % ls /Volumes/tmrestore transfer-notes.txt 5) Now try and restore a file whose size is larger than 5MB (the max size of the DMG): % tmutil restore -v -p /Volumes/Backup/Backups.backupdb/Elementary/Latest/iMac/Users/rsesek/Downloads/MKVToolNix-46.0.0.dmg /Volumes/tmrestore Copying file . ... Total copied: 38.27 MB (40132595 bytes) Items copied: 1 6) Verify the exit status: % echo $? 1 7) Verify the restore: % ls /Volumes/tmrestore transfer-notes.txt In step 5, tmutil does not report any error information and it indicates that it successfully copied 1 file. However, the exit status in step 6 shows that a failure occurred. And step 7 shows that the file was not restored, despite step 5 saying a copy was successful. tmutil restore should print an error message if it cannot restore a file, rather than incorrectly reporting that the restore completed successfully.
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