U - tailgood first issuereported-canonical
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Description
Component
tail
Description
When using --follow=name, uutils tail accepts a file that has been replaced with a symlink and continues tailing the symlink target. GNU tail refuses to follow a path that becomes a symlink, printing "has been replaced with an untailable symbolic link".
Test / Reproduction Steps
cd /tmp && rm -rf tail_test && mkdir tail_test && cd tail_test
echo "original" > testfile
# GNU tail
timeout 2 tail --follow=name testfile &
sleep 0.3
rm testfile && ln -s /etc/passwd testfile
sleep 0.3
# Output: "has been replaced with an untailable symbolic link"
# uutils tail
rm -f testfile && echo "original" > testfile
timeout 2 tail --follow=name testfile &
sleep 0.3
rm testfile && ln -s /etc/passwd testfile
sleep 0.3
# Output: "'testfile' has appeared; following new file" + contents of /etc/passwd