Tiny Logtail is a command-line program, simply printing each line in a log file that has not been read yet.
$ cd tiny-logtail
$ make
$ chmod +x tiny-logtail
$ tiny-logtail <log_file> <offset_file>
$ cat > abc.txt
a
b
c
^D
$ tiny-logtail abc.txt
a
b
c
$ echo d >> abc.txt
$ tiny-logtail abc.txt
d