Sometimes you have a journal and a standard, not journaled, file you would like to use as a journaled file: you can use jf_join utility program to add your file to the list of journaled files managed by the journal. This is a usage example (the journal has been created at the previous paragraph):
tiian@linux:~/tutorial> ls -la > jf_tut_foo-data1
tiian@linux:~/tutorial> ls -la jf_tut_foo-*
-rw-r--r-- 1 tiian users 2038 2005-08-29 22:22 jf_tut_foo-data1
-rw-r--r-- 1 tiian users 8278 2005-08-29 22:12 jf_tut_foo-journal
tiian@linux:~/tutorial> jf_join -j jf_tut_foo-journal jf_tut_foo-data1
tiian@linux:~/tutorial> jf_report -j jf_tut_foo-journal
<?xml version="1.0" encoding="UTF-8"?>
<journal>
<header magic_number='0x41524153' version='1' file_id_mask='0x38'
file_id_mask_shift='3' size_mask='0xffffffc0' size_mask_shift='6'
file_size='4194304' file_num='3' rotation_threshold='0.800'
ctrl_recs='36' journal_recs='32980' />
<journaled_file_table max_files='8' number_of_files='2'
file_table='0x804b170'>
<file id='0' name='jf_tut_foo-journal' last_pos='32980' last_size='0'
status='0' last_uc_pos='0' last_uc_size='32980' stream='0x804b008' />
<file id='1' name='jf_tut_foo-data1' last_pos='0' last_size='791'
status='0' last_uc_pos='0' last_uc_size='0' stream='(nil)' />
</journaled_file_table>
<records>
</records>
</journal>
file jf_tut_foo-data1 has been joined to
journal jf_tut_foo-journal and can now be used
with libjf
API.