Public bug reported:

Command-line: libreoffice --convert-to odt:writer8 myfile.txt

The returned status code ($?) is zero.  So far, so good.  But, when I
try to access the ODT file (E.g. copy it), it doesn't yet exist.

Adding `sync; sync; sync` right after the libreoffice batch execution did not 
help.
Adding --headless as an option did not help.

If I sleep for a few seconds immediately after the libreoffice batch
execution, then the file finally gets completed before a subsequent
command references the ODT file.

Sample script:

### Create somehow a file called myfile.txt
rm myfile.odt somewhere-else.odt
libreoffice --headless --convert-to odt:writer8 myfile.txt
RC=$?
if [ $RC -ne 0 ]; then 
        echo '*** libreoffice conversion failed for myfile.txt'
        exit 86
fi
#sleep 3
ls *.odt

Result: ls: cannot access '*.odt': No such file or directory

If one changes the above script so that the sleep is executed, then the
ODT file is available.

Observation: It appears that executing libreoffice in batch mode is
somehow kicking off a separate process to finish the ODT file.  The exit
to the shell and the availability of the ODT file should be
synchronized.

Before 18.04, I never saw this behavior.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: libreoffice 1:6.0.3-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Jun 16 17:07:02 2018
InstallationDate: Installed on 2017-10-13 (246 days ago)
InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926)
SourcePackage: libreoffice
UpgradeStatus: Upgraded to bionic on 2018-05-18 (29 days ago)

** Affects: libreoffice (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1777285

Title:
  Batch libreoffice --convert-to offers no way to wait for document
  completion

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