https://bugs.kde.org/show_bug.cgi?id=404022

            Bug ID: 404022
           Summary: query output of `manpath` command if possible
           Product: kio-extras
           Version: 18.08.0
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: default
          Assignee: plasma-b...@kde.org
          Reporter: timor...@googlemail.com
  Target Milestone: ---

SUMMARY

It would be nice to also parse the output of the `manpath` command instead of
the $MANPATH environment variable, if the manpath command is available (it is
installed with man-db, so it should virtually always be available ?).

This may even make parsing `/etc/manpath.config` by hand unnecessary, as well
as looking into the $MANPATH environment variable, since the `manpath` command
covers both these cases.

Note that this is not a duplicate of #22446.

The motivation for this case is that under NixOS, the manpath.conf is in a
non-standard location, but `manpath` gives reliable output.

Although I don't fully understand how manpaths and catpaths work, the output of
`manpath -c` might be useful instead of constructing something by hand based on
`/etc/manpath.conf`, but that is just a hunch.

STEPS TO REPRODUCE
1. Install KDE on nixos
2. install kio-extras with man protocol support

OBSERVED RESULT
Open Help center, notice empty man pages section

EXPECTED RESULT
find all man pages in the man pages section

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS 18.09
(available in About System)
KDE Plasma Version: 5.13.4
KDE Frameworks Version: 5.49.0
Qt Version: 5.11.1

ADDITIONAL INFORMATION

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