arb cannot handle databases with spaces in path/name

[westram]

arb has multiple problems with spaces in database names:

• saving a database with that name from GUI works fine, as long as no compression is enabled.
  With compression enabled arb crashes with fixed by [18821]

  xz: saved: No such file or directory
  xz: from: No such file or directory
  xz: GUI.arb~: No such file or directory
  [arb_launcher[0]: 'arb_ntree' has terminated with error 141]
  

  • All data is lost in that case~~
  • Tested with gzip + xz and DEBUG + RELEASE.
  • also occurs if directory saved to contains spaces

• loading a compressed database named test compressed space.arb from GUI results in the following console output

  xz: compressed: No such file or directory
  xz: space.arb: No such file or directory
  

  and GUI pops up an error

  ARB ERROR: '/path/test compressed space.arb' is no valid arb database file
  

• AUTO DETECTing format in importer reports

  Error reading format:
  While loading import filter 'unknown.ift': No such file or directory
  

  when a file with spaces in name is selected.
• running

  arb 'test saved from GUI.arb'
  

  results in

  arb_ntree: Error: too many stray arguments given (max. 2 accepted)
  

---

related: #827, #665

[westram]

with [18819]:

• DEBUG and RELEASE builds terminate with

  [arb_launcher[0]: 'arb_ntree /home/ralf/data/test.arb' has terminated with error 141]
  

  I'm not sure where this comes from.
  In gdb a SIGPIPE is raised.
  error code 141 might come from compressor (e.g. xz).

with [18821]:

• both version properly report error

  11:56.10  While writing '/home/user/data/test compressed space.arb~': Broken pipe
            (close reports: pipe writing to
             file='/home/user/data/test compressed space.arb~'
             using cmd='xz > /home/user/data/test compressed space.arb~'
             failed with exitcode=1 (broken pipe? corrupted archive?)
            )