[Portland-bugs] [Bug 57921] New: Clarify the xdg-su man page

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=57921

          Priority: medium
            Bug ID: 57921
          Assignee: portland-bugs at lists.freedesktop.org
           Summary: Clarify the xdg-su man page
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: fgouget at codeweavers.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: xdg-utils
           Product: Portland

Created attachment 71040
  --> https://bugs.freedesktop.org/attachment.cgi?id=71040&action=edit
Better check the -u and -c options and document -c

The xdg-su man page says:

>  xdg-su [-u user] -c command
>
>  xdg-su provides a graphical dialog that prompts the user for a
>  password to run command as user or as root if no user was specified.

The '-c' option is not documented and this does not clearly say if one should
use 'xdg-su -c echo HelloWorld' or 'xdg-su -c "echo HelloWorld"'.

The example at the end of the page seems to imply the latter but then it's only
one example and one may think that a second example could show that the other
option is valid too.

>  xdg-su -u root -c "/opt/shinythings/bin/install-GUI --install fast"


I'll further note that the situation is muddied by the fact that

  xdg-su -c sh -c 'echo HelloWorld'

is equivalent to

  xdg-su -c foo -c 'echo HelloWorld'

and to

  xdg-su -c 'echo HelloWorld'

due to the limited parameter checking.


I'm attaching a patch as a starting point for a fix.

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