forcing true to return false [was: Wishing rmdir had a prompt]

[Bernhard Voelker]

On 2019-10-23 19:22, address@hidden wrote:
> On 2019-09-02 17:22, Bernhard Voelker wrote:
>>  Just recently I've been asked (off-list) why src/true.c needs to have  
>>  80+ lines while 3 lines would be enough.
> 
> This piqued my curiosity.  Obvious comment header, localization, and  
> --{help,version} fluff aside, I was not aware of the GNU-specific fringe  
> case, outlined on the info page as steps to force true to produce a false  
> return value.  It has been added to my list of party gags.

You probably mean this case?

  $ env true --version >/dev/full ; echo $?
  true: write error: No space left on device
  1

Well, that's for programming safety and - after all - consistency among
the GNU tools.

Have a nice day,
Berny