bug#20130: GNU test behaviour

[Pádraig Brady]

tag 20130 notabug
close 20130
stop

On 17/03/15 22:27, Paul Eggert wrote:
> On 03/17/2015 02:23 PM, Robson Júnior wrote:
>> `test -e` with no filename being passed to. It returns 0, although it 
>> should be 1. 
> 
> No, 'test -e' should exit with status 0, because '-e' is a nonempty 
> string.  In general, 'test X' exits with status 0 if and only if X is 
> nonempty.  POSIX requires this behavior; see:
> 
> http://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html
> 
> and search for "1 argument".

If the filename is in a shell variable,
this is another reason for quoting.
I.E. this will work reliably:

  file=blah
  test -e "$file" || echo missing

thanks,
Pádraig.