[S-mailx] Syntax for "if -n"?

[Paul Vojta]

Dear all,

I believe that there's a bug in s-nail, both in Debian version 14.9.11-2
and in commit 00c264c02c1b411a6d553e610324a34cdbd7e778 on git
(dated 2022-07-07).

When I run s-nail with the following in my .mailrc file:

        set myvar=a
        if -n "$myvar"
          echo myvar is set
        endif

        echo done

I get the following output:

        s-nail: if: invalid expression syntax -- near: -n
        s-nail:    Expression: -n $myvar 
        s-nail:    Stopped at: -n $myvar 
        done
        s-nail version v14.9.24.  Type `?' for help

(On Debian it prints a different version number, of course.)

Is this a bug, or if not then what is the correct syntax?

Sincerely,


Paul Vojta