Hi,
On Sun, Oct 26, 2025 at 12:23:51PM +0100, Hiltjo Posthuma wrote:
> At a glance, maybe this:
>
> if (!sflag && !set2ranges && !set2check)
> eprintf("cannot map to an empty set.\n");
>
> should be:
>
> if (!dflag && !set2ranges && !set2check)
> eprintf("cannot map to an empty set.\n");
I think you are right, but after reading the POSIX spec seems like
it is a bit more complex. Quoting from the standard:
When the -d option is specified:
Input characters found in the array specified by string1
shall be deleted.
When the -C option is specified with -d, all characters
except those specified by string1 shall be deleted. The
contents of string2 are ignored, unless the -s option is
also specified.
When the -c option is specified with -d, all values except
those specified by string1 shall be deleted. The contents
of string2 shall be ignored, unless the -s option is also
specified.
The same string cannot be used for both the -d and the -s
option; when both options are specified, both string1 (used
for deletion) and string2 (used for squeezing) shall be
required.
So, I suppose the condition has to be something like:
if ((!dflag || !Cflag && !cflag && !sflag) && !set2ranges && !set2check)
am I right?
Regards,
