On 23.03.22 23:54, Thomas Munro wrote:
That's because ForkNum is a signed type. You will probably succeed if
you use "%d" instead.
Erm, is that really OK? C says "Each enumerated type shall be
compatible with char, a signed integer type, or an
unsigned integer type. The choice of type is implementation-defined,
but shall be capable of representing the values of all the members of
the enumeration." It could even legally vary from enum to enum,
though in practice most compilers probably just use ints all the time
unless you use weird pragma pack incantation. Therefore I think you
need an intermediate variable with the size and signedness matching the
format string, if you're going to scanf directly into it, which
David's V6 did.
An intermediate variable is probably the best way to avoid thinking
about this much more. ;-) But note that the committed patch uses a %u
format whereas the ForkNum enum is signed.
Btw., why the sscanf() instead of just strtol/stroul?
