At Thu, 3 Apr 2003 03:42:11 +0200,
Robert Millan wrote:
> the following code seems to be compliant with the Glibc documentation
> referred to sockaddr_un, as it provides a char* as the second component
> of the struct:
>
> #include <sys/socket.h>
> #include <sys/un.h>
> main ()
> {
> sockaddr_un test = { AF_LOCAL, "" };
> }
>
> however, when built with g++ (and not with gcc) on GNU/Hurd, it reports
> mismatch errors:
>
> test.c: In function `int main()':
> test.c:6: invalid conversion from `const char*' to `unsigned char'
d
>
> which is strange that it expects a char when both the documentation
> and <sys/un.h> agree that it should be a char*.
>
> the code in question compiles fine on GNU/Linux.
SUSv3 describes sockaddr_un has at least sun_family and sun_path. The
definition of 4.4BSD adds sun_len. Hurd uses the generic definition,
and other use the 4.4BSD's. Historically, BSD (4.2?) does not have
sun_len member in struct sockaddr_un. Nowadays BSD (after 4.3?) has
sockaddr_un.sun_len.
sockaddr_un can be variable length, so I think your program style
should be avoided. I think it's appropriate to use the substitution
like test.sun_family=AF_LOCAL, or so.
I don't think it's bug. I would like to close your report, ok?
Regards,
-- gotom
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