Re: SO_PASSCRED and SCM_CREDENTIALS | error: use of undeclared identifier

Did you get binaries? If so, install manually.

Best regards,
Jussi Korkala

> On 20. Mar 2024, at 22.16, Michael Grimm <trashcan@ellael.org> wrote:
> 
> Hi
> 
> Disclaimer:
> 
> I am trying to create a new port (knot-resolver-current) developed under Linux upstream. A so-called manager functionality is brand new in comparison to the previous knot-resolver. The corresponding git repository is leading edge development.
> 
> My main motivation is: learning how to create ports ;-)
> 
> 
> Compilation fails:
> 
> cc -pthread -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -O2 -pipe -fstack-protector-strong -fno-strict-aliasing -fPIC -I/usr/local/include/python3.9 -c knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c -o build/temp.freebsd-14.0-STABLE-amd64-cpython-39/knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.o
> knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c:52:42: error: use of undeclared identifier 'SO_PASSCRED'
>   52 |         res = setsockopt(controlfd, SOL_SOCKET, SO_PASSCRED, &data,
>      |                                                 ^
> knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c:97:23: error: invalid application of 'sizeof' to an incomplete type 'struct ucred'
>   97 |         char cmsg[CMSG_SPACE(sizeof(struct ucred))];
>      |                              ^     ~~~~~~~~~~~~~~
> /usr/include/sys/socket.h:577:65: note: expanded from macro 'CMSG_SPACE'
>  577 | #define CMSG_SPACE(l)           (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
>      |                                                                          ^
> /usr/include/x86/_align.h:51:35: note: expanded from macro '_ALIGN'
>   51 | #define _ALIGN(p)       (((__uintptr_t)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
>      |                                         ^
> knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c:97:37: note: forward declaration of 'struct ucred'
>   97 |         char cmsg[CMSG_SPACE(sizeof(struct ucred))];
>      |                                            ^
> knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c:116:27: error: use of undeclared identifier 'SCM_CREDENTIALS'
>  116 |                 if (cmsgp->cmsg_type == SCM_CREDENTIALS) {
>      |                                         ^
> knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c:118:36: error: invalid application of 'sizeof' to an incomplete type 'struct ucred'
>  118 |                         cmsgp->cmsg_len != CMSG_LEN(sizeof(struct ucred)) ||
>      |                                                     ^     ~~~~~~~~~~~~~~
> /usr/include/sys/socket.h:578:57: note: expanded from macro 'CMSG_LEN'
>  578 | #define CMSG_LEN(l)             (_ALIGN(sizeof(struct cmsghdr)) + (l))
>      |                                                                    ^
> knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c:97:37: note: forward declaration of 'struct ucred'
>   97 |         char cmsg[CMSG_SPACE(sizeof(struct ucred))];
>      |                                            ^
> knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c:125:17: error: variable has incomplete type 'struct ucred'
>  125 |                         struct ucred cred;
>      |                                      ^
> knot_resolver_manager/kresd_controller/supervisord/plugin/notifymodule.c:97:37: note: forward declaration of 'struct ucred'
>   97 |         char cmsg[CMSG_SPACE(sizeof(struct ucred))];
>      |                                            ^
> 5 errors generated.
> error: command '/usr/bin/cc' failed with exit code 1
> FAILED: install script '/bin/bash /wrkdirs/usr/ports/dns/knot-resolver-current/work/knot-resolver-v6.0.6/manager/scripts/install.sh /usr/local/bin/python3' failed with exit code 1.
> 
> 
> Both SO_PASSCRED and SCM_CREDENTIALS aren't defined in the complete git repository.
> 
> 
> Is there a way to include Linux compatibility regarding sockets?
> 
> 
> Thanks and regards,
> Michael
> 
>