Hi, attached is a test program for SCM_CREDS support for GNU/Linux, GNU/kFreeBSD and GNU/Hurd. With the soon to be submitted patches Hurd works as given below. LD_PRELOAD is used for the Hurd tests. Options: none: send an integer as data -z: send a zero credentials byte as data (used by dbus) -n: don't create explicit credentials structure -nz, -zn: combine the two options above 1) Sent credentials are correct: ./scm_cred_recv & ./scm_cred_send Linux: OK, only sent ids kFreeBSD: OK, sent ids + groups Hurd: OK, only sent ids ./scm_cred_recv -z& ./scm_cred_send -z Linux: OK, same as above kFreeBSD: OK, same as above Hurd: OK, sent IDs + groups ./scm_cred_recv & ./scm_cred_send -n Linux: OK, same as above kFreeBSD: nOK; ERROR: bad cmsg header cmhp == NULL, data: OK Hurd: same as kFreeBSD ./scm_cred_recv -z& ./scm_cred_send -nz Linux: OK, same as above kFreeBSD: nOK; ERROR: bad cmsg header cmhp == NULL, data: OK Hurd: OK, sent IDs + groups 2) When wrong credentials are sent the behaviour is different: Linux: no flag: ERROR [EPERM Operation not permitted] sendmsg -z: ERROR [EPERM Operation not permitted] sendmsg -n: sent credentials are not honoured, received ones are created -zn: sent credentials are not honoured, received ones are created kFreeBSD: no flag: sent credentials are not honoured, received ones are created -n: ERROR: bad cmsg header cmhp == NULL -z: sent credentials are not honoured, received ones are created -zn: ERROR: bad cmsg header cmhp == NULL Hurd: no flag: ERROR [EPERM Operation not permitted] sendmsg -z: sent credentials are not honoured, received ones are created -n: ERROR: bad cmsg header cmhp == NULL -zn: sent credentials are not honoured, received ones are created Is the implemented behaviour OK, anything to add/change/remove?
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