diff options
Diffstat (limited to 'src/interfaces/libpq/fe-auth.c')
| -rw-r--r-- | src/interfaces/libpq/fe-auth.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/src/interfaces/libpq/fe-auth.c b/src/interfaces/libpq/fe-auth.c index de2b6f72a74..7cfb6c8f9a5 100644 --- a/src/interfaces/libpq/fe-auth.c +++ b/src/interfaces/libpq/fe-auth.c @@ -343,11 +343,12 @@ pg_local_sendauth(char *PQerrormsg, PGconn *conn) struct msghdr msg; #ifdef HAVE_STRUCT_CMSGCRED - /* Prevent padding */ - char cmsgmem[sizeof(struct cmsghdr) + sizeof(struct cmsgcred)]; - - /* Point to start of first structure */ - struct cmsghdr *cmsg = (struct cmsghdr *) cmsgmem; + struct cmsghdr *cmsg; + union + { + struct cmsghdr hdr; + unsigned char buf[CMSG_SPACE(sizeof(struct cmsgcred))]; + } cmsgbuf; #endif /* @@ -363,11 +364,12 @@ pg_local_sendauth(char *PQerrormsg, PGconn *conn) msg.msg_iovlen = 1; #ifdef HAVE_STRUCT_CMSGCRED - /* Create control header, FreeBSD */ - msg.msg_control = cmsg; - msg.msg_controllen = sizeof(cmsgmem); - memset(cmsg, 0, sizeof(cmsgmem)); - cmsg->cmsg_len = sizeof(cmsgmem); + /* FreeBSD needs us to set up a message that will be filled in by kernel */ + memset(&cmsgbuf, 0, sizeof(cmsgbuf)); + msg.msg_control = &cmsgbuf.buf; + msg.msg_controllen = sizeof(cmsgbuf.buf); + cmsg = CMSG_FIRSTHDR(&msg); + cmsg->cmsg_len = CMSG_LEN(sizeof(struct cmsgcred)); cmsg->cmsg_level = SOL_SOCKET; cmsg->cmsg_type = SCM_CREDS; #endif |