1 /*-------------------------------------------------------------------------
4 * get peer userid for UNIX-domain socket connection
6 * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
10 * src/port/getpeereid.c
12 *-------------------------------------------------------------------------
17 #include <sys/param.h>
18 #include <sys/socket.h>
26 #ifdef HAVE_SYS_UCRED_H
27 #include <sys/ucred.h>
32 * BSD-style getpeereid() for platforms that lack it.
35 getpeereid(int sock, uid_t *uid, gid_t *gid)
37 #if defined(SO_PEERCRED)
38 /* Linux: use getsockopt(SO_PEERCRED) */
39 struct ucred peercred;
40 ACCEPT_TYPE_ARG3 so_len = sizeof(peercred);
42 if (getsockopt(sock, SOL_SOCKET, SO_PEERCRED, &peercred, &so_len) != 0 ||
43 so_len != sizeof(peercred))
48 #elif defined(LOCAL_PEERCRED)
49 /* Debian with FreeBSD kernel: use getsockopt(LOCAL_PEERCRED) */
50 struct xucred peercred;
51 ACCEPT_TYPE_ARG3 so_len = sizeof(peercred);
53 if (getsockopt(sock, 0, LOCAL_PEERCRED, &peercred, &so_len) != 0 ||
54 so_len != sizeof(peercred) ||
55 peercred.cr_version != XUCRED_VERSION)
57 *uid = peercred.cr_uid;
58 *gid = peercred.cr_gid;
60 #elif defined(HAVE_GETPEERUCRED)
61 /* Solaris: use getpeerucred() */
64 ucred = NULL; /* must be initialized to NULL */
65 if (getpeerucred(sock, &ucred) == -1)
68 *uid = ucred_geteuid(ucred);
69 *gid = ucred_getegid(ucred);
72 if (*uid == (uid_t) (-1) || *gid == (gid_t) (-1))
76 /* No implementation available on this platform */