diff --git a/configure.ac b/configure.ac
index 90fe145bbfbecf2d69a90965fe6249a07708afa9..85db01f5e37f3d402eb88d6370e150a213ce5056 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,7 +93,7 @@ AC_MSG_RESULT([$have_cpuid])
 
 
 dnl Availability of various common functions (non-fatal if missing).
-AC_CHECK_FUNCS_ONCE([cfmakeraw regexec sched_getaffinity getuid getgid \
+AC_CHECK_FUNCS_ONCE([cfmakeraw regexec sched_getaffinity getuid getgid initgroups \
  posix_fallocate mmap])
 
 dnl Availability of various not common threadsafe functions
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 05c4af8ab7d2706ec3e1184f0b88087fc5f2ff40..a959ad92ed2ffc19a8662c84c814250fc0efda6a 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -859,6 +859,7 @@ virRun;
 virRunWithHook;
 virSetCloseExec;
 virSetNonBlock;
+virSetUIDGID;
 virSkipSpaces;
 virStrToDouble;
 virStrToLong_i;
diff --git a/src/util/util.c b/src/util/util.c
index 7d3377b5046f0ea8dbb571ebb839a7b404ae17c2..d6fa81b4af83005cc80406bf0caa53d5e908733b 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -2811,6 +2811,61 @@ int virGetGroupID(const char *name,
     return 0;
 }
 
+
+/* Set the real and effective uid and gid to the given values, and call
+ * initgroups so that the process has all the assumed group membership of
+ * that uid. return 0 on success, -1 on failure.
+ */
+int
+virSetUIDGID(uid_t uid, gid_t gid)
+{
+    if (gid > 0) {
+        if (setregid(gid, gid) < 0) {
+            virReportSystemError(errno,
+                                 _("cannot change to '%d' group"), gid);
+            return -1;
+        }
+    }
+
+    if (uid > 0) {
+# ifdef HAVE_INITGROUPS
+        struct passwd pwd, *pwd_result;
+        char *buf = NULL;
+        size_t bufsize;
+
+        bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
+        if (bufsize == -1)
+            bufsize = 16384;
+
+        if (VIR_ALLOC_N(buf, bufsize) < 0) {
+            virReportOOMError();
+            return -1;
+        }
+        getpwuid_r(uid, &pwd, buf, bufsize, &pwd_result);
+        if (!pwd_result) {
+            virReportSystemError(errno,
+                                 _("cannot getpwuid_r(%d)"), uid);
+            VIR_FREE(buf);
+            return -1;
+        }
+        if (initgroups(pwd.pw_name, pwd.pw_gid) < 0) {
+            virReportSystemError(errno,
+                                 _("cannot initgroups(\"%s\", %d)"),
+                                 pwd.pw_name, pwd.pw_gid);
+            VIR_FREE(buf);
+            return -1;
+        }
+        VIR_FREE(buf);
+# endif
+        if (setreuid(uid, uid) < 0) {
+            virReportSystemError(errno,
+                                 _("cannot change to uid to '%d'"), uid);
+            return -1;
+        }
+    }
+    return 0;
+}
+
 #else /* HAVE_GETPWUID_R */
 
 char *
@@ -2849,6 +2904,15 @@ int virGetGroupID(const char *name ATTRIBUTE_UNUSED,
 
     return 0;
 }
+
+int
+virSetUIDGID(uid_t uid ATTRIBUTE_UNUSED,
+             gid_t gid ATTRIBUTE_UNUSED)
+{
+    virUtilError(VIR_ERR_INTERNAL_ERROR,
+                 "%s", _("virSetUIDGID is not available"));
+    return -1;
+}
 #endif /* HAVE_GETPWUID_R */
 
 
diff --git a/src/util/util.h b/src/util/util.h
index ef4fc1349dfda0bc588491d403c67ade20c9369c..989962f33f5098bec77e18ac6fd7c1e6e3da5ac3 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -93,6 +93,8 @@ int virPipeReadUntilEOF(int outfd, int errfd,
                         char **outbuf, char **errbuf);
 int virFork(pid_t *pid);
 
+int virSetUIDGID(uid_t uid, gid_t gid);
+
 int virFileReadLimFD(int fd, int maxlen, char **buf) ATTRIBUTE_RETURN_CHECK;
 
 int virFileReadAll(const char *path, int maxlen, char **buf) ATTRIBUTE_RETURN_CHECK;