1 files changed, 65 insertions, 28 deletions

diff --git a/utils/gssd/gssd.c b/utils/gssd/gssd.c
index 9bf7917..2179e15 100644
--- a/utils/gssd/gssd.c
+++ b/utils/gssd/gssd.c
@@ -363,54 +363,91 @@ gssd_destroy_client(struct clnt_info *clp)
 
 static void gssd_scan(void);
 
-static inline void 
-wait_for_child_and_detach(pthread_t th)
+static int
+start_upcall_thread(void (*func)(struct clnt_upcall_info *), void *info)
 {
-	pthread_mutex_lock(&pmutex);
-	while (!thread_started)
-		pthread_cond_wait(&pcond, &pmutex);
-	thread_started = false;
-	pthread_mutex_unlock(&pmutex);
-	pthread_detach(th);
+	pthread_attr_t attr;
+	pthread_t th;
+	int ret;
+
+	ret = pthread_attr_init(&attr);
+	if (ret != 0) {
+		printerr(0, "ERROR: failed to init pthread attr: ret %d: %s\n",
+			 ret, strerror(errno));
+		return ret;
+	}
+	ret = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+	if (ret != 0) {
+		printerr(0, "ERROR: failed to create pthread attr: ret %d: "
+			 "%s\n", ret, strerror(errno));
+		return ret;
+	}
+
+	ret = pthread_create(&th, &attr, (void *)func, (void *)info);
+	if (ret != 0)
+		printerr(0, "ERROR: pthread_create failed: ret %d: %s\n",
+			 ret, strerror(errno));
+	return ret;
+}
+
+static struct clnt_upcall_info *alloc_upcall_info(struct clnt_info *clp)
+{
+	struct clnt_upcall_info *info;
+
+	info = malloc(sizeof(struct clnt_upcall_info));
+	if (info == NULL)
+		return NULL;
+	info->clp = clp;
+
+	return info;
 }
 
-/* For each upcall create a thread, detach from the main process so that
- * resources are released back into the system without the need for a join.
- * We need to wait for the child thread to start and consume the event from
- * the file descriptor.
+/* For each upcall read the upcall info into the buffer, then create a
+ * thread in a detached state so that resources are released back into
+ * the system without the need for a join.
  */
 static void
 gssd_clnt_gssd_cb(int UNUSED(fd), short UNUSED(which), void *data)
 {
 	struct clnt_info *clp = data;
-	pthread_t th;
-	int ret;
+	struct clnt_upcall_info *info;
 
-	ret = pthread_create(&th, NULL, (void *)handle_gssd_upcall,
-				(void *)clp);
-	if (ret != 0) {
-		printerr(0, "ERROR: pthread_create failed: ret %d: %s\n",
-			 ret, strerror(errno));
+	info = alloc_upcall_info(clp);
+	if (info == NULL)
+		return;
+
+	info->lbuflen = read(clp->gssd_fd, info->lbuf, sizeof(info->lbuf));
+	if (info->lbuflen <= 0 || info->lbuf[info->lbuflen-1] != '\n') {
+		printerr(0, "WARNING: %s: failed reading request\n", __func__);
+		free(info);
 		return;
 	}
-	wait_for_child_and_detach(th);
+	info->lbuf[info->lbuflen-1] = 0;
+
+	if (start_upcall_thread(handle_gssd_upcall, info))
+		free(info);
 }
 
 static void
 gssd_clnt_krb5_cb(int UNUSED(fd), short UNUSED(which), void *data)
 {
 	struct clnt_info *clp = data;
-	pthread_t th;
-	int ret;
+	struct clnt_upcall_info *info;
 
-	ret = pthread_create(&th, NULL, (void *)handle_krb5_upcall,
-				(void *)clp);
-	if (ret != 0) {
-		printerr(0, "ERROR: pthread_create failed: ret %d: %s\n",
-			 ret, strerror(errno));
+	info = alloc_upcall_info(clp);
+	if (info == NULL)
+		return;
+
+	if (read(clp->krb5_fd, &info->uid,
+			sizeof(info->uid)) < (ssize_t)sizeof(info->uid)) {
+		printerr(0, "WARNING: %s: failed reading uid from krb5 "
+			 "upcall pipe: %s\n", __func__, strerror(errno));
+		free(info);
 		return;
 	}
-	wait_for_child_and_detach(th);
+
+	if (start_upcall_thread(handle_krb5_upcall, info))
+		free(info);
 }
 
 static struct clnt_info *