From 1fc8f7a47d7d6db0c7ef6f554595670124b319c5 Mon Sep 17 00:00:00 2001
From: Michael Gernoth <michael@gernoth.net>
Date: Tue, 23 Sep 2008 16:23:20 +0200
Subject: [PATCH] cable sharing for USB needs to overload semop, this adds a
 disabled stub

---
 usb-driver.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/usb-driver.c b/usb-driver.c
index 26ce16b..e2f275f 100644
--- a/usb-driver.c
+++ b/usb-driver.c
@@ -39,6 +39,8 @@
 #include <sys/ioctl.h>
 #include <sys/utsname.h>
 #include <bits/wordsize.h>
+#include <sys/ipc.h>
+#include <sys/sem.h>
 #include "usb-driver.h"
 #include "config.h"
 #include "xpcu.h"
@@ -624,6 +626,29 @@ int access(const char *pathname, int mode) {
 	}
 }
 
+#if 0
+/* USB cable sharing needs to overload semop, TODO! */
+int semop (int __semid, struct sembuf *__sops, size_t __nsops) {
+	static int (*func) (int, struct sembuf*, size_t) = NULL;
+	int i;
+
+	if (!func)
+		func = (int (*) (int, struct sembuf*, size_t)) dlsym(RTLD_NEXT, "semop");
+	
+	fprintf(stderr,"semop: semid: 0x%X, elements: %d\n", __semid, __nsops);
+	for (i = 0; i < __nsops; i++) {
+		fprintf(stderr, " num: %u, op: %d, flg: %d\n", __sops[i].sem_num, __sops[i].sem_op, __sops[i].sem_flg);
+		if (__sops[i].sem_op < 0) {
+			fprintf(stderr, "SEMAPHORE LOCK\n");
+		} else {
+			fprintf(stderr, "SEMAPHORE UNLOCK\n");
+		}
+	}
+
+	return (*func)(__semid, __sops, __nsops);
+}
+#endif
+
 #if __WORDSIZE == 32
 int uname (struct utsname *__name) {
 	static int (*func) (struct utsname*);
-- 
2.39.5