From bafc89a858e658dbd56ce74b808260c2ad67f0d5 Mon Sep 17 00:00:00 2001
From: Marcel Holtmann <marcel@holtmann.org>
Date: Sat, 4 Sep 2010 22:51:38 +0200
Subject: udev: Check for valid USB serial numbers

---
 plugins/udev.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'plugins')

diff --git a/plugins/udev.c b/plugins/udev.c
index 6720a0cd..38a63127 100644
--- a/plugins/udev.c
+++ b/plugins/udev.c
@@ -24,6 +24,7 @@
 #endif
 
 #include <errno.h>
+#include <ctype.h>
 
 #include <libudev.h>
 
@@ -86,8 +87,14 @@ static const char *get_serial(struct udev_device *udev_device)
 		entry = udev_list_entry_get_next(entry);
 	}
 
-	if (serial && strpbrk(serial, ".-_?*") != NULL)
-		return NULL;
+	if (serial != NULL) {
+		unsigned int i, len = strlen(serial);
+
+		for (i = 0; i < len; i++) {
+			if (!isalnum(serial[i]))
+				return NULL;
+		}
+	}
 
 	return serial;
 }
-- 
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