From 194b2ca887f44e6c3e0244e7f4733060e7aa1618 Mon Sep 17 00:00:00 2001
From: Dominik Riebeling <Dominik.Riebeling@gmail.com>
Date: Sun, 4 May 2008 11:59:04 +0000
Subject: Check for permission denied error when trying to access the player
 and inform the user that raw disc access permissions are required.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17351 a1c6a512-1295-4272-9138-f99709370657
---
 rbutil/ipodpatcher/ipodio-posix.c |  4 +++-
 rbutil/ipodpatcher/ipodio-win32.c |  5 ++++-
 rbutil/ipodpatcher/ipodpatcher.c  | 19 +++++++++++++++++--
 3 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/rbutil/ipodpatcher/ipodio-posix.c b/rbutil/ipodpatcher/ipodio-posix.c
index 55f0187263..c62e0c8275 100644
--- a/rbutil/ipodpatcher/ipodio-posix.c
+++ b/rbutil/ipodpatcher/ipodio-posix.c
@@ -25,6 +25,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
+#include <errno.h>
 
 #include "ipodio.h"
 
@@ -105,7 +106,8 @@ int ipod_open(struct ipod_t* ipod, int silent)
     ipod->dh=open(ipod->diskname,O_RDONLY);
     if (ipod->dh < 0) {
         if (!silent) perror(ipod->diskname);
-        return -1;
+        if(errno == EACCES) return -2;
+        else return -1;
     }
 
     /* Read information about the disk */
diff --git a/rbutil/ipodpatcher/ipodio-win32.c b/rbutil/ipodpatcher/ipodio-win32.c
index 2f75153c3a..985ec4ec4b 100644
--- a/rbutil/ipodpatcher/ipodio-win32.c
+++ b/rbutil/ipodpatcher/ipodio-win32.c
@@ -78,7 +78,10 @@ int ipod_open(struct ipod_t* ipod, int silent)
 
     if (ipod->dh == INVALID_HANDLE_VALUE) {
         if (!silent) print_error(" Error opening disk: ");
-        return -1;
+        if(GetLastError() == ERROR_ACCESS_DENIED)
+            return -2;
+        else
+            return -1;
     }
 
     if (!lock_volume(ipod->dh)) {
diff --git a/rbutil/ipodpatcher/ipodpatcher.c b/rbutil/ipodpatcher/ipodpatcher.c
index 08ba9263d2..d9048f24cc 100644
--- a/rbutil/ipodpatcher/ipodpatcher.c
+++ b/rbutil/ipodpatcher/ipodpatcher.c
@@ -1260,12 +1260,16 @@ int getmodel(struct ipod_t* ipod, int ipod_version)
     return 0;
 }
 
+/* returns number of found ipods or -1 if no ipods found and permission
+ * for raw disc access was denied. */
 int ipod_scan(struct ipod_t* ipod)
 {
     int i;
     int n = 0;
     int ipod_version;
     char last_ipod[4096];
+    int denied = 0;
+    int result;
 
     printf("[INFO] Scanning disk devices...\n");
 
@@ -1282,7 +1286,10 @@ int ipod_scan(struct ipod_t* ipod)
 #else
     #error No disk paths defined for this platform
 #endif
-         if (ipod_open(ipod, 1) < 0) {
+         if ((result = ipod_open(ipod, 1)) < 0) {
+             if(result == -2) {
+                 denied++;
+             }
              continue;
          }
 
@@ -1319,7 +1326,15 @@ int ipod_scan(struct ipod_t* ipod)
         /* Remember the disk name */
         strcpy(ipod->diskname,last_ipod);
     }
-    return n;
+    else if(n == 0 && denied) {
+        printf("[ERR]  FATAL: Permission denied on %d device(s) and no ipod detected.\n", denied);
+#ifdef __WIN32__
+        printf("[ERR]  You need to run this program with administrator priviledges!\n");
+#else
+        printf("[ERR]  You need permissions for raw disc access for this program to work!\n");
+#endif
+    }
+    return (n == 0 && denied) ? -1 : n;
 }
 
 static void put_int32le(uint32_t x, unsigned char* p)
-- 
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