Avoid possible overflow in fn_identity.

diff --git a/src/data/file-name.c b/src/data/file-name.c
index dfdfa6d223c89c3821cee5002e3370364f5edb2d..f59b2fa4ecd9bdcc367c1acffefe017859e6ad13 100644 (file)
--- a/src/data/file-name.c
+++ b/src/data/file-name.c
@@ -220,8 +220,8 @@ fn_close (const char *fn, FILE *f)
    there. */
 struct file_identity
 {
-  dev_t device;               /* Device number. */
-  ino_t inode;                /* Inode number. */
+  unsigned long long device;               /* Device number. */
+  unsigned long long inode;                /* Inode number. */
   char *name;                 /* File name, where needed, otherwise NULL. */
 };
 
@@ -271,7 +271,9 @@ fn_get_identity (const char *file_name)
     if (ok)
       {
        identity->device = fi.dwVolumeSerialNumber;
-       identity->inode = fi.nFileIndexHigh << 16 | fi.nFileIndexLow;
+       identity->inode = fi.nFileIndexHigh;
+       identity->inode <<= (sizeof fi.nFileIndexLow) * CHAR_BIT;
+       identity->inode |= fi.nFileIndexLow;
        identity->name = 0;
       }
     CloseHandle (h);