kernel32: Fix a crash with GetLongPathNameW and UNC path names.

d58bd680 · Paul Vriens · Alexandre Julliard · b4b7724a · d58bd680
Commit d58bd680 authored Dec 17, 2009 by Paul Vriens Committed by Alexandre Julliard Dec 17, 2009
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Showing with 9 additions and 3 deletions

path.c dlls/kernel32/path.c +9 -3

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--- a/dlls/kernel32/path.c
+++ b/dlls/kernel32/path.c
@@ -313,9 +313,15 @@ DWORD WINAPI GetLongPathNameW( LPCWSTR shortpath, LPWSTR longpath, DWORD longlen
    if (shortpath[0] == '\\' && shortpath[1] == '\\')
    {
-        ERR("UNC pathname %s\n", debugstr_w(shortpath));
+        FIXME("UNC pathname %s\n", debugstr_w(shortpath));
-        lstrcpynW( longpath, shortpath, longlen );
-        return strlenW(longpath);
+        tmplen = strlenW(shortpath);
+        if (tmplen < longlen)
+        {
+            if (longpath != shortpath) strcpyW( longpath, shortpath );
+            return tmplen;
+        }
+        return tmplen + 1;
    }
    unixabsolute = (shortpath[0] == '/');