1 files changed, 133 insertions, 0 deletions
diff --git a/src/VBox/Runtime/generic/RTPathGetCurrentDrive-generic.cpp b/src/VBox/Runtime/generic/RTPathGetCurrentDrive-generic.cpp
new file mode 100644
index 00000000..1d2d4698
--- /dev/null
+++ b/src/VBox/Runtime/generic/RTPathGetCurrentDrive-generic.cpp
@@ -0,0 +1,133 @@
+/* $Id: RTPathGetCurrentDrive-generic.cpp $ */
+/** @file
+ * IPRT - RTPathGetCurrentDrive, generic implementation.
+ */
+
+/*
+ * Copyright (C) 2014-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_PATH
+#include <iprt/path.h>
+#include "internal/iprt.h"
+
+#include <iprt/ctype.h>
+#include <iprt/err.h>
+#include <iprt/mem.h>
+#include <iprt/string.h>
+#include "internal/path.h"
+
+
+RTDECL(int) RTPathGetCurrentDrive(char *pszPath, size_t cbPath)
+{
+#ifdef HAVE_DRIVE
+    /*
+     * Query the current directroy and extract the wanted information from it.
+     */
+    char *pszPathFree = NULL;
+    char *pszCwd = pszPath;
+    int rc = RTPathGetCurrent(pszCwd, cbPath);
+    if (RT_SUCCESS(rc))
+    { /* likely */ }
+    else if (rc != VERR_BUFFER_OVERFLOW)
+        return rc;
+    else
+    {
+        pszPathFree = pszCwd = (char *)RTMemTmpAlloc(RTPATH_BIG_MAX);
+        AssertReturn(pszPathFree, VERR_NO_TMP_MEMORY);
+        rc = RTPathGetCurrent(pszCwd, RTPATH_BIG_MAX);
+    }
+    if (RT_SUCCESS(rc))
+    {
+        /*
+         * Drive letter? Chop off at root slash.
+         */
+        if (pszCwd[0] && RTPATH_IS_VOLSEP(pszCwd[1]))
+            pszCwd[2] = '\0';
+        /*
+         * UNC? Chop off after share.
+         */
+        else if (   RTPATH_IS_SLASH(pszCwd[0])
+                 && RTPATH_IS_SLASH(pszCwd[1])
+                 && !RTPATH_IS_SLASH(pszCwd[2])
+                 && pszCwd[2])
+        {
+            /* Work thru the server name. */
+            size_t off = 3;
+            while (!RTPATH_IS_SLASH(pszCwd[off]) && pszCwd[off])
+                off++;
+            size_t offServerSlash = off;
+
+            /* Is there a share name? */
+            if (RTPATH_IS_SLASH(pszCwd[off]))
+            {
+                while (RTPATH_IS_SLASH(pszCwd[off]))
+                    off++;
+                if (pszCwd[off])
+                {
+                    /* Work thru the share name. */
+                    while (!RTPATH_IS_SLASH(pszCwd[off]) && pszCwd[off])
+                        off++;
+                }
+                /* No share name, chop at server name. */
+                else
+                    off = offServerSlash;
+            }
+            pszCwd[off] = '\0';
+        }
+        else
+            rc = VERR_INTERNAL_ERROR_4;
+    }
+    if (pszPathFree)
+    {
+        if (RT_SUCCESS(rc))
+            rc = RTStrCopy(pszPath, cbPath, pszCwd);
+        RTMemTmpFree(pszPathFree);
+    }
+    return rc;
+
+#else  /* !HAVE_DRIVE */
+    /*
+     * No drive letters on this system, return empty string.
+     */
+    if (cbPath > 0)
+    {
+        *pszPath = '\0';
+        return VINF_SUCCESS;
+    }
+    return VERR_BUFFER_OVERFLOW;
+#endif /* !HAVE_DRIVE */
+}
+RT_EXPORT_SYMBOL(RTPathGetCurrentDrive);
+