1 files changed, 113 insertions, 0 deletions
diff --git a/src/VBox/Additions/linux/sharedfolders/vbsfmount.c b/src/VBox/Additions/linux/sharedfolders/vbsfmount.c
new file mode 100644
index 00000000..72d9210e
--- /dev/null
+++ b/src/VBox/Additions/linux/sharedfolders/vbsfmount.c
@@ -0,0 +1,113 @@
+/* $Id: vbsfmount.c $ */
+/** @file
+ * vbsfmount - Commonly used code to mount shared folders on Linux-based
+ *             systems.  Currently used by mount.vboxsf and VBoxService.
+ */
+
+/*
+ * Copyright (C) 2010-2023 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>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif
+#include <assert.h>
+#include <ctype.h>
+#include <mntent.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/mount.h>
+
+#include "vbsfmount.h"
+
+
+/** @todo Use defines for return values! */
+int vbsfmount_complete(const char *pszSharedFolder, const char *pszMountPoint,
+                       unsigned long fFlags, const char *pszOpts)
+{
+    /*
+     * Combine pszOpts and fFlags.
+     */
+    int          rc;
+    size_t const cchFlags = (fFlags & MS_NOSUID ? strlen(MNTOPT_NOSUID) + 1 : 0)
+                          + (fFlags & MS_RDONLY ? strlen(MNTOPT_RO) : strlen(MNTOPT_RW));
+    size_t const cchOpts  = pszOpts ? 1 + strlen(pszOpts) : 0;
+    char        *pszBuf   = (char *)malloc(cchFlags + cchOpts + 8);
+    if (pszBuf)
+    {
+        char         *psz = pszBuf;
+        FILE         *pMTab;
+
+        strcpy(psz, fFlags & MS_RDONLY ? MNTOPT_RO : MNTOPT_RW);
+        psz += strlen(psz);
+
+        if (fFlags & MS_NOSUID)
+        {
+            *psz++ = ',';
+            strcpy(psz, MNTOPT_NOSUID);
+            psz += strlen(psz);
+        }
+
+        if (cchOpts)
+        {
+            *psz++ = ',';
+            strcpy(psz, pszOpts);
+        }
+
+        assert(strlen(pszBuf) <= cchFlags + cchOpts);
+
+        /*
+         * Open the mtab and update it:
+         */
+        pMTab = setmntent(MOUNTED, "a+");
+        if (pMTab)
+        {
+            struct mntent Entry;
+            Entry.mnt_fsname = (char*)pszSharedFolder;
+            Entry.mnt_dir = (char *)pszMountPoint;
+            Entry.mnt_type = "vboxsf";
+            Entry.mnt_opts = pszBuf;
+            Entry.mnt_freq = 0;
+            Entry.mnt_passno = 0;
+
+            if (!addmntent(pMTab, &Entry))
+                rc = 0; /* success. */
+            else
+                rc = 3;  /* Could not add an entry to the mount table. */
+
+            endmntent(pMTab);
+        }
+        else
+            rc = 2; /* Could not open mount table for update. */
+
+        free(pszBuf);
+    }
+    else
+        rc = 1; /* allocation error */
+    return rc;
+}
+