From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:17:27 +0200
Subject: Adding upstream version 7.0.14-dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/VBox/Runtime/r3/posix/filelock-posix.cpp | 148 +++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100644 src/VBox/Runtime/r3/posix/filelock-posix.cpp

(limited to 'src/VBox/Runtime/r3/posix/filelock-posix.cpp')

diff --git a/src/VBox/Runtime/r3/posix/filelock-posix.cpp b/src/VBox/Runtime/r3/posix/filelock-posix.cpp
new file mode 100644
index 00000000..3a0e230f
--- /dev/null
+++ b/src/VBox/Runtime/r3/posix/filelock-posix.cpp
@@ -0,0 +1,148 @@
+/* $Id: filelock-posix.cpp $ */
+/** @file
+ * IPRT - File Locking, POSIX.
+ */
+
+/*
+ * Copyright (C) 2006-2023 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_FILE
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/time.h>
+
+#include <iprt/file.h>
+#include <iprt/assert.h>
+#include <iprt/string.h>
+#include <iprt/err.h>
+#include <iprt/log.h>
+#include "internal/file.h"
+#include "internal/fs.h"
+
+
+
+
+RTR3DECL(int)  RTFileLock(RTFILE hFile, unsigned fLock, int64_t offLock, uint64_t cbLock)
+{
+    Assert(offLock >= 0);
+
+    /* Check arguments. */
+    if (fLock & ~RTFILE_LOCK_MASK)
+    {
+        AssertMsgFailed(("Invalid fLock=%08X\n", fLock));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Validate offset.
+     */
+    if (    sizeof(off_t) < sizeof(cbLock)
+        &&  (    (offLock >> 32) != 0
+             ||  (cbLock >> 32) != 0
+             ||  ((offLock + cbLock) >> 32) != 0))
+    {
+        AssertMsgFailed(("64-bit file i/o not supported! offLock=%lld cbLock=%lld\n", offLock, cbLock));
+        return VERR_NOT_SUPPORTED;
+    }
+
+    /* Prepare flock structure. */
+    struct flock fl;
+    Assert(RTFILE_LOCK_WRITE);
+    fl.l_type   = (fLock & RTFILE_LOCK_WRITE) ? F_WRLCK : F_RDLCK;
+    fl.l_whence = SEEK_SET;
+    fl.l_start  = (off_t)offLock;
+    fl.l_len    = (off_t)cbLock;
+    fl.l_pid    = 0;
+
+    Assert(RTFILE_LOCK_WAIT);
+    if (fcntl(RTFileToNative(hFile), (fLock & RTFILE_LOCK_WAIT) ? F_SETLKW : F_SETLK, &fl) >= 0)
+        return VINF_SUCCESS;
+
+    int iErr = errno;
+    if (    iErr == EAGAIN
+        ||  iErr == EACCES)
+        return VERR_FILE_LOCK_VIOLATION;
+
+    return RTErrConvertFromErrno(iErr);
+}
+
+
+RTR3DECL(int)  RTFileChangeLock(RTFILE hFile, unsigned fLock, int64_t offLock, uint64_t cbLock)
+{
+    /** @todo We never returns VERR_FILE_NOT_LOCKED for now. */
+    return RTFileLock(hFile, fLock, offLock, cbLock);
+}
+
+
+RTR3DECL(int)  RTFileUnlock(RTFILE hFile, int64_t offLock, uint64_t cbLock)
+{
+    Assert(offLock >= 0);
+
+    /*
+     * Validate offset.
+     */
+    if (    sizeof(off_t) < sizeof(cbLock)
+        &&  (    (offLock >> 32) != 0
+             ||  (cbLock >> 32) != 0
+             ||  ((offLock + cbLock) >> 32) != 0))
+    {
+        AssertMsgFailed(("64-bit file i/o not supported! offLock=%lld cbLock=%lld\n", offLock, cbLock));
+        return VERR_NOT_SUPPORTED;
+    }
+
+    /* Prepare flock structure. */
+    struct flock fl;
+    fl.l_type   = F_UNLCK;
+    fl.l_whence = SEEK_SET;
+    fl.l_start  = (off_t)offLock;
+    fl.l_len    = (off_t)cbLock;
+    fl.l_pid    = 0;
+
+    if (fcntl(RTFileToNative(hFile), F_SETLK, &fl) >= 0)
+        return VINF_SUCCESS;
+
+    /** @todo check error codes for non existing lock. */
+    int iErr = errno;
+    if (    iErr == EAGAIN
+        ||  iErr == EACCES)
+        return VERR_FILE_LOCK_VIOLATION;
+
+    return RTErrConvertFromErrno(iErr);
+}
+
-- 
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