Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 163 insertions, 0 deletions

diff --git a/src/VBox/Runtime/r3/posix/RTPathUserHome-posix.cpp b/src/VBox/Runtime/r3/posix/RTPathUserHome-posix.cpp
new file mode 100644
index 00000000..932bd0f5
--- /dev/null
+++ b/src/VBox/Runtime/r3/posix/RTPathUserHome-posix.cpp
@@ -0,0 +1,163 @@
+/* $Id: RTPathUserHome-posix.cpp $ */
+/** @file
+ * IPRT - Path Manipulation, POSIX.
+ */
+
+/*
+ * Copyright (C) 2006-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_PATH
+#include <stdlib.h>
+#include <limits.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <pwd.h>
+
+#include <iprt/path.h>
+#include <iprt/env.h>
+#include <iprt/assert.h>
+#include <iprt/string.h>
+#include <iprt/err.h>
+#include <iprt/log.h>
+#include "internal/path.h"
+#include "internal/fs.h"
+
+
+#ifndef RT_OS_L4
+/**
+ * Worker for RTPathUserHome that looks up the home directory
+ * using the getpwuid_r api.
+ *
+ * @returns IPRT status code.
+ * @param   pszPath     The path buffer.
+ * @param   cchPath     The size of the buffer.
+ * @param   uid         The User ID to query the home directory of.
+ */
+static int rtPathUserHomeByPasswd(char *pszPath, size_t cchPath, uid_t uid)
+{
+    /*
+     * The getpwuid_r function uses the passed in buffer to "allocate" any
+     * extra memory it needs. On some systems we should probably use the
+     * sysconf function to find the appropriate buffer size, but since it won't
+     * work everywhere we'll settle with a 5KB buffer and ASSUME that it'll
+     * suffice for even the lengthiest user descriptions...
+     */
+    char            achBuffer[5120];
+    struct passwd   Passwd;
+    struct passwd  *pPasswd;
+    memset(&Passwd, 0, sizeof(Passwd));
+    int rc = getpwuid_r(uid, &Passwd, &achBuffer[0], sizeof(achBuffer), &pPasswd);
+    if (rc != 0)
+        return RTErrConvertFromErrno(rc);
+    if (!pPasswd) /* uid not found in /etc/passwd */
+        return VERR_PATH_NOT_FOUND;
+
+    /*
+     * Check that it isn't empty and that it exists.
+     */
+    struct stat st;
+    if (    !pPasswd->pw_dir
+        ||  !*pPasswd->pw_dir
+        ||  stat(pPasswd->pw_dir, &st)
+        ||  !S_ISDIR(st.st_mode))
+        return VERR_PATH_NOT_FOUND;
+
+    /*
+     * Convert it to UTF-8 and copy it to the return buffer.
+     */
+    return rtPathFromNativeCopy(pszPath, cchPath, pPasswd->pw_dir, NULL);
+}
+#endif
+
+
+/**
+ * Worker for RTPathUserHome that looks up the home directory
+ * using the HOME environment variable.
+ *
+ * @returns IPRT status code.
+ * @param   pszPath     The path buffer.
+ * @param   cchPath     The size of the buffer.
+ */
+static int rtPathUserHomeByEnv(char *pszPath, size_t cchPath)
+{
+    /*
+     * Get HOME env. var it and validate it's existance.
+     */
+    int         rc      = VERR_PATH_NOT_FOUND;
+    const char *pszHome = RTEnvGet("HOME"); /** @todo Codeset confusion in RTEnv. */
+    if (pszHome)
+
+    {
+        struct stat st;
+        if (    !stat(pszHome, &st)
+            &&  S_ISDIR(st.st_mode))
+            rc = rtPathFromNativeCopy(pszPath, cchPath, pszHome, NULL);
+    }
+    return rc;
+}
+
+
+RTDECL(int) RTPathUserHome(char *pszPath, size_t cchPath)
+{
+    int rc;
+#ifndef RT_OS_L4
+    /*
+     * We make an exception for the root user and use the system call
+     * getpwuid_r to determine their initial home path instead of
+     * reading it from the $HOME variable.  This is because the $HOME
+     * variable does not get changed by sudo (and possibly su and others)
+     * which can cause root-owned files to appear in user's home folders.
+     */
+     uid_t uid = geteuid();
+     if (!uid)
+         rc = rtPathUserHomeByPasswd(pszPath, cchPath, uid);
+     else
+         rc = rtPathUserHomeByEnv(pszPath, cchPath);
+
+     /*
+      * On failure, retry using the alternative method.
+      * (Should perhaps restrict the retry cases a bit more here...)
+      */
+     if (   RT_FAILURE(rc)
+         && rc != VERR_BUFFER_OVERFLOW)
+     {
+         if (!uid)
+             rc = rtPathUserHomeByEnv(pszPath, cchPath);
+         else
+             rc = rtPathUserHomeByPasswd(pszPath, cchPath, uid);
+     }
+#else  /* RT_OS_L4 */
+    rc = rtPathUserHomeByEnv(pszPath, cchPath);
+#endif /* RT_OS_L4 */
+
+    LogFlow(("RTPathUserHome(%p:{%s}, %u): returns %Rrc\n", pszPath,
+             RT_SUCCESS(rc) ? pszPath : "<failed>",  cchPath, rc));
+    return rc;
+}
+