1 files changed, 179 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/posix/env-posix.cpp b/src/VBox/Runtime/r3/posix/env-posix.cpp
new file mode 100644
index 00000000..60a9112e
--- /dev/null
+++ b/src/VBox/Runtime/r3/posix/env-posix.cpp
@@ -0,0 +1,179 @@
+/* $Id: env-posix.cpp $ */
+/** @file
+ * IPRT - Environment, 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                                                                                                                 *
+*********************************************************************************************************************************/
+#ifdef RT_OS_DARWIN
+/* pick the correct prototype for unsetenv. */
+# define _POSIX_C_SOURCE 1
+#endif
+#include <iprt/env.h>
+
+#include <iprt/alloca.h>
+#include <iprt/assert.h>
+#if defined(DEBUG) && defined(RT_OS_LINUX)
+# include <iprt/asm.h>
+#endif
+#include <iprt/err.h>
+#include <iprt/string.h>
+
+#include <stdlib.h>
+#include <errno.h>
+
+#include "internal/alignmentchecks.h"
+
+
+RTDECL(bool) RTEnvExistsBad(const char *pszVar)
+{
+    AssertReturn(strchr(pszVar, '=') == NULL, false);
+    return RTEnvGetBad(pszVar) != NULL;
+}
+
+
+RTDECL(bool) RTEnvExist(const char *pszVar)
+{
+    return RTEnvExistsBad(pszVar);
+}
+
+
+RTDECL(const char *) RTEnvGetBad(const char *pszVar)
+{
+    AssertReturn(strchr(pszVar, '=') == NULL, NULL);
+
+    IPRT_ALIGNMENT_CHECKS_DISABLE(); /* glibc causes trouble */
+    const char *pszValue = getenv(pszVar);
+    IPRT_ALIGNMENT_CHECKS_ENABLE();
+    return pszValue;
+}
+
+
+RTDECL(const char *) RTEnvGet(const char *pszVar)
+{
+    return RTEnvGetBad(pszVar);
+}
+
+
+RTDECL(int) RTEnvPutBad(const char *pszVarEqualValue)
+{
+    /** @todo putenv is a source memory leaks. deal with this on a per system basis. */
+    if (!putenv((char *)pszVarEqualValue))
+        return 0;
+    return RTErrConvertFromErrno(errno);
+}
+
+
+RTDECL(int) RTEnvPut(const char *pszVarEqualValue)
+{
+    return RTEnvPutBad(pszVarEqualValue);
+}
+
+
+RTDECL(int) RTEnvSetBad(const char *pszVar, const char *pszValue)
+{
+    AssertMsgReturn(strchr(pszVar, '=') == NULL, ("'%s'\n", pszVar), VERR_ENV_INVALID_VAR_NAME);
+
+#if defined(_MSC_VER)
+    /* make a local copy and feed it to putenv. */
+    const size_t cchVar = strlen(pszVar);
+    const size_t cchValue = strlen(pszValue);
+    char *pszTmp = (char *)alloca(cchVar + cchValue + 2 + !*pszValue);
+    memcpy(pszTmp, pszVar, cchVar);
+    pszTmp[cchVar] = '=';
+    if (*pszValue)
+        memcpy(pszTmp + cchVar + 1, pszValue, cchValue + 1);
+    else
+    {
+        pszTmp[cchVar + 1] = ' '; /* wrong, but putenv will remove it otherwise. */
+        pszTmp[cchVar + 2] = '\0';
+    }
+
+    if (!putenv(pszTmp))
+        return 0;
+    return RTErrConvertFromErrno(errno);
+
+#else
+    if (!setenv(pszVar, pszValue, 1))
+        return VINF_SUCCESS;
+    return RTErrConvertFromErrno(errno);
+#endif
+}
+
+
+RTDECL(int) RTEnvSet(const char *pszVar, const char *pszValue)
+{
+    return RTEnvSetBad(pszVar, pszValue);
+}
+
+RTDECL(int) RTEnvUnsetBad(const char *pszVar)
+{
+    AssertReturn(strchr(pszVar, '=') == NULL, VERR_ENV_INVALID_VAR_NAME);
+
+    /*
+     * Check that it exists first.
+     */
+    if (!RTEnvExist(pszVar))
+        return VINF_ENV_VAR_NOT_FOUND;
+
+    /*
+     * Ok, try remove it.
+     */
+#ifdef RT_OS_WINDOWS
+    /* Use putenv(var=) since Windows does not have unsetenv(). */
+    size_t cchVar = strlen(pszVar);
+    char *pszBuf = (char *)alloca(cchVar + 2);
+    memcpy(pszBuf, pszVar, cchVar);
+    pszBuf[cchVar]     = '=';
+    pszBuf[cchVar + 1] = '\0';
+
+    if (!putenv(pszBuf))
+        return VINF_SUCCESS;
+
+#else
+    /* This is the preferred function as putenv() like used above does neither work on Solaris nor on Darwin. */
+    if (!unsetenv((char*)pszVar))
+        return VINF_SUCCESS;
+#endif
+
+    return RTErrConvertFromErrno(errno);
+}
+
+RTDECL(int) RTEnvUnset(const char *pszVar)
+{
+    return RTEnvUnsetBad(pszVar);
+}
+