1/*
2 * Copyright (c) 2008, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#include <errno.h>
27#include <string.h>
28
29#include "jni.h"
30#include "jni_util.h"
31#include "dlfcn.h"
32
33#if defined(LINUX) && (defined(_GNU_SOURCE) || \
34 (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE < 200112L \
35 && defined(_XOPEN_SOURCE) && _XOPEN_SOURCE < 600))
36extern int __xpg_strerror_r(int, char *, size_t);
37#define strerror_r(a, b, c) __xpg_strerror_r((a), (b), (c))
38#endif
39
40void* getProcessHandle() {
41 static void *procHandle = NULL;
42 if (procHandle != NULL) {
43 return procHandle;
44 }
45#ifdef __APPLE__
46 procHandle = (void*)dlopen(NULL, RTLD_FIRST);
47#else
48 procHandle = (void*)dlopen(NULL, RTLD_LAZY);
49#endif
50 return procHandle;
51}
52
53void buildJniFunctionName(const char *sym, const char *cname,
54 char *jniEntryName) {
55 strcpy(jniEntryName, sym);
56 if (cname != NULL) {
57 strcat(jniEntryName, "_");
58 strcat(jniEntryName, cname);
59 }
60}
61
62JNIEXPORT size_t JNICALL
63getLastErrorString(char *buf, size_t len)
64{
65 if (errno == 0 || len < 1) return 0;
66 getErrorString(errno, buf, len);
67 return strlen(buf);
68}
69
70JNIEXPORT int JNICALL
71getErrorString(int err, char *buf, size_t len)
72{
73 if (err == 0 || len < 1) return 0;
74 return strerror_r(err, buf, len);
75}
76