1 /*
   2  * Copyright (c) 2008, 2014, 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))
  36 extern int __xpg_strerror_r(int, char *, size_t);
  37 #define strerror_r(a, b, c) __xpg_strerror_r((a), (b), (c))
  38 #endif
  39 
  40 void* 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 
  53 void 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 
  62 size_t
  63 getLastErrorString(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 
  70 int
  71 getErrorString(int err, char *buf, size_t len)
  72 {
  73     if (err == 0 || len < 1) return 0;
  74     return strerror_r(err, buf, len);
  75 }
--- EOF ---