1 /* 2 * Copyright (c) 2001, 2010, 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 "jni.h" 27 #include "jni_util.h" 28 #include "jvm.h" 29 #include "io_util.h" 30 #include "io_util_md.h" 31 #include <string.h> 32 33 #ifdef MACOSX 34 35 #include <CoreFoundation/CoreFoundation.h> 36 37 __private_extern__ 38 jstring newStringPlatform(JNIEnv *env, const char* str) 39 { 40 jstring rv = NULL; 41 CFMutableStringRef csref = CFStringCreateMutable(NULL, 0); 42 CFStringAppendCString(csref, str, kCFStringEncodingUTF8); 43 CFStringNormalize(csref, kCFStringNormalizationFormC); 44 int clen = CFStringGetLength(csref); 45 int ulen = (clen + 1) * 2; // utf16 + zero padding 46 char* chars = malloc(ulen); 47 if (chars != NULL) { 48 if (CFStringGetCString(csref, chars, ulen, kCFStringEncodingUTF16)) { 49 rv = (*env)->NewString(env, (jchar*)chars, clen); 50 } 51 free(chars); 52 } 53 CFRelease(csref); 54 return rv; 55 } 56 #endif 57 58 void 59 fileOpen(JNIEnv *env, jobject this, jstring path, jfieldID fid, int flags) 60 { 61 WITH_PLATFORM_STRING(env, path, ps) { 62 FD fd; 63 64 #if defined(__linux__) || defined(_ALLBSD_SOURCE) 65 /* Remove trailing slashes, since the kernel won't */ 66 char *p = (char *)ps + strlen(ps) - 1; 67 while ((p > ps) && (*p == '/')) 68 *p-- = '\0'; 69 #endif 70 fd = JVM_Open(ps, flags, 0666); 71 if (fd >= 0) { 72 SET_FD(this, fd, fid); 73 } else { 74 throwFileNotFoundException(env, path); 75 } 76 } END_PLATFORM_STRING(env, ps); 77 } 78 79 80 void 81 fileClose(JNIEnv *env, jobject this, jfieldID fid) 82 { 83 FD fd = GET_FD(this, fid); 84 if (fd == -1) { 85 return; 86 } 87 88 /* Set the fd to -1 before closing it so that the timing window 89 * of other threads using the wrong fd (closed but recycled fd, 90 * that gets re-opened with some other filename) is reduced. 91 * Practically the chance of its occurance is low, however, we are 92 * taking extra precaution over here. 93 */ 94 SET_FD(this, -1, fid); 95 96 /* 97 * Don't close file descriptors 0, 1, or 2. If we close these stream 98 * then a subsequent file open or socket will use them. Instead we 99 * just redirect these file descriptors to /dev/null. 100 */ 101 if (fd >= STDIN_FILENO && fd <= STDERR_FILENO) { 102 int devnull = open("/dev/null", O_WRONLY); 103 if (devnull < 0) { 104 SET_FD(this, fd, fid); // restore fd 105 JNU_ThrowIOExceptionWithLastError(env, "open /dev/null failed"); 106 } else { 107 dup2(devnull, fd); 108 close(devnull); 109 } 110 } else if (JVM_Close(fd) == -1) { 111 JNU_ThrowIOExceptionWithLastError(env, "close failed"); 112 } 113 }