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 static inline char *convertToNFD(const char *path, char *buf, size_t bufsize) 38 { 39 CFMutableStringRef mutable = CFStringCreateMutable(NULL, 0); 40 CFStringAppendCString(mutable, path, kCFStringEncodingUTF8); 41 CFStringNormalize(mutable, kCFStringNormalizationFormD); 42 43 CFStringGetCString(mutable, buf, bufsize, kCFStringEncodingUTF8); 44 45 CFRelease(mutable); 46 return buf; 47 } 48 49 /* Converts the path to NFD form if it was in NFC form. Returns a pointer to 50 * the converting string which could be buf (if the converstion took place) or 51 * origPath if no conversion was needed 52 */ 53 __private_extern__ 54 char* convertToNFDIfNeeded(const char *origPath, char *buf, size_t bufsize) 55 { 56 const char *current = origPath; 57 int c; 58 for (c = *current; c != 0; current++, c = *current) { 59 if (c < 0) { 60 // Need to convert 61 return convertToNFD(origPath, buf, bufsize); 62 } 63 } 64 65 return (char *)origPath; 66 } 67 68 #endif 69 70 void 71 fileOpen(JNIEnv *env, jobject this, jstring path, jfieldID fid, int flags) 72 { 73 WITH_PLATFORM_STRING(env, path, ps) { 74 FD fd; 75 76 #if defined(__linux__) || defined(_ALLBSD_SOURCE) 77 /* Remove trailing slashes, since the kernel won't */ 78 char *p = (char *)ps + strlen(ps) - 1; 79 while ((p > ps) && (*p == '/')) 80 *p-- = '\0'; 81 #endif 82 fd = JVM_Open(ps, flags, 0666); 83 if (fd >= 0) { 84 SET_FD(this, fd, fid); 85 } else { 86 throwFileNotFoundException(env, path); 87 } 88 } END_PLATFORM_STRING(env, ps); 89 } 90 91 92 void 93 fileClose(JNIEnv *env, jobject this, jfieldID fid) 94 { 95 FD fd = GET_FD(this, fid); 96 if (fd == -1) { 97 return; 98 } 99 100 /* Set the fd to -1 before closing it so that the timing window 101 * of other threads using the wrong fd (closed but recycled fd, 102 * that gets re-opened with some other filename) is reduced. 103 * Practically the chance of its occurance is low, however, we are 104 * taking extra precaution over here. 105 */ 106 SET_FD(this, -1, fid); 107 108 /* 109 * Don't close file descriptors 0, 1, or 2. If we close these stream 110 * then a subsequent file open or socket will use them. Instead we 111 * just redirect these file descriptors to /dev/null. 112 */ 113 if (fd >= STDIN_FILENO && fd <= STDERR_FILENO) { 114 int devnull = open("/dev/null", O_WRONLY); 115 if (devnull < 0) { 116 SET_FD(this, fd, fid); // restore fd 117 JNU_ThrowIOExceptionWithLastError(env, "open /dev/null failed"); 118 } else { 119 dup2(devnull, fd); 120 close(devnull); 121 } 122 } else if (JVM_Close(fd) == -1) { 123 JNU_ThrowIOExceptionWithLastError(env, "close failed"); 124 } 125 }