1 /* 2 * Copyright (c) 2000, 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 <jni.h> 27 #include "jni_util.h" 28 #include "com_sun_security_auth_module_UnixSystem.h" 29 #include <stdio.h> 30 #include <sys/types.h> 31 #include <unistd.h> 32 #include <stdlib.h> 33 #include <string.h> 34 35 /* For POSIX-compliant getpwuid_r on Solaris */ 36 #if defined(__solaris__) 37 #define _POSIX_PTHREAD_SEMANTICS 38 #endif 39 #include <pwd.h> 40 41 /* 42 * Declare library specific JNI_Onload entry if static build 43 */ 44 DEF_STATIC_JNI_OnLoad 45 46 JNIEXPORT void JNICALL 47 Java_com_sun_security_auth_module_UnixSystem_getUnixInfo 48 (JNIEnv *env, jobject obj) { 49 50 int i; 51 char pwd_buf[1024]; 52 struct passwd *pwd; 53 struct passwd resbuf; 54 jfieldID userNameID; 55 jfieldID userID; 56 jfieldID groupID; 57 jfieldID supplementaryGroupID; 58 59 jstring jstr; 60 jlongArray jgroups; 61 jlong *jgroupsAsArray; 62 jsize numSuppGroups; 63 gid_t *groups; 64 jclass cls; 65 66 numSuppGroups = getgroups(0, NULL); 67 if (numSuppGroups == -1) { 68 return; 69 } 70 groups = (gid_t *)calloc(numSuppGroups, sizeof(gid_t)); 71 if (groups == NULL) { 72 jclass cls = (*env)->FindClass(env,"java/lang/OutOfMemoryError"); 73 if (cls != NULL) 74 (*env)->ThrowNew(env, cls, NULL); 75 return; 76 } 77 78 cls = (*env)->GetObjectClass(env, obj); 79 80 memset(pwd_buf, 0, sizeof(pwd_buf)); 81 82 if (getpwuid_r(getuid(), &resbuf, pwd_buf, sizeof(pwd_buf), &pwd) == 0 && 83 pwd != NULL && 84 getgroups(numSuppGroups, groups) != -1) { 85 86 userNameID = (*env)->GetFieldID(env, cls, "username", "Ljava/lang/String;"); 87 if (userNameID == 0) 88 goto cleanUpAndReturn; 89 90 userID = (*env)->GetFieldID(env, cls, "uid", "J"); 91 if (userID == 0) 92 goto cleanUpAndReturn; 93 94 groupID = (*env)->GetFieldID(env, cls, "gid", "J"); 95 if (groupID == 0) 96 goto cleanUpAndReturn; 97 98 supplementaryGroupID = (*env)->GetFieldID(env, cls, "groups", "[J"); 99 if (supplementaryGroupID == 0) 100 goto cleanUpAndReturn; 101 102 jstr = (*env)->NewStringUTF(env, pwd->pw_name); 103 if (jstr == NULL) 104 goto cleanUpAndReturn; 105 (*env)->SetObjectField(env, obj, userNameID, jstr); 106 107 (*env)->SetLongField(env, obj, userID, pwd->pw_uid); 108 109 (*env)->SetLongField(env, obj, groupID, pwd->pw_gid); 110 111 jgroups = (*env)->NewLongArray(env, numSuppGroups); 112 if (jgroups == NULL) 113 goto cleanUpAndReturn; 114 jgroupsAsArray = (*env)->GetLongArrayElements(env, jgroups, 0); 115 if (jgroupsAsArray == NULL) 116 goto cleanUpAndReturn; 117 for (i = 0; i < numSuppGroups; i++) 118 jgroupsAsArray[i] = groups[i]; 119 (*env)->ReleaseLongArrayElements(env, jgroups, jgroupsAsArray, 0); 120 (*env)->SetObjectField(env, obj, supplementaryGroupID, jgroups); 121 } 122 cleanUpAndReturn: 123 free(groups); 124 return; 125 }