1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1998,2003 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate /*
30*0Sstevel@tonic-gate * This file contains native methods for the Java SLP implementation.
31*0Sstevel@tonic-gate * So far this is just the syslog function.
32*0Sstevel@tonic-gate *
33*0Sstevel@tonic-gate * The file also contains two support functions, one for throwing exceptions
34*0Sstevel@tonic-gate * given a class name, and one for correctly converting unicode Strings to C
35*0Sstevel@tonic-gate * byte arrays.
36*0Sstevel@tonic-gate */
37*0Sstevel@tonic-gate
38*0Sstevel@tonic-gate #include <malloc.h>
39*0Sstevel@tonic-gate #include <jni.h>
40*0Sstevel@tonic-gate #include <syslog.h>
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate #define CLASS_JAVA_LANG_OUTOFMEMORYERROR "java/lang/OutOfMemoryError"
43*0Sstevel@tonic-gate #define CLASS_JAVA_LANG_STRING "java/lang/String"
44*0Sstevel@tonic-gate
45*0Sstevel@tonic-gate #define METHOD_GETBYTES "getBytes"
46*0Sstevel@tonic-gate
47*0Sstevel@tonic-gate #define SIG_JAVA_LANG_STRING_GETBYTES "()[B"
48*0Sstevel@tonic-gate
49*0Sstevel@tonic-gate /*
50*0Sstevel@tonic-gate * Given a class name of an exception and a message attempt to throw
51*0Sstevel@tonic-gate * a new instance of the exception.
52*0Sstevel@tonic-gate */
53*0Sstevel@tonic-gate static void
JNU_ThrowByName(JNIEnv * env,const char * name,const char * msg)54*0Sstevel@tonic-gate JNU_ThrowByName(JNIEnv *env, const char *name, const char *msg)
55*0Sstevel@tonic-gate {
56*0Sstevel@tonic-gate jclass class = (*env)->FindClass(env, name);
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate /*
59*0Sstevel@tonic-gate * If class is NULL FindClass() encountered a problem locating the
60*0Sstevel@tonic-gate * desired class and has already called ThrowNew() with an
61*0Sstevel@tonic-gate * exception.
62*0Sstevel@tonic-gate */
63*0Sstevel@tonic-gate if (class == NULL) {
64*0Sstevel@tonic-gate return;
65*0Sstevel@tonic-gate }
66*0Sstevel@tonic-gate
67*0Sstevel@tonic-gate (*env)->ThrowNew(env, class, msg);
68*0Sstevel@tonic-gate (*env)->DeleteLocalRef(env, class);
69*0Sstevel@tonic-gate }
70*0Sstevel@tonic-gate
71*0Sstevel@tonic-gate /*
72*0Sstevel@tonic-gate * Convert a Java String into a native set of characters using the
73*0Sstevel@tonic-gate * method String.getBytes(). This will ensure that the appropriate
74*0Sstevel@tonic-gate * character set encoding will be used. This is necessary if the
75*0Sstevel@tonic-gate * Java String uses unicode characters that cannot be easily
76*0Sstevel@tonic-gate * encoded into native chars.
77*0Sstevel@tonic-gate *
78*0Sstevel@tonic-gate * The buffer returned must be released by using free() once it is
79*0Sstevel@tonic-gate * finished with.
80*0Sstevel@tonic-gate *
81*0Sstevel@tonic-gate * This function returns NULL if an exception has been thrown during its
82*0Sstevel@tonic-gate * execution.
83*0Sstevel@tonic-gate */
84*0Sstevel@tonic-gate static char
JNU_GetStringNativeChars(JNIEnv * env,jstring jstr)85*0Sstevel@tonic-gate *JNU_GetStringNativeChars(JNIEnv *env, jstring jstr)
86*0Sstevel@tonic-gate {
87*0Sstevel@tonic-gate jclass class;
88*0Sstevel@tonic-gate jmethodID method;
89*0Sstevel@tonic-gate jint len;
90*0Sstevel@tonic-gate jbyteArray bytes = NULL;
91*0Sstevel@tonic-gate char *result = NULL;
92*0Sstevel@tonic-gate
93*0Sstevel@tonic-gate /*
94*0Sstevel@tonic-gate * Need a local reference for (1) FindClass(), (2) the bytes and
95*0Sstevel@tonic-gate * (3) the FindClass() in ThrowByName() if all goes wrong.
96*0Sstevel@tonic-gate */
97*0Sstevel@tonic-gate if ((*env)->EnsureLocalCapacity(env, 3) < 0) {
98*0Sstevel@tonic-gate JNU_ThrowByName(
99*0Sstevel@tonic-gate env,
100*0Sstevel@tonic-gate CLASS_JAVA_LANG_OUTOFMEMORYERROR,
101*0Sstevel@tonic-gate NULL);
102*0Sstevel@tonic-gate
103*0Sstevel@tonic-gate return (NULL);
104*0Sstevel@tonic-gate }
105*0Sstevel@tonic-gate
106*0Sstevel@tonic-gate class = (*env)->FindClass(env, CLASS_JAVA_LANG_STRING);
107*0Sstevel@tonic-gate
108*0Sstevel@tonic-gate /*
109*0Sstevel@tonic-gate * If class is NULL FindClass() encountered a problem locating the
110*0Sstevel@tonic-gate * desired class and has already called ThrowNew() with an
111*0Sstevel@tonic-gate * exception.
112*0Sstevel@tonic-gate */
113*0Sstevel@tonic-gate if (class == NULL) {
114*0Sstevel@tonic-gate return (NULL);
115*0Sstevel@tonic-gate }
116*0Sstevel@tonic-gate
117*0Sstevel@tonic-gate method = (*env)->GetMethodID(
118*0Sstevel@tonic-gate env,
119*0Sstevel@tonic-gate class,
120*0Sstevel@tonic-gate METHOD_GETBYTES,
121*0Sstevel@tonic-gate SIG_JAVA_LANG_STRING_GETBYTES);
122*0Sstevel@tonic-gate
123*0Sstevel@tonic-gate /*
124*0Sstevel@tonic-gate * If method is NULL GetMethodID() encountered a problem
125*0Sstevel@tonic-gate * locating the desired method and has already called
126*0Sstevel@tonic-gate * ThrowNew() with an exception.
127*0Sstevel@tonic-gate */
128*0Sstevel@tonic-gate if (method != NULL) {
129*0Sstevel@tonic-gate /*
130*0Sstevel@tonic-gate * Call String.getBytes(), creating our temporary
131*0Sstevel@tonic-gate * byte array
132*0Sstevel@tonic-gate */
133*0Sstevel@tonic-gate bytes = (*env)->CallObjectMethod(env, jstr, method);
134*0Sstevel@tonic-gate
135*0Sstevel@tonic-gate /* See if CallObjectMethod() threw an exception */
136*0Sstevel@tonic-gate if ((*env)->ExceptionCheck(env) == JNI_FALSE) {
137*0Sstevel@tonic-gate
138*0Sstevel@tonic-gate len = (*env)->GetArrayLength(env, bytes);
139*0Sstevel@tonic-gate
140*0Sstevel@tonic-gate /*
141*0Sstevel@tonic-gate * Allocate a buffer for the native characters,
142*0Sstevel@tonic-gate * need an extra char for string terminator.
143*0Sstevel@tonic-gate * Note: calloc will provide the terminating
144*0Sstevel@tonic-gate * '\0' for us.
145*0Sstevel@tonic-gate */
146*0Sstevel@tonic-gate result = (char *)calloc(len + 1, sizeof (char));
147*0Sstevel@tonic-gate
148*0Sstevel@tonic-gate /*
149*0Sstevel@tonic-gate * If allocation failed assume we are out of
150*0Sstevel@tonic-gate * memory
151*0Sstevel@tonic-gate */
152*0Sstevel@tonic-gate if (result == NULL) {
153*0Sstevel@tonic-gate JNU_ThrowByName(
154*0Sstevel@tonic-gate env,
155*0Sstevel@tonic-gate CLASS_JAVA_LANG_OUTOFMEMORYERROR,
156*0Sstevel@tonic-gate NULL);
157*0Sstevel@tonic-gate } else {
158*0Sstevel@tonic-gate /*
159*0Sstevel@tonic-gate * Copy the encoded bytes into the
160*0Sstevel@tonic-gate * native string buffer
161*0Sstevel@tonic-gate */
162*0Sstevel@tonic-gate (*env)->GetByteArrayRegion(
163*0Sstevel@tonic-gate env,
164*0Sstevel@tonic-gate bytes,
165*0Sstevel@tonic-gate 0,
166*0Sstevel@tonic-gate len,
167*0Sstevel@tonic-gate (jbyte *)result);
168*0Sstevel@tonic-gate }
169*0Sstevel@tonic-gate }
170*0Sstevel@tonic-gate
171*0Sstevel@tonic-gate if (bytes != NULL) {
172*0Sstevel@tonic-gate (*env)->DeleteLocalRef(env, bytes);
173*0Sstevel@tonic-gate }
174*0Sstevel@tonic-gate }
175*0Sstevel@tonic-gate
176*0Sstevel@tonic-gate /* Clean up by deleting the local references */
177*0Sstevel@tonic-gate (*env)->DeleteLocalRef(env, class);
178*0Sstevel@tonic-gate
179*0Sstevel@tonic-gate return (result);
180*0Sstevel@tonic-gate }
181*0Sstevel@tonic-gate
182*0Sstevel@tonic-gate /*
183*0Sstevel@tonic-gate * Class: com_sun_slp_Syslog
184*0Sstevel@tonic-gate * Method: syslog
185*0Sstevel@tonic-gate * Signature: (ILjava/lang/String;)V
186*0Sstevel@tonic-gate */
187*0Sstevel@tonic-gate /* ARGSUSED */
188*0Sstevel@tonic-gate JNIEXPORT
Java_com_sun_slp_Syslog_syslog(JNIEnv * env,jobject obj,jint priority,jstring jmsg)189*0Sstevel@tonic-gate void JNICALL Java_com_sun_slp_Syslog_syslog(JNIEnv *env,
190*0Sstevel@tonic-gate jobject obj,
191*0Sstevel@tonic-gate jint priority,
192*0Sstevel@tonic-gate jstring jmsg) {
193*0Sstevel@tonic-gate
194*0Sstevel@tonic-gate char *msg = JNU_GetStringNativeChars(env, jmsg);
195*0Sstevel@tonic-gate
196*0Sstevel@tonic-gate /*
197*0Sstevel@tonic-gate * Check to see if the String conversion was successful,
198*0Sstevel@tonic-gate * if it wasn't an exception will have already been thrown.
199*0Sstevel@tonic-gate */
200*0Sstevel@tonic-gate if (msg != NULL) {
201*0Sstevel@tonic-gate openlog("slpd", LOG_PID, LOG_DAEMON);
202*0Sstevel@tonic-gate syslog(priority, "%s", msg);
203*0Sstevel@tonic-gate closelog();
204*0Sstevel@tonic-gate
205*0Sstevel@tonic-gate free(msg);
206*0Sstevel@tonic-gate }
207*0Sstevel@tonic-gate }
208