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Air_Quality_Sensor_PPD42
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Testing out the PPD42 Air Quality Sensor, with an MSP430 Launchpad and graphing the data with GNUplot.
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Air_Quality_Sensor_PPD42/resources/MSP-EXP430G2 Software Examples/Source/OutOfBox_MSP-EXP430G2/Processing Library Sources/rxtx-2.1-7r2/RMISecurityManager.html

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  1. <html>
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  96. 

  97. 

  98. <table cellspacing=0 cellpadding=0 width="100%">
  99. <tr valign=top><td><table cellspacing=0 cellpadding=1>
  100. <tr><td align=left colspan=2>From Alejandro P. Revilla Tue Dec  7 08:47:36 1999</td></tr>
  101. <tr><td align=right valign=top nowrap><b>X-Apparently-To:</b></td><td> taj@www.linux.org.uk via mdd301.mail.yahoo.com</td></tr>
  102. <tr><td align=right valign=top nowrap><b>Received:</b></td><td> from csd.cs.com.uy (HELO ms.cs.com.uy) (206.99.51.136)
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  106. 	for &lt;taj@www.linux.org.uk&gt;; Tue, 7 Dec 1999 13:50:04 -0300</td></tr>
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  108. 	by apr.cs.com.uy (8.8.5/8.8.5) id NAA05191
  109. 	for taj@www.linux.org.uk; Tue, 7 Dec 1999 13:47:37 -0300</td></tr>
  110. <tr><td align=right valign=top nowrap><b>Date:</b></td><td> Tue, 7 Dec 1999 13:47:36 -0300</td></tr>
  111. <tr><td align=right valign=top nowrap><b>From:</b></td><td> &#34;Alejandro P. Revilla&#34; &lt;apr@cs.com.uy&gt;<small>&nbsp;&nbsp;|&nbsp;<b><a href="/ym/BlockSender?NBR=1&NE=apr@cs.com.uy&box=Inbox&MsgId=7460_2210756_110261_949_9771_0&inc=&num=&Search=&YY=82723&order=down&sort=date&pos=0">Block address</a></b></small></td></tr>
  112. <tr><td align=right valign=top nowrap><b>To:</b></td><td> Trent Jarvi &lt;taj@www.linux.org.uk&gt;</td></tr>
  113. <tr><td align=right valign=top nowrap><b>Subject:</b></td><td> Forward of JINI-USERS thread</td></tr>
  114. <tr><td align=right valign=top nowrap><b>Message-ID:</b></td><td> &lt;19991207134736.M24226@cs.com.uy&gt;</td></tr>
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  138. <br>
  139. 

  140. 

  141. 

  142. <pre><font size=-1>Hi Trent,
  143. 

  144.    There's a problem accesing CommAPI after setting an
  145. RMISecurityManager(). I did not have time to find out where
  146. the problem is, just went thru a simple workaround. Now I
  147. see somebody else on JINI-USERS reporting the same problem
  148. and it happens not to appear on Windoze machines.
  149. 

  150. Just for your information and for you to be aware of it
  151. I am attaching two messages (original message and my response)
  152. to JINI-USERS.
  153. 

  154. I personally think the problem may well be at comm.jar
  155. solaris implementation.
  156. 

  157. Best regards
  158. --Alejandro
  159. </font></pre>
  160. 

  161. 

  162. <HR size=1> <center><font size=-1><b>Attachment: Forwarded Message</b></font></center><br>
  163. 

  164. 

  165. 

  166. <table cellspacing=0 cellpadding=1>
  167. <tr><td align=right valign=top nowrap><b>Return-Path:</b></td><td> &lt;owner-jini-users@JAVA.SUN.COM&gt;</td></tr>
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  170. 	for &lt;apr@localhost&gt;; Sun, 5 Dec 1999 19:12:49 -0300</td></tr>
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  172. 	by localhost with POP3 (fetchmail-4.7.6)
  173. 	for apr@localhost (single-drop); Sun, 05 Dec 1999 19:12:49 -0300 (EST)</td></tr>
  174. <tr><td align=right valign=top nowrap><b>Received:</b></td><td> from cs.cs.com.uy (cs.cs.com.uy [206.99.51.130])
  175. 	by ms.cs.com.uy (8.9.1/8.9.1) with SMTP id TAA53622
  176. 	for &lt;apr@csd.cs.com.uy&gt;; Sun, 5 Dec 1999 19:14:30 -0300</td></tr>
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  183. 	by mail.java.sun.com (8.9.3+Sun/8.9.3) with ESMTP id OAA28872;
  184. 	Sun, 5 Dec 1999 14:07:56 -0800 (PST)</td></tr>
  185. <tr><td align=right valign=top nowrap><b>Received:</b></td><td> from JAVA.SUN.COM by JAVA.SUN.COM (LISTSERV-TCP/IP release 1.8d) with
  186.           spool id 2782139 for JINI-USERS@JAVA.SUN.COM; Sun, 5 Dec 1999
  187.           14:03:53 -0800</td></tr>
  188. <tr><td align=right valign=top nowrap><b>Received:</b></td><td> from catwalk.los-gatos.net ([207.214.112.33]) by mail.java.sun.com
  189.           (8.9.3+Sun/8.9.3) with ESMTP id OAA28480 for
  190.           &lt;jini-users@java.sun.com&gt;; Sun, 5 Dec 1999 14:03:51 -0800 (PST)</td></tr>
  191. <tr><td align=right valign=top nowrap><b>Received:</b></td><td> from catwalk.los-gatos.net (localhost [127.0.0.1]) by
  192.           catwalk.los-gatos.net (8.8.7/8.8.7) with SMTP id NAA07234 for
  193.           &lt;jini-users@java.sun.com&gt;; Sun, 5 Dec 1999 13:57:01 -0800</td></tr>
  194. <tr><td align=right valign=top nowrap><b>X-Mailer:</b></td><td> KMail [version 1.0.28]</td></tr>
  195. <tr><td align=right valign=top nowrap><b>Content-Type:</b></td><td> text/plain</td></tr>
  196. <tr><td align=right valign=top nowrap><b>References:</b></td><td> &lt;99120505155801.00629@catwalk.los-gatos.net&gt;</td></tr>
  197. <tr><td align=right valign=top nowrap><b>MIME-Version:</b></td><td> 1.0</td></tr>
  198. <tr><td align=right valign=top nowrap><b>Content-Transfer-Encoding:</b></td><td> 8bit</td></tr>
  199. <tr><td align=right valign=top nowrap><b>Approved-By:</b></td><td>  Doug Sutherland &lt;doug@LOS-GATOS.NET&gt;</td></tr>
  200. <tr><td align=right valign=top nowrap><b>Message-ID:</b></td><td>  &lt;99120513570007.00629@catwalk.los-gatos.net&gt;</td></tr>
  201. <tr><td align=right valign=top nowrap><b>Date:</b></td><td>         Sun, 5 Dec 1999 13:48:52 -0800</td></tr>
  202. <tr><td align=right valign=top nowrap><b>Reply-to:</b></td><td> doug@los-gatos.net</td></tr>
  203. <tr><td align=right valign=top nowrap><b>Sender:</b></td><td> &#34;A mailing list for discussing Sun&#39;s Jini (tm) Technology&#34;
  204.               &lt;JINI-USERS@JAVA.SUN.COM&gt;</td></tr>
  205. <tr><td align=right valign=top nowrap><b>From:</b></td><td> Doug Sutherland &lt;doug@los-gatos.net&gt;</td></tr>
  206. <tr><td align=right valign=top nowrap><b>Organization:</b></td><td> The Cats Net</td></tr>
  207. <tr><td align=right valign=top nowrap><b>Subject:</b></td><td>      Re: Fwd: RMI Security Manager prevents access to other classes?</td></tr>
  208. <tr><td align=right valign=top nowrap><b>To:</b></td><td> JINI-USERS@JAVA.SUN.COM</td></tr>
  209. <tr><td align=right valign=top nowrap><b>In-Reply-To:</b></td><td>  &lt;99120505155801.00629@catwalk.los-gatos.net&gt;</td></tr>
  210. </table>
  211. <br>
  212. 

  213. 

  214. 

  215. <pre><font size=-1>Hi,
  216. 

  217. Allow me to clarify this problem further. I am aware of the Java 2
  218. security policies, and I am starting both the server and client with
  219. the -Djava.security.policy=policy parameter, where policy contains
  220. the usual
  221. 

  222.    permission java.security.AllPermission
  223. 

  224. The code works fine on Windows with the win32com.dll driver for
  225. Javacomm API. But on Linux the same code fails when trying to load
  226. the RXTXCommDriver (native driver for javacomm on linux). Seems
  227. like it might be a bug in gnu.io.RXTXCommDriver, either that or
  228. RMISecurityManager is not behaving the same way on Linux.
  229. 

  230. Any Ideas?
  231. 

  232. Thanks,
  233. Doug
  234. 

  235. 

  236. &gt; Correction: I meant to say:
  237. &gt;
  238. &gt;  - if I comment out System.setSecurityManager(new
  239. RMISecurityManager())
  240. &gt;                                                   ^^^
  241. &gt;    the serial port access works fine. But with the RMI security
  242. manager
  243. &gt;    the loading of serial port drivers fails.
  244. &gt;
  245. &gt; Doug
  246. &gt;
  247. &gt;
  248. &gt;
  249. &gt; ----------  Forwarded Message  ----------
  250. &gt; Subject: RMI Security Manager prevents access to other classes?
  251. &gt; Date: Sun, 5 Dec 1999 04:49:54 -0800
  252. &gt; From: Doug Sutherland &lt;<a href="/ym/Compose?To=doug@los-gatos.net&YY=82723&order=down&sort=date&pos=0">doug@los-gatos.net</a>&gt;
  253. &gt;
  254. &gt;
  255. &gt; Hi There,
  256. &gt;
  257. &gt; I am working with JDK1.2 (blackdown) on Linux kernel 2.0.36 (Redhat
  258. 5.2).
  259. &gt; I have an RMI client application that connects to an RMI server,
  260. grabs
  261. &gt; some data, and sends it out the serial port to an LCD display using
  262. the
  263. &gt; Java commapi for Linux. I have a situation where:
  264. &gt;
  265. &gt;  - if I comment out System.setSecurityManager(new SecurityManager())
  266. &gt;    the serial port access works fine, I write out characters to the
  267. &gt;    display no problem. The program finds the serial ports using
  268. &gt;    getPortIdentifier and is able to open the serial port.
  269. &gt;
  270. &gt;  - if I put back in the RMI security manager, the application does
  271. &gt;    not find the serial ports, instead it throws an exception while
  272. &gt;    trying to load the serial drivers:
  273. &gt;
  274. &gt;      caught java.lang.IllegalArgumentException: name can't be null
  275. &gt;      while loading driver gnu.io.RXTXCommDriver
  276. &gt;
  277. &gt; It appears that the RMI security manager is somehow messing with the
  278. &gt; loading of the native serial port driver (RXTX for linux). I assume
  279. &gt; that this is a feature not a bug. What do I need to do to get the
  280. &gt; RMI security manager to allow access to other classes? In this case
  281. &gt; the serial driver consists of a native shared library:
  282. &gt;
  283. &gt;  /usr/local/java/jdk1.2/jre/lib/i386/libSerial.so
  284. &gt;
  285. &gt; And java classes that reside here:
  286. &gt;
  287. &gt;  /usr/local/java/jdk1.2/jre/lib/ext/jcl.jar
  288. &gt;  /usr/local/java/jdk1.2/jre/lib/ext/comm.jar
  289. &gt;
  290. &gt; Anyone have any ideas? Do you have commapi working in an app
  291. &gt; that also does RMI? Any tips would be appreciated.
  292. &gt;
  293. &gt; Thanks,
  294. &gt; Doug
  295. 

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  307. </font></pre>
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  354.               &lt;JINI-USERS@JAVA.SUN.COM&gt;</td></tr>
  355. <tr><td align=right valign=top nowrap><b>From:</b></td><td> &#34;Alejandro P. Revilla&#34; &lt;apr@CS.COM.UY&gt;</td></tr>
  356. <tr><td align=right valign=top nowrap><b>Subject:</b></td><td>      Re: Fwd: RMI Security Manager prevents access to other classes?</td></tr>
  357. <tr><td align=right valign=top nowrap><b>Comments:</b></td><td> To: Doug Sutherland &lt;doug@los-gatos.net&gt;</td></tr>
  358. <tr><td align=right valign=top nowrap><b>To:</b></td><td> JINI-USERS@JAVA.SUN.COM</td></tr>
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  360.               Sutherland on Sun, Dec 05, 1999 at 01:48:52PM -0800
  361. </td></tr>
  362. </table>
  363. <br>
  364. 

  365. 

  366. 

  367. <pre><font size=-1>&gt;
  368. &gt; The code works fine on Windows with the win32com.dll driver for
  369. &gt; Javacomm API. But on Linux the same code fails when trying to load
  370. &gt; the RXTXCommDriver (native driver for javacomm on linux). Seems
  371. &gt; like it might be a bug in gnu.io.RXTXCommDriver, either that or
  372. &gt; RMISecurityManager is not behaving the same way on Linux.
  373. &gt;
  374. &gt; Any Ideas?
  375. &gt;
  376. I've experienced that very same problem. My work around was
  377. to install RMISecurityManager _after_ fetching the desired
  378. CommPortIdentifier (and of course I can perform I/O on the ports
  379. after setting RMISecurityManager)
  380. 

  381. This is not necessary a problem with RXTXCommDriver,
  382. there are other components involved such as 'comm.jar'.
  383. 

  384. --Alejandro
  385. 

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  395. To participate in the community, please visit:
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