java applications and stdin - users

21 Oct 2019


      Hello Genodians
I'm trying to use the stdin file descriptor in a java application to
pass data through a terminal to the application.
When the application tries to read from the file descriptor, I get the
following error message:
[init -> init -> java] Error: no plugin found for read(0)
If is start a libc component instead of java, there is no error message
and the component can read from stdio.
In the <start> node of the java application I have the following
<config> node:
<config ld_verbose="no">
    <arg value="/bin/java" />
    <!--
    <arg value="-XX:+NeverActAsServerClassMachine"/>
    <arg value="-XX:+UnlockDiagnosticVMOptions"/>
    <arg value="-XX:-ImplicitNullChecks"/>
    <arg value="-XX:+CITime"/>
    -->
    <arg value="-Xint"/>
    <arg value="-jar"/>
    <arg value="app.jar"/>
    <libc stdin="/dev/terminal" stdout="/dev/terminal" stderr="/dev/log"
rtc="/dev/rtc"/>
    <vfs rtc="/dev/rtc">
    	<dir name="dev">
    		<log/><null/><inline name="rtc">2000-01-01 00:00</inline>
    		<terminal label="terminal"/>
    	</dir>
    	<dir name="bin">
    		<rom name="java"/>
    	</dir>
    	<dir name="lib">
    		<rom name="java.lib.so"/>
    		<inline name="jvm.cfg">-server KNOWN
-client IGNORE
    		</inline>
    		<dir name="server">
    			<rom name="jvm.lib.so"/>
    		</dir>
    	</dir>
    	<dir name="modules">
    		<tar name="classes.tar"/>
    	</dir>
    	<tar name="app.tar"/>
    	<rom name="zip.lib.so"/>
    	<rom name="nio.lib.so"/>
    	<rom name="net.lib.so"/>
    </vfs>
</config>
Can anybody help me getting this to work?
Best regards, Pirmin