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NAME
javald - wrapper creator for java application
SYNOPSIS
/usr/java/bin/javald [ -C path ] [ -H dir ]
[ -j option-list ] [ -o outfile ] [ -R path ] classname
DESCRIPTION
The javald command creates a convenient wrapper that cap-
tures the necessary environment needed to run a Java appli-
cation specified by classname. If the -o option is provided,
the resulting executable wrapper is outfile. If the -o
option is not specified, then the default used is the name
of the class.
This wrapper sets the necessary environment variables needed
by java(1) before it executes the class specified by
classname.
If the -H flag is specified, the wrapper sets JAVA_HOME to
the path specified by the option. If -H option is not speci-
fied, the wrapper attempts to use the user's environment
JAVA_HOME if set; otherwise it assumes a default JAVA_HOME
of /usr/java.
Paths specified as arguments to the -C and -R flags of the
javald command are treated differently.
The path arguments, which may include shell variables, are
subject to deferred evaluation that is, they are evaluated
when the wrapper is executed.
Relative pathnames are treated as pathnames relative to the
directory where the wrapper is installed, not the current
working directory.
This behavior is designed to support applications that con-
sist of several classes in a directory hierarchy rather than
a single executable. Using relative pathnames allows this
directory hierarchy (thus the application) to be more easily
moved to different filesystems.
The default CLASSPATH created by the wrapper if no -C
options are used is equivalent to specifying -C.
The default interpreter executed by the wrapper is
$JAVA_HOME/bin/java.
OPTIONS
The following options are supported:
-C path Adds path, to the run-time CLASSPATH. This
specifies where java(1) will search for Java
classes. See DESCRIPTION for a discussion of
the run-time evaluation of these pathnames.
The -C option can be repeated, such as
example% javald -C /usr/class -C
/optjava...
-H dir Sets JAVA_HOME to dir.
-j option-list Allows the set of options to be passed to the
invocation of java(1) to be set. If there
are multiple options, they should be quoted
to ensure that they are passed into the
resulting wrapper.
-o outfile Places the wrapper in outfile.
-R path Adds path to the run-time LD_LIBRARY_PATH.
This specifies where java(1) will search for
native methods. See DESCRIPTION for a dis-
cussion of the run-time evaluation of these
pathnames.
EXAMPLES
Example 1:
A wrapper appl is created in /opt/acme/bin
example% javald -o /opt/acme/bin/appl -C
/opt/acme/classes acmeApp
that contains the following environment variables:
JAVA_HOME=${JAVA_HOME:-/usr/java}
CLASSPATH=/opt/acme/classes
When appl is run, java(1) will attempt to invoke the main()
method of the acmeApp class. The java(1) interpreter will
search for acmeApp in /opt/acme/classes, then in the default
system class directory, ${JAVA_HOME}/lib/classes.zip.
Example 2:
The following command creates a script called myapp:
example% javald -o myapp -j '-noverify -ms8m' myapp
which contains an invocation of the java(1) interpreter that
looks like:
example% exec {JAVA_HOME}/bin/java -noverify -ms8m
myapp
ENVIRONMENT VARIABLES
JAVA_HOME Use the JAVA_HOME environment variable to
specify the java (1) runtime.
FILES
/usr/java/lib/classes.zip
Archive of Java runtime classes. Please
note that it does not need to be
unzipped.
ATTRIBUTES
See attributes(5) for a description of the following attri-
butes:
__________________________________
| ATTRIBUTE TYPE| ATTRIBUTE VALUE|
|_______________|__________________|_
| Availability | SUNWjvrt |
|_______________|_________________|
SEE ALSO
java(1)
The Java Tutorial @
http://java.sun.com:80/docs/books/tutorial/index.html
For information on related topics, use the search link @
http://java.sun.com/
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