extcheck

 

---

 extcheck(1)                                           extcheck(1)
 
 
 
NAME
        extcheck - jar conflict detection utility
 
SYNOPSIS
        extcheck [ -verbose ] targetfile.jar
 
DESCRIPTION
        The extcheck utility checks a specified jar file for title
        and version conflicts with any extensions installed in the
        JDKtm  software.   Before installing an extension, you can
        use this utility to see if the same or a more recent  ver­
        sion of the extension is already installed.
 
        The  extcheck utility compares the Specification-title and
        Specification-version headers in the manifest  of  target­
        file.jar file against the corresponding headers in all Jar
        files currently  installed  in  the  extension  directory.
        (The  extension  directory is jre/lib/ext by default.) The
        extcheck utility compares version numbers in the same  way
        as the method java.lang.Package.isCompatibleWith.
 
OPTIONS
        The following option is supported:
 
        -verbose       Lists  jar files in the extension directory
                       as they are checked.   Additionally,  mani­
                       fest  attributes of the target jar file and
                       any  conflicting   jar   files   are   also
                       reported.
 
 EXIT STATUS
        The following exit values are returned:
 
        0              No conflict is detected.
 
        non-zero       If  the manifest of any of the jar files in
                       the extensions directory has the same Spec­
                       ification-title  and  the  same  or a newer
                       Specification-version number, or if target­
                       file.jar  does  not have the Specification-
                       title or  Specification-version  attributes
                       in its manifest.
 
SEE ALSO
        jar(1)
 
 
 
                            13 June 2000               extcheck(1)

---