Red Hat Bugzilla – Bug 1169509
file: report full java version for 1.7 and 1.8 class files
Last modified: 2016-05-10 15:47:16 EDT
Description of problem: If you compile using Java SE 6, file will display: compiled Java class data, version 48.0 (Java 1.4) Note the "(Java 1.4)" at the end. If you compile with Java SE 7, file will display: compiled Java class data, version 51.0 Note the missing ("Java 1.7)" at the end. Version-Release number of selected component (if applicable): java-1.7.0-ibm-1.7.0.7.1-1jpp.1.el6_5.x86_64 How reproducible: Very Steps to Reproduce: 1. install java 2. complile java 3. run 'file' command against class files Actual results: No java version reported Expected results: Java verion to be reported as part of the output. Additional info:
(In reply to Nathan Galvin from comment #0) > Description of problem: > If you compile using Java SE 6, file will display: > compiled Java class data, version 48.0 (Java 1.4) > Note the "(Java 1.4)" at the end. > > If you compile with Java SE 7, file will display: > compiled Java class data, version 51.0 > Note the missing ("Java 1.7)" at the end. > > Version-Release number of selected component (if applicable): > java-1.7.0-ibm-1.7.0.7.1-1jpp.1.el6_5.x86_64 > > How reproducible: > Very > > Steps to Reproduce: > 1. install java > 2. complile java > 3. run 'file' command against class files Should read Steps to Reproduce: 1. install java 2. complile using java 3. run 'file' command against class files > > Actual results: > No java version reported > > Expected results: > Java verion to be reported as part of the output. > > Additional info:
This isn't java bug, but file bug. The solution is exactly what is described in the initial description of the attached support case. cafebabe magic file needs the following two rules: >>4 belong 0x0033 (Java 1.7) >>4 belong 0x0034 (Java 1.8) Their addition changes output form: $ file java{6,7,8}.class java6.class: compiled Java class data, version 50.0 (Java 1.6) java7.class: compiled Java class data, version 51.0 java8.class: compiled Java class data, version 52.0 to: $ file java{6,7,8}.class -m magic java6.class: compiled Java class data, version 50.0 (Java 1.6) java7.class: compiled Java class data, version 51.0 (Java 1.7) java8.class: compiled Java class data, version 52.0 (Java 1.8) The issue does not seem to be fixed upstream: https://github.com/file/file/blob/master/magic/Magdir/cafebabe I'm sure Jan can get this upstream rather easily.
Proposed upstream: http://bugs.gw.com/view.php?id=422
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2016-0760.html