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Posted to issues@commons.apache.org by "Ahmadin Badruddin (Jira)" <ji...@apache.org> on 2024/12/09 04:09:00 UTC

[jira] [Created] (COMPRESS-690) CpioArchiveEntry is missing getLinkName

Ahmadin Badruddin created COMPRESS-690:
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             Summary: CpioArchiveEntry is missing getLinkName
                 Key: COMPRESS-690
                 URL: https://issues.apache.org/jira/browse/COMPRESS-690
             Project: Commons Compress
          Issue Type: Bug
          Components: Archivers
    Affects Versions: 1.27.1
            Reporter: Ahmadin Badruddin


When trying to extract a cpio file that contains a symbolic link, there is a method to check if 
CpioArchiveEntry is a symbolic link (entry.isSymbolicLink()), but there is no entry.getLinkName. There is a getName, but we cannot create a symlink without the target link.
 
I'm {color:#FF0000}*hoping*{color} I can write a code to extract symlink from a cpio like below code snippets
{code:java}
public void extractCpioSymbolicLink(File archiveFile, File targetDirectory) throws IOException {
    try (CpioArchiveInputStream cpioInputStream = new CpioArchiveInputStream(new FileInputStream(archiveFile))) {
        CpioArchiveEntry entry;
        while ((entry = cpioInputStream.getNextEntry()) != null) {
            if (entry.isSymbolicLink()) {
                String linkTarget = entry.getLinkName(); // Get the link target
                File linkFile = new File(targetDirectory, entry.getName()); 
                // Create the symbolic link using the linkTarget on the target system
                Files.createSymbolicLink(linkFile.toPath(), Paths.get(linkTarget)); 
            } else {
                // Handle other file types (regular files, directories) as needed
            }
        }
    }
} {code}



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