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jSerialComm
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Try to use HOME directory as tmp directory if tmp is noexec

This commit is contained in:
Will Hedgecock 2022-01-10 10:23:04 -06:00
parent 1de0dc509f
commit 3c17081439
1 changed files with 90 additions and 67 deletions
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157
src/main/java/com/fazecast/jSerialComm/SerialPort.java
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@ -59,15 +59,21 @@ public final class SerialPort
// Determine the temporary file directory for Java and remove any previous versions of this library
String OS = System.getProperty("os.name").toLowerCase(), arch = System.getProperty("os.arch").toLowerCase();
String libraryPath = "", fileName = "", backupLibraryPath = "";
String tempFileDirectory = System.getProperty("java.io.tmpdir");
String tempFileDirectory = System.getProperty("java.io.tmpdir"), userHomeDirectory = System.getProperty("user.home");
if (!tempFileDirectory.endsWith("\\") && !tempFileDirectory.endsWith("/"))
tempFileDirectory += "/";
if (!userHomeDirectory.endsWith("\\") && !userHomeDirectory.endsWith("/"))
userHomeDirectory += "/";
// Make sure to use appId to separate tmpdir directories if library is used by multiple modules so they don't erase each others' folders
tempFileDirectory += "jSerialComm/" + System.getProperty(tmpdirAppIdProperty, "");
userHomeDirectory += ".jSerialComm/" + System.getProperty(tmpdirAppIdProperty, "");
if (!tempFileDirectory.endsWith("\\") && !tempFileDirectory.endsWith("/"))
tempFileDirectory += "/";
if (!userHomeDirectory.endsWith("\\") && !userHomeDirectory.endsWith("/"))
userHomeDirectory += "/";
deleteDirectory(new File(tempFileDirectory));
deleteDirectory(new File(userHomeDirectory));
// Determine Operating System and architecture
if (System.getProperty("java.vm.vendor").toLowerCase().contains("android"))
@ -110,7 +116,10 @@ public final class SerialPort
backupLibraryPath = "Windows/x86";
}
else
{
libraryPath = "Windows/x86";
backupLibraryPath = "Windows/x86_64";
}
isWindows = true;
fileName = "jSerialComm.dll";
}
@ -280,79 +289,93 @@ public final class SerialPort
// Copy platform-specific binary to a temporary location
try
{
// Get path of native library and copy file to working directory with open permissions
File tempNativeLibrary = new File(tempFileDirectory + (new Date()).getTime() + "-" + fileName);
File tempBackupNativeLibrary = new File(tempFileDirectory + (new Date()).getTime() + "-backup-" + fileName);
tempNativeLibrary.getParentFile().mkdirs();
tempNativeLibrary.getParentFile().setReadable(true, false);
tempNativeLibrary.getParentFile().setWritable(true, false);
tempNativeLibrary.getParentFile().setExecutable(true, false);
tempBackupNativeLibrary.deleteOnExit();
tempNativeLibrary.deleteOnExit();
// Load the native jSerialComm library
InputStream fileContents = SerialPort.class.getResourceAsStream("/" + libraryPath + "/" + fileName);
InputStream backupFileContents = backupLibraryPath.isEmpty() ? null : SerialPort.class.getResourceAsStream("/" + backupLibraryPath + "/" + fileName);
if ((fileContents == null) && isAndroid)
boolean libraryLoaded = false;
for (int attempt = 0; !libraryLoaded && (attempt < 2); ++attempt)
{
libraryPath = libraryPath.replace("Android/", "lib/");
fileContents = SerialPort.class.getResourceAsStream("/" + libraryPath + "/" + fileName);
}
if (fileContents == null)
{
System.err.println("Could not locate or access the native jSerialComm shared library.");
System.err.println("If you are using multiple projects with interdependencies, you may need to fix your build settings to ensure that library resources are copied properly.");
}
else
{
// Copy the native library to the system temp directory
FileOutputStream destinationFileContents = new FileOutputStream(tempNativeLibrary);
byte transferBuffer[] = new byte[4096];
int numBytesRead;
while ((numBytesRead = fileContents.read(transferBuffer)) > 0)
destinationFileContents.write(transferBuffer, 0, numBytesRead);
destinationFileContents.close();
fileContents.close();
tempNativeLibrary.setReadable(true, false);
tempNativeLibrary.setWritable(true, false);
tempNativeLibrary.setExecutable(true, false);
// Load primary native library
boolean libraryLoaded = true;
try { System.load(tempNativeLibrary.getAbsolutePath()); }
catch (UnsatisfiedLinkError e)
// Get path of native library and copy file to working directory with open permissions
File tempNativeLibrary = new File(((attempt == 0) ? tempFileDirectory : userHomeDirectory) + (new Date()).getTime() + "-" + fileName);
File tempBackupNativeLibrary = new File(((attempt == 0) ? tempFileDirectory : userHomeDirectory) + (new Date()).getTime() + "-backup-" + fileName);
if (tempNativeLibrary.getParentFile().mkdirs())
{
libraryLoaded = false;
if (backupFileContents == null)
throw new UnsatisfiedLinkError("Cannot load native library " + tempNativeLibrary.getAbsolutePath() + " with expected architecture: " + libraryPath);
tempNativeLibrary.getParentFile().setReadable(true, false);
tempNativeLibrary.getParentFile().setWritable(true, false);
tempNativeLibrary.getParentFile().setExecutable(true, false);
tempBackupNativeLibrary.deleteOnExit();
tempNativeLibrary.deleteOnExit();
}
// Load backup native library upon error if available
if (backupFileContents != null)
else
continue;
// Load the native jSerialComm library
InputStream fileContents = SerialPort.class.getResourceAsStream("/" + libraryPath + "/" + fileName);
InputStream backupFileContents = backupLibraryPath.isEmpty() ? null : SerialPort.class.getResourceAsStream("/" + backupLibraryPath + "/" + fileName);
if ((fileContents == null) && isAndroid)
{
if (!libraryLoaded)
libraryPath = libraryPath.replace("Android/", "lib/");
fileContents = SerialPort.class.getResourceAsStream("/" + libraryPath + "/" + fileName);
}
if (fileContents == null)
{
System.err.println("Could not locate or access the native jSerialComm shared library.");
System.err.println("If you are using multiple projects with interdependencies, you may need to fix your build settings to ensure that library resources are copied properly.");
}
else
{
// Copy the native library to the system temp directory
FileOutputStream destinationFileContents = new FileOutputStream(tempNativeLibrary);
byte transferBuffer[] = new byte[4096];
int numBytesRead;
while ((numBytesRead = fileContents.read(transferBuffer)) > 0)
destinationFileContents.write(transferBuffer, 0, numBytesRead);
destinationFileContents.close();
fileContents.close();
tempNativeLibrary.setReadable(false, false);
tempNativeLibrary.setWritable(false, false);
tempNativeLibrary.setExecutable(true, false);
// Load primary native library
libraryLoaded = true;
try { System.load(tempNativeLibrary.getAbsolutePath()); }
catch (UnsatisfiedLinkError e)
{
// Copy the native library to the system temp directory
destinationFileContents = new FileOutputStream(tempBackupNativeLibrary);
while ((numBytesRead = backupFileContents.read(transferBuffer)) > 0)
destinationFileContents.write(transferBuffer, 0, numBytesRead);
destinationFileContents.close();
backupFileContents.close();
tempBackupNativeLibrary.setReadable(true, false);
tempBackupNativeLibrary.setWritable(true, false);
tempBackupNativeLibrary.setExecutable(true, false);
// Load backup native library
try { System.load(tempBackupNativeLibrary.getAbsolutePath()); }
catch (UnsatisfiedLinkError e) { throw new UnsatisfiedLinkError("Cannot load native libraries " + tempNativeLibrary.getAbsolutePath() + " or " + tempBackupNativeLibrary.getAbsolutePath() + " with expected architectures: " + libraryPath + " or " + backupLibraryPath); }
libraryLoaded = false;
if ((backupFileContents == null) && (attempt > 0))
throw new UnsatisfiedLinkError("Cannot load native library " + tempNativeLibrary.getAbsolutePath() + " with expected architecture: " + libraryPath);
}
else
backupFileContents.close();
// Load backup native library upon error if available
if (backupFileContents != null)
{
if (!libraryLoaded)
{
// Copy the native library to the system temp directory
destinationFileContents = new FileOutputStream(tempBackupNativeLibrary);
while ((numBytesRead = backupFileContents.read(transferBuffer)) > 0)
destinationFileContents.write(transferBuffer, 0, numBytesRead);
destinationFileContents.close();
backupFileContents.close();
tempBackupNativeLibrary.setReadable(false, false);
tempBackupNativeLibrary.setWritable(false, false);
tempBackupNativeLibrary.setExecutable(true, false);
// Load backup native library
libraryLoaded = true;
try { System.load(tempBackupNativeLibrary.getAbsolutePath()); }
catch (UnsatisfiedLinkError e)
{
libraryLoaded = false;
if (attempt > 0)
throw new UnsatisfiedLinkError("Cannot load native libraries " + tempNativeLibrary.getAbsolutePath() + " or " + tempBackupNativeLibrary.getAbsolutePath() + " with expected architectures: " + libraryPath + " or " + backupLibraryPath);
}
}
else
backupFileContents.close();
}
// Initialize native library
if (libraryLoaded)
initializeLibrary();
}
// Initialize native library
if (libraryLoaded)
initializeLibrary();
}
}
catch (Exception e) { e.printStackTrace(); }