植根手機上執行的進程與參數無效

Question

假設這樣的：

Runtime runtime = Runtime.getRuntime(); 
Process process = runtime.exec(SU); 
DataOutputStream processStream = new DataOutputStream(process.getOutputStream()); 
processStream.writeChars("cat /qwerty"); 
processStream.writeChars(EXIT); 
processStream.flush(); 

int status = process.waitFor(); 

Log.d("EXIT STATUS", String.valueOf(status)); 

process.waitFor();導致當前線程等待永遠。我想問題在於那個無效的命令（我故意這麼做）。但我該如何處理這種情況呢？

Busybox的1.17.1

Answer 1

當您發送使用writeChars命令，它們都在外殼會在同一行，從來沒有被實際執行，我認爲。你需要放入換行符來執行shell。試試這個：

Runtime runtime = Runtime.getRuntime(); 
Process process = runtime.exec(SU); 
DataOutputStream processStream = new DataOutputStream(process.getOutputStream()); 
processStream.writeChars("cat /qwerty\n"); 
processStream.writeChars("exit \n"); 
processStream.flush(); 

int status = process.waitFor(); 

Log.d("EXIT STATUS", String.valueOf(status));