[英]Executing the shell command in QProcess.Piping the input
I am trying to pipe the commands and execute it, but I am not able to figure how to pipe it. 我试图通过管道传递命令并执行它,但是我无法弄清楚如何通过管道传递它。 I am trying to copy multiple files at once using the shell command
我正在尝试使用shell命令一次复制多个文件
for %I in (source) do copy %I (destination)
对于(来源)中的%I,请复制%I(目标)
QString files = "for %I in (source) do copy %I (destination)"
QProcess copy ;
copy.start(files);
I have to implement the piping to do that. 我必须实现管道来做到这一点。 for Eg.
例如
QProcess sh;
sh.start("sh", QStringList() << "-c" << "ifconfig | grep inet");
sh.waitForFinished();
QByteArray output = sh.readAll();
sh.close();
How can I implement piping for my copy process? 如何为复制过程实现管道?
Try this example: 试试这个例子:
QProcess sh;
sh.start( "sh", { "-c", "ifconfig | grep inet" } );
if ( !sh.waitForFinished( -1 ) )
{
qDebug() << "Error:" << sh.readAllStandardError();
return -1;
}
const auto output = sh.readAllStandardOutput();
// ...
waitForFinished()
should be called in blocking mode and it must be checked if it was successful or not. 应该在阻塞模式下调用
waitForFinished()
,并且必须检查它是否成功。
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