c++ - 使用 linux echo 命令的变量内容列表 Run with qtProcess

Question

我想使用 GUI 执行“echo”命令，该命令用于在 linux 终端中显示变量内容。我用 qProcess 写了这个，但它只打印了 $SHELL 作为输出。

QString cmd = "echo $SHELL";
QProcess *process = new QProcess;
process->start(cmd);
process->waitForBytesWritten();
process->waitForFinished();
qDebug() << process->readAll();`

Qt代码输出:$SHELL...................................................

终端命令:[intern2atlas SETUP]$ echo $SHELL

输出:/bin/tcsh

Answer 1

这是一个代码示例。请试试这个:

   env.insert("TERM", "xterm");
    processo.setProcessEnvironment(env);

    //comando 1 - limpar a pasta
    comando = "echo";
    args.clear();
    args<<"$TERM";
    fullCommand = comando;
    for(int i = 0; i < args.count(); i++)
        fullCommand += " " + args.at(i);
    processo.start(comando,args,QIODevice::ReadOnly);
    processo.waitForFinished();
    stdOut = processo.readAllStandardOutput();
    stdError = processo.readAllStandardError();
    ui->commandTextEdit->append(fullCommand);
    ui->stdOutTextEdit->append(stdOut);
    ui->stdErrorTextEdit->append(stdError);

引用:http://www.qtcentre.org/threads/58131-Execute-system-command-from-QProcess