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POExec vs ExecWait vs ExecShell vs nsExec::Exec vs nsExec::ExecToLog vs nsExec::ExecToStack vs ExecDos vs ExeCmd
 

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  1. POExec vs ExecWait vs ExecShell vs nsExec::Exec vs nsExec::ExecToLog vs nsExec::ExecToStack vs ExecDos vs ExeCmd
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    <p>Can I know what are the differences between each <code>Exec</code>, <code>ExecWait</code>, <code>ExecShell</code>, <code>nsExec::Exec</code>, <code>nsExec::ExecToLog,</code> <code>nsExec::ExecToStack</code>, <code>ExecDos</code> and <code>ExecCmd</code>, as in when to use which?</p> <p>I 've posted the various execute calls I know. I am trying to make a comprehensive list, so that it helps future visitors..</p> <ol> <li><p><code>Exec</code>: Plainly execute the called string, be it some application, console or file.</p></li> <li><p><code>ExecWait</code>: Executes like <code>Exec</code> but waits till the process exits.</p></li> <li><p><code>ExecShell</code>: <strong>What is it for?</strong></p></li> <li><p><code>nsExec::Exec</code>: Just like <code>Exec</code> or <code>ExecWait</code> but only for command prompt and that too without opening the console window. I am unsure if it waits for process to exit. <strong>Does <code>nsExec::Exec</code> wait for child process to exit?</strong></p></li> <li><p><code>nsExec::ExecToLog</code>: <code>The documentation says ExecToLog</code> is similar to plain <code>nsExec</code> but it outputs to log window. <strong>What does that mean, what is a log window?</strong></p></li> <li><p><code>nsExec::ExecToStack</code>: The documentation says <code>ExecToStack</code> is similar to plain <code>nsExec</code> but it pushes output to stack. I get that.</p></li> <li><p><code>ExecDos</code>: Same as <code>nsExec::ExecToStack</code> but it additionally (<strong>Is it not</strong>?)</p> <p>a. takes string parameter that serves as stdin for running application.</p> <p>b. works in both sync/async mode.</p> <p>c. it works out of section - for .onInit check outs.</p></li> <li><p><code>ExecCmd</code>: Same as <code>ExecDos</code> but it doesn't require these</p> <pre><code>ExpandEnvStrings $3 %COMSPEC% ExecDos::exec /C </code></pre> <p>parts. <strong>Am I correct?</strong></p></li> </ol>
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    1. COYou may include [Timeout::ExecTimeout](http://nsis.sourceforge.net/ExecTimeout_plug-in) too, for those who need to kill child process if it takes too long to complete.
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    2. CO@FranciscoR Feel free to edit the question and add it (along with its purpose). I'm not so knowledgeable about the one you mentioned.
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