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POhow to set Windows file permissions in Qt/C++
 

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  1. POhow to set Windows file permissions in Qt/C++
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    <p>In my Qt 4.7.4 x64 C++ app I'm building in Qt Creator 2.5.0, I want to give full access to everyone for a file. I'm using <code>QFile::setPermissions</code>, which I believe works fine for Mac and Linux, but it doesn't work for Windows. According to <a href="https://stackoverflow.com/questions/5021645/qt-setpermissions-not-setting-permisions">Qt setPermissions not setting permisions</a>, I should use </p> <pre><code>SetNamedSecurityInfoA("C:\file.txt", SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, NULL, NULL, NULL, NULL); </code></pre> <p>But I don't know what to #include to make it work. I tried:</p> <pre><code>#ifdef Q_WS_WIN #include "Windows.h" #endif </code></pre> <p>based on what I found <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/aa379283(v=vs.85).aspx" rel="nofollow noreferrer">here</a>. But when I compile, I get <code>C3861: 'SetNamedSecurityInfo': identifier not found</code> (among some other new errors).</p> <p>When I mouse over my <code>#include "Windows.h"</code>, I get the tooltip: <code>C:\Program Files\Microsoft SDKs\Windows\v7.0\include\Windows.h</code>, and I can press F2 and jump to that file. We have other files in our project that include that same Windows.h, and they compile fine.</p> <p>How do I set file permissions on Windows for everyone to read/write? If SetNamedSecurityInfo is what I want (I guess SetNamedSecurityInfoW in my case since my users may be running OS's in any language), what do I #include to be able to use it? Better yet, how do I figure out what to #include, so I know for next time I need to use the Windows API?</p>
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    1. COfor other newbies: I got this to compile with this code: #include "Aclapi.h" LPTSTR path=(LPTSTR)dict_path.utf16(); SetNamedSecurityInfo(path, SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, NULL, NULL, NULL, NULL); But I got a link error, until I also added this in my .pro: `win32:LIBS += -ladvapi32`
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    2. COcan't format my comment above - sorry!
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