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annotate common/util.c @ 502:e551de11d8b6

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Properly handle the case that the file does not exist. TRUNCATE makes create file fail if the file does not exist but we need TRUNCATE in the case that the file already exists
author Andre Heinecke <aheinecke@intevation.de>
date Mon, 28 Apr 2014 09:18:07 +0000
parents 17e1c8f37d72
children 78959fd970b0
rev   line source
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Andre Heinecke <aheinecke@intevation.de>
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 #include "util.h"
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9 #ifndef _WIN32
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10 #include <unistd.h>
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11 #include <sys/types.h>
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12 #else
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13 #include <windows.h>
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14 #endif
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15
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16 bool
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17 is_elevated()
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18 {
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19 bool ret = false;
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20 #ifndef _WIN32
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21 ret = (geteuid() == 0);
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22 #else
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23 HANDLE hToken = NULL;
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24 if (OpenProcessToken (GetCurrentProcess(), TOKEN_QUERY, &hToken))
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25 {
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26 DWORD elevation;
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27 DWORD cbSize = sizeof (DWORD);
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28 if (GetTokenInformation (hToken, TokenElevation, &elevation,
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29 sizeof (TokenElevation), &cbSize))
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30 {
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31 ret = elevation;
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32 }
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33 }
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34 if (hToken)
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35 CloseHandle (hToken);
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36 #endif
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37 return ret;
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38 }
http://wald.intevation.org/projects/trustbridge/