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/* $Id: RTProcIsRunningByName-linux.cpp $ */
/** @file
* IPRT - RTProcIsRunningByName, Linux implementation.
*/
/*
* Copyright (C) 2009-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_PROCESS
#include <iprt/process.h>
#include <iprt/string.h>
#include <iprt/dir.h>
#include <iprt/path.h>
#include <iprt/stream.h>
#include <iprt/param.h>
#include <iprt/assert.h>
#include <unistd.h>
RTR3DECL(bool) RTProcIsRunningByName(const char *pszName)
{
/*
* Quick validation.
*/
if (!pszName)
return false;
bool const fWithPath = RTPathHavePath(pszName);
/*
* Enumerate /proc.
*/
RTDIR hDir;
int rc = RTDirOpen(&hDir, "/proc");
AssertMsgRCReturn(rc, ("RTDirOpen on /proc failed: rc=%Rrc\n", rc), false);
if (RT_SUCCESS(rc))
{
RTDIRENTRY DirEntry;
while (RT_SUCCESS(RTDirRead(hDir, &DirEntry, NULL)))
{
/*
* Filter numeric directory entries only.
*/
if ( ( DirEntry.enmType == RTDIRENTRYTYPE_DIRECTORY
|| DirEntry.enmType == RTDIRENTRYTYPE_UNKNOWN)
&& RTStrToUInt32(DirEntry.szName) > 0)
{
/*
* Try readlink on exe first since it's more faster and reliable.
* Fall back on reading the first line in cmdline if that fails
* (access errors typically). cmdline is unreliable as it might
* contain whatever the execv caller passes as argv[0].
*/
char szName[RTPATH_MAX];
RTStrPrintf(szName, sizeof(szName), "/proc/%s/exe", &DirEntry.szName[0]);
char szExe[RTPATH_MAX];
int cchLink = readlink(szName, szExe, sizeof(szExe) - 1);
if ( cchLink > 0
&& (size_t)cchLink < sizeof(szExe))
{
szExe[cchLink] = '\0';
rc = VINF_SUCCESS;
}
else
{
RTStrPrintf(szName, sizeof(szName), "/proc/%s/cmdline", &DirEntry.szName[0]);
PRTSTREAM pStream;
rc = RTStrmOpen(szName, "r", &pStream);
if (RT_SUCCESS(rc))
{
rc = RTStrmGetLine(pStream, szExe, sizeof(szExe));
RTStrmClose(pStream);
}
}
if (RT_SUCCESS(rc))
{
/*
* We are interested on the file name part only.
*/
char const *pszProcName = fWithPath ? szExe : RTPathFilename(szExe);
if (RTStrCmp(pszProcName, pszName) == 0)
{
/* Found it! */
RTDirClose(hDir);
return true;
}
}
}
}
RTDirClose(hDir);
}
return false;
}
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