| 1 | /* $Id: RTProcIsRunningByName-linux.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTProcIsRunningByName, Linux implementation.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2019 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #define LOG_GROUP RTLOGGROUP_PROCESS
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| 32 | #include <iprt/process.h>
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| 33 | #include <iprt/string.h>
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| 34 | #include <iprt/dir.h>
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| 35 | #include <iprt/path.h>
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| 36 | #include <iprt/stream.h>
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| 37 | #include <iprt/param.h>
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| 38 | #include <iprt/assert.h>
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| 39 |
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| 40 | #include <unistd.h>
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| 41 |
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| 42 |
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| 43 | RTR3DECL(bool) RTProcIsRunningByName(const char *pszName)
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| 44 | {
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| 45 | /*
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| 46 | * Quick validation.
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| 47 | */
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| 48 | if (!pszName)
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| 49 | return false;
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| 50 |
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| 51 | bool const fWithPath = RTPathHavePath(pszName);
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| 52 |
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| 53 | /*
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| 54 | * Enumerate /proc.
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| 55 | */
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| 56 | RTDIR hDir;
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| 57 | int rc = RTDirOpen(&hDir, "/proc");
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| 58 | AssertMsgRCReturn(rc, ("RTDirOpen on /proc failed: rc=%Rrc\n", rc), false);
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| 59 | if (RT_SUCCESS(rc))
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| 60 | {
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| 61 | RTDIRENTRY DirEntry;
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| 62 | while (RT_SUCCESS(RTDirRead(hDir, &DirEntry, NULL)))
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| 63 | {
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| 64 | /*
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| 65 | * Filter numeric directory entries only.
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| 66 | */
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| 67 | if ( ( DirEntry.enmType == RTDIRENTRYTYPE_DIRECTORY
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| 68 | || DirEntry.enmType == RTDIRENTRYTYPE_UNKNOWN)
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| 69 | && RTStrToUInt32(DirEntry.szName) > 0)
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| 70 | {
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| 71 | /*
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| 72 | * Try readlink on exe first since it's more faster and reliable.
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| 73 | * Fall back on reading the first line in cmdline if that fails
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| 74 | * (access errors typically). cmdline is unreliable as it might
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| 75 | * contain whatever the execv caller passes as argv[0].
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| 76 | */
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| 77 | char szName[RTPATH_MAX];
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| 78 | RTStrPrintf(szName, sizeof(szName), "/proc/%s/exe", &DirEntry.szName[0]);
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| 79 | char szExe[RTPATH_MAX];
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| 80 | int cchLink = readlink(szName, szExe, sizeof(szExe) - 1);
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| 81 | if ( cchLink > 0
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| 82 | && (size_t)cchLink < sizeof(szExe))
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| 83 | {
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| 84 | szExe[cchLink] = '\0';
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| 85 | rc = VINF_SUCCESS;
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| 86 | }
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| 87 | else
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| 88 | {
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| 89 | RTStrPrintf(szName, sizeof(szName), "/proc/%s/cmdline", &DirEntry.szName[0]);
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| 90 | PRTSTREAM pStream;
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| 91 | rc = RTStrmOpen(szName, "r", &pStream);
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| 92 | if (RT_SUCCESS(rc))
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| 93 | {
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| 94 | rc = RTStrmGetLine(pStream, szExe, sizeof(szExe));
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| 95 | RTStrmClose(pStream);
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| 96 | }
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| 97 | }
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| 98 | if (RT_SUCCESS(rc))
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| 99 | {
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| 100 | /*
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| 101 | * We are interested on the file name part only.
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| 102 | */
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| 103 | char const *pszProcName = fWithPath ? szExe : RTPathFilename(szExe);
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| 104 | if (RTStrCmp(pszProcName, pszName) == 0)
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| 105 | {
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| 106 | /* Found it! */
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| 107 | RTDirClose(hDir);
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| 108 | return true;
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| 109 | }
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| 110 | }
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| 111 | }
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| 112 | }
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| 113 | RTDirClose(hDir);
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| 114 | }
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| 115 |
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| 116 | return false;
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| 117 | }
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| 118 |
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