| 1 | /* $Id: RTProcIsRunningByName-linux.cpp 96407 2022-08-22 17:43:14Z 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) 2009-2022 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #define LOG_GROUP RTLOGGROUP_PROCESS
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| 42 | #include <iprt/process.h>
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| 43 | #include <iprt/string.h>
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| 44 | #include <iprt/dir.h>
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| 45 | #include <iprt/path.h>
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| 46 | #include <iprt/stream.h>
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| 47 | #include <iprt/param.h>
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| 48 | #include <iprt/assert.h>
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| 49 |
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| 50 | #include <unistd.h>
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| 51 |
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| 52 |
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| 53 | RTR3DECL(bool) RTProcIsRunningByName(const char *pszName)
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| 54 | {
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| 55 | /*
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| 56 | * Quick validation.
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| 57 | */
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| 58 | if (!pszName)
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| 59 | return false;
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| 60 |
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| 61 | bool const fWithPath = RTPathHavePath(pszName);
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| 62 |
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| 63 | /*
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| 64 | * Enumerate /proc.
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| 65 | */
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| 66 | RTDIR hDir;
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| 67 | int rc = RTDirOpen(&hDir, "/proc");
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| 68 | AssertMsgRCReturn(rc, ("RTDirOpen on /proc failed: rc=%Rrc\n", rc), false);
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| 69 | if (RT_SUCCESS(rc))
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| 70 | {
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| 71 | RTDIRENTRY DirEntry;
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| 72 | while (RT_SUCCESS(RTDirRead(hDir, &DirEntry, NULL)))
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| 73 | {
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| 74 | /*
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| 75 | * Filter numeric directory entries only.
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| 76 | */
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| 77 | if ( ( DirEntry.enmType == RTDIRENTRYTYPE_DIRECTORY
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| 78 | || DirEntry.enmType == RTDIRENTRYTYPE_UNKNOWN)
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| 79 | && RTStrToUInt32(DirEntry.szName) > 0)
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| 80 | {
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| 81 | /*
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| 82 | * Try readlink on exe first since it's more faster and reliable.
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| 83 | * Fall back on reading the first line in cmdline if that fails
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| 84 | * (access errors typically). cmdline is unreliable as it might
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| 85 | * contain whatever the execv caller passes as argv[0].
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| 86 | */
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| 87 | char szName[RTPATH_MAX];
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| 88 | RTStrPrintf(szName, sizeof(szName), "/proc/%s/exe", &DirEntry.szName[0]);
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| 89 | char szExe[RTPATH_MAX];
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| 90 | int cchLink = readlink(szName, szExe, sizeof(szExe) - 1);
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| 91 | if ( cchLink > 0
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| 92 | && (size_t)cchLink < sizeof(szExe))
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| 93 | {
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| 94 | szExe[cchLink] = '\0';
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| 95 | rc = VINF_SUCCESS;
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| 96 | }
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| 97 | else
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| 98 | {
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| 99 | RTStrPrintf(szName, sizeof(szName), "/proc/%s/cmdline", &DirEntry.szName[0]);
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| 100 | PRTSTREAM pStream;
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| 101 | rc = RTStrmOpen(szName, "r", &pStream);
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| 102 | if (RT_SUCCESS(rc))
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| 103 | {
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| 104 | rc = RTStrmGetLine(pStream, szExe, sizeof(szExe));
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| 105 | RTStrmClose(pStream);
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| 106 | }
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| 107 | }
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| 108 | if (RT_SUCCESS(rc))
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| 109 | {
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| 110 | /*
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| 111 | * We are interested on the file name part only.
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| 112 | */
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| 113 | char const *pszProcName = fWithPath ? szExe : RTPathFilename(szExe);
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| 114 | if (RTStrCmp(pszProcName, pszName) == 0)
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| 115 | {
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| 116 | /* Found it! */
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| 117 | RTDirClose(hDir);
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| 118 | return true;
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| 119 | }
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| 120 | }
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| 121 | }
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| 122 | }
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| 123 | RTDirClose(hDir);
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| 124 | }
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| 125 |
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| 126 | return false;
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| 127 | }
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| 128 |
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