| 1 | /* $Id: rtProcInitExePath-netbsd.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - rtProcInitName, NetBSD.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2022 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 <sys/param.h>
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| 43 | #include <sys/sysctl.h>
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| 44 | #include <unistd.h>
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| 45 | #include <errno.h>
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| 46 | #include <dlfcn.h>
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| 47 | #include <link.h>
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| 48 |
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| 49 | #include <iprt/string.h>
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| 50 | #include <iprt/assert.h>
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| 51 | #include <iprt/errcore.h>
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| 52 | #include <iprt/path.h>
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| 53 | #include "internal/process.h"
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| 54 | #include "internal/path.h"
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| 55 |
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| 56 |
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| 57 | DECLHIDDEN(int) rtProcInitExePath(char *pszPath, size_t cchPath)
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| 58 | {
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| 59 | /*
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| 60 | * Read the /proc/curproc/file link, convert to native and return it.
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| 61 | */
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| 62 | int cchLink = readlink("/proc/curproc/exe", pszPath, cchPath - 1);
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| 63 | if (cchLink > 0 && (size_t)cchLink <= cchPath - 1)
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| 64 | {
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| 65 | pszPath[cchLink] = '\0';
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| 66 |
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| 67 | char const *pszTmp;
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| 68 | int rc = rtPathFromNative(&pszTmp, pszPath, NULL);
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| 69 | AssertMsgRCReturn(rc, ("rc=%Rrc pszLink=\"%s\"\nhex: %.*Rhxs\n", rc, pszPath, cchLink, pszPath), rc);
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| 70 | if (pszTmp != pszPath)
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| 71 | {
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| 72 | rc = RTStrCopy(pszPath, cchPath, pszTmp);
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| 73 | rtPathFreeIprt(pszTmp, pszPath);
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| 74 | }
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| 75 | return rc;
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| 76 | }
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| 77 |
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| 78 | int err = errno;
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| 79 |
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| 80 | /*
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| 81 | * Fall back on the dynamic linker since /proc is optional.
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| 82 | */
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| 83 | void *hExe = dlopen(NULL, 0);
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| 84 | if (hExe)
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| 85 | {
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| 86 | struct link_map const *pLinkMap = 0;
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| 87 | if (dlinfo(hExe, RTLD_DI_LINKMAP, &pLinkMap) == 0)
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| 88 | {
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| 89 | const char *pszImageName = pLinkMap->l_name;
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| 90 | if (*pszImageName == '/') /* this may not always be absolute, despite the docs. :-( */
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| 91 | {
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| 92 | char const *pszTmp;
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| 93 | int rc = rtPathFromNative(&pszTmp, pszImageName, NULL);
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| 94 | AssertMsgRCReturn(rc, ("rc=%Rrc pszImageName=\"%s\"\n", rc, pszImageName), rc);
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| 95 | if (pszTmp != pszPath)
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| 96 | {
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| 97 | rc = RTStrCopy(pszPath, cchPath, pszTmp);
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| 98 | rtPathFreeIprt(pszTmp, pszPath);
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| 99 | }
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| 100 | return rc;
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| 101 | }
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| 102 | /** @todo Try search the PATH for the file name or append the current
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| 103 | * directory, which ever makes sense... */
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| 104 | }
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| 105 | }
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| 106 |
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| 107 | int rc = RTErrConvertFromErrno(err);
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| 108 | AssertMsgFailed(("rc=%Rrc err=%d cchLink=%d hExe=%p\n", rc, err, cchLink, hExe));
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| 109 | return rc;
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| 110 | }
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