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source: vbox/trunk/src/VBox/Runtime/r3/netbsd/rtProcInitExePath-netbsd.cpp@ 103914

Last change on this file since 103914 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

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1/* $Id: rtProcInitExePath-netbsd.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * IPRT - rtProcInitName, NetBSD.
4 */
5
6/*
7 * Copyright (C) 2006-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#define LOG_GROUP RTLOGGROUP_PROCESS
42#include <sys/param.h>
43#include <sys/sysctl.h>
44#include <unistd.h>
45#include <errno.h>
46#include <dlfcn.h>
47#include <link.h>
48
49#include <iprt/string.h>
50#include <iprt/assert.h>
51#include <iprt/errcore.h>
52#include <iprt/path.h>
53#include "internal/process.h"
54#include "internal/path.h"
55
56
57DECLHIDDEN(int) rtProcInitExePath(char *pszPath, size_t cchPath)
58{
59 /*
60 * Read the /proc/curproc/file link, convert to native and return it.
61 */
62 int cchLink = readlink("/proc/curproc/exe", pszPath, cchPath - 1);
63 if (cchLink > 0 && (size_t)cchLink <= cchPath - 1)
64 {
65 pszPath[cchLink] = '\0';
66
67 char const *pszTmp;
68 int rc = rtPathFromNative(&pszTmp, pszPath, NULL);
69 AssertMsgRCReturn(rc, ("rc=%Rrc pszLink=\"%s\"\nhex: %.*Rhxs\n", rc, pszPath, cchLink, pszPath), rc);
70 if (pszTmp != pszPath)
71 {
72 rc = RTStrCopy(pszPath, cchPath, pszTmp);
73 rtPathFreeIprt(pszTmp, pszPath);
74 }
75 return rc;
76 }
77
78 int err = errno;
79
80 /*
81 * Fall back on the dynamic linker since /proc is optional.
82 */
83 void *hExe = dlopen(NULL, 0);
84 if (hExe)
85 {
86 struct link_map const *pLinkMap = 0;
87 if (dlinfo(hExe, RTLD_DI_LINKMAP, &pLinkMap) == 0)
88 {
89 const char *pszImageName = pLinkMap->l_name;
90 if (*pszImageName == '/') /* this may not always be absolute, despite the docs. :-( */
91 {
92 char const *pszTmp;
93 int rc = rtPathFromNative(&pszTmp, pszImageName, NULL);
94 AssertMsgRCReturn(rc, ("rc=%Rrc pszImageName=\"%s\"\n", rc, pszImageName), rc);
95 if (pszTmp != pszPath)
96 {
97 rc = RTStrCopy(pszPath, cchPath, pszTmp);
98 rtPathFreeIprt(pszTmp, pszPath);
99 }
100 return rc;
101 }
102 /** @todo Try search the PATH for the file name or append the current
103 * directory, which ever makes sense... */
104 }
105 }
106
107 int rc = RTErrConvertFromErrno(err);
108 AssertMsgFailed(("rc=%Rrc err=%d cchLink=%d hExe=%p\n", rc, err, cchLink, hExe));
109 return rc;
110}
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