VirtualBox

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

Last change on this file since 103914 was 98103, checked in by vboxsync, 23 months ago

Copyright year updates by scm.

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1/* $Id: rtProcInitExePath-freebsd.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * IPRT - rtProcInitName, FreeBSD.
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#ifdef KERN_PROC_PATHNAME
60 int aiName[4];
61 aiName[0] = CTL_KERN;
62 aiName[1] = KERN_PROC;
63 aiName[2] = KERN_PROC_PATHNAME; /* This was introduced in FreeBSD 6.0, thus the #ifdef above. */
64 aiName[3] = -1; /* Shorthand for the current process. */
65
66 size_t cchExePath = cchPath;
67 if (sysctl(aiName, RT_ELEMENTS(aiName), pszPath, &cchExePath, NULL, 0) == 0)
68 {
69 const char *pszTmp;
70 int rc = rtPathFromNative(&pszTmp, pszPath, NULL);
71 AssertMsgRCReturn(rc, ("rc=%Rrc pszPath=\"%s\"\nhex: %.*Rhxs\n", rc, pszPath, cchExePath, pszPath), rc);
72 if (pszTmp != pszPath)
73 {
74 rc = RTStrCopy(pszPath, cchPath, pszTmp);
75 rtPathFreeIprt(pszTmp, pszPath);
76 }
77 return rc;
78 }
79
80 int rc = RTErrConvertFromErrno(errno);
81 AssertMsgFailed(("rc=%Rrc errno=%d cchExePath=%d\n", rc, errno, cchExePath));
82 return rc;
83
84#else
85
86 /*
87 * Read the /proc/curproc/file link, convert to native and return it.
88 */
89 int cchLink = readlink("/proc/curproc/file", pszPath, cchPath - 1);
90 if (cchLink > 0 && (size_t)cchLink <= cchPath - 1)
91 {
92 pszPath[cchLink] = '\0';
93
94 char const *pszTmp;
95 int rc = rtPathFromNative(&pszTmp, pszPath);
96 AssertMsgRCReturn(rc, ("rc=%Rrc pszLink=\"%s\"\nhex: %.*Rhxs\n", rc, pszPath, cchLink, pszPath), rc);
97 if (pszTmp != pszPath)
98 {
99 rc = RTStrCopy(pszPath, cchPath, pszTmp);
100 rtPathFreeIprt(pszTmp);
101 }
102 return rc;
103 }
104
105 int err = errno;
106
107 /*
108 * Fall back on the dynamic linker since /proc is optional.
109 */
110 void *hExe = dlopen(NULL, 0);
111 if (hExe)
112 {
113 struct link_map const *pLinkMap = 0;
114 if (dlinfo(hExe, RTLD_DI_LINKMAP, &pLinkMap) == 0)
115 {
116 const char *pszImageName = pLinkMap->l_name;
117 if (*pszImageName == '/') /* this may not always be absolute, despite the docs. :-( */
118 {
119 char const *pszTmp;
120 int rc = rtPathFromNative(&pszTmp, pszImageName, NULL);
121 AssertMsgRCReturn(rc, ("rc=%Rrc pszImageName=\"%s\"\n", rc, pszImageName), rc);
122 if (pszTmp != pszPath)
123 {
124 rc = RTStrCopy(pszPath, cchPath, pszTmp);
125 rtPathFreeIprt(pszTmp, pszPath);
126 }
127 return rc;
128 }
129 /** @todo Try search the PATH for the file name or append the current
130 * directory, which ever makes sense... */
131 }
132 }
133
134 int rc = RTErrConvertFromErrno(err);
135 AssertMsgFailed(("rc=%Rrc err=%d cchLink=%d hExe=%p\n", rc, err, cchLink, hExe));
136 return rc;
137#endif
138}
139
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