| 1 | /* $Id: rtProcInitExePath-freebsd.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * IPRT - rtProcInitName, FreeBSD.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2020 Oracle Corporation
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * The contents of this file may alternatively be used under the terms
|
|---|
| 18 | * of the Common Development and Distribution License Version 1.0
|
|---|
| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
|
|---|
| 20 | * VirtualBox OSE distribution, in which case the provisions of the
|
|---|
| 21 | * CDDL are applicable instead of those of the GPL.
|
|---|
| 22 | *
|
|---|
| 23 | * You may elect to license modified versions of this file under the
|
|---|
| 24 | * terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 25 | */
|
|---|
| 26 |
|
|---|
| 27 |
|
|---|
| 28 | /*********************************************************************************************************************************
|
|---|
| 29 | * Header Files *
|
|---|
| 30 | *********************************************************************************************************************************/
|
|---|
| 31 | #define LOG_GROUP RTLOGGROUP_PROCESS
|
|---|
| 32 | #include <sys/param.h>
|
|---|
| 33 | #include <sys/sysctl.h>
|
|---|
| 34 | #include <unistd.h>
|
|---|
| 35 | #include <errno.h>
|
|---|
| 36 | #include <dlfcn.h>
|
|---|
| 37 | #include <link.h>
|
|---|
| 38 |
|
|---|
| 39 | #include <iprt/string.h>
|
|---|
| 40 | #include <iprt/assert.h>
|
|---|
| 41 | #include <iprt/errcore.h>
|
|---|
| 42 | #include <iprt/path.h>
|
|---|
| 43 | #include "internal/process.h"
|
|---|
| 44 | #include "internal/path.h"
|
|---|
| 45 |
|
|---|
| 46 |
|
|---|
| 47 | DECLHIDDEN(int) rtProcInitExePath(char *pszPath, size_t cchPath)
|
|---|
| 48 | {
|
|---|
| 49 | #ifdef KERN_PROC_PATHNAME
|
|---|
| 50 | int aiName[4];
|
|---|
| 51 | aiName[0] = CTL_KERN;
|
|---|
| 52 | aiName[1] = KERN_PROC;
|
|---|
| 53 | aiName[2] = KERN_PROC_PATHNAME; /* This was introduced in FreeBSD 6.0, thus the #ifdef above. */
|
|---|
| 54 | aiName[3] = -1; /* Shorthand for the current process. */
|
|---|
| 55 |
|
|---|
| 56 | size_t cchExePath = cchPath;
|
|---|
| 57 | if (sysctl(aiName, RT_ELEMENTS(aiName), pszPath, &cchExePath, NULL, 0) == 0)
|
|---|
| 58 | {
|
|---|
| 59 | const char *pszTmp;
|
|---|
| 60 | int rc = rtPathFromNative(&pszTmp, pszPath, NULL);
|
|---|
| 61 | AssertMsgRCReturn(rc, ("rc=%Rrc pszPath=\"%s\"\nhex: %.*Rhxs\n", rc, pszPath, cchExePath, pszPath), rc);
|
|---|
| 62 | if (pszTmp != pszPath)
|
|---|
| 63 | {
|
|---|
| 64 | rc = RTStrCopy(pszPath, cchPath, pszTmp);
|
|---|
| 65 | rtPathFreeIprt(pszTmp, pszPath);
|
|---|
| 66 | }
|
|---|
| 67 | return rc;
|
|---|
| 68 | }
|
|---|
| 69 |
|
|---|
| 70 | int rc = RTErrConvertFromErrno(errno);
|
|---|
| 71 | AssertMsgFailed(("rc=%Rrc errno=%d cchExePath=%d\n", rc, errno, cchExePath));
|
|---|
| 72 | return rc;
|
|---|
| 73 |
|
|---|
| 74 | #else
|
|---|
| 75 |
|
|---|
| 76 | /*
|
|---|
| 77 | * Read the /proc/curproc/file link, convert to native and return it.
|
|---|
| 78 | */
|
|---|
| 79 | int cchLink = readlink("/proc/curproc/file", pszPath, cchPath - 1);
|
|---|
| 80 | if (cchLink > 0 && (size_t)cchLink <= cchPath - 1)
|
|---|
| 81 | {
|
|---|
| 82 | pszPath[cchLink] = '\0';
|
|---|
| 83 |
|
|---|
| 84 | char const *pszTmp;
|
|---|
| 85 | int rc = rtPathFromNative(&pszTmp, pszPath);
|
|---|
| 86 | AssertMsgRCReturn(rc, ("rc=%Rrc pszLink=\"%s\"\nhex: %.*Rhxs\n", rc, pszPath, cchLink, pszPath), rc);
|
|---|
| 87 | if (pszTmp != pszPath)
|
|---|
| 88 | {
|
|---|
| 89 | rc = RTStrCopy(pszPath, cchPath, pszTmp);
|
|---|
| 90 | rtPathFreeIprt(pszTmp);
|
|---|
| 91 | }
|
|---|
| 92 | return rc;
|
|---|
| 93 | }
|
|---|
| 94 |
|
|---|
| 95 | int err = errno;
|
|---|
| 96 |
|
|---|
| 97 | /*
|
|---|
| 98 | * Fall back on the dynamic linker since /proc is optional.
|
|---|
| 99 | */
|
|---|
| 100 | void *hExe = dlopen(NULL, 0);
|
|---|
| 101 | if (hExe)
|
|---|
| 102 | {
|
|---|
| 103 | struct link_map const *pLinkMap = 0;
|
|---|
| 104 | if (dlinfo(hExe, RTLD_DI_LINKMAP, &pLinkMap) == 0)
|
|---|
| 105 | {
|
|---|
| 106 | const char *pszImageName = pLinkMap->l_name;
|
|---|
| 107 | if (*pszImageName == '/') /* this may not always be absolute, despite the docs. :-( */
|
|---|
| 108 | {
|
|---|
| 109 | char const *pszTmp;
|
|---|
| 110 | int rc = rtPathFromNative(&pszTmp, pszImageName, NULL);
|
|---|
| 111 | AssertMsgRCReturn(rc, ("rc=%Rrc pszImageName=\"%s\"\n", rc, pszImageName), rc);
|
|---|
| 112 | if (pszTmp != pszPath)
|
|---|
| 113 | {
|
|---|
| 114 | rc = RTStrCopy(pszPath, cchPath, pszTmp);
|
|---|
| 115 | rtPathFreeIprt(pszTmp, pszPath);
|
|---|
| 116 | }
|
|---|
| 117 | return rc;
|
|---|
| 118 | }
|
|---|
| 119 | /** @todo Try search the PATH for the file name or append the current
|
|---|
| 120 | * directory, which ever makes sense... */
|
|---|
| 121 | }
|
|---|
| 122 | }
|
|---|
| 123 |
|
|---|
| 124 | int rc = RTErrConvertFromErrno(err);
|
|---|
| 125 | AssertMsgFailed(("rc=%Rrc err=%d cchLink=%d hExe=%p\n", rc, err, cchLink, hExe));
|
|---|
| 126 | return rc;
|
|---|
| 127 | #endif
|
|---|
| 128 | }
|
|---|
| 129 |
|
|---|
