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/* $Id: rtProcInitExePath-freebsd.cpp $ */
/** @file
* IPRT - rtProcInitName, FreeBSD.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_PROCESS
#include <sys/param.h>
#include <sys/sysctl.h>
#include <unistd.h>
#include <errno.h>
#include <dlfcn.h>
#include <link.h>
#include <iprt/string.h>
#include <iprt/assert.h>
#include <iprt/errcore.h>
#include <iprt/path.h>
#include "internal/process.h"
#include "internal/path.h"
DECLHIDDEN(int) rtProcInitExePath(char *pszPath, size_t cchPath)
{
#ifdef KERN_PROC_PATHNAME
int aiName[4];
aiName[0] = CTL_KERN;
aiName[1] = KERN_PROC;
aiName[2] = KERN_PROC_PATHNAME; /* This was introduced in FreeBSD 6.0, thus the #ifdef above. */
aiName[3] = -1; /* Shorthand for the current process. */
size_t cchExePath = cchPath;
if (sysctl(aiName, RT_ELEMENTS(aiName), pszPath, &cchExePath, NULL, 0) == 0)
{
const char *pszTmp;
int rc = rtPathFromNative(&pszTmp, pszPath, NULL);
AssertMsgRCReturn(rc, ("rc=%Rrc pszPath=\"%s\"\nhex: %.*Rhxs\n", rc, pszPath, cchExePath, pszPath), rc);
if (pszTmp != pszPath)
{
rc = RTStrCopy(pszPath, cchPath, pszTmp);
rtPathFreeIprt(pszTmp, pszPath);
}
return rc;
}
int rc = RTErrConvertFromErrno(errno);
AssertMsgFailed(("rc=%Rrc errno=%d cchExePath=%d\n", rc, errno, cchExePath));
return rc;
#else
/*
* Read the /proc/curproc/file link, convert to native and return it.
*/
int cchLink = readlink("/proc/curproc/file", pszPath, cchPath - 1);
if (cchLink > 0 && (size_t)cchLink <= cchPath - 1)
{
pszPath[cchLink] = '\0';
char const *pszTmp;
int rc = rtPathFromNative(&pszTmp, pszPath);
AssertMsgRCReturn(rc, ("rc=%Rrc pszLink=\"%s\"\nhex: %.*Rhxs\n", rc, pszPath, cchLink, pszPath), rc);
if (pszTmp != pszPath)
{
rc = RTStrCopy(pszPath, cchPath, pszTmp);
rtPathFreeIprt(pszTmp);
}
return rc;
}
int err = errno;
/*
* Fall back on the dynamic linker since /proc is optional.
*/
void *hExe = dlopen(NULL, 0);
if (hExe)
{
struct link_map const *pLinkMap = 0;
if (dlinfo(hExe, RTLD_DI_LINKMAP, &pLinkMap) == 0)
{
const char *pszImageName = pLinkMap->l_name;
if (*pszImageName == '/') /* this may not always be absolute, despite the docs. :-( */
{
char const *pszTmp;
int rc = rtPathFromNative(&pszTmp, pszImageName, NULL);
AssertMsgRCReturn(rc, ("rc=%Rrc pszImageName=\"%s\"\n", rc, pszImageName), rc);
if (pszTmp != pszPath)
{
rc = RTStrCopy(pszPath, cchPath, pszTmp);
rtPathFreeIprt(pszTmp, pszPath);
}
return rc;
}
/** @todo Try search the PATH for the file name or append the current
* directory, which ever makes sense... */
}
}
int rc = RTErrConvertFromErrno(err);
AssertMsgFailed(("rc=%Rrc err=%d cchLink=%d hExe=%p\n", rc, err, cchLink, hExe));
return rc;
#endif
}
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