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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*++
Module Name:
path.c
Abstract:
Implementation of path functions part of Windows runtime library.
Revision History:
--*/
#include "pal/palinternal.h"
#include "pal/dbgmsg.h"
#include "pal/file.h"
#include "pal/printfcpp.hpp"
#include <string.h>
#include <stdlib.h>
#include <sys/param.h>
#include <errno.h>
#include <limits.h>
SET_DEFAULT_DEBUG_CHANNEL(CRT);
/*++
Function:
_fullpath
See MSDN doc.
--*/
char *
__cdecl
_fullpath(
char *absPath,
const char *relPath,
size_t maxLength)
{
char realpath_buf[PATH_MAX+1];
char path_copy[PATH_MAX+1];
char *retval = NULL;
DWORD cPathCopy = sizeof(path_copy)/sizeof(path_copy[0]);
size_t min_length;
BOOL fBufAllocated = FALSE;
PERF_ENTRY(_fullpath);
ENTRY("_fullpath (absPath=%p, relPath=%p (%s), maxLength = %lu)\n",
absPath, relPath ? relPath:"NULL", relPath ? relPath:"NULL", maxLength);
if (strncpy_s(path_copy, sizeof(path_copy), relPath ? relPath : ".", cPathCopy) != SAFECRT_SUCCESS)
{
TRACE("_fullpath: strncpy_s failed!\n");
goto fullpathExit;
}
FILEDosToUnixPathA(path_copy);
if(NULL == realpath(path_copy, realpath_buf))
{
ERROR("realpath() failed; problem path is '%s'. errno is %d (%s)\n",
realpath_buf, errno, strerror(errno));
goto fullpathExit;
}
TRACE("real path is %s\n", realpath_buf);
min_length = strlen(realpath_buf)+1; // +1 for the NULL terminator
if(NULL == absPath)
{
absPath = static_cast<char *>(
PAL_malloc(_MAX_PATH * sizeof(char)));
if (!absPath)
{
ERROR("PAL_malloc failed with error %d\n", errno);
goto fullpathExit;
}
maxLength = _MAX_PATH;
fBufAllocated = TRUE;
}
if(min_length > maxLength)
{
ERROR("maxLength is %lu, we need at least %lu\n",
maxLength, min_length);
if (fBufAllocated)
{
PAL_free(absPath);
fBufAllocated = FALSE;
}
goto fullpathExit;
}
strcpy_s(absPath, maxLength, realpath_buf);
retval = absPath;
fullpathExit:
LOGEXIT("_fullpath returns char * %p\n", retval);
PERF_EXIT(_fullpath);
return retval;
}
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