d7ce700605
Add Posix functions for porting compatibility. Fix compliance issues with ISO/IEC 9899:199409 New Functions: setenv(), fparseln(), GetFileNameFromPath(), rename(), realpath(), setprogname(), getprogname(), strlcat(), strlcpy(), strsep(), setitimer(), getitimer(), timegm(), getopt(), basename(), mkstemp(), ffs(), vsnprintf(), snprintf(), getpass(), usleep(), select(), writev(), strcasecmp(), getcwd(), chdir(), tcgetpgrp(), getpgrp(), gettimeofday(), bcopy(), git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12061 6f19259b-4bc3-4df7-8a09-765794883524
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/** @file
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Implement the realpath function.
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Copyright (c) 2011, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <LibConfig.h>
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#include <Library/BaseLib.h>
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#include <Library/PathLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <errno.h>
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/**
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The realpath() function shall derive, from the pathname pointed to by
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file_name, an absolute pathname that names the same file, whose resolution
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does not involve '.', '..', or symbolic links. The generated pathname shall
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be stored as a null-terminated string, up to a maximum of {PATH_MAX} bytes,
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in the buffer pointed to by resolved_name.
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If resolved_name is a null pointer, the behavior of realpath() is
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implementation-defined.
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@param[in] file_name The filename to convert.
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@param[in,out] resolved_name The resultant name.
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@retval NULL An error occured.
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@return resolved_name.
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**/
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char *
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realpath(
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char *file_name,
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char *resolved_name
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)
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{
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CHAR16 *Temp;
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if (file_name == NULL || resolved_name == NULL) {
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errno = EINVAL;
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return (NULL);
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}
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Temp = AllocateZeroPool((1+AsciiStrLen(file_name))*sizeof(CHAR16));
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if (Temp == NULL) {
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errno = ENOMEM;
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return (NULL);
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}
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AsciiStrToUnicodeStr(file_name, Temp);
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PathCleanUpDirectories(Temp);
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UnicodeStrToAsciiStr(Temp, resolved_name);
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return (resolved_name);
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} |