1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/genericopenlibs/openenvcore/libc/src/link.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,210 @@
1.4 +/*
1.5 +* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
1.6 +* All rights reserved.
1.7 +* This component and the accompanying materials are made available
1.8 +* under the terms of "Eclipse Public License v1.0"
1.9 +* which accompanies this distribution, and is available
1.10 +* at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.11 +*
1.12 +* Initial Contributors:
1.13 +* Nokia Corporation - initial contribution.
1.14 +*
1.15 +* Contributors:
1.16 +*
1.17 +* Description: Implementation of link/symlink.
1.18 +*
1.19 +*/
1.20 +
1.21 +
1.22 +// INCLUDE FILES
1.23 +
1.24 +#include <sys/errno.h>
1.25 +#include <sys/types.h>
1.26 +#include <wchar.h>
1.27 +#include <string.h>
1.28 +#include <unistd.h>
1.29 +#include "lposix.h"
1.30 +#include <sys/stat.h>
1.31 +#include <sys/limits.h>
1.32 +#include "sysreent.h"
1.33 +#include <stdlib.h>
1.34 +#include "sysif.h"
1.35 +#include "systemspecialfilercg.h"
1.36 +#include "link.h"
1.37 +
1.38 +// -----------------------------------------------------------------------------
1.39 +// Funcation name: link
1.40 +// Description: Provides link functionality.
1.41 +// Returns: 0 : On success
1.42 +// -1 : On error
1.43 +// In case of error, errno value set
1.44 +// Remark: This is a simulated functionality and not supported by the platform
1.45 +// -----------------------------------------------------------------------------
1.46 +//
1.47 +
1.48 +extern "C" {
1.49 +
1.50 +#define MAXPATHLEN 260 /* E32STD.H: KMaxFullName + 4 to avoid data loss */
1.51 +
1.52 +EXPORT_C int link(const char *oldpath, const char *newpath)
1.53 + {
1.54 + wchar_t _oldwidename[MAXPATHLEN+1];
1.55 + wchar_t _newwidename[MAXPATHLEN+1];
1.56 +
1.57 + if ((size_t)-1 != mbstowcs(_oldwidename, oldpath, MAXPATHLEN) && \
1.58 + (size_t)-1 != mbstowcs(_newwidename, newpath, MAXPATHLEN))
1.59 + {
1.60 + return _link_r(&errno, _oldwidename, _newwidename);
1.61 + }
1.62 + errno = EILSEQ;
1.63 + return -1;
1.64 + }
1.65 +
1.66 +// -----------------------------------------------------------------------------
1.67 +// Funcation name: symlink
1.68 +// Description: Provides symlink functionality which is exactly similar to link
1.69 +// in our case.
1.70 +// Returns: ssize_t : On success
1.71 +// -1 : On error
1.72 +// In case of error, errno value set
1.73 +//
1.74 +// -----------------------------------------------------------------------------
1.75 +//
1.76 +
1.77 +EXPORT_C int symlink(const char *oldpath, const char *newpath)
1.78 + {
1.79 + wchar_t _oldwidename[MAXPATHLEN+1];
1.80 + wchar_t _newwidename[MAXPATHLEN+1];
1.81 +
1.82 + if ((size_t)-1 != mbstowcs(_oldwidename, oldpath, MAXPATHLEN) && \
1.83 + (size_t)-1 != mbstowcs(_newwidename, newpath, MAXPATHLEN))
1.84 + {
1.85 + return _link_r(&errno, _oldwidename, _newwidename);
1.86 + }
1.87 + errno = EILSEQ;
1.88 + return -1;
1.89 + }
1.90 +
1.91 +// -----------------------------------------------------------------------------
1.92 +// Funcation name: readlink
1.93 +// Description: Reads the link file.
1.94 +// Returns: ssize_t : On success
1.95 +// -1 : On error
1.96 +// In case of error, errno value set
1.97 +//
1.98 +// -----------------------------------------------------------------------------
1.99 +//
1.100 +
1.101 +EXPORT_C ssize_t readlink(const char *path, char *buf, int bufsize)
1.102 +{
1.103 + TSpecialFileType fileType;
1.104 + struct SLinkInfo enBuf;
1.105 + int err = KErrNone;
1.106 + char name[MAXPATHLEN+1];
1.107 +
1.108 + wchar_t widename[MAXPATHLEN+1];
1.109 +
1.110 + if(path)
1.111 + {
1.112 + if ((size_t)-1 != mbstowcs(widename, path, MAXPATHLEN))
1.113 + {
1.114 + /*Special file identification and read of IPC is utilized here*/
1.115 + if( (fileType = _SystemSpecialFileBasedFilePath(widename, err, Backend()->FileSession())) == EFileTypeSymLink)
1.116 + {
1.117 + if (err)
1.118 + {
1.119 + return MapError(err, errno);
1.120 + }
1.121 + err = _ReadSysSplFile(widename, (char*)&enBuf, sizeof(struct SLinkInfo), errno, Backend()->FileSession());
1.122 + if (err == KErrNone)
1.123 + {
1.124 + if((0 < bufsize && bufsize <= SSIZE_MAX) && NULL != buf )
1.125 + {
1.126 + if ((size_t)-1 != wcstombs(name, enBuf.iParentPath, sizeof(enBuf.iParentPath)))
1.127 + {
1.128 + strncpy(buf, name, bufsize);
1.129 + return (strlen(name) >= bufsize ? bufsize : strlen(buf));
1.130 + }
1.131 + }
1.132 + else
1.133 + {
1.134 + errno = EINVAL;
1.135 + return -1;
1.136 + }
1.137 + }
1.138 + }
1.139 + else if(err || (EFileNotFound == fileType))
1.140 + {
1.141 + return MapError(err, errno);
1.142 + }
1.143 + errno = EINVAL;
1.144 + return -1;
1.145 + }
1.146 + return MapError(EILSEQ, errno);
1.147 + }
1.148 + return MapError(EINVAL, errno);
1.149 + }
1.150 +
1.151 +// -----------------------------------------------------------------------------
1.152 +// Funcation name: unlink
1.153 +// Description: Provides unlink functionality.
1.154 +// Returns: 0 : On success
1.155 +// -1 : On error
1.156 +// In case of error, errno value set
1.157 +//
1.158 +// -----------------------------------------------------------------------------
1.159 +//
1.160 +
1.161 +EXPORT_C int unlink(const char *pathname)
1.162 +{
1.163 + wchar_t _pathwidename[MAXPATHLEN+1];
1.164 +
1.165 + if ((size_t)-1 != mbstowcs(_pathwidename, pathname, MAXPATHLEN))
1.166 + {
1.167 + return _unlink_r(&errno, _pathwidename);
1.168 + }
1.169 + errno = EILSEQ;
1.170 + return -1;
1.171 +}
1.172 +
1.173 +// -----------------------------------------------------------------------------
1.174 +// Funcation name: lstat, __xstat, __lxstat
1.175 +// Description: All these functions directly call stat by themself .
1.176 +// Returns: 0 : On success
1.177 +// -1 : On error
1.178 +// In case of error, errno value set
1.179 +//
1.180 +// -----------------------------------------------------------------------------
1.181 +//
1.182 +
1.183 +EXPORT_C int lstat(const char *file_name, struct stat *buf)
1.184 + {
1.185 + if(!buf)
1.186 + {
1.187 + errno = EFAULT ;
1.188 + return -1 ;
1.189 + }
1.190 +
1.191 + wchar_t tmpbuf[MAXPATHLEN+1];
1.192 + if ((size_t)-1 != mbstowcs(tmpbuf, file_name, MAXPATHLEN))
1.193 + {
1.194 + return _lstat_r(&errno, tmpbuf, buf);
1.195 + }
1.196 + errno = EILSEQ;
1.197 + return -1;
1.198 + }
1.199 +EXPORT_C int __xstat(int /*vers*/, const char *file, struct stat *buf)
1.200 + {
1.201 + return stat(file, buf);
1.202 + }
1.203 +
1.204 +EXPORT_C int __lxstat (int /*version*/, const char *file, struct stat *buf)
1.205 + {
1.206 + return lstat(file, buf);
1.207 + }
1.208 +
1.209 +
1.210 +} // extern "C"
1.211 +
1.212 +
1.213 +// End of File