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/***
*stat64.c - get file status** Copyright (c) 1998-2001, Microsoft Corporation. All rights reserved.**Purpose:* defines _stat64() - get file status**Revision History:* 06-02-98 GJF Created.* 11-10-99 GB Made changes so as to take care of DST.********************************************************************************/
#include <cruntime.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <ctype.h>
#include <msdos.h>
#include <oscalls.h>
#include <string.h>
#include <internal.h>
#include <stdlib.h>
#include <direct.h>
#include <mbstring.h>
#include <tchar.h>
#define ISSLASH(a) ((a) == _T('\\') || (a) == _T('/'))
/*
* Number of 100 nanosecond units from 1/1/1601 to 1/1/1970 */#define EPOCH_BIAS 116444736000000000i64
#ifdef _UNICODE
#define __tdtoxmode __wdtoxmode
#else /* ndef _UNICODE */
#define __tdtoxmode __dtoxmode
#endif /* _UNICODE */
/*
* Local routine which returns true if the argument is a UNC name * specifying the root name of a share, such as '\\server\share\'. */
static int IsRootUNCName(const _TSCHAR *path);
extern unsigned short __cdecl __tdtoxmode(int, const _TSCHAR *);
/***
*int _stat64(name, buf) - get file status info**Purpose:* _stat64 obtains information about the file and stores it in the* structure pointed to by buf.** Note: Unlike _stat, _stat64 uses the UTC time values returned in* WIN32_FIND_DATA struct. This means the time values will always be* correct on NTFS, but may be wrong on FAT file systems for file times* whose DST state is different from the current DST state (this an NT* bug).**Entry:* _TSCHAR *name - pathname of given file* struct _stat *buffer - pointer to buffer to store info in**Exit:* fills in structure pointed to by buffer* returns 0 if successful* returns -1 and sets errno if unsuccessful**Exceptions:********************************************************************************/
int __cdecl _tstat64 ( REG1 const _TSCHAR *name, REG2 struct __stat64 *buf ){ _TSCHAR * path; _TSCHAR pathbuf[ _MAX_PATH ]; int drive; /* A: = 1, B: = 2, etc. */ HANDLE findhandle; WIN32_FIND_DATA findbuf;
/* Don't allow wildcards to be interpreted by system */
#ifdef _UNICODE
if (wcspbrk(name, L"?*")) {#else
if (_mbspbrk(name, "?*")) {#endif
errno = ENOENT; _doserrno = E_nofile; return(-1); }
/* Try to get disk from name. If none, get current disk. */
if (name[1] == _T(':')){ if ( *name && !name[2] ){ errno = ENOENT; /* return an error if name is */ _doserrno = E_nofile; /* just drive letter then colon */ return( -1 ); } drive = _totlower(*name) - _T('a') + 1; } else drive = _getdrive();
/* Call Find Match File */ findhandle = FindFirstFile((_TSCHAR *)name, &findbuf); if ( findhandle == INVALID_HANDLE_VALUE ) {#ifdef _UNICODE
if ( !( wcspbrk(name, L"./\\") &&#else
if ( !( _mbspbrk(name, "./\\") &&#endif
(path = _tfullpath( pathbuf, name, _MAX_PATH )) && /* root dir. ('C:\') or UNC root dir. ('\\server\share\') */ ((_tcslen( path ) == 3) || IsRootUNCName(path)) && (GetDriveType( path ) > 1) ) ) { errno = ENOENT; _doserrno = E_nofile; return( -1 ); }
/*
* Root directories (such as C:\ or \\server\share\ are fabricated. */
findbuf.dwFileAttributes = A_D; findbuf.nFileSizeHigh = 0; findbuf.nFileSizeLow = 0; findbuf.cFileName[0] = _T('\0');
buf->st_mtime = __loctotime64_t(1980,1,1,0,0,0, -1); buf->st_atime = buf->st_mtime; buf->st_ctime = buf->st_mtime; } else { SYSTEMTIME SystemTime; FILETIME LocalFTime;
if ( !FileTimeToLocalFileTime( &findbuf.ftLastWriteTime, &LocalFTime ) || !FileTimeToSystemTime( &LocalFTime, &SystemTime ) ) { _dosmaperr( GetLastError() ); FindClose( findhandle ); return( -1 ); }
buf->st_mtime = __loctotime64_t( SystemTime.wYear, SystemTime.wMonth, SystemTime.wDay, SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond, -1 );
if ( findbuf.ftLastAccessTime.dwLowDateTime || findbuf.ftLastAccessTime.dwHighDateTime ) { if ( !FileTimeToLocalFileTime( &findbuf.ftLastAccessTime, &LocalFTime ) || !FileTimeToSystemTime( &LocalFTime, &SystemTime ) ) { _dosmaperr( GetLastError() ); FindClose( findhandle ); return( -1 ); }
buf->st_atime = __loctotime64_t( SystemTime.wYear, SystemTime.wMonth, SystemTime.wDay, SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond, -1 ); } else buf->st_atime = buf->st_mtime ;
if ( findbuf.ftCreationTime.dwLowDateTime || findbuf.ftCreationTime.dwHighDateTime ) { if ( !FileTimeToLocalFileTime( &findbuf.ftCreationTime, &LocalFTime ) || !FileTimeToSystemTime( &LocalFTime, &SystemTime ) ) { _dosmaperr( GetLastError() ); FindClose( findhandle ); return( -1 ); }
buf->st_ctime = __loctotime64_t( SystemTime.wYear, SystemTime.wMonth, SystemTime.wDay, SystemTime.wHour, SystemTime.wMinute, SystemTime.wSecond, -1 ); } else buf->st_ctime = buf->st_mtime ;
FindClose(findhandle); }
/* Fill in buf */
buf->st_mode = __tdtoxmode(findbuf.dwFileAttributes, name); buf->st_nlink = 1; buf->st_size = ((__int64)(findbuf.nFileSizeHigh)) * (0x100000000i64) + (__int64)(findbuf.nFileSizeLow);
/* now set the common fields */
buf->st_uid = buf->st_gid = buf->st_ino = 0;
buf->st_rdev = buf->st_dev = (_dev_t)(drive - 1); /* A=0, B=1, etc. */
return(0);}
/*
* IsRootUNCName - returns TRUE if the argument is a UNC name specifying * a root share. That is, if it is of the form \\server\share\. * This routine will also return true if the argument is of the * form \\server\share (no trailing slash) but Win32 currently * does not like that form. * * Forward slashes ('/') may be used instead of backslashes ('\'). */
static int IsRootUNCName(const _TSCHAR *path){ /*
* If a root UNC name, path will start with 2 (but not 3) slashes */
if ( ( _tcslen ( path ) >= 5 ) /* minimum string is "//x/y" */ && ISSLASH(path[0]) && ISSLASH(path[1])) { const _TSCHAR * p = path + 2 ;
/*
* find the slash between the server name and share name */ while ( * ++ p ) if ( ISSLASH(*p) ) break ;
if ( *p && p[1] ) { /*
* is there a further slash? */ while ( * ++ p ) if ( ISSLASH(*p) ) break ;
/*
* just final slash (or no final slash) */ if ( !*p || !p[1]) return 1; } }
return 0 ;}
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