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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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chmod.c
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1998-06-17
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/***
*chmod.c - change file attributes
*
* Copyright (c) 1989-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Defines _chmod() - change file attributes
*
*******************************************************************************/
#ifndef _MAC
#include <cruntime.h>
#include <oscalls.h>
#include <internal.h>
#include <io.h>
#include <sys\types.h>
#include <sys\stat.h>
#include <tchar.h>
/***
*int _chmod(path, mode) - change file mode
*
*Purpose:
* Changes file mode permission setting to that specified in
* mode. The only XENIX mode bit supported is user write.
*
*Entry:
* _TSCHAR *path - file name
* int mode - mode to change to
*
*Exit:
* returns 0 if successful
* returns -1 and sets errno if not successful
*
*Exceptions:
*
*******************************************************************************/
int __cdecl _tchmod (
const _TSCHAR *path,
int mode
)
{
DWORD attr;
attr = GetFileAttributes((LPTSTR)path);
if (attr == 0xffffffff) {
/* error occured -- map error code and return */
_dosmaperr(GetLastError());
return -1;
}
if (mode & _S_IWRITE) {
/* clear read only bit */
attr &= ~FILE_ATTRIBUTE_READONLY;
}
else {
/* set read only bit */
attr |= FILE_ATTRIBUTE_READONLY;
}
/* set new attribute */
if (!SetFileAttributes((LPTSTR)path, attr)) {
/* error occured -- map error code and return */
_dosmaperr(GetLastError());
return -1;
}
return 0;
}
#else /* _MAC */
#include <cruntime.h>
#include <internal.h>
#include <io.h>
#include <sys\types.h>
#include <sys\stat.h>
#include <string.h>
#include <errno.h>
#include <macos\osutils.h>
#include <macos\files.h>
#include <macos\errors.h>
/***
*int _chmod(path, mode) - change file mode
*
*Purpose:
* Changes file mode permission setting to that specified in
* mode. The only XENIX mode bit supported is user write.
*
*Entry:
* char *path - file name
* int mode - mode to change to
*
*Exit:
* returns 0 if successful
* returns -1 and sets errno if not successful
*
*Exceptions:
*
*******************************************************************************/
int __cdecl _chmod (
const char *path,
int mode
)
{
HParamBlockRec hparamBlock;
char szPath[256];
OSErr osErr;
if (!*path)
{
errno = ENOENT;
return -1;
}
strcpy(szPath, path);
hparamBlock.fileParam.ioNamePtr = _c2pstr(szPath);
hparamBlock.fileParam.ioVRefNum = 0;
hparamBlock.fileParam.ioDirID = 0;
if (mode & _S_IWRITE) {
/* clear read only/locked bit */
osErr = PBHRstFLockSync(&hparamBlock);
}
else {
/* set read only/locked bit */
osErr = PBHSetFLockSync(&hparamBlock);
}
if (osErr)
{
_dosmaperr(osErr);
return -1;
}
return 0;
}
#endif /* _MAC */