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/***
*access.c - OS/2 access function
*
* Copyright (c) 1989-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* This file has the _access() function which checks on file accessability.
*
*Revision History:
* 06-06-89 PHG Module created, based on asm version
* 11-10-89 JCR Replaced DOS32QUERYFILEMODE with DOS32QUERYPATHINFO
* 03-07-90 GJF Made calling type _CALLTYPE2 (for now), added #include
* <cruntime.h>, fixed copyright and fixed compiler
* warnings. Also, cleaned up the formatting a bit.
* 03-30-90 GJF Now _CALLTYPE1.
* 07-24-90 SBM Removed '32' from API names
* 09-27-90 GJF New-style function declarator.
* 12-04-90 SRW Changed to include <oscalls.h> instead of <doscalls.h>
* 12-06-90 SRW Added _CRUISER_ and _WIN32 conditionals.
* 01-16-91 GJF ANSI naming.
* 04-09-91 PNT Added _MAC_ conditional
*
*******************************************************************************/
#include <cruntime.h>
#include <io.h>
#include <oscalls.h>
#include <stdlib.h>
#include <errno.h>
#include <msdos.h>
#include <internal.h>
/***
*int _access(path, amode) - check whether file can be accessed under mode
*
*Purpose:
* Checks to see if the specified file exists and can be accessed
* in the given mode.
*
*Entry:
* char *path - pathname
* int amode - access mode
* (0 = exist only, 2 = write, 4 = read, 6 = read/write)
*
*Exit:
* returns 0 if file has given mode
* returns -1 and sets errno if file does not have given mode or
* does not exist
*
*Exceptions:
*
*******************************************************************************/
int _CALLTYPE1 _access (
const char *path,
int amode
)
{
#ifdef _CRUISER_
FILESTATUS fs;
ULONG dosretval;
/* ask OS/2 about the file mode */
if (dosretval = DOSQUERYPATHINFO((char *)path, 1, &fs, sizeof(fs))) {
/* error occured -- map error code and return */
_dosmaperr(dosretval);
return -1;
}
/* no error; see if returned premission settings OK */
if (fs.attrFile & FILE_READONLY
#else /* ndef _CRUISER_ */
#ifdef _WIN32_
DWORD attr;
attr = GetFileAttributes((LPSTR)path);
if (attr == 0xffffffff) {
/* error occured -- map error code and return */
_dosmaperr(GetLastError());
return -1;
}
/* no error; see if returned premission settings OK */
if (attr & FILE_ATTRIBUTE_READONLY
#else /* ndef _WIN32_ */
#ifdef _MAC_
TBD();
if (0
#else /* ndef _MAC_ */
#error ERROR - ONLY CRUISER, WIN32, OR MAC TARGET SUPPORTED!
#endif /* _MAC_ */
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
&& (amode & 2)) {
/* no write permission on file, return error */
errno = EACCES;
_doserrno = E_access;
return -1;
}
else
/* file exists and has requested permission setting */
return 0;
}
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