kolibrios-gitea/programs/develop/open watcom/trunk/clib/streamio/tmputil.c

139 lines
4.1 KiB
C
Raw Normal View History

/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: Internal helper routines __MkTmpFile() and __RmTmpFile().
*
****************************************************************************/
#include "variety.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <direct.h>
#include <string.h>
#include <process.h>
#include "rtdata.h"
#include "tmpfname.h"
static unsigned __GetTmpPath( char *buf )
{
#ifndef __NETWARE__
static char *evars[] = { "TMP", "TEMP", "TMPDIR", "TEMPDIR", "" };
char **evar;
char *tmp;
#endif
unsigned i;
buf[0] = '\0'; // initialize path
#ifdef __NETWARE__
getcwd( buf, PATH_MAX ); // No environment vars on Netware
#else
for( evar = evars; **evar; ++evar ) {
tmp = getenv( *evar );
if( (tmp != NULL) && (strlen( tmp ) <= PATH_MAX) ) {
tmp = _fullpath( buf, tmp, PATH_MAX );
break;
}
}
/*
* If we didn't match on any environment vars, get current working dir
*/
if( buf[0] == '\0' ) {
getcwd( buf, PATH_MAX );
}
#endif
// if last char is not a path delimiter then append one
i = strlen( buf );
if( i > 0 ) i--;
if( (buf[i] != '\\') && (buf[i] != '/') ) {
// if buf[i] is a null char then the following has no effect as planned
i++;
buf[i] = '\\';
i++;
buf[i] = '\0';
}
return( i );
}
static char __hex( int num )
{
num += '0';
if( num > '9' ) {
num += 'a' - '0' - 10;
}
return( num );
}
#if defined( __NETWARE__ )
extern int GetThreadID( void );
#define getuniqueid() GetThreadID()
#elif defined( __NT__ )
#define getuniqueid() ((getpid() << 12) + *_threadid)
#elif defined( __OS2__ )
#define getuniqueid() ((getpid() << 12) + *_threadid)
#else
#define getuniqueid() (getpid())
#endif
void __MkTmpFile( char *buf, int num )
{
unsigned pid;
unsigned i;
char *ptr;
pid = getuniqueid();
// JBS on Win32 pid's range from 0 to n where n is not very large for
// most systems (e.g. 500 would indicate many, many processes are active).
// #if defined(__386__) || defined(__AXP__) || defined(__PPC__)
// // try to use more of the 32bit pid bits
// pid |= pid >> 16;
// #endif
i = __GetTmpPath( buf );
ptr = &buf[ i ];
ptr[0] = 't';
for( i = 7; i != 0; i-- ) { // JBS use 7 hex digits instead of 4
ptr[i] = __hex( pid & 0x000F );
pid = pid >> 4;
}
ptr[8] = '.';
ptr[9] = 't';
ptr[10] = __hex( (num >> 4) & 0x000F );
ptr[11] = __hex( num & 0x000F );
ptr[12] = '\0';
}
void __RmTmpFile( FILE *fp )
{
char name[PATH_MAX + _TMPFNAME_LENGTH + 1]; /* 02-aug-90 */
__MkTmpFile( name, _FP_TMPFCHAR(fp) );
remove( name );
}