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Properly convert epicsTempFile to old-style C

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This commit is contained in:
Andrew Johnson
2020-03-04 21:49:17 -06:00
parent fdacb6b92e
commit 227a749105
1 changed files with 37 additions and 40 deletions
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modules/libcom/src/osi/os/WIN32/epicsTempFile.c
+37 -40
View File
@@ -3,13 +3,12 @@
* National Laboratory.
* Copyright (c) 2002 The Regents of the University of California, as
* Operator of Los Alamos National Laboratory.
* EPICS BASE Versions 3.13.7
* and higher are distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution.
* EPICS BASE is distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution.
\*************************************************************************/
/*
* Author: Jeff Hill
* Author: Jeff Hill
*/
#include <stdlib.h>
@@ -21,43 +20,41 @@
#define epicsExportSharedSymbols
#include "epicsTempFile.h"
//
// epicsTmpFile
//
// allow the teporary file directory to be set with the
// TMP environment varianble
//
/*
* epicsTmpFile
*
* allow the teporary file directory to be set with the
* TMP environment varianble
*/
epicsShareFunc FILE * epicsShareAPI epicsTempFile ()
{
char * pName = _tempnam ( "c:\\tmp", "epics" );
if( ! pName ) {
return 0;
char * pName = _tempnam("c:\\tmp", "epics");
if (pName) {
/* We use open followed by fdopen so that the _O_EXCL
* flag can be used. This causes detection of a race
* condition where two programs end up receiving the
* same temporary file name.
*
* _O_CREAT create if non-existant
* _O_EXCL file must not exist
* _O_RDWR read and write the file
* _O_TEMPORARY delete file on close
* _O_BINARY no translation
* _O_SHORT_LIVED avoid flush to disk
*/
int openFlag = _O_CREAT | _O_EXCL | _O_RDWR |
_O_SHORT_LIVED | _O_BINARY | _O_TEMPORARY;
int fd = open(pName, openFlag, _S_IWRITE);
FILE * pNewFile = 0;
if (fd >=0) {
pNewFile = _fdopen(fd, "w+b");
}
else {
printf("Temporary file \"%s\" open failed because "
"\"%s\"\n", pName, strerror(errno));
}
free(pName);
return pNewFile;
}
// We use open followed by fdopen so that the _O_EXCL
// flag can be used. This causes detection of a race
// condition where two programs end up receiving the
// same temporary file name.
//
// _O_CREAT create if non-existant
// _O_EXCL file must not exist
// _O_RDWR read and write the file
// _O_TEMPORARY delete file on close
// _O_BINARY no translation
// _O_SHORT_LIVED avoid flush to disk
//
int openFlag = _O_CREAT | _O_EXCL | _O_RDWR |
_O_SHORT_LIVED | _O_BINARY | _O_TEMPORARY;
int fd = open ( pName, openFlag, _S_IWRITE );
FILE * pNewFile = 0;
if ( fd >=0 ) {
pNewFile = _fdopen ( fd, "w+b" );
}
else {
printf (
"Temporary file \"%s\" open failed because "
"\"%s\"\n", pName, strerror ( errno ) );
}
free ( pName );
return pNewFile;
return 0;
}