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/*___INFO__MARK_BEGIN__*/
/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* the Sun Industry Standards Source License Version 1.2
*
* Sun Microsystems Inc., March, 2001
*
*
* Sun Industry Standards Source License Version 1.2
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.2 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://gridengine.sunsource.net/Gridengine_SISSL_license.html
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2001 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
************************************************************************/
/*___INFO__MARK_END__*/
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
#include "uti/sge_rmon.h"
#include "uti/sge_unistd.h"
#include "lock.h"
/*-------------------------------------------------------------
* Name: qmaster_lock
* Return: 0 if creation of file was successfull
* -1 if file couldn't be created
*-------------------------------------------------------------*/
int qmaster_lock(
char *file
) {
int fd;
DENTER(TOP_LAYER, "qmaster_lock");
fd = SGE_OPEN3(file, O_RDWR | O_CREAT | O_EXCL, 0600);
if (fd == -1) {
DEXIT;
return -1;
}
else {
close(fd);
DEXIT;
return 0;
}
}
/*-------------------------------------------------------------
* Name: qmaster_unlock
* Return: 0 if file could be unlinked
* -1 if file couldn't be unlinked
*-------------------------------------------------------------*/
int qmaster_unlock(
char *file
) {
int ret;
DENTER(TOP_LAYER, "qmaster_unlock");
ret = unlink(file);
DEXIT;
return ret;
}
/*-------------------------------------------------------------
* Name: isLocked
* Return: 1 if file exists
* 0 if file doesn't exist
*-------------------------------------------------------------*/
int isLocked(
char *file
) {
int ret;
SGE_STRUCT_STAT sb;
DENTER(TOP_LAYER, "isLocked");
ret = SGE_STAT(file, &sb);
ret = ret ? 0 : 1;
DEXIT;
return ret;
}
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