op_excl.c

Netscape NSPR库源码

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
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 * 
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 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is the Netscape Portable Runtime (NSPR).
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are 
 * Copyright (C) 1998-2000 Netscape Communications Corporation.  All
 * Rights Reserved.
 * 
 * Contributor(s):
 * 
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 * terms of the GNU General Public License Version 2 or later (the
 * "GPL"), in which case the provisions of the GPL are applicable 
 * instead of those above.  If you wish to allow use of your 
 * version of this file only under the terms of the GPL and not to
 * allow others to use your version of this file under the MPL,
 * indicate your decision by deleting the provisions above and
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 * the GPL.  If you do not delete the provisions above, a recipient
 * may use your version of this file under either the MPL or the
 * GPL.
 */

/***********************************************************************
**
** Name: op_excl.c
**
** Description: Test Program to verify function of PR_EXCL open flag
**
** Modification History:
** 27-Oct-1999 lth. Initial version
***********************************************************************/

#include <plgetopt.h> 
#include <nspr.h> 
#include <stdio.h>
#include <stdlib.h>

/*
** Test harness infrastructure
*/
PRLogModuleInfo *lm;
PRLogModuleLevel msgLevel = PR_LOG_NONE;
PRIntn  debug = 0;
PRUint32  failed_already = 0;
/* end Test harness infrastructure */
/*
** Emit help text for this test
*/
static void Help( void )
{
    printf("op_excl: Help");
    printf("op_excl [-d]");
    printf("-d enables debug messages");
    exit(1);
} /* end Help() */



PRIntn main(PRIntn argc, char *argv[])
{
    PRFileDesc  *fd;
    PRStatus    rv;
    PRInt32     written;
    char        outBuf[] = "op_excl.c test file";
#define OUT_SIZE sizeof(outBuf)
#define NEW_FILENAME "xxxExclNewFile"

    {
        /*
        ** Get command line options
        */
        PLOptStatus os;
        PLOptState *opt = PL_CreateOptState(argc, argv, "hd");

	    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
        {
		    if (PL_OPT_BAD == os) continue;
            switch (opt->option)
            {
            case 'd':  /* debug */
                debug = 1;
			    msgLevel = PR_LOG_ERROR;
                break;
            case 'h':  /* help message */
			    Help();
                break;
             default:
                break;
            }
        }
	    PL_DestroyOptState(opt);
    }

    lm = PR_NewLogModule("Test");       /* Initialize logging */

    /*
    ** First, open a file, PR_EXCL, we believe not to exist
    */
    fd = PR_Open( NEW_FILENAME, PR_CREATE_FILE | PR_EXCL | PR_WRONLY, 0666 );
    if ( NULL == fd )  {
        if (debug) fprintf( stderr, "Open exclusive. Expected success, got failure\n");
        failed_already = 1;
        goto Finished;
    }

    written = PR_Write( fd, outBuf, OUT_SIZE );
    if ( OUT_SIZE != written )  {
        if (debug) fprintf( stderr, "Write after open exclusive failed\n");
        failed_already = 1;
        goto Finished;
    }

    rv = PR_Close(fd);
    if ( PR_FAILURE == rv )  {
        if (debug) fprintf( stderr, "Close after open exclusive failed\n");
        failed_already = 1;
        goto Finished;
    }

    /*
    ** Second, open the same file, PR_EXCL, expect it to fail
    */
    fd = PR_Open( NEW_FILENAME, PR_CREATE_FILE | PR_EXCL | PR_WRONLY, 0666 );
    if ( NULL != fd )  {
        if (debug) fprintf( stderr, "Open exclusive. Expected failure, got success\n");
        failed_already = 1;
        PR_Close(fd);
    }

    rv = PR_Delete( NEW_FILENAME );
    if ( PR_FAILURE == rv ) {
        if (debug) fprintf( stderr, "PR_Delete() failed\n");
        failed_already = 1;
    }

Finished:
    if (debug) printf("%s\n", (failed_already)? "FAIL" : "PASS");
    return( (failed_already == PR_TRUE )? 1 : 0 );
}  /* main() */
/* end op_excl.c */