The Tor Browser: nsprpub/pr/tests/append.c@925c144e1f1f

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /*

     7 ** File:        append.c

     8 ** Description: Testing File writes where PR_APPEND was used on open

     9 **

    10 ** append attempts to verify that a file opened with PR_APPEND

    11 ** will always append to the end of file, regardless where the

    12 ** current file pointer is positioned. To do this, PR_Seek() is

    13 ** called before each write with the position set to beginning of

    14 ** file. Subsequent writes should always append.

    15 ** The file is read back, summing the integer data written to the

    16 ** file. If the expected result is equal, the test passes.

    17 **

    18 ** See BugSplat: 4090

    19 */

    20 #include "plgetopt.h"

    21 #include "nspr.h"

    23 #include <stdio.h>

    24 #include <stdlib.h>

    26 PRIntn  debug = 0;

    27 PRIntn  verbose = 0;

    28 PRBool  failedAlready = PR_FALSE;

    29 const PRInt32 addedBytes = 1000;

    30 const PRInt32   buf = 1; /* constant written to fd, addedBytes times */

    31 PRInt32         inBuf;   /* read it back into here */

    33 int main(int argc, char **argv)

    34 {

    35     PRStatus    rc;

    36     PRInt32     rv;

    37     PRFileDesc  *fd;

    38     PRIntn      i;

    39     PRInt32     sum = 0;

    41     {   /* Get command line options */

    42         PLOptStatus os;

    43         PLOptState *opt = PL_CreateOptState(argc, argv, "vd");

    45 	    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))

    46         {

    47 		    if (PL_OPT_BAD == os) continue;

    48             switch (opt->option)

    49             {

    50             case 'd':  /* debug */

    51                 debug = 1;

    52                 break;

    53             case 'v':  /* verbose */

    54                 verbose = 1;

    55                 break;

    56              default:

    57                 break;

    58             }

    59         }

    60 	    PL_DestroyOptState(opt);

    61     } /* end block "Get command line options" */

    62 /* ---------------------------------------------------------------------- */

    63     fd = PR_Open( "/tmp/nsprAppend", (PR_APPEND | PR_CREATE_FILE | PR_TRUNCATE | PR_WRONLY), 0666 );

    64     if ( NULL == fd )  {

    65         if (debug) printf("PR_Open() failed for writing: %d\n", PR_GetError());

    66         failedAlready = PR_TRUE;

    67         goto Finished;

    68     }

    70     for ( i = 0; i < addedBytes ; i++ ) {

    71         rv = PR_Write( fd, &buf, sizeof(buf));

    72         if ( sizeof(buf) != rv )  {

    73             if (debug) printf("PR_Write() failed: %d\n", PR_GetError());

    74             failedAlready = PR_TRUE;

    75             goto Finished;

    76         }

    77         rv = PR_Seek( fd, 0 , PR_SEEK_SET );

    78         if ( -1 == rv )  {

    79             if (debug) printf("PR_Seek() failed: %d\n", PR_GetError());

    80             failedAlready = PR_TRUE;

    81             goto Finished;

    82         }

    83     }

    84     rc = PR_Close( fd );

    85     if ( PR_FAILURE == rc ) {

    86         if (debug) printf("PR_Close() failed after writing: %d\n", PR_GetError());

    87         failedAlready = PR_TRUE;

    88         goto Finished;

    89     }

    90 /* ---------------------------------------------------------------------- */

    91     fd = PR_Open( "/tmp/nsprAppend", PR_RDONLY, 0 );

    92     if ( NULL == fd )  {

    93         if (debug) printf("PR_Open() failed for reading: %d\n", PR_GetError());

    94         failedAlready = PR_TRUE;

    95         goto Finished;

    96     }

    98     for ( i = 0; i < addedBytes ; i++ ) {

    99         rv = PR_Read( fd, &inBuf, sizeof(inBuf));

   100         if ( sizeof(inBuf) != rv)  {

   101             if (debug) printf("PR_Write() failed: %d\n", PR_GetError());

   102             failedAlready = PR_TRUE;

   103             goto Finished;

   104         }

   105         sum += inBuf;

   106     }

   108     rc = PR_Close( fd );

   109     if ( PR_FAILURE == rc ) {

   110         if (debug) printf("PR_Close() failed after reading: %d\n", PR_GetError());

   111         failedAlready = PR_TRUE;

   112         goto Finished;

   113     }

   114     if ( sum != addedBytes )  {

   115         if (debug) printf("Uh Oh! addedBytes: %d. Sum: %d\n", addedBytes, sum);

   116         failedAlready = PR_TRUE;

   117         goto Finished;

   118     }

   120 /* ---------------------------------------------------------------------- */

   121 Finished:

   122     if (debug || verbose) printf("%s\n", (failedAlready)? "FAILED" : "PASSED" );

   123     return( (failedAlready)? 1 : 0 );

   124 }  /* main() */

   126 /* append.c */

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