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//==========================================================================

//

//      ramfs2.c

//

//      Test fseek on a filesystem

//

//==========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####                                            

// -------------------------------------------                              

// This file is part of eCos, the Embedded Configurable Operating System.   

// Copyright (C) 2004 Free Software Foundation, Inc.                        

//

// eCos is free software; you can redistribute it and/or modify it under    

// the terms of the GNU General Public License as published by the Free     

// Software Foundation; either version 2 or (at your option) any later      

// version.                                                                 

//

// eCos is distributed in the hope that it will be useful, but WITHOUT      

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    

// for more details.                                                        

//

// You should have received a copy of the GNU General Public License        

// along with eCos; if not, write to the Free Software Foundation, Inc.,    

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            

//

// As a special exception, if other files instantiate templates or use      

// macros or inline functions from this file, or you compile this file      

// and link it with other works to produce a work based on this file,       

// this file does not by itself cause the resulting work to be covered by   

// the GNU General Public License. However the source code for this file    

// must still be made available in accordance with section (3) of the GNU   

// General Public License v2.                                               

//

// This exception does not invalidate any other reasons why a work based    

// on this file might be covered by the GNU General Public License.         

// -------------------------------------------                              

// ####ECOSGPLCOPYRIGHTEND####                                              

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):           asl

// Contributors:        asl

// Date:                2004-03-29

// Purpose:             Test fseek on a filesystem

// Description:         This test uses the ramfs to check out the fseek

//                      operation on a filesystem.

//                      

//                      

//                      

//                      

//                      

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <stdio.h>

#include <unistd.h>

#include <fcntl.h>

#include <errno.h>

#include <string.h>

#include <cyg/fileio/fileio.h>

#include <cyg/infra/testcase.h>

#include <cyg/infra/diag.h>            // HAL polled output

//==========================================================================

#define SHOW_RESULT( _fn, _res ) \

diag_printf("FAIL: " #_fn "() returned %ld %s\n", (long)_res, _res<0?strerror(errno):"");

//==========================================================================

char buf[1024];

char buf1[1024];

//==========================================================================

// main

int main( int argc, char **argv )

{

    int err;

    FILE *stream;

    long pos;

    int i;

    CYG_TEST_INIT();

    // --------------------------------------------------------------

    CYG_TEST_INFO("mount /");

    err = mount( "", "/", "ramfs" );

    if( err < 0 ) SHOW_RESULT( mount, err );

    CYG_TEST_INFO("creating /fseek");

    stream = fopen("/fseek","w+");

    if (!stream) {

      diag_printf("FAIL: fopen() returned NULL, %s\n", strerror(errno));

      CYG_TEST_FINISH("done");          \

    }

    /* Write a buffer full of cyclic numbers */

    for (i = 0; i < sizeof(buf); i++) {

      buf[i] = i % 256;

    }

    CYG_TEST_INFO("writing test pattern");

    err=fwrite(buf,sizeof(buf), 1, stream);

    if ( err < 0 ) SHOW_RESULT( fwrite, err );

    /* The current position should be the same size as the buffer */

    pos = ftell(stream);

    if (pos < 0) SHOW_RESULT( ftell, pos );

    if (pos != sizeof(buf))

      diag_printf("<FAIL>: ftell is not telling the truth.");

    CYG_TEST_INFO("fseek()ing to beginning and writing");

    /* Seek back to the beginning of the file */

    err = fseek(stream, 0, SEEK_SET);

    if ( err < 0 ) SHOW_RESULT( fwrite, err );

    pos = ftell(stream);

    if (pos < 0) SHOW_RESULT( ftell, pos );

    if (pos != 0) CYG_TEST_FAIL("ftell is not telling the truth");

    /* Write 4 zeros to the beginning of the file */

    for (i = 0; i < 4; i++) {

      buf[i] = 0;

    }

    err = fwrite(buf, 4, 1, stream);

    if ( err < 0 ) SHOW_RESULT( fwrite, err );

    /* Check the pointer is at 4 */

    pos = ftell(stream);

    if (pos < 0) SHOW_RESULT( ftell, pos );

    if (pos != 4)  CYG_TEST_FAIL("ftell is not telling the truth");

    CYG_TEST_INFO("closing file");

    /* Close the file, open it up again and read it back */

    err = fclose(stream);

    if (err != 0) SHOW_RESULT( fclose, err );

    CYG_TEST_INFO("open file /fseek");

    stream = fopen("/fseek", "r+");

    if (!stream) {

      diag_printf("<FAIL>: fopen() returned NULL, %s\n", strerror(errno));

    }

    err = fread(buf1,sizeof(buf1),1, stream);

    if (err != 1) SHOW_RESULT( fread, err );

    CYG_TEST_INFO("Comparing contents");

    if (memcmp(buf, buf1, sizeof(buf1))) {

      CYG_TEST_FAIL("File contents inconsistent");

    }

    err = fclose(stream);

    if (err != 0) SHOW_RESULT( fclose, err );

    CYG_TEST_INFO("open file /fseek");

    stream = fopen("/fseek", "r+");

    if (!stream) {

      diag_printf("<FAIL>: fopen() returned NULL, %s\n", strerror(errno));

    }

    CYG_TEST_INFO("fseek()ing past the end to create a hole");

    /* Seek 1K after the end of the file */

    err = fseek(stream, sizeof(buf), SEEK_END);

    if ( err < 0 ) SHOW_RESULT( fseek, err );

    pos = ftell(stream);

    if (pos < 0) SHOW_RESULT( ftell, pos );

    if (pos != (2*sizeof(buf))) CYG_TEST_FAIL("ftell is not telling the truth");

    CYG_TEST_INFO("writing test pattern");

    err=fwrite(buf,sizeof(buf), 1, stream);

    if ( err < 0 ) SHOW_RESULT( fwrite, err );

    pos = ftell(stream);

    if (pos < 0) SHOW_RESULT( ftell, pos );

    if (pos != (3*sizeof(buf))) CYG_TEST_FAIL("ftell is not telling the truth");

    CYG_TEST_INFO("closing file");

    err = fclose(stream);

    if (err != 0) SHOW_RESULT( fclose, err );

    CYG_TEST_INFO("open file /fseek");

    stream = fopen("/fseek", "r+");

    if (!stream) {

      diag_printf("<FAIL>: fopen() returned NULL, %s\n", strerror(errno));

    }

    err = fread(buf1,sizeof(buf1),1, stream);

    if (err != 1) SHOW_RESULT( fread, err );

    CYG_TEST_INFO("Comparing contents");

    if (memcmp(buf, buf1, sizeof(buf1))) {

      CYG_TEST_FAIL("File contents inconsistent");

    }

    err = fread(buf1,sizeof(buf1),1, stream);

    if (err != 1) SHOW_RESULT( fread, err );

    for (i = 0; i< sizeof(buf); i++) {

      if (buf1[i] != 0)

        CYG_TEST_FAIL("Hole does not contain zeros");

    }

    err = fread(buf1,sizeof(buf1),1, stream);

    if (err != 1) SHOW_RESULT( fread, err );

    if (memcmp(buf, buf1, sizeof(buf1))) {

      CYG_TEST_FAIL("File contents inconsistent");

    }

    CYG_TEST_INFO("closing file");

    /* Close the file */

    err = fclose(stream);

    if (err != 0) SHOW_RESULT( fclose, err );

    CYG_TEST_INFO("umount /");

    err = umount( "/" );

    if( err < 0 ) SHOW_RESULT( umount, err );

    CYG_TEST_PASS_FINISH("ramfs2");

}