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/*

 *  A test support function which performs a write() and

 *  handles implied open(), lseek(), write(), and close() operations.

 *

 *  $Id: test_write.c,v 1.2 2001-09-27 12:02:25 chris Exp $

 */

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <unistd.h>

#include <errno.h>

#include <string.h>

#include <assert.h>

/*

 *  test_write routine

 */

void test_write(

  char   *file,

  off_t  offset,

  char  *buffer

)

{

  int   fd;

  int   status;

  int   length;

  length = strlen( buffer );

  fd = open( file, O_WRONLY );

  if ( fd == -1 ) {

    printf( "test_write: open( %s ) failed : %s\n", file, strerror( errno ) );

    exit( 0 );

  }

  status = lseek( fd, offset, SEEK_SET );

  assert( status != -1 );

  status = write( fd, buffer, length );

  if ( status == -1 ) {

    printf( "test_write: write( %s ) failed : %s\n", file, strerror( errno ) );

    exit( 0 );

  }

  if ( status != length ) {

    printf( "test_write: write( %s ) only wrote %d of %d bytes\n",

            file, status, length );

    exit( 0 );

  }

  status = close( fd );

  assert( !status );

}