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/**
* @file
*
* A test support function which extends the file to the specified
* length. This handles the implied open(), lseek(), write(), and close()
* operations.
*
* The defined behavior is a seek() followed by a write() extends the file
* and zero fills the new length part.
*/
/*
* COPYRIGHT (c) 1989-2012.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <ctype.h>
#include <pmacros.h>
/* forward declarations to avoid warnings */
void test_extend(char *file, off_t offset);
/*
* test_extend routine
*/
void test_extend(
char *file,
off_t offset
)
{
int fd;
int status;
char c = 0;
fd = open( file, O_WRONLY );
if ( fd == -1 ) {
printf( "test_extend: open( %s ) failed : %s\n", file, strerror( errno ) );
rtems_test_exit( 0 );
}
status = lseek( fd, offset - 1, SEEK_SET );
rtems_test_assert( status != -1 );
status = write( fd, &c, 1 );
if ( status == -1 ) {
printf( "test_extend: write( %s ) failed : %s\n", file, strerror( errno ) );
rtems_test_exit( 0 );
}
if ( status != 1 ) {
printf( "test_extend: write( %s ) only wrote %d of %d bytes\n",
file, status, 1 );
rtems_test_exit( 0 );
}
status = close( fd );
rtems_test_assert( !status );
}
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