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/*
* 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.
*
* $Id$
*/
#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 <assert.h>
#include <pmacros.h>
/*
* 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 );
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 );
assert( !status );
}
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