[SOLVED] CS /* Uses a memory mapping to read a file. */

/* Uses a memory mapping to read a file. */

#include
#include
#include tests/vm/sample.inc
#include tests/lib.h
#include tests/main.h

void
test_main (void)
{
char *actual = (char *) 0x10000000;
int handle;
mapid_t map;
size_t i;

CHECK ((handle = open (sample.txt)) > 1, open sample.txt);
CHECK ((map = mmap (handle, actual)) != MAP_FAILED, mmap sample.txt);

/* Check that data is correct. */
if (memcmp (actual, sample, strlen (sample)))
fail (read of mmapd file reported bad data);

/* Verify that data is followed by zeros. */
for (i = strlen (sample); i < 4096; i++)if (actual[i] != 0)fail (“byte %zu of mmap’d region has value %02hhx (should be 0)”,i, actual[i]);munmap (map);close (handle);}