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/* Writes to a file through a mapping, and unmaps the file,
then reads the data in the file back using the read system
call to verify. */
#include <string.h>
#include <syscall.h>
#include "tests/vm/sample.inc"
#include "tests/lib.h"
#include "tests/main.h"
#define ACTUAL ((void *) 0x10000000)
void
test_main (void)
{
int handle;
mapid_t map;
char buf[1024];
/* Write file via mmap. */
CHECK (create ("sample.txt", strlen (sample)), "create \"sample.txt\"");
CHECK ((handle = open ("sample.txt")) > 1, "open \"sample.txt\"");
CHECK ((map = mmap (handle, ACTUAL)) != MAP_FAILED, "mmap \"sample.txt\"");
memcpy (ACTUAL, sample, strlen (sample));
munmap (map);
/* Read back via read(). */
read (handle, buf, strlen (sample));
CHECK (!memcmp (buf, sample, strlen (sample)),
"compare read data against written data");
close (handle);
}
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