CS代考计算机代写 /* Tests that seeking past the end of a file and writing will

/* Tests that seeking past the end of a file and writing will
properly zero out the region in between. */

#include
#include “tests/lib.h”
#include “tests/main.h”

static char buf[76543];

void
test_main (void)
{
const char *file_name = “testfile”;
char zero = 0;
int fd;

CHECK (create (file_name, 0), “create ”%s””, file_name);
CHECK ((fd = open (file_name)) > 1, “open ”%s””, file_name);
msg (“seek ”%s””, file_name);
seek (fd, sizeof buf – 1);
CHECK (write (fd, &zero, 1) > 0, “write ”%s””, file_name);
msg (“close ”%s””, file_name);
close (fd);
check_file (file_name, buf, sizeof buf);
}