tools/regression/nfsmmap/test1/test1.c

   1 /*
   2  * $DragonFly: src/tools/regression/nfsmmap/test1/test1.c,v 1.2 2003/11/07 14:38:38 eirikn Exp $
   3  */
   4
   5 #include <sys/types.h>
   6 #include <sys/fcntl.h>
   7 #include <sys/mman.h>
   8 #include <unistd.h>
   9
  10 int main(int argc, char** argv)
  11 {
  12     int fd, fd2;
  13     caddr_t addr;
  14     char zeros[4096];
  15     char ones[200];
  16
  17     memset(zeros, 0, sizeof zeros);
  18     memset(ones, 1, sizeof ones);
  19 #if 0
  20     unlink("test1.data");
  21     fd = open("test1.data", O_RDWR|O_CREAT, 0666);
  22     if (fd < 0)
  23         err(1, "creating file");
  24     if (write(fd, zeros, sizeof zeros) < 0)
  25         err(1, "writing zeros");
  26     close(fd);
  27 #endif
  28
  29     fd = open("test1.data", O_RDWR);
  30     if (fd < 0)
  31         err(1, "opening file");
  32     if (lseek(fd, 600, SEEK_SET) < 0)
  33         err(1, "seeking");
  34
  35     if (write(fd, ones, sizeof ones) < 0)
  36         err(1, "writing ones");
  37
  38     fsync(fd);
  39
  40     addr = mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
  41     if (addr == MAP_FAILED)
  42         err(1, "mapping");
  43     unlink("test1.scratch");
  44     fd2 = open("test1.scratch", O_RDWR|O_CREAT, 0666);
  45     if (fd2 < 0)
  46         err(1, "creating scratch");
  47
  48     if (write(fd2, addr, 4096) < 0)
  49         err(1, "writing scratch");
  50 }