sys/arch/pmax/test/sum.c

   1 #include <sys/param.h>
   2 #include <sys/exec.h>
   3
   4 /*
   5  * Print simple check sum for text and data section.
   6  */
   7 void
   8 main(argc, argv)
   9         int argc;
  10         char **argv;
  11 {
  12         register int fd, i, n;
  13         char *fname;
  14         struct coff_exec ex;
  15         int tsum, dsum, word;
  16
  17         if (argc < 2) {
  18                 printf("usage: sum <file>\n");
  19                 goto err;
  20         }
  21         if ((fd = open(fname = argv[1], 0)) < 0)
  22                 goto err;
  23
  24         /* read the COFF header */
  25         i = read(fd, (char *)&ex, sizeof(ex));
  26         if (i != sizeof(ex) || COFF_BADMAG(ex)) {
  27                 printf("No COFF header\n");
  28                 goto cerr;
  29         }
  30         if (lseek(fd, COFF_TEXTOFF(ex), 0)) {
  31                 perror("lseek");
  32                 goto cerr;
  33         }
  34         tsum = 0;
  35         for (n = ex.aouthdr.tsize; n > 0; n -= sizeof(int)) {
  36                 if (read(fd, &word, sizeof(word)) != sizeof(word)) {
  37                         perror("read text");
  38                         goto cerr;
  39                 }
  40                 tsum += word;
  41         }
  42         dsum = 0;
  43         for (n = ex.aouthdr.dsize; n > 0; n -= sizeof(int)) {
  44                 if (read(fd, &word, sizeof(word)) != sizeof(word)) {
  45                         perror("read data");
  46                         goto cerr;
  47                 }
  48                 dsum += word;
  49         }
  50         printf("tsum %d dsum %d\n", tsum, dsum);
  51
  52 cerr:
  53         close(fd);
  54 err:
  55         exit(0);
  56 }