usr.sbin/sup/source/cvt.c

   1 /*      $NetBSD: cvt.c,v 1.2 1997/06/17 18:56:10 christos Exp $ */
   2
   3 /*
   4  * Quick hack to convert old binary sup when.collection files into
   5  * the new ascii format.
   6  */
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <fcntl.h>
  11
  12 int
  13 main(int argc, char **argv)
  14 {
  15         long b;
  16         FILE *fp;
  17         int fd;
  18
  19         if (argc != 2) {
  20                 (void) fprintf(stderr, "Usage: %s <filename>\n", argv[0]);
  21                 return 1;
  22         }
  23
  24         if ((fd = open(argv[1], O_RDWR)) == -1) {
  25                 perror("open");
  26                 return 1;
  27         }
  28
  29         if (read(fd, &b, sizeof(b)) != sizeof(b)) {
  30                 perror("read");
  31                 return 1;
  32         }
  33
  34         if (lseek(fd, 0, SEEK_SET) == -1) {
  35                 perror("lseek");
  36                 return 1;
  37         }
  38
  39         (void) close(fd);
  40
  41         if ((fp = fopen(argv[1], "w")) == NULL) {
  42                 perror("fopen");
  43                 return 1;
  44         }
  45
  46         if (fprintf(fp, "%ld\n", b) < 0) {
  47                 perror("fprintf");
  48                 return 1;
  49         }
  50         if (fclose(fp) != 0) {
  51                 perror("fclose");
  52                 return 1;
  53         }
  54
  55         return 0;
  56 }