Another one, print bits of file.. ascii

Another one, print bits of file.. ascii

#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>

#define PACKAGE "dbits"
#define VERSION "0.0.1"

/* status epilepticus, print help and exit with exval */
void print_help(int exval);
/* print version and exit with exval */
void print_version(int exval);

int main(int argc, char *argv[]) {
 FILE *fp = NULL;
 char byte;
 char dlmt = ' ';
 int opt, bit, width, x;
 int max_width = 8;

 opt = bit = width = x = 0;

 /* any options given ? */
 if(argc == 1)
  print_help(1);

 /* option parser */
 while((opt = getopt(argc, argv, "hvw:d:")) != -1) {
  switch(opt) {
   case 'h': /* print this help and exit */
    print_help(0);
   case 'v': /* print program version and exit */
    print_version(0);
   case 'w': /* set width to INT */
    max_width = strtol(optarg, (char **)NULL, 10);
    break;
   case 'd': /* delimit bits with.. `dlmnt' */
    sscanf(optarg, "%c", &dlmt);
    break;
   case '?': /* no such option */
    fprintf(stderr, "%s: Error - No such option: `%c'\n\n", PACKAGE, optopt);
    print_help(1);
   case ':': /* option needs an argument */
    fprintf(stderr, "%s: Error - option `%c' needs an argument\n\n", PACKAGE, optopt);
    print_help(1);
  }
 }

  /* there should be one remaining argument left, `FILE' */
  if((argc - optind) == 0) {
   fprintf(stderr, "%s: Error - Missing input file\n", PACKAGE);
   return 1;
  }

 /* open & read file */
 if((fp = fopen(argv[optind], "r")) == NULL) {
  fprintf(stderr, "%s: Error - fopen(%s)\n", PACKAGE, argv[optind]);
  return 1;
 }

 /* get bits... */
 while(!feof(fp)) {
  /* read one byte */
  fread(&byte, 1, 1, fp);

  /* iterate thru the 8 bits */
  for(bit = 0; bit < 8; bit++) {
   /* get least significant bit */
   x = byte & 0x01;
   printf("%d", x);
   /* shift right */
   byte = byte >> 1;
  }
  printf("%c", dlmt), width++;
  if(width >= max_width)
   printf("\n"), width = 0;
 }

 /* done.. */
 printf("\n");
 fclose(fp);
 return 0;
}

/* status epilepticus, print help and exit with exval */
void print_help(int exval) {
 printf("%s,%s dump bits\n", PACKAGE, VERSION);
 printf("Usage: %s [-h] [-v] [-w INT] [-d CHAR] FILE\n\n", PACKAGE);

 printf(" -h      print this help and exit\n");
 printf(" -v      print version and exit\n");
 printf(" -w INT  set width to `INT', default=8\n");
 printf(" -d CHAR delimit bits by `CHAR', default=\\040\n\n");

 exit(exval);
}

/* print version and exit with exval */
void print_version(int exval) {

 exit(exval);
}