4854 printf(1) doesn't support %b and \c properly

*** 90,100 ****
  
  int
  main(int argc, char *argv[])
  {
          size_t len;
!         int chopped, end, rval;
          char *format, *fmt, *start;
  
          (void) setlocale(LC_ALL, "");
  
          argv++;
--- 90,100 ----
  
  int
  main(int argc, char *argv[])
  {
          size_t len;
!         int end, rval;
          char *format, *fmt, *start;
  
          (void) setlocale(LC_ALL, "");
  
          argv++;
*** 122,132 ****
           * format strings are reused as necessary to use up the provided
           * arguments, arguments of zero/null string are provided to use
           * up the format string.
           */
          fmt = format = *argv;
!         chopped = escape(fmt, 1, &len);         /* backslash interpretation */
          rval = end = 0;
          gargv = ++argv;
  
          for (;;) {
                  maxargv = gargv;
--- 122,132 ----
           * format strings are reused as necessary to use up the provided
           * arguments, arguments of zero/null string are provided to use
           * up the format string.
           */
          fmt = format = *argv;
!         (void) escape(fmt, 1, &len);    /* backslash interpretation */
          rval = end = 0;
          gargv = ++argv;
  
          for (;;) {
                  maxargv = gargv;
*** 160,170 ****
                  if (end == 1) {
                          warnx1(_("missing format character"), NULL, NULL);
                          return (1);
                  }
                  (void) fwrite(start, 1, PTRDIFF(fmt, start), stdout);
!                 if (chopped || !*gargv)
                          return (rval);
                  /* Restart at the beginning of the format string. */
                  fmt = format;
                  end = 1;
          }
--- 160,170 ----
                  if (end == 1) {
                          warnx1(_("missing format character"), NULL, NULL);
                          return (1);
                  }
                  (void) fwrite(start, 1, PTRDIFF(fmt, start), stdout);
!                 if (!*gargv)
                          return (rval);
                  /* Restart at the beginning of the format string. */
                  fmt = format;
                  end = 1;
          }
*** 336,352 ****
                  if (p == NULL) {
                          warnx2("%s", strerror(ENOMEM), NULL);
                          return (NULL);
                  }
                  getout = escape(p, 0, &len);
!                 *(fmt - 1) = 's';
!                 PF(start, p);
!                 *(fmt - 1) = 'b';
                  free(p);
  
                  if (getout)
!                         return (fmt);
                  break;
          }
          case 'c': {
                  char p;
  
--- 336,350 ----
                  if (p == NULL) {
                          warnx2("%s", strerror(ENOMEM), NULL);
                          return (NULL);
                  }
                  getout = escape(p, 0, &len);
!                 (void) fputs(p, stdout);
                  free(p);
  
                  if (getout)
!                         exit(*rval);
                  break;
          }
          case 'c': {
                  char p;
  
*** 454,466 ****
--- 452,468 ----
                          break;
                  case 'b':               /* backspace */
                          *store = '\b';
                          break;
                  case 'c':
+                         if (!percent) {
                                  *store = '\0';
                                  *len = PTRDIFF(store, save);
                                  return (1);
+                         }
+                         *store = 'c';
+                         break;
                  case 'f':               /* form-feed */
                          *store = '\f';
                          break;
                  case 'n':               /* newline */
                          *store = '\n';