Re-exec after splitting argv[1] by spaces (/usr/bin/env replacement that 'works')

binenv.c

#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

#define MAX_ARGS 255

int main(const int argc, char** argv) {
  const char delimiters[] = " ";
  char *args[MAX_ARGS], *running, *token;
  int c, i;

  running = argv[1];
  for ( c = 0; (token = strsep(&running, delimiters)) != NULL; ) {
    args[c++] = token;
  }
  for ( i = 2; i < argc; ) {
    args[c++] = argv[i++];
  }
  args[c] = NULL;
  execvp(args[0], args);
  printf("%s: %s\n", argv[0], strerror(errno));
  return errno;
}