#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <wordexp.h>
#include <sys/file.h>
#include <sys/ioctl.h>

int
main()
{
  /* Skipping error checks for simplicity. The real file has error checks. */

  /* All but the last two lines before the return statement are about parsing MAKEFLAGS.
     The parsing works fine, it's only the last two lines that aren't working the way I
     expected. */

  size_t jobs;
  wordexp_t args;
  long pid=(long)getpid();
  int i, read_fd=-1, write_fd=-1, tokencount=0;
  char *makecommand, *makeflags=getenv("MAKEFLAGS");

  printf("MAKEFLAGS: %s\n", makeflags);

  makecommand=malloc(strlen(makeflags)+3);
  strcpy(makecommand, "a ");
  strcat(makecommand, makeflags);

  wordexp(makecommand, &args, 0);
  free(makecommand);

  opterr=0;
  while(1)
    {
    static struct option long_options[] =
      {
      {"jobserver-auth", optional_argument, 0, 0},
      {0, 0, 0, 0}
      };

    int option_index=0;
    i = getopt_long(args.we_wordc, args.we_wordv, "j::",
                    long_options, &option_index);

    if(i==-1) break;

    switch(i)
      {
      case 0:
          sscanf(optarg, "%d,%d", &read_fd, &write_fd);
          break;

      case 'j':
          if(optarg==NULL) jobs=8;
          else sscanf(optarg, "%zu", &jobs);
          break;

      default:
          break;
      }
    }

  wordfree(&args);
  printf("jobs: %zu, read_fd: %d, write_fd: %d\n", jobs, read_fd, write_fd);



  ioctl(read_fd, FIONREAD, &tokencount);
  printf("token count: %d\n", tokencount);

  return 0;
}