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

void usage()
{
  fprintf(stderr, "tcut -s start_line [0] -e end_line [EOF] [filename]\n");
  exit(0);
}
    

int main(int argc, char **argv)
{
  int start = -1;
  int end = -1;
  int linenum = 0;

  FILE *fp;
  
  char c;
  
  while ((c = getopt(argc, argv, "s:e:")) != -1)
    {
      switch (c)
	{
	case 's':
	  if (sscanf(optarg, "%d", &start) != 1)
	    usage();
	  break;
	case 'e':
	  if (sscanf(optarg, "%d", &end) != 1)
	    usage();
	  break;
	}
    }
  
  if ( (start > end && start != -1 && end != -1) || (start < -1) || (end < -1) )
    usage();
  
  if ((argc - optind) > 0)
    fp = fopen(argv[optind], "r");
  else
    fp = stdin;
  
  while (fread(&c, 1, 1, fp) == 1)
    {
      if (linenum >= start)
	fwrite(&c, 1, 1, stdout);
      if (c == '\n')
	linenum++;
      if (end == linenum)
	break;
    }
}