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

int main(int argc, char **argv)
{
     char *line;
     FILE *input;
     char **buffer;
     int lines, i;

     if (argv[1]) {
	  input = fopen(argv[1], "r");
	  if (!input)
	       exit(1);
     } else {
	  input = stdin;
     }

     line = (char *) calloc(81, sizeof(char));
     lines = 0;
     buffer = (char **) calloc(1, sizeof(char *));

     while (fgets(line, 81, input)) {
	  char **tmp;
	  buffer[lines] = calloc(81, sizeof(char));
	  strncpy(buffer[lines], line, 80);
	  printf("Got and copied line %s\n", buffer[lines]);

	  tmp = (char **) realloc((void *) buffer,
				     sizeof(char *) * ++lines);
	  if (!buffer) {
	       perror("realloc error");
	       exit(1);
	  }

	  if (tmp != buffer)
	       buffer = tmp;
     }

     printf("Regurgitating...\n");
     for (i = 0; i < lines; i++)
	  printf("%s\n", buffer[i]);

     return 0;
}