/*
 * Looking at problem 3.43 in the Computer Systems textbook.
   
   $ gcc -D_FORTIFY_SOURCE=2 -fno-stack-protector -m32 -O0 -o 3p43 3p43.c 
   /tmp/ccPBLyQ7.o: In function `my_getline':
   3p43.c:(.text+0x7d): warning: the `gets' function is dangerous and should not be used.
   $ ./3p43
   Type something. 
   012345678901234567890123
   You said '01234567Àüà67890123'
   Segmentation fault

 *
 */

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

void trim(char* text){
  /* remove trailing newline from string */
  int length = strlen(text);
  if (length == 0) return;
  if (text[length-1] == '\n') text[length-1] = '\0';
}
char* my_gets(char* buffer){
  /* Evil version of gets using fgets */
  /* Use at your own risk. Will facilitate buffer overflow errors. */
  char* status = fgets(buffer, INT_MAX, stdin);
  trim(buffer);
  return status;
}

char* my_getline(){
  /* Get user input. Copy to memory in heap, and return heap ponter. */
  char buffer[8];
  char* status = gets(buffer);   /* or my_gets(buffer) */
  char* result = malloc(strlen(buffer));
  strcpy(result, buffer);
  return result;
}

int main(){
  char* text;
  printf(" Type something. \n");
  text = my_getline();
  printf(" You said '%s'\n", text);
  return 0;
}