nitpicking and better c standard compliant code
let us...
...use the proper main(void) signature.
...use variable names which speak for their semantic content not their type, as types are explicitly declared.
...use perror() to signal the correct errno message upon error.
...move the password out of the running code, so we can change and find it easily.
...use exit() as it's a linear CLI tool, which can and should exit on certain failure/error states.
...decouple error handling from business logic. (e.g. getline() error handling and strcmp() for password check).
...not free() at the end of the program as it **is** and should **never** be necessary, since the OS **must** handle this.
memleak bugfix + cleanup + Makefile
- memleak bugfix as free() was missing
- dont call malloc() manually (the old way getline() always called realloc() anyway because of the way the malloc() was written [did not allocate enought memory for the string])
- small minor cleanup
- adding simple Makefile to build door challenge
- therefor if the program gets extended, its unlikly that
someone will forget to call free()
- also this gets rid of copy-paste free() calls (which look stupid)
- adding missing free() calls
- dont malloc ourselves as getline() also does a malloc
(and anyway called realloc before if the size_t was
smaller then the actual len(input-line) to behaviour
is the same!)
