this post was submitted on 21 Aug 2023
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Programming

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How do I handle an input thats more than the char size in c? (lemm.ee)
submitted 1 year ago by [email protected] to c/programming
19 comments fedilink hide all child comments
 

cross-posted from: https://lemm.ee/post/4890334

cross-posted from: https://lemm.ee/post/4890282

let's say I have this code

` #include #include char name[50]; int main(){ fgets(name,50,stdin); name[strcspn(name, "\n")] = '\0'; printf("hi %s", name); }

` and I decide my name is "ewroiugheqripougheqpiurghperiugheqrpiughqerpuigheqrpiugherpiugheqrpiughqerpioghqe4r", my program will throw some unexpected behavior. How would I mitigate this?

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[–] [email protected] 3 points 1 year ago (1 children)

Why is this even still in the library 🥲

Twenty years ago it kind of made sense. Ok it's bad, but sometimes we're just reading a local file fully under our control, maybe from old code that the source doesn't exist anymore for, it's such a core function that taking it out however badly needed will have some negative consequences.

At this point though, I feel like calling it should just play a loud, stern "NO!" over your speakers and exit the program.

[–] [email protected] 6 points 1 year ago

Why is this even still in the library 🥲

The linker will complain at you —

dumb.c:(.text+0x2f): warning: the `gets' function is dangerous and should not be used.