What is the real use of strnlen() ??

Answer 1

strnlen (s,n) limits scanning the end of string to n characters. It is useful for finding strings shorter than n. Also it is a memory safe implemetation of strlen, which can prevent looking for the trailing zero outside of allocated memory, so prevents possible application crash.

Answer 2

Rewa Mathur Actually I missed the 'n' in strnlen! Lol

Answer 3

A useful example would be looking through a buffer from beginning till the last non-null character ¹ for some particular characters. Extending/modifying the Rewa's example:

#include <stdio.h>
#include <ctype.h>

#define MAX 1000

int main()
{
char s[MAX];
size_t i, digit = 0;

printf("Enter a string: ");
fgets(s, MAX, stdin);

size_t length = strlen(s);

for (i = 0; i < length; ++i) {
if (isdigit(s[i]))
++digit;
}

printf("Number of digit(s) in s is: %zu", digit);
}

______
¹ `strlen` searches for the first '\0' character

Answer 4

Oh yeah?!
-1 for not giving credit.
So, you know how to Google and find your answer on Stackoverflow, but you don't know how to copy/paste the link for credit?

https://stackoverflow.com/questions/26349367/what-is-the-real-use-of-strnlen