What is abort_handler_s in C?
We use the abort_handler_s function to write an error message on the defined format on the standard error stream stderr. We use this as a parameter of the function set_constraint_handler_s.
It outputs it to stderr, which is displayed on the terminal.
After output to stdout, abort_handler_s calls the abort function.
Library
#include<stdlib.h>
Syntax
void abort_handler_s
(
const char * restrict message,
void * restrict temp,
errno_t error
);
Parameters
message - A pointer to the message which describes the error.
temp - A pointer to the data given.
error - Error code.
Return value
This function has no return value.
Code
#include <string.h>#include <stdio.h>#include <stdlib.h>int main(void){char* ptr = NULL;set_constraint_handler_s(abort_handler_s);gets_s(ptr, 9);return 0;}
In this piece of code, we initialize a pointer to an array and store NULL in it.
Then, we call the set_constraint_handler_s function and pass the abort_handler_s as a parameter.
Next, we call the gets_s function.
The benefit of using
gets_sfunction is that no matter how many characters the user inputs, only the first 9 characters are stored in the ptr.
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