Maneira segura de pegar o input do usuário

lscanf.c

/********************
 * Developed by Luiz Felipe.
 *
 * GitHub:   https://github.com/Silva97
 * Facebook: https://www.facebook.com/B4.0E.B0.48.CD.10.B0.69.CD.10.C3
 ********************/

#include <stdio.h>
#include <stdarg.h>
#include <limits.h>

int lscanf(char *text, const char *format, ...);

int main(){
    char str[6];
    int x, y, z;

    lscanf("Valor de STR: ", "%5s", str);
    lscanf("Valor de X:   ", "%d",  &x);
    lscanf("Valor de Y:   ", "%d",  &y);
    lscanf("Valor de Z:   ", "%d",  &z);

    printf("str = %s\n", str);
    printf("x   = %d\n", x);
    printf("y   = %d\n", y);
    printf("z   = %d\n", z);
    return 0;
}

int lscanf(char *text, const char *format, ...){
    char    buff[MAX_INPUT];
    int     ret;
    va_list args;

    if(text)
        fputs(text, stdout);
    fgets(buff, sizeof buff, stdin);

    va_start(args, format);
    ret = vsscanf(buff, format, args);
    va_end(args);

    return ret;
}