Try out multicall binaries

multicall.c

#include <stdio.h>
#include <string.h>

// Try it out:
// gcc multicall.c -o multi
// chmod +x multi
// ln -s multi hello
// ./hello
// ln -s multi bye
// ./bye

int entry_hello();
int entry_bye();

int main(int argc, char* argv[]) {
    if (strcmp(argv[0], "./hello") == 0) {
        entry_hello();
    }
    if (strcmp(argv[0], "./bye") == 0) {
        entry_bye();
    }
}

int entry_hello() {
   // printf() displays the string inside quotation
   printf("Hello, World!");
   return 0;
}

int entry_bye() {
   // printf() displays the string inside quotation
   printf("Bye, World!");
   return 0;
}