simple_file_read.c

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

char* readFile(char* input) {

    FILE* input_file = fopen(input, "r");
    
    if(!input_file) return NULL;

    fseek(input_file, 0, SEEK_END);
    unsigned long input_file_size = ftell(input_file);
    rewind(input_file);

    unsigned long buffer = 16 - (input_file_size % 10);

    char* input_text = (char*) malloc (input_file_size + buffer + 1);
    fread(input_text, input_file_size, 1, input_file);
    fclose(input_file);

    input_text[input_file_size + buffer] = '\0';

    return input_text;
}

int main(int argc, char **argv) {

    if(argc != 2) return 1;

    char* text = readFile(argv[1]);
    
    if(!text) return 1;

    printf("%s", text);
}