Day 5_2.C

//      $$$$$$\   $$$$$$\  $$$$$$$\      $$$$$$$\                                               $$$$$$\       $$$$$$\                  $$\
//     $$ ___$$\ $$  __$$\ $$  ____|     $$  __$$\                                             $$  __$$\     $$  __$$\                 $$ |
//     \_/   $$ |$$ /  \__|$$ |          $$ |  $$ | $$$$$$\  $$\   $$\  $$$$$$$\      $$$$$$\  $$ /  \__|    $$ /  \__| $$$$$$\   $$$$$$$ | $$$$$$\
//        $$$$$ / $$$$$$$\  $$$$$$$\     $$ |  $$ | \____$$\ $$ |  $$ |$$  _____|    $$  __$$\ $$$$\         $$ |      $$  __$$\ $$  __$$ |$$  __$$\
//       \___$$\ $$  __$$\ \_____$$\     $$ |  $$ | $$$$$$$ |$$ |  $$ |\$$$$$$\      $$ /  $$ |$$  _|        $$ |      $$ /  $$ |$$ /  $$ |$$$$$$$$ |
//     $$\   $$ |$$ /  $$ |$$\   $$      $$ |  $$ |$$  __$$ |$$ |  $$ | \____$$\     $$ |  $$ |$$ |          $$ |  $$\ $$ |  $$ |$$ |  $$ |$$   ____|
//     \$$$$$$  | $$$$$$  |\$$$$$$  |    $$$$$$$  |\$$$$$$$ |\$$$$$$$ |$$$$$$$  |    \$$$$$$  |$$ |          \$$$$$$  |\$$$$$$  |\$$$$$$$ |\$$$$$$$\
//      \______/  \______/  \______/     \_______/  \_______| \____$$ |\_______/      \______/ \__|           \______/  \______/  \_______| \_______|
//                                                             $$\   $$ |
//                                                             \$$$$$$  |
//                                                              \______/
// Author : Saihaj Law
// Date : January 5th
// Project : Unix GREP simplified version
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char *argv[]) {
    FILE *file = fopen(argv[1], "r");
    if (file == NULL) {
        perror("Error opening file");
        return 1;
    }

    char line[1024];

    while (fgets(line, 1024, file)) {
        if (strstr(line, argv[2])) {
            printf("%s", line);
        }
    }

    fclose(file);

    return 0;
}