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146
main.c
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146
main.c
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/*
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defcon-chan: a simple C program that fetches current/last known DEFCON level into your terminal!
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requirements: libcurl
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compiling w/ GCC: gcc main.c -o defcon -lcurl
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running: ./defcon
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author: hornetmaidan
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <curl/curl.h>
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#define URL "https://defconwarningsystem.com/code.dat"
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#define FILENAME ".defcon.txt" // saves the last known DEFCON level into a local file(hidden for aesthetic purposes)
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// ANSI colors
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#define COLOR_RESET "\033[0m"
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#define COLOR_RED "\033[31m"
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#define COLOR_GREEN "\033[32m"
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#define COLOR_YELLOW "\033[33m"
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#define COLOR_BLUE "\033[34m"
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#define COLOR_MAGENTA "\033[35m"
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#define COLOR_CYAN "\033[36m"
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#define COLOR_WHITE "\033[37m"
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#define COLOR_BLINK "\033[5m"
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// write callback function for curl handler
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size_t write_data(void *ptr1, size_t size, size_t nmemb, FILE *stream) {
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size_t written = fwrite(ptr1, size, nmemb, stream);
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return written;
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}
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int main(void) {
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CURL *curl;
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CURLcode result;
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FILE *fp;
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char last_known[256] = "N/A";
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char failsafe[256] = "N/A";
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curl = curl_easy_init();
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// load cached DEFCON level into the buffer, also check for file access
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if (access(FILENAME, F_OK) != -1) {
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fp = fopen(FILENAME, "rb");
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if (fp != NULL) {
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if (fgets(last_known, sizeof(last_known), fp) != NULL) {
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// remove newline char
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size_t len = strlen(last_known);
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if (len > 0 && last_known[len - 1] == '\n') {
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last_known[len - 1] = '\0';
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}
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strncpy(failsafe, last_known, sizeof(failsafe));
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failsafe[sizeof(failsafe) - 1] = '\0'; // ensure null termination
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} else {
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fprintf(stderr, "%serror reading from file :(%s\n", COLOR_MAGENTA, COLOR_RESET);
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}
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fclose(fp);
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} else {
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fprintf(stderr, "%sfailed to open file :9%s\n", COLOR_MAGENTA, COLOR_RESET);
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}
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} else {
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fprintf(stderr, "%sno cache file found, creating...%s\n", COLOR_MAGENTA, COLOR_RESET);
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}
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fp = fopen(FILENAME, "w");
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// a lil bit of error handling here and there
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if (curl == NULL) {
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fprintf(stderr, "%sHTTP request failed :(%s\n", COLOR_MAGENTA, COLOR_RESET);
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curl_easy_cleanup(curl);
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}
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// fun begins
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fprintf(stdout, "%s----------------------------------------------------------------------\n", COLOR_GREEN);
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fprintf(stdout, "defcon-chan is at your service! getting the current DEFCON level desu~\n");
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// setting options for curl
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curl_easy_setopt(curl, CURLOPT_URL, URL);
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
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result = curl_easy_perform(curl); // actual request performing
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curl_easy_cleanup(curl);
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if (result != CURLE_OK) {
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fprintf(stderr, "%serror: %s%s\n", COLOR_MAGENTA, curl_easy_strerror(result), COLOR_RESET);
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fprintf(stdout, "%sservice is currently unreachable, the last DEFCON level is: %s%s\n", COLOR_CYAN, failsafe, COLOR_RESET);
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fp = fopen(FILENAME, "w");
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fprintf(fp, "%s", failsafe);
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fclose(fp);
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return -1;
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} else {
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fflush(fp);
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fclose(fp);
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fp = fopen(FILENAME, "r"); // i don't know if there's a better way to do this but since there are only 5 conditions - why not?
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if (fgets(last_known, sizeof(last_known), fp) != NULL) {
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if (strcmp(last_known, "5") == 0)
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{
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fprintf(stdout, "the current DEFCON level is: %s%s%s - FADE OUT%s%s\n", COLOR_BLUE, COLOR_BLINK, last_known, COLOR_RESET, COLOR_RESET);
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}
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else if (strcmp(last_known, "4") == 0)
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{
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fprintf(stdout, "the current DEFCON level is: %s%s%s - DOUBLE TAKE%s%s\n", COLOR_GREEN, COLOR_BLINK, last_known, COLOR_RESET, COLOR_RESET);
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}
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else if (strcmp(last_known, "3") == 0)
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{
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fprintf(stdout, "the current DEFCON level is: %s%s%s - ROUND HOUSE%s%s\n", COLOR_YELLOW, COLOR_BLINK, last_known, COLOR_RESET, COLOR_RESET);
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}
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else if (strcmp(last_known, "2") == 0)
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{
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fprintf(stdout, "the current DEFCON level is: %s%s%s - FAST PACE%s%s\n", COLOR_RED, COLOR_BLINK, last_known, COLOR_RESET, COLOR_RESET);
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}
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else if (strcmp(last_known, "1") == 0)
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{
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fprintf(stdout, "the current DEFCON level is: %s%s%s - COCKED PISTOL%s%s\n", COLOR_WHITE, COLOR_BLINK, last_known, COLOR_RESET, COLOR_RESET);
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fprintf(stdout, "%%ssWHAT ARE YOU DOING? RUN FOR YOUR LIFE!%s%s\n", COLOR_MAGENTA, COLOR_BLINK, COLOR_RESET, COLOR_RESET);
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}
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else
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{
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fprintf(stderr, "%serror reading the DEFCON level from the file%s\n", COLOR_RED, COLOR_RESET);
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}
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}
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fclose(fp);
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fp = fopen(FILENAME, "w");
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if (strcmp(last_known, "N/A") == 0) {
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fprintf(fp, "%s", failsafe); // writing the last safe DEFCON value ever known
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fprintf(stdout, "failsafe engaged with level of %s", failsafe);
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}
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else {
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fprintf(fp, "%s", last_known);
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}
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}
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fclose(fp);
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fprintf(stdout, "%s----------------------------------------------------------------------%s\n", COLOR_GREEN, COLOR_RESET);
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return 0;
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}
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