изменено: перешел на с++. тк проще будет работать с фото. изменил скрипт сборки под c++

build.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 echo "начинаю сборку"
 
-gcc main.c libs/argparse.c -o zenith-cli -lcurl
+g++ main.cpp libs/argparse.c -o zenith-cli -lcurl
 
 echo "сборкa завершена"

main.cpp

@@ -1,11 +1,14 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdlib.h>
+#include <iostream>
+#include <string>
+#include <filesystem>
+#include <cstdlib>
 
-#include "libs/argparse.h"
 #include "curl/curl.h"
 
+extern "C" {
+    #include "libs/argparse.h"
+}
+
 struct Scheme{
 	char fg_color[8];
 	char sub_fg_color[8];
@@ -63,16 +66,13 @@ int download_wall(const char* link, const char* path){
     return 0;
 }
 
+namespace fs = std::filesystem;
+
 int main(int argc, const char **argv) {
-    const char* link = NULL;
-    const char* user_home = getenv("HOME");
-    const char* filename = "wallpaper.jpg";
 
-    char* raw_scheme_path = NULL;
-    char* raw_wall_path = NULL;
-
-	char wall_output[512];
-    char path[512];
+    const char* link = nullptr;
+    const char* raw_scheme_path = nullptr;
+    const char* raw_wall_path = nullptr;
 
     int is_pastel = 0;
 
@@ -90,20 +90,30 @@ int main(int argc, const char **argv) {
     };
 
     struct argparse argparse;
-    argparse_init(&argparse, options, NULL, 0);
+    argparse_init(&argparse, options, nullptr, 0);
     argc = argparse_parse(&argparse, argc, argv);
 	
-    if (raw_wall_path == NULL){
-    	wall_output[0] = '.';
-    	wall_output[1] = '/';
-    }
-    else if (raw_wall_path[0] == '~'){
-		snprintf(wall_output, sizeof(wall_output), \
-			"%s%s", user_home, raw_wall_path + 1);
-    }
-    snprintf(path, sizeof(path), "%s%s", wall_output, filename);
+    fs::path target_dir;
 
-	download_wall(link, path);
+    if (raw_wall_path == nullptr || std::string(raw_wall_path).empty()){
+        target_dir = fs::current_path();
+    }
+    else{
+        std::string path_str(raw_wall_path);
+        if (path_str[0] == '~'){
+    		const char* user_home = std::getenv("HOME");
+            if (user_home){
+                path_str.replace(0, 1, user_home);
+            }
+        }
+        target_dir = fs::path(path_str);
+    }
+
+    fs::path full_path = target_dir / "wallpaper.jpg";
+
+    std::cout << full_path << std::endl;
+
+	// download_wall(link, path);
 
     return 0;
 }