Refactor the preparation of execvp parameters for simplicity

src/cpulimit.c

@@ -506,19 +506,15 @@ int main(int argc, char *argv[])
         /* Executable file */
         const char *cmd = argv[optind];
         /* Command line arguments */
-        char **cmd_args = (char **)malloc((size_t)(argc - optind + 1) * sizeof(char *));
+        char **cmd_args = (char **)calloc((size_t)(argc - optind + 1), sizeof(char *));
         if (cmd_args == NULL)
         {
             fprintf(stderr, "Memory allocation failed for cmd_args\n");
             exit(EXIT_FAILURE);
         }
 
-        /* Prepare command arguments */
-        for (i = 0; i < argc - optind; i++)
-        {
-            cmd_args[i] = argv[i + optind];
-        }
-        cmd_args[i] = NULL;
+        /* Prepare command arguments for execvp */
+        memcpy(cmd_args, argv + optind, (size_t)(argc - optind) * sizeof(char *));
 
         /* If verbose, print the command being executed */
         if (verbose)