Implement error reporting for sleep command

res/lang/en.ini

@@ -35,6 +35,7 @@ err_perm_dir = failed to change current directory
 err_perm_group = failed to downgrade group permissions
 err_perm_user = failed to downgrade user permissions
 err_pwnam = failed to get user info
+err_sleep = failed to execute sleep command
 err_unknown = an unknown error occurred
 err_user_gid = failed to set user GID
 err_user_init = failed to initialize user

src/config/Lang.zig

@@ -36,6 +36,7 @@ err_perm_dir: []const u8 = "failed to change current directory",
 err_perm_group: []const u8 = "failed to downgrade group permissions",
 err_perm_user: []const u8 = "failed to downgrade user permissions",
 err_pwnam: []const u8 = "failed to get user info",
+err_sleep: []const u8 = "failed to execute sleep command",
 err_unknown: []const u8 = "an unknown error occurred",
 err_user_gid: []const u8 = "failed to set user GID",
 err_user_init: []const u8 = "failed to initialize user",

src/main.zig

@@ -583,7 +583,14 @@ pub fn main() !void {
                         sleep.stdout_behavior = .Ignore;
                         sleep.stderr_behavior = .Ignore;
 
-                        _ = sleep.spawnAndWait() catch {};
+                        handle_sleep_cmd: {
+                            const process_result = sleep.spawnAndWait() catch {
+                                break :handle_sleep_cmd;
+                            };
+                            if (process_result.Exited != 0) {
+                                try info_line.addMessage(lang.err_sleep, config.error_bg, config.error_fg);
+                            }
+                        }
                     }
                 } else if (pressed_key == brightness_down_key or pressed_key == brightness_up_key) {
                     const cmd = if (pressed_key == brightness_down_key) config.brightness_down_cmd else config.brightness_up_cmd;