cosmetic changes + enter behavior (#126)

* remove trailing whitespace

* always submit password on enter

Moves the keypress logic for keypresses from if-else statements
to switches, adds non-contextual behavior on pressing enter

* wrap pam actions and handle errors at on spot

* init all of text struct in input_text()

This gets rid off valgrind warning on unitialized variables

src/config.c

@@ -263,7 +263,7 @@ void config_defaults()
 	config.blank_box = true;
 	config.blank_password = false;
 	config.console_dev = strdup("/dev/console");
-	config.default_input = 2;
+	config.default_input = PASSWORD_INPUT;
 	config.fg = 9;
 	config.hide_borders = false;
 	config.input_len = 34;

src/config.h

@@ -3,6 +3,12 @@
 
 #include "ctypes.h"
 
+enum INPUTS {
+	SESSION_SWITCH,
+	LOGIN_INPUT,
+	PASSWORD_INPUT,
+};
+
 struct lang
 {
 	char* capslock;

src/inputs.c

@@ -115,6 +115,8 @@ void input_text(struct text* target, u64 len)
 	target->end = target->text;
 	target->visible_start = target->text;
 	target->len = len;
+	target->x = 0;
+	target->y = 0;
 }
 
 void input_desktop_free(struct desktop* target)

src/login.c

@@ -423,6 +423,24 @@ void shell(struct passwd* pwd)
 	reset_terminal(pwd);
 }
 
+// pam_do performs the pam action specified in pam_action
+// on pam_action fail, call diagnose and end pam session
+int pam_do(
+	int (pam_action)(struct pam_handle *, int),
+	struct pam_handle *handle,
+	int flags,
+	struct term_buf *buf)
+{
+	int status = pam_action(handle, flags);
+
+	if (status != PAM_SUCCESS) {
+		pam_diagnose(status, buf);
+		pam_end(handle, status);
+	}
+
+	return status;
+}
+
 void auth(
 	struct desktop* desktop,
 	struct text* login,
@@ -445,39 +463,31 @@ void auth(
 		return;
 	}
 
-	ok = pam_authenticate(handle, 0);
+	ok = pam_do(pam_authenticate, handle, 0, buf);
 
 	if (ok != PAM_SUCCESS)
 	{
-		pam_diagnose(ok, buf);
-		pam_end(handle, ok);
 		return;
 	}
 
-	ok = pam_acct_mgmt(handle, 0);
+	ok = pam_do(pam_acct_mgmt, handle, 0, buf);
 
 	if (ok != PAM_SUCCESS)
 	{
-		pam_diagnose(ok, buf);
-		pam_end(handle, ok);
 		return;
 	}
 
-	ok = pam_setcred(handle, PAM_ESTABLISH_CRED);
+	ok = pam_do(pam_setcred, handle, PAM_ESTABLISH_CRED, buf);
 
 	if (ok != PAM_SUCCESS)
 	{
-		pam_diagnose(ok, buf);
-		pam_end(handle, ok);
 		return;
 	}
 
-	ok = pam_open_session(handle, 0);
+	ok = pam_do(pam_open_session, handle, 0, buf);
 
 	if (ok != PAM_SUCCESS)
 	{
-		pam_diagnose(ok, buf);
-		pam_end(handle, ok);
 		return;
 	}
 
@@ -621,21 +631,17 @@ void auth(
 	desktop_load(desktop);
 
 	// close pam session
-	ok = pam_close_session(handle, 0);
+	ok = pam_do(pam_close_session, handle, 0, buf);
 	
 	if (ok != PAM_SUCCESS)
 	{
-		pam_diagnose(ok, buf);
-		pam_end(handle, ok);
 		return;
 	}
 
-	ok = pam_setcred(handle, PAM_DELETE_CRED);
+	ok = pam_do(pam_setcred, handle, PAM_DELETE_CRED, buf);
 	
 	if (ok != PAM_SUCCESS)
 	{
-		pam_diagnose(ok, buf);
-		pam_end(handle, ok);
 		return;
 	}
 
@@ -645,4 +651,4 @@ void auth(
 	{
 		pam_diagnose(ok, buf);
 	}
-}
+}

src/main.c

@@ -47,7 +47,7 @@ void log_init(char** log)
 	log[DGN_NULL] = lang.err_null;
 	log[DGN_ALLOC] = lang.err_alloc;
 	log[DGN_BOUNDS] = lang.err_bounds;
-	log[DGN_DOMAIN] = lang.err_domain; 
+	log[DGN_DOMAIN] = lang.err_domain;
 	log[DGN_MLOCK] = lang.err_mlock;
 	log[DGN_XSESSIONS_DIR] = lang.err_xsessions_dir;
 	log[DGN_XSESSIONS_OPEN] = lang.err_xsessions_open;
@@ -196,45 +196,43 @@ int main(int argc, char** argv)
 
 		if (event.type == TB_EVENT_KEY)
 		{
-			if (event.key == TB_KEY_F1)
+			switch (event.key)
 			{
+			case TB_KEY_F1:
 				shutdown = true;
+				run = false;
 				break;
-			}
-			else if (event.key == TB_KEY_F2)
-			{
+			case TB_KEY_F2:
 				reboot = true;
+				run = false;
 				break;
-			}
-			else if (event.key == TB_KEY_CTRL_C)
-			{
+			case TB_KEY_CTRL_C:
+				run = false;
 				break;
-			}
-			else if ((event.key == TB_KEY_ARROW_UP) && (active_input > 0))
-			{
-				--active_input;
-				update = true;
-			}
-			else if (((event.key == TB_KEY_ARROW_DOWN)
-				|| (event.key == TB_KEY_ENTER))
-				&& (active_input < 2))
-			{
-				++active_input;
-				update = true;
-			}
-			else if (event.key == TB_KEY_TAB)
-			{
+			case TB_KEY_ARROW_UP:
+				if (active_input > 0)
+				{
+					--active_input;
+					update = true;
+				}
+				break;
+			case TB_KEY_ARROW_DOWN:
+				if (active_input < 2)
+				{
+					++active_input;
+					update = true;
+				}
+				break;
+			case TB_KEY_TAB:
 				++active_input;
 
 				if (active_input > 2)
 				{
-					active_input = 0;
+					active_input = PASSWORD_INPUT;
 				}
-
 				update = true;
-			}
-			else if (event.key == TB_KEY_ENTER)
-			{
+				break;
+			case TB_KEY_ENTER:
 				save(&desktop, &login);
 				auth(&desktop, &login, &password, &buf);
 				update = true;
@@ -242,6 +240,8 @@ int main(int argc, char** argv)
 				if (dgn_catch())
 				{
 					++auth_fails;
+					// move focus back to password input
+					active_input = PASSWORD_INPUT;
 
 					if (dgn_output_code() != DGN_PAM)
 					{
@@ -256,13 +256,13 @@ int main(int argc, char** argv)
 				}
 
 				load(&desktop, &login);
-			}
-			else
-			{
+				break;
+			default:
 				(*input_handles[active_input])(
 					input_structs[active_input],
 					&event);
 				update = true;
+				break;
 			}
 		}
 	}