feature: saving previous selection

Makefile

@@ -12,10 +12,10 @@ ALLFLAGS=$(CFLAGS) -I$(IDIR)
 
 LIBS=-lpam
 
-_DEPS = log.h util.h ui.h ui_state.h config.h desktop.h auth.h ofield.h efield.h keys.h users.h sessions.h chvt.h macros.h
+_DEPS = log.h util.h ui.h ui_state.h config.h desktop.h auth.h ofield.h efield.h keys.h users.h sessions.h chvt.h macros.h launch_state.h
 DEPS = $(patsubst %,$(IDIR)/%,$(_DEPS))
 
-_OBJ = main.o log.o util.o ui.o ui_state.o config.o desktop.o auth.o ofield.o efield.o users.o sessions.o chvt.o
+_OBJ = main.o log.o util.o ui.o ui_state.o config.o desktop.o auth.o ofield.o efield.o users.o sessions.o chvt.o launch_state.o
 OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))
 
 $(ODIR)/%.o: $(CDIR)/%.c $(DEPS)

include/launch_state.h

@@ -0,0 +1,12 @@
+#ifndef _LAUNCHSTATEH_
+#define _LAUNCHSTATEH_
+
+struct LaunchState {
+	int user_opt;
+	int session_opt;
+};
+
+struct LaunchState read_launch_state();
+bool write_launch_state(struct LaunchState state);
+
+#endif

src/launch_state.c

@@ -0,0 +1,35 @@
+// Small file to save last selection
+
+#define STATE_PATH "/var/lib/lidm/state"
+
+#include <stdio.h>
+#include <stdbool.h>
+
+#include "launch_state.h"
+
+static void serialize_lstate(FILE* f, struct LaunchState st) {
+	fprintf(f, "%i;%i", st.user_opt, st.session_opt);
+}
+
+static void deserialize_lstate(FILE* f, struct LaunchState* st) {
+	fscanf(f, "%i;%i", &st->user_opt, &st->session_opt);
+}
+
+struct LaunchState read_launch_state() {
+	struct LaunchState state;
+	state.user_opt = 1;
+	state.session_opt = 1;
+	FILE* f = fopen(STATE_PATH, "r");
+	if(!f) return state;
+	deserialize_lstate(f, &state);
+	fclose(f);
+	return state;
+}
+
+bool write_launch_state(struct LaunchState state) {
+	FILE* f = fopen(STATE_PATH, "w");
+	if(!f) return false;
+	serialize_lstate(f, state);
+	fclose(f);
+	return true;
+}

src/ui.c

@@ -26,6 +26,7 @@
 #include "ui_state.h"
 #include "users.h"
 #include "util.h"
+#include "launch_state.h"
 
 const u_char INPUTS_N = 3;
 
@@ -198,6 +199,14 @@ int load(struct Vector* users, struct Vector* sessions) {
   of_user = ofield_new(users->length);
   of_passwd = ofield_new(0);
 
+  struct LaunchState initial_state = read_launch_state();
+  if(initial_state.user_opt > users->length || initial_state.session_opt > sessions->length + behavior.include_defshell) {
+	  initial_state.user_opt = 1;
+	  initial_state.session_opt = 1;
+  }
+  of_user.current_opt = initial_state.user_opt;
+  of_session.current_opt = initial_state.session_opt;
+
   /// PRINTING
   const struct uint_point BOXSTART = box_start();
 
@@ -254,6 +263,11 @@ int load(struct Vector* users, struct Vector* sessions) {
       }
     } else {
       if (len == 1 && *seq == '\n') {
+        struct LaunchState ls;
+		ls.user_opt = of_user.current_opt;
+		ls.session_opt = of_session.current_opt;
+		write_launch_state(ls);
+
         if (!launch(st_user().username, of_passwd.efield.content,
                     st_session(g_config->behavior.include_defshell),
                     &restore_all, g_config)) {