feat: save user and session as strings

include/launch_state.h

@@ -2,15 +2,16 @@
 #define LAUNCHSTATEH_
 
 #include <stdbool.h>
-#include <stdio.h>
 #include <sys/stat.h>
 
+#include "macros.h"
+
 struct LaunchState {
-  int user_opt;
-  int session_opt;
+  char* NNULLABLE username;
+  char* NNULLABLE session_opt;
 };
 
-struct LaunchState read_launch_state();
+int read_launch_state(struct LaunchState* NNULLABLE state);
 bool write_launch_state(struct LaunchState state);
 
 #endif

src/launch_state.c

@@ -1,32 +1,52 @@
 // Small file for saving last selection
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "launch_state.h"
+
 #define STATE_DIR "/var/lib/lidm"
 #define STATE_FILE "/var/lib/lidm/state"
 
-#include "launch_state.h"
+#define RWXR_X___ 0750
 
-struct LaunchState read_launch_state() {
-  struct LaunchState state;
-  state.user_opt = 1;
-  state.session_opt = 1;
+int read_launch_state(struct LaunchState* NNULLABLE state) {
   FILE* state_fd = fopen(STATE_FILE, "r");
-  if (state_fd == NULL) return state;
-  if (fscanf(state_fd, "%i;%i", &state.user_opt, &state.session_opt) != 2) {
-    state.user_opt = 1;
-    state.session_opt = 1;
+  if (state_fd == NULL) return -1;
+
+  *state = (struct LaunchState){
+      .username = NULL,
+      .session_opt = NULL,
+  };
+
+  size_t num = 0;
+  if (getline(&state->username, &num, state_fd) < 0) goto fail;
+  state->username[strcspn(state->username, "\n")] = 0;
+
+  num = 0;
+  if (getline(&state->session_opt, &num, state_fd) < 0) {
+    free(state->session_opt);
+    goto fail;
   }
+  state->session_opt[strcspn(state->session_opt, "\n")] = 0;
+
   (void)fclose(state_fd);
-  return state;
+  return 0;
+
+fail:
+  (void)fclose(state_fd);
+  return -1;
 }
 
 bool write_launch_state(struct LaunchState state) {
   FILE* state_fd = fopen(STATE_FILE, "w");
   if (state_fd == NULL) {
-    if (mkdir(STATE_DIR, 0755) == -1) return false;
+    if (mkdir(STATE_DIR, RWXR_X___) == -1) return false;
     state_fd = fopen(STATE_FILE, "w");
     if (state_fd == NULL) return false;
   }
-  (void)fprintf(state_fd, "%i;%i", state.user_opt, state.session_opt);
+  (void)fprintf(state_fd, "%s\n%s\n", state.username, state.session_opt);
   (void)fclose(state_fd);
   return true;
 }

src/ui.c

@@ -21,6 +21,7 @@
 #include "efield.h"
 #include "keys.h"
 #include "launch_state.h"
+#include "log.h"
 #include "ofield.h"
 #include "sessions.h"
 #include "ui.h"
@@ -199,15 +200,33 @@ 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 + g_config->behavior.include_defshell) {
-    initial_state.user_opt = 1;
-    initial_state.session_opt = 1;
+  of_user.current_opt = users->length > 0;
+  of_session.current_opt = sessions->length > 0;
+  struct LaunchState initial_state;
+  if (read_launch_state(&initial_state) == 0) {
+    for (size_t i = 0; i < users->length; i++) {
+      struct user* user_i = (struct user*)vec_get(users, i);
+      if (strcmp(user_i->username, initial_state.username) == 0) {
+        of_user.current_opt = i + 1;
+        break;
+      }
+    }
+
+    for (size_t i = 0; i < sessions->length; i++) {
+      struct session* session_i = (struct session*)vec_get(sessions, i);
+      if (strcmp(session_i->name, initial_state.session_opt) == 0) {
+        of_session.current_opt = i + 1;
+        break;
+      }
+    }
+    if (g_config->behavior.include_defshell) {
+      if (strcmp(st_user().shell, initial_state.session_opt) == 0)
+        of_session.current_opt = sessions->length + 1;
+    }
+
+    free(initial_state.username);
+    free(initial_state.session_opt);
   }
-  of_user.current_opt = initial_state.user_opt;
-  of_session.current_opt = initial_state.session_opt;
 
   /// PRINTING
   const struct uint_point BOXSTART = box_start();
@@ -265,10 +284,11 @@ 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);
+        bool successful_write = write_launch_state((struct LaunchState){
+            .username = st_user().username,
+            .session_opt = st_session(g_config->behavior.include_defshell).name,
+        });
+        if (!successful_write) log_puts("[E] failed to write launch state");
 
         if (!launch(st_user().username, of_passwd.efield.content,
                     st_session(g_config->behavior.include_defshell),