Update NixOS module to v2.0.2

Previously it couldn't find the currect user/session because the last
newline character was present in the field

CHANGELOG.md

@@ -4,6 +4,10 @@
 <!-- By "very relevant" I mean big features or something manual packagers should know, like leftover files -->
 <!-- Once a release would be opened, group the last bunch of dangling changes, add release version as header and its date -->
 
+# 2.0.2
+
+- fix off-by-one error with launch state save
+
 # 2.0.1
 
 - source and header files can be nested in `src/` and `include/`

Makefile

@@ -1,4 +1,4 @@
-VERSION := 2.0.1
+VERSION := 2.0.2
 .DEFAULT_GOAL := lidm
 
 CDIR = src

assets/pkg/nix/module.nix

@@ -11,7 +11,7 @@ let
   dmcfg = config.services.displayManager;
   desktops = dmcfg.sessionData.desktops;
 
-  version = "2.0.1";
+  version = "2.0.2";
   lidmPkg = pkgs.callPackage ./lidm.nix {
     inherit pkgs;
     config = {
@@ -21,7 +21,7 @@ let
         owner = "javalsai";
         repo = "lidm";
         rev = "v${version}";
-        sha256 = "sha256-bpUqhD1JSiYRf7w7ylEMXHMvEpnSri1zZSxRQPdZWB4=";
+        sha256 = "sha256-P0thtKNVae1oBuJq400fjZMMgd69iY4YDNed5RfQH4I=";
       };
 
       xsessions = "${desktops}/share/xsessions";

src/launch_state.c

@@ -22,16 +22,16 @@ int read_launch_state(struct LaunchState* NNULLABLE state) {
 
   size_t num = 0;
   ssize_t chars = getline(&state->username, &num, state_fd);
-  if (chars < 0) goto fail;
+  if (chars <= 0) goto fail;
-  if (state->username[chars] == '\n') state->username[chars] = 0;
+  if (state->username[chars - 1] == '\n') state->username[chars - 1] = 0;
 
   num = 0;
   chars = getline(&state->session_opt, &num, state_fd);
-  if (chars < 0) {
+  if (chars <= 0) {
     free(state->session_opt);
     goto fail;
   }
-  if (state->session_opt[chars] == '\n') state->session_opt[chars] = 0;
+  if (state->session_opt[chars - 1] == '\n') state->session_opt[chars - 1] = 0;
 
   (void)fclose(state_fd);
   return 0;