From e45db79e80b28a3af083af8e3bf70a6be1b5e718 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Tue, 14 May 2019 16:43:08 +0200
Subject: Support user disabling saver + dpms

---
 src/main.c     | 12 ++++++++----
 src/userlist.h |  4 +++-
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/main.c b/src/main.c
index 502865b..a43a2f6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -138,6 +138,8 @@ int main( int argc, char **argv )
                             usr->lastActivityOffset = 0;
                         }
                     }
+                    // If this file exists, the user doesn't want screen saver or DPMS to trigger
+                    const bool useSaver = ( usr->saverFile[0] == '-' || access( usr->saverFile, F_OK ) == -1 );
                     const int idleTime = NOW - ( usr->lastActivity + usr->lastActivityOffset );
                     if ( config.dpmsTimeout > 0 && screen.screenStandby != SCREEN_UNKNOWN ) {
                         int want = SCREEN_UNKNOWN;
@@ -145,7 +147,7 @@ int main( int argc, char **argv )
                             want = SCREEN_ON;
                         } else if ( ! nextAction.disarmed && nextAction.deadline != 0 && nextAction.deadline - monoNOW < 300 ) {
                             want = SCREEN_ON;
-                        } else if ( idleTime > config.dpmsTimeout && screen.idleSeconds >= 60 ) {
+                        } else if ( useSaver && idleTime > config.dpmsTimeout && screen.idleSeconds >= 60 ) {
                             want = SCREEN_OFF;
                         }
                         if ( want != SCREEN_UNKNOWN && screen.screenStandby != want ) {
@@ -153,7 +155,7 @@ int main( int argc, char **argv )
                             setScreenDpms( usr->xauth, usr->display, want );
                         }
                     }
-                    if ( config.saverTimeout > 0 ) {
+                    if ( useSaver && config.saverTimeout > 0 ) {
                         int want = SAVER_OFF;
                         if ( config.gracePeriod >= 0 && idleTime > config.saverTimeout + config.gracePeriod
                                 && ( screen.saverState == SAVER_OFF || screen.saverState == SAVER_ACTIVE ) ) {
@@ -351,12 +353,14 @@ static void getXAuthority( struct user *user )
     if ( getpwnam_r( user->user, &p, buffer, sizeof(buffer), &ok ) != 0 || ok == NULL ) {
         user->xauth[0] = '-';
         user->xauth[1] = '\0';
+        user->saverFile[0] = '-';
+        user->saverFile[1] = '\0';
         return;
     }
     // Got valid data
+    snprintf( user->saverFile, SAVERLEN, "%s/.no-saver", p.pw_dir );
     snprintf( user->xauth, AUTHLEN, "%s/.Xauthority", p.pw_dir );
-    struct stat foo;
-    if ( stat( user->xauth, &foo ) == -1 ) {
+    if ( access( user->xauth, F_OK ) == -1 ) {
         user->xauth[0] = '-';
         user->xauth[1] = '\0';
     }
diff --git a/src/userlist.h b/src/userlist.h
index ca7a70b..189b0c2 100644
--- a/src/userlist.h
+++ b/src/userlist.h
@@ -5,7 +5,8 @@
 #include <stdbool.h>
 
 #define STRLEN (40)
-#define AUTHLEN (128)
+#define AUTHLEN (160)
+#define SAVERLEN (160)
 
 struct user {
     time_t lastActivity;
@@ -25,6 +26,7 @@ struct user {
     char display[STRLEN];
     char sessionName[STRLEN];
     char xauth[AUTHLEN];
+    char saverFile[SAVERLEN];
 };
 
 int getUserList( struct user *outbuf, int numElements );
-- 
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