adjust priority to realtime

3 files changed, 15 insertions, 6 deletions

diff --git a/.SRCINFO b/.SRCINFO
index 63d6fd17a0e0..34293e78d88a 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -1,6 +1,6 @@
 pkgbase = xscreensaver-oom-protect
 	pkgdesc = Protect xscreensaver from the out-of-memory killer
-	pkgver = 1.0.1
+	pkgver = 1.0.2
 	pkgrel = 1
 	arch = x86_64
 	license = custom:WTFPL
@@ -8,7 +8,7 @@ pkgbase = xscreensaver-oom-protect
 	source = xscreensaver-oom-protect.c
 	source = LICENSE
 	source = xscreensaver.service
-	md5sums = a4cc96966ac71a75bc841c0279957a2f
+	md5sums = 39a62edba8e363a511f201ebbfbb67b2
 	md5sums = 8365d07beeb5f39d87e846dca3ae7b64
 	md5sums = bb945c067ae57367ddc6f041fd33dfa4
 
diff --git a/PKGBUILD b/PKGBUILD
index fa47db44a375..ddb22059a0d2 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -1,7 +1,7 @@
 # Maintainer: Alexander Kobel <a-kobel@a-kobel.de>
 
 pkgname=xscreensaver-oom-protect
-pkgver=1.0.1
+pkgver=1.0.2
 pkgrel=1
 pkgdesc="Protect xscreensaver from the out-of-memory killer"
 arch=('x86_64')
@@ -10,7 +10,7 @@ depends=('xscreensaver')
 source=(${pkgname}.c
         LICENSE
         xscreensaver.service)
-md5sums=('a4cc96966ac71a75bc841c0279957a2f'
+md5sums=('39a62edba8e363a511f201ebbfbb67b2'
          '8365d07beeb5f39d87e846dca3ae7b64'
          'bb945c067ae57367ddc6f041fd33dfa4')
 
diff --git a/xscreensaver-oom-protect.c b/xscreensaver-oom-protect.c
index 476883502d38..6a4e4b28f715 100644
--- a/xscreensaver-oom-protect.c
+++ b/xscreensaver-oom-protect.c
@@ -24,6 +24,7 @@
 
 #include <errno.h>
 #include <limits.h>
+#include <sched.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -33,10 +34,13 @@
 int usage (char **argv) {
   fprintf (stderr,
            "Protect process <pid> from the OOM killer by setting its "
-           "oom_score_adj to %d and its nice value to -20.\n"
+           "oom_score_adj to %d, its\n"
+           "nice value to -20, and its priority to realtime.\n"
            "(TL;DR: try to avoid that an attacker types Alt+SysRq+F "
            "repeatedly and ends up\n"
-           "with your logged-in session without the xscreensaver lock.)\n"
+           "with your logged-in session without the xscreensaver lock, "
+           "and give screen locking\n"
+           "utmost urgency.)\n"
            "Will fail with error code %d if the process does not run "
            "/usr/bin/xscreensaver.\n"
            "For more information and background, see\n"
@@ -86,6 +90,7 @@ int main (int argc, char **argv) {
   char xscreensaver_exe[PATH_MAX];
   int n;
   FILE *f;
+  struct sched_param sparam;
 
   if (argc != 2)
     return usage (argv);
@@ -114,5 +119,9 @@ int main (int argc, char **argv) {
   if (setpriority (PRIO_PROCESS, pid, INT_MIN) != 0)
     return errno;
 
+  sparam.sched_priority = 99;
+  if (sched_setscheduler (pid, SCHED_FIFO, &sparam) != 0)
+    return errno;
+
   return 0;
 }