Add columns for process autogroup identifier and nice value

Adds AGRP (autogroup) and ANI (autogroup nice) columns that
report the information from /proc/PID/autogroup, as well as
handlers for '{' and '}' to change the autogroup nice value.

This is guarded by /proc/sys/kernel/sched_autogroup_enabled
such that sampling and/or changing values wont be attempted
unless the kernel feature is enabled.

Fixes: #720

1 files changed, 30 insertions, 0 deletions

diff --git a/linux/Platform.c b/linux/Platform.c
index d23bf57d..64be93c7 100644
--- a/linux/Platform.c
+++ b/linux/Platform.c
@@ -150,8 +150,38 @@ static Htop_Reaction Platform_actionSetIOPriority(State* st) {
    return HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
 
+static bool Platform_changeAutogroupPriority(MainPanel* panel, int delta) {
+   if (LinuxProcess_isAutogroupEnabled() == false) {
+      beep();
+      return false;
+   }
+   bool anyTagged;
+   bool ok = MainPanel_foreachProcess(panel, LinuxProcess_changeAutogroupPriorityBy, (Arg) { .i = delta }, &anyTagged);
+   if (!ok)
+      beep();
+   return anyTagged;
+}
+
+static Htop_Reaction Platform_actionHigherAutogroupPriority(State* st) {
+   if (Settings_isReadonly())
+      return HTOP_OK;
+
+   bool changed = Platform_changeAutogroupPriority(st->mainPanel, -1);
+   return changed ? HTOP_REFRESH : HTOP_OK;
+}
+
+static Htop_Reaction Platform_actionLowerAutogroupPriority(State* st) {
+   if (Settings_isReadonly())
+      return HTOP_OK;
+
+   bool changed = Platform_changeAutogroupPriority(st->mainPanel, 1);
+   return changed ? HTOP_REFRESH : HTOP_OK;
+}
+
 void Platform_setBindings(Htop_Action* keys) {
    keys['i'] = Platform_actionSetIOPriority;
+   keys['{'] = Platform_actionLowerAutogroupPriority;
+   keys['}'] = Platform_actionHigherAutogroupPriority;
 }
 
 const MeterClass* const Platform_meterTypes[] = {