From 305ba225e4909a2ccb3c33b746416768384d10c7 Mon Sep 17 00:00:00 2001
From: Alastair Poole <netstar@gmail.com>
Date: Fri, 31 Jul 2020 19:13:23 +0100
Subject: [PATCH] processes: Allow toggle of kernel threads.

---
 NEWS                     |  6 ++++++
 README                   |  5 +++++
 src/bin/system/process.c | 23 +++++++++++++++++++----
 src/bin/system/process.h |  7 +++++++
 src/bin/ui/ui.c          |  3 +++
 5 files changed, 40 insertions(+), 4 deletions(-)

diff --git a/NEWS b/NEWS
index ca3f3f6..f44fa49 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+============
+Evisum 0.5.3
+============
+
+  * Option to show kernel threads.
+
 ============
 Evisum 0.5.2
 ============
diff --git a/README b/README
index 4108329..aec86b9 100644
--- a/README
+++ b/README
@@ -29,3 +29,8 @@ Patches with bug fixes are more than welcome. If you do wish to
 add a substantial querying feature PLEASE ensure that it works reliaibly
 on OpenBSD, Linux and FreeBSD (ideally macOS also). UI changes
 should be platform independent.
+
+NOTES:
+
+Ctrl + k or Ctrl + K to show kernel threads.
+Ctrl + e or Ctrl + E to show evisum in the process list.
diff --git a/src/bin/system/process.c b/src/bin/system/process.c
index f13ab9d..e8b2f49 100644
--- a/src/bin/system/process.c
+++ b/src/bin/system/process.c
@@ -44,6 +44,20 @@
 
 #include "macros.h"
 
+static Eina_Bool _show_kthreads = EINA_FALSE;
+
+void
+proc_info_kthreads_show_set(Eina_Bool enabled)
+{
+   _show_kthreads = enabled;
+}
+
+Eina_Bool
+proc_info_kthreads_show_get(void)
+{
+   return _show_kthreads;
+}
+
 static const char *
 _process_state_name(char state)
 {
@@ -305,7 +319,8 @@ _process_list_linux_get(void)
         if (!_stat(eina_slstr_printf("/proc/%d/stat", pid), &st))
           continue;
 
-        if (st.flags & PF_KTHREAD) continue;
+        if (st.flags & PF_KTHREAD && !proc_info_kthreads_show_get())
+          continue;
 
         Proc_Info *p = calloc(1, sizeof(Proc_Info));
         if (!p) return NULL;
@@ -895,7 +910,7 @@ _process_list_freebsd_fallback_get(void)
         if (sysctl(mib, 4, &kp, &len, NULL, 0) == -1)
           continue;
 
-        if (kp.ki_flag & P_KPROC)
+        if (kp.ki_flag & P_KPROC && !proc_info_kthreads_show_get())
           continue;
 
         Proc_Info *p = _proc_thread_info(&kp, EINA_FALSE);
@@ -928,7 +943,7 @@ _process_list_freebsd_get(void)
 
    for (int i = 0; i < pid_count; i++)
      {
-        if (kps[i].ki_flag & P_KPROC)
+        if (kps[i].ki_flag & P_KPROC && !proc_info_kthreads_show_get())
           continue;
 
         kp = &kps[i];
@@ -988,7 +1003,7 @@ proc_info_by_pid(int pid)
 
    for (int i = 0; i < pid_count; i++)
      {
-        if (kps[i].ki_flag & P_KPROC)
+        if (kps[i].ki_flag & P_KPROC && !proc_info_kthreads_show_get())
           continue;
         if (kps[i].ki_pid != pid)
           continue;
diff --git a/src/bin/system/process.h b/src/bin/system/process.h
index f7f3c30..de69205 100644
--- a/src/bin/system/process.h
+++ b/src/bin/system/process.h
@@ -76,6 +76,13 @@ proc_info_by_pid(int pid);
 void
 proc_info_free(Proc_Info *proc);
 
+
+void
+proc_info_kthreads_show_set(Eina_Bool enabled);
+
+Eina_Bool
+proc_info_kthreads_show_get(void);
+
 /**
  * @}
  */
diff --git a/src/bin/ui/ui.c b/src/bin/ui/ui.c
index 8c7c7e5..dfb8c81 100644
--- a/src/bin/ui/ui.c
+++ b/src/bin/ui/ui.c
@@ -1381,6 +1381,9 @@ _evisum_key_down_cb(void *data, Evas *e, Evas_Object *obj, void *event_info)
    if (ev->keyname[0] == 'e' || ev->keyname[0] == 'E')
      ui->show_self = !ui->show_self;
 
+   if (ev->keyname[0] == 'k' || ev->keyname[0] == 'K')
+     proc_info_kthreads_show_set(!proc_info_kthreads_show_get());
+
    _config_save(ui);
 }