From ea2cd7dacfdad7d853547cb150c156a4acfd811b Mon Sep 17 00:00:00 2001
From: dvs1
Date: Sat, 19 Oct 2024 16:00:24 +1000
Subject: Add users script for post JACK setup, like starting music stuff.

---
 .aataaj_JACK.lua | 132 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100755 .aataaj_JACK.lua

(limited to '.aataaj_JACK.lua')

diff --git a/.aataaj_JACK.lua b/.aataaj_JACK.lua
new file mode 100755
index 0000000..b8b32a2
--- /dev/null
+++ b/.aataaj_JACK.lua
@@ -0,0 +1,132 @@
+#!/usr/bin/env luajit
+
+-- An example users .aataaj_JACK.lua script that just starts qsynth.
+
+
+-- Most of this APT stuff was copied from apt-panopticon.
+local APT = {}
+
+APT.readCmd = function(cmd)
+    local result = {}
+    local output = io.popen(cmd)
+    if nil ~= output then
+	for l in output:lines() do
+	    table.insert(result, l)
+	end
+    end
+    return result
+end
+
+
+APT.exe = function(c)
+    local exe = {status = 0, result = '', lines = {}, log = true, cmd = c .. ' ', command = c}
+
+    function exe:log()
+	self.log = true
+	return self
+    end
+    function exe:Nice(c)
+	if nil == c then
+	    self.cmd = 'ionice -c3 nice -n 19 ' .. self.cmd
+	else
+	    self.cmd = self.cmd .. 'ionice -c3 nice -n 19 ' .. c .. ' '
+	end
+	return self
+    end
+    function exe:timeout(c)
+	-- timeout returns a status of - command status if --preserve-status; "128+9" (actually 137) if --kill-after ends up being done; 124 if it had to TERM; command status if all went well.
+	-- --kill-after means "send KILL after TERM fails.
+	if nil == c then
+	    self.cmd = 'timeout --kill-after=10.0 --foreground 42.0s ' .. self.cmd
+	else
+	    self.cmd = 'timeout --kill-after=10.0 --foreground ' .. c .. ' ' .. self.cmd
+	end
+	return self
+    end
+    function exe:also(c)
+	if nil == c then c = '' else c = ' ' .. c end
+	self.cmd = self.cmd .. ';' .. c .. ' '
+	return self
+    end
+    function exe:And(c)
+	if nil == c then c = '' else c = ' ' .. c end
+	self.cmd = self.cmd .. '&&' .. c .. ' '
+	return self
+    end
+    function exe:Or(c)
+	if nil == c then c = '' end
+	self.cmd = self.cmd .. '|| ' .. c .. ' '
+	return self
+    end
+    function exe:noErr()
+	self.cmd = self.cmd .. '2>/dev/null '
+	return self
+    end
+    function exe:wait(w)
+	self.cmd = self.cmd .. '&& touch ' .. w .. ' '
+	return self
+    end
+    function exe:Do()
+    --[[    "The condition expression of a control structure can return any
+	    value. Both false and nil are considered false. All values different
+	    from nil and false are considered true (in particular, the number 0
+	    and the empty string are also true)."
+	says the docs, I beg to differ.]]
+	if true == self.log then D("  executing - &nbsp; <code>" .. self.cmd .. "</code>") end
+	--[[ Damn os.execute()
+	    Lua 5.1 says it returns "a status code, which is system-dependent"
+	    Lua 5.2 says it returns true/nil, "exit"/"signal", the status code.
+	    I'm getting 7168 or 0.  No idea what the fuck that is.
+	local ok, rslt, status = os.execute(s)
+	]]
+	local f = APT.readCmd(self.cmd, 'r')
+	-- The last line will be the command's returned status, collect everything else in result.
+	self.status = ''	-- Otherwise the result starts with 0.
+	self.result = '\n'
+	self.lines = f
+	for i,l in ipairs(f) do
+	    self.result = self.result .. l .. "\n"
+	end
+	f = APT.readCmd('echo "$?"', 'r')
+	for i,l in ipairs(f) do
+	    self.status = tonumber(l)
+	    if (137 == self.status) or (124 == self.status) then
+		print("timeout killed " .. self.status .. ' ' .. self.command)
+		E("timeout killed " .. self.status .. ' ' .. self.command)
+	    elseif (0 ~= self.status) then
+		print("status |" .. self.status .. '| ' .. self.command)
+		E("status |" .. self.status .. '| ' .. self.command)
+	    end
+	end
+	return self
+    end
+    function exe:fork(host)
+	if nil ~= host then self.cmd = self.cmd .. ';  r=$?; if [ $r -ge 124 ]; then echo "$r ' .. host .. ' failed forked command ' .. string.gsub(self.cmd, '"', "'") .. '"; fi' end
+	self.cmd = '{ ' .. self.cmd .. '; } &'
+	if true == self.log then D("  forking - &nbsp; <code>" .. self.cmd .. "</code>") end
+	os.execute(self.cmd)
+	return self
+    end
+    return exe
+end
+
+APT.exists = function(c)
+    if 0 == APT.exe('which ' .. c):Do().status then return true end
+    return false
+end
+
+APT.killEmAll = function(all)
+    for i,l in ipairs(all) do
+	local c = 0
+	while 0 ~= tonumber(APT.exe("pgrep -u $USER -xc " .. l):Do().result) do
+	    local s = 'TERM'
+	    if c > 0 then s = 'KILL'; APT.exe("sleep " .. c):Do() end
+	    print(  "pkill -" .. s .. " -u $USER -x " .. l)
+	    APT.exe("pkill -" .. s .. " -u $USER -x " .. l):Do()
+	    c = c + 1
+	end
+    end
+end
+
+
+if APT.exists('qsynth') then APT.exe('qsynth'):fork() end
-- 
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