1 files changed, 170 insertions, 0 deletions

diff --git a/_.lua b/_.lua
new file mode 100755
index 0000000..c1710ee
--- /dev/null
+++ b/_.lua
@@ -0,0 +1,170 @@
+#!/usr/bin/env luajit
+
+
+-- Most of this _ stuff was copied from apt-panopticon.
+local _ = {}
+
+_.version = '0.0 crap'
+
+_.D = function(s)       print('DEBUG    ' .. s) end
+_.I = function(s)       print('INFO     ' .. s) end
+_.T = function(s)       print('TIMEOUT  ' .. s) end
+_.W = function(s)       print('WARNING  ' .. s) end
+_.E = function(s)       print('ERROR    ' .. s) end
+_.C = function(s)       print('CRITICAL ' .. s) end
+local D = _.D
+local I = _.I
+local T = _.T
+local W = _.W
+local E = _.E
+local C = _.C
+
+
+_.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
+    -- While this does return the same things as os.execute(), it's just as useless.
+    output:close()
+    return result
+end
+
+
+_._ = function(c)
+    local exe = {status = 0, lines = {}, logging = false, showing = false, cmd = '', command = c}
+    local n = 0
+
+    exe.cmd = '{ '
+    if 'table' == type(c) then
+        for i, l in ipairs(c) do
+            n = n + 1
+            exe.cmd = exe.cmd .. l .. ' ; '
+        end
+    elseif 'string' == type(c) then
+        for l in string.gmatch(c, "\n*([^\n]+)\n*") do
+            if '' ~= l then
+                n = n + 1
+                exe.cmd = exe.cmd .. l .. ' ; '
+            end
+        end
+    end
+    exe.cmd = exe.cmd .. ' } '
+    if 1 == n then exe.cmd = c end
+
+    function exe:log()
+        self.logging = true
+        return self
+    end
+    function exe:show()
+        self.showing = 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:noOut()
+        self.cmd = self.cmd .. ' 1>/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.logging then D(" executing - " .. self.cmd) 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)
+        ]]
+        self.lines = _.readCmd(self.cmd .. '; echo "$?"', 'r')
+        -- The last line will be the command's returned status, collect everything else in lines.
+        self.status = tonumber(self.lines[#self.lines])
+        self.lines[#self.lines] = nil
+        if true == self.showing then for i, l in ipairs(self.lines) do D(l) end end
+        if (137 == self.status) or (124 == self.status) then
+            T("timeout killed " .. self.status .. ' ' .. self.command)
+        elseif (nil == self.status) then
+            I("STATUS |" .. "NIL" .. '| ' .. self.command)
+        elseif (0 ~= self.status) then
+            I("STATUS |" .. self.status .. '| ' .. self.command)
+        end
+        return self
+    end
+    function exe:fork(host)
+        if nil ~= host then self.cmd = self.cmd .. ';  r=$?; if [ $r -ge 124 ]; then echo "$r ' .. host .. ' failed forked command ' .. string.gsub(self.cmd, '"', "'") .. '"; fi' end
+        self.cmd = '{ ' .. self.cmd .. ' ; } & '
+        if true == self.logging then D(" forking - " .. self.cmd) end
+        os.execute(self.cmd)
+        return self
+    end
+    return exe
+end
+local __ = _._
+
+
+_.exists = function(c)
+    if 0 == __('which ' .. c):Do().status then return true end
+    return false
+end
+
+
+_.killEmAll = function(all)
+    for i,l in ipairs(all) do
+        local c = 0
+        while 0 ~= tonumber(__("pgrep -u $USER -xc " .. l):Do().lines[1]) do
+            local s = 'TERM'
+            if c > 1 then s = 'KILL'; __("sleep " .. c):Do() end
+            __("pkill -" .. s .. " -u $USER -x " .. l):log():Do()
+            c = c + 1
+        end
+    end
+end
+
+
+
+return _