1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
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 _
|
