blob: d05ee14e9d5ad302fcc86260ebe5995506669d8f (
plain)
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
|
module(..., package.seeall)
require("posix")
-- the following methods are available:
-- /proc/<pid>/stat the comm field (2nd) field contains name but only up
-- to 15 chars. does not resolve links
--
-- /proc/<pid>/cmdline argv[0] contains the command. However if it is a script
-- then will the interpreter show up
--
-- /proc/<pid>/exe link to exe file. this will resolv links
--
-- returns list of all pids for given exe name
--[[
-- gives lots of false positives for busybox
local function is_exe(path, name)
local f = posix.readlink(path.."/exe")
if f and (f == name or posix.basename(f) == name) then
return true
else
return false
end
end
]]--
local function is_stat(path, name)
local f = io.open(path.."/stat")
local line = f:read()
local p = string.match(line, "^%d+ %((%d+)%)")
f:close()
if p ~= nil and string.len(name) <= 15 and p == name then
return true
else
return false
end
end
local function is_cmdline(path, name)
local f = io.open(path.."/cmdline")
if f == nil then
return false
end
local line = f:read()
f:close()
if line == nil then
return false
end
local arg0 = string.gsub(line, string.char(0)..".*", "")
return posix.basename(arg0) == name
end
function pidof(name)
local pids = {}
local i, j
for i,j in pairs(posix.glob("/proc/[0-9]*")) do
local pid = tonumber(posix.basename(j))
if is_stat(j, name) or is_cmdline(j, name) then
table.insert(pids, pid)
end
end
if #pids == 0 then
pids = nil
end
return pids
end
|
