luCi process list doesn't show all processes?

Grommish · May 4, 2020, 3:24am

When I run a process list on luCi, it gives me most, but not all, of the currently running processes.
In particular, snort (PID 6896) doesn't show on the list. Is the process list filtered?

Running OpenWrt SNAPSHOT r12935+261-a185cc1be1 / LuCI Master git-20.111.65731-398b198

hnyman · May 4, 2020, 2:36pm

Possibly that is due to a parsing error.
On that line you have a letter in a numeric field: "564m"

I guess that LuCI fails to parse that line and skips it.

Looks like this code expects VSZ field to be numeric "+(%d+)":

github.com

openwrt/luci/blob/e331e32b2cd28f98ada2a7c4134ea0b77b9558f0/modules/luci-base/luasrc/sys.lua#L382


      
          	local data = {}
          	local k
          	local ps = luci.util.execi("/bin/busybox top -bn1")
          
          	if not ps then
          		return
          	end
          
          	for line in ps do
          		local pid, ppid, user, stat, vsz, mem, cpu, cmd = line:match(
          			"^ *(%d+) +(%d+) +(%S.-%S) +([RSDZTW][<NW ][<N ]) +(%d+) +(%d+%%) +(%d+%%) +(.+)"
          		)
          
          		local idx = tonumber(pid)
          		if idx and not cmd:match("top %-bn1") then
          			data[idx] = {
          				['PID']     = pid,
          				['PPID']    = ppid,
          				['USER']    = user,
          				['STAT']    = stat,
          				['VSZ']     = vsz,

@jow might be able to provide more qualified reasoning.

jow · May 4, 2020, 2:59pm

Yeah, sounds right. I've never seen/expected a process with such a huge VSS on OpenWrt yet.

Grommish · May 4, 2020, 4:41pm

I run a heavy snort ruleset, so it's memory intensive.

system · May 14, 2020, 4:41pm

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