displays processes that delete a file

spy_deletes.lua

description = "displays processes that delete a file"
short_description = "spy file deletion"
category = "files"

args = 
{
    {
        name = "path", 
        description = "the path of the file to monitor", 
        argtype = "string"
    },
}

function on_set_arg(name, val)
    path = val
    return true
end

function on_init()
    local filename = path
    for i in string.gmatch(path, "[^/]+") do
        filename = i
    end
    chisel.set_event_formatter("%proc.pid\t%proc.name")
    chisel.set_filter(
        "(evt.type=unlinkat and (evt.arg.name=" .. path .. " or \
	                         evt.arg.name=" .. filename .. ")) or \
	 (evt.type=unlink and evt.arg.path=" .. path .. ")")
    return true
end