1#!/usr/bin/env bcc-lua 2--[[ 3Copyright 2016 GitHub, Inc 4 5Licensed under the Apache License, Version 2.0 (the "License"); 6you may not use this file except in compliance with the License. 7You may obtain a copy of the License at 8 9http://www.apache.org/licenses/LICENSE-2.0 10 11Unless required by applicable law or agreed to in writing, software 12distributed under the License is distributed on an "AS IS" BASIS, 13WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14See the License for the specific language governing permissions and 15limitations under the License. 16]] 17local ffi = require("ffi") 18 19return function(BPF) 20 local b = BPF:new{src_file="bashreadline.c", debug=0} 21 b:attach_uprobe{name="/bin/bash", sym="readline", fn_name="printret", retprobe=true} 22 23 local function print_readline(cpu, event) 24 print("%-9s %-6d %s" % {os.date("%H:%M:%S"), tonumber(event.pid), ffi.string(event.str)}) 25 end 26 27 b:get_table("events"):open_perf_buffer(print_readline, "struct { uint64_t pid; char str[80]; }", nil) 28 29 print("%-9s %-6s %s" % {"TIME", "PID", "COMMAND"}) 30 b:perf_buffer_poll_loop() 31end 32