75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package main
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import (
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"fmt"
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"strings"
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"regexp"
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"io/ioutil"
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"strconv"
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)
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// Proc is a struct with process information
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type Proc struct {
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Pid int
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CmdLine string
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Swap int
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}
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// NewProc initialize a new Proc struct
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func NewProc(pid int) *Proc {
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proc := new(Proc)
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proc.Pid = pid
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proc.CmdLine = CmdLine(pid)
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proc.Swap = Swap(pid)
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return proc
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}
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// CmdLine return the command line for a process
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func CmdLine(pid int) string {
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data, err := ioutil.ReadFile(fmt.Sprintf("/proc/%d/cmdline", pid))
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if err != nil {
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return ""
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}
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cmdline := strings.Replace(string(data), "\x00", " ", -1)
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return cmdline
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}
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// Swap return the swap usage for a process
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func Swap(pid int) int {
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data, err := ioutil.ReadFile(fmt.Sprintf("/proc/%d/status", pid))
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if err != nil {
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return 0
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}
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r := regexp.MustCompile(`VmSwap:\s+(\d+) kB`)
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match := r.FindSubmatch(data)
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if len(match) == 0 {
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return 0
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}
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swap, err := strconv.Atoi(string(match[1]))
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if err != nil {
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return 0
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}
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return swap
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}
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