Monitor System Stuff

Usage of github.com/cloudfoundry/gosigar

package main

import (
    "fmt"
    "os"

    "github.com/cloudfoundry/gosigar"
)

const output_format = "%-15s %4s %4s %5s %4s %-15s\n"

func formatSize(size uint64) string {
    return sigar.FormatSize(size * 1024)
}

func format(val uint64) uint64 {
    return val / 1024
}

func main() {
    fmt.Println("\n")
    uptime()
    fmt.Println("\n\n")
    mem()
    fmt.Println("\n\n")
    df()
}

func uptime() {
    uptime := sigar.Uptime{}
    uptime.Get()
    fmt.Fprintf(os.Stdout, "Uptime: %s\n", uptime.Format())
}

func mem() {
    mem := sigar.Mem{}
    swap := sigar.Swap{}

    mem.Get()
    swap.Get()

    fmt.Fprintf(os.Stdout, "%18s %10s %10s\n",
        "total", "used", "free")
    fmt.Fprintf(os.Stdout, "Mem:    %10d %10d %10d\n",
        format(mem.Total), format(mem.Used), format(mem.Free))

    fmt.Fprintf(os.Stdout, "-/+ buffers/cache: %10d %10d\n",
        format(mem.ActualUsed), format(mem.ActualFree))

    fmt.Fprintf(os.Stdout, "Swap:   %10d %10d %10d\n",
        format(swap.Total), format(swap.Used), format(swap.Free))
}

func df() {
    fslist := sigar.FileSystemList{}
    fslist.Get()

    fmt.Fprintf(os.Stdout, output_format,
        "Filesystem", "Size", "Used", "Avail", "Use%", "Mounted on")

    for _, fs := range fslist.List {
        dir_name := fs.DirName

        usage := sigar.FileSystemUsage{}

        usage.Get(dir_name)

        fmt.Fprintf(os.Stdout, output_format,
            fs.DevName,
            formatSize(usage.Total),
            formatSize(usage.Used),
            formatSize(usage.Avail),
            sigar.FormatPercent(usage.UsePercent()),
            dir_name)
    }
}

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