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code to validate Linux system #24

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code to validate Linux system #24

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20 changes: 18 additions & 2 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ const DEFAULT_REFRESH = 5 // default refresh interval in seconds

func usage(code int) {
fmt.Printf(
`rtop %s - (c) 2015 RapidLoop - MIT Licensed - http://rtop-monitor.org
`rtop %s - (c) 2015 RapidLoop - MIT Licensed - http://rtop-monitor.org
rtop monitors server statistics over an ssh connection

Usage: rtop [-i private-key-file] [user@]host[:port] [interval]
Expand Down Expand Up @@ -144,6 +144,21 @@ func parseCmdLine() (key, username, addr string, interval time.Duration) {
return
}

//rtop only support for Linux system
func validateOS(client *ssh.Client) {
ostype, err := runCommand(client, "uname")
if err != nil {
os.Exit(1)
}
//remove newline character
ostype = strings.Trim(ostype, "\n")

if !strings.EqualFold(ostype, "Linux") {
fmt.Println("\nrtop not support for ", ostype, "system\n")
os.Exit(1)
}
}

//----------------------------------------------------------------------------

func main() {
Expand All @@ -154,6 +169,7 @@ func main() {
keyPath, username, addr, interval := parseCmdLine()

client := sshConnect(username, addr, keyPath)
validateOS(client)

// the loop
showStats(client)
Expand All @@ -177,7 +193,7 @@ func showStats(client *ssh.Client) {
getAllStats(client, &stats)
used := stats.MemTotal - stats.MemFree - stats.MemBuffers - stats.MemCached
fmt.Printf(
`%s%s%s%s up %s%s%s
`%s%s%s%s up %s%s%s

Load:
%s%s %s %s%s
Expand Down