A simple monitoring solution written in Go (work in progress)
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package main
import (
"encoding/json"
"fmt"
"flag"
"os"
"strings"
)
func main() {
configPath := flag.String("config", "", "path to configuration file")
flag.Parse()
if *configPath == "" {
if _, err := os.Stat("./alrmrc"); err == nil {
*configPath = "./alrmrc"
}
if _, err := os.Stat("/etc/alrmrc"); err == nil {
*configPath = "/etc/alrmrc"
}
if *configPath == "" {
fmt.Fprintf(os.Stderr, "Cannot find configuration\n")
os.Exit(1)
}
}
config, err := ReadConfig(*configPath)
if err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
os.Exit(1)
}
command := strings.ToLower(flag.Arg(0))
switch command {
case "json":
o, err := json.MarshalIndent(config, "", " ")
if err != nil {
fmt.Fprintf(os.Stderr, "JSON error: %s\n", err.Error())
os.Exit(1)
}
fmt.Fprintf(os.Stdout, "%s", string(o))
case "", "config":
fmt.Fprintf(os.Stdout, "Config is OK.\n")
os.Exit(0)
default:
fmt.Fprintf(os.Stderr, "Unknown command: %s\n", command)
os.Exit(1)
}
}