+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
package main
import (
"bufio"
"flag"
+ "fmt"
"io"
"log"
"os"
"syscall"
"time"
- "git.curoverse.com/arvados.git/lib/crunchstat"
+ "git.arvados.org/arvados.git/lib/cmd"
+ "git.arvados.org/arvados.git/lib/crunchstat"
)
const MaxLogLine = 1 << 14 // Child stderr lines >16KiB will be split
var (
signalOnDeadPPID int = 15
ppidCheckInterval = time.Second
+ version = "dev"
)
func main() {
Logger: log.New(os.Stderr, "crunchstat: ", 0),
}
- flag.StringVar(&reporter.CgroupRoot, "cgroup-root", "", "Root of cgroup tree")
- flag.StringVar(&reporter.CgroupParent, "cgroup-parent", "", "Name of container parent under cgroup")
- flag.StringVar(&reporter.CIDFile, "cgroup-cid", "", "Path to container id file")
- flag.IntVar(&signalOnDeadPPID, "signal-on-dead-ppid", signalOnDeadPPID, "Signal to send child if crunchstat's parent process disappears (0 to disable)")
- flag.DurationVar(&ppidCheckInterval, "ppid-check-interval", ppidCheckInterval, "Time between checks for parent process disappearance")
- pollMsec := flag.Int64("poll", 1000, "Reporting interval, in milliseconds")
+ flags := flag.NewFlagSet(os.Args[0], flag.ExitOnError)
+ flags.StringVar(&reporter.CgroupRoot, "cgroup-root", "", "Root of cgroup tree")
+ flags.StringVar(&reporter.CgroupParent, "cgroup-parent", "", "Name of container parent under cgroup")
+ flags.StringVar(&reporter.CIDFile, "cgroup-cid", "", "Path to container id file")
+ flags.IntVar(&signalOnDeadPPID, "signal-on-dead-ppid", signalOnDeadPPID, "Signal to send child if crunchstat's parent process disappears (0 to disable)")
+ flags.DurationVar(&ppidCheckInterval, "ppid-check-interval", ppidCheckInterval, "Time between checks for parent process disappearance")
+ pollMsec := flags.Int64("poll", 1000, "Reporting interval, in milliseconds")
+ getVersion := flags.Bool("version", false, "Print version information and exit.")
+
+ if ok, code := cmd.ParseFlags(flags, os.Args[0], os.Args[1:], "program [args ...]", os.Stderr); !ok {
+ os.Exit(code)
+ } else if *getVersion {
+ fmt.Printf("crunchstat %s\n", version)
+ return
+ } else if flags.NArg() == 0 {
+ fmt.Fprintf(os.Stderr, "missing required argument: program (try -help)\n")
+ os.Exit(2)
+ }
- flag.Parse()
+ reporter.Logger.Printf("crunchstat %s started", version)
if reporter.CgroupRoot == "" {
reporter.Logger.Fatal("error: must provide -cgroup-root")
reporter.PollPeriod = time.Duration(*pollMsec) * time.Millisecond
reporter.Start()
- err := runCommand(flag.Args(), reporter.Logger)
+ err := runCommand(flags.Args(), reporter.Logger)
reporter.Stop()
if err, ok := err.(*exec.ExitError); ok {
}
// Funnel stderr through our channel
- stderr_pipe, err := cmd.StderrPipe()
+ stderrPipe, err := cmd.StderrPipe()
if err != nil {
logger.Fatalln("error in StderrPipe:", err)
}
os.Stdin.Close()
os.Stdout.Close()
- copyPipeToChildLog(stderr_pipe, log.New(os.Stderr, "", 0))
+ copyPipeToChildLog(stderrPipe, log.New(os.Stderr, "", 0))
return cmd.Wait()
}
func sendSignalOnDeadPPID(intvl time.Duration, signum, ppidOrig int, cmd *exec.Cmd, logger *log.Logger) {
ticker := time.NewTicker(intvl)
- for _ = range ticker.C {
+ for range ticker.C {
ppid := os.Getppid()
if ppid == ppidOrig {
continue