firehol/netdata

// SPDX-License-Identifier: GPL-3.0-or-later

//go:build linux

package logger

import (
    "os"
    "strconv"
    "strings"
    "syscall"
)

func isStderrConnectedToJournal() bool {
    stream := os.Getenv("JOURNAL_STREAM")
    if stream == "" {
        return false
    }

    idx := strings.IndexByte(stream, ':')
    if idx <= 0 {
        return false
    }

    dev, ino := stream[:idx], stream[idx+1:]

    var stat syscall.Stat_t
    if err := syscall.Fstat(int(os.Stderr.Fd()), &stat); err != nil {
        return false
    }

    return dev == strconv.Itoa(int(stat.Dev)) && ino == strconv.FormatUint(stat.Ino, 10)
}