hid: port logging facilities

Though the regular mode now has timestamps and a new mode for systemd
has been added.
This commit is contained in:
Přemysl Eric Janouch 2018-08-06 14:12:45 +02:00
parent 5a40d7c2ed
commit bb0113021a
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 99 additions and 0 deletions

View File

@ -28,6 +28,7 @@ import (
"io" "io"
"io/ioutil" "io/ioutil"
"log" "log"
"log/syslog"
"net" "net"
"os" "os"
"os/signal" "os/signal"
@ -48,6 +49,100 @@ const (
projectVersion = "0" projectVersion = "0"
) )
// --- Logging -----------------------------------------------------------------
type logPrio int
const (
prioFatal logPrio = iota
prioError
prioWarning
prioStatus
prioDebug
)
func (lp logPrio) prefix() string {
switch lp {
case prioFatal:
return "fatal: "
case prioError:
return "error: "
case prioWarning:
return "warning: "
case prioStatus:
return ""
case prioDebug:
return "debug: "
default:
panic("unhandled log priority")
}
}
func (lp logPrio) syslogPrio() syslog.Priority {
switch lp {
case prioFatal:
return syslog.LOG_ERR
case prioError:
return syslog.LOG_ERR
case prioWarning:
return syslog.LOG_WARNING
case prioStatus:
return syslog.LOG_INFO
case prioDebug:
return syslog.LOG_DEBUG
default:
panic("unhandled log priority")
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
func logMessageStdio(prio logPrio, format string, args ...interface{}) {
// TODO: isatty-enabled colors based on prio.
os.Stderr.WriteString(time.Now().Format("2006-01-02 15:04:05 ") +
prio.prefix() + fmt.Sprintf(format, args...) + "\n")
}
func logMessageSystemd(prio logPrio, format string, args ...interface{}) {
if prio == prioFatal {
// There is no corresponding syslog severity.
format = "fatal: " + format
}
fmt.Fprintf(os.Stderr, "<%d>%s\n",
prio.syslogPrio(), fmt.Sprintf(format, args...))
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
var logMessage = logMessageStdio
func printDebug(format string, args ...interface{}) {
if debugMode {
logMessage(prioDebug, format, args...)
}
}
func printStatus(format string, args ...interface{}) {
logMessage(prioStatus, format, args...)
}
func printWarning(format string, args ...interface{}) {
logMessage(prioWarning, format, args...)
}
func printError(format string, args ...interface{}) {
logMessage(prioError, format, args...)
}
// "fatal" is reserved for failures that would harm further operation.
func printFatal(format string, args ...interface{}) {
logMessage(prioFatal, format, args...)
}
func exitFatal(format string, args ...interface{}) {
printFatal(format, args...)
os.Exit(1)
}
// --- Utilities --------------------------------------------------------------- // --- Utilities ---------------------------------------------------------------
// Split a string by a set of UTF-8 delimiters, optionally ignoring empty items. // Split a string by a set of UTF-8 delimiters, optionally ignoring empty items.
@ -3316,6 +3411,7 @@ func main() {
version := flag.Bool("version", false, "show version and exit") version := flag.Bool("version", false, "show version and exit")
writeDefaultCfg := flag.Bool("writedefaultcfg", false, writeDefaultCfg := flag.Bool("writedefaultcfg", false,
"write a default configuration file and exit") "write a default configuration file and exit")
systemd := flag.Bool("systemd", false, "log in systemd format")
flag.Parse() flag.Parse()
@ -3327,6 +3423,9 @@ func main() {
callSimpleConfigWriteDefault("", configTable) callSimpleConfigWriteDefault("", configTable)
return return
} }
if *systemd {
logMessage = logMessageSystemd
}
if flag.NArg() > 0 { if flag.NArg() > 0 {
flag.Usage() flag.Usage()
os.Exit(2) os.Exit(2)