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62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
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package pipeline
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import (
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"os"
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"syscall"
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"unsafe"
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)
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// ForceLog should rarely be used. It forceable logs an entry to the
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// Windows Event Log (on Windows) or to the SysLog (on Linux)
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func ForceLog(level LogLevel, msg string) {
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var el eventType
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switch level {
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case LogError, LogFatal, LogPanic:
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el = elError
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case LogWarning:
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el = elWarning
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case LogInfo:
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el = elInfo
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}
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// We are logging it, ensure trailing newline
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if len(msg) == 0 || msg[len(msg)-1] != '\n' {
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msg += "\n" // Ensure trailing newline
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}
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reportEvent(el, 0, msg)
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}
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type eventType int16
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const (
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elSuccess eventType = 0
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elError eventType = 1
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elWarning eventType = 2
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elInfo eventType = 4
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)
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var reportEvent = func() func(eventType eventType, eventID int32, msg string) {
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advAPI32 := syscall.MustLoadDLL("AdvAPI32.dll")
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registerEventSource := advAPI32.MustFindProc("RegisterEventSourceW")
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sourceName, _ := os.Executable()
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sourceNameUTF16, _ := syscall.UTF16PtrFromString(sourceName)
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handle, _, lastErr := registerEventSource.Call(uintptr(0), uintptr(unsafe.Pointer(sourceNameUTF16)))
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if lastErr == nil { // On error, logging is a no-op
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return func(eventType eventType, eventID int32, msg string) {}
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}
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reportEvent := advAPI32.MustFindProc("ReportEventW")
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return func(eventType eventType, eventID int32, msg string) {
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s, _ := syscall.UTF16PtrFromString(msg)
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_, _, _ = reportEvent.Call(
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uintptr(handle), // HANDLE hEventLog
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uintptr(eventType), // WORD wType
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uintptr(0), // WORD wCategory
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uintptr(eventID), // DWORD dwEventID
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uintptr(0), // PSID lpUserSid
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uintptr(1), // WORD wNumStrings
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uintptr(0), // DWORD dwDataSize
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uintptr(unsafe.Pointer(&s)), // LPCTSTR *lpStrings
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uintptr(0)) // LPVOID lpRawData
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}
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}()
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