Yes syslog is not available on Windows as that is a Posix API. All of your calls to syslog should be guarded by a version for Posix.

The Windows Event Log which is comparable, isn't 1:1 so its a bit of a task to replace it.

On 04/02/2023 6:55 AM, Alexander Zhirov wrote:
> On Friday, 3 February 2023 at 16:00:55 UTC, Richard (Rikki) Andrew Cattermole wrote:
>> Yes syslog is not available on Windows as that is a Posix API. All of your calls to syslog should be guarded by a version for Posix.
> 
> Is there an analogue for Windows? And is it possible to implement it with the similarity of directives, as in C?

The analogue is the Windows Event Log and its not 1:1.

Here is a starting point that I myself have used in the past:

https://github.com/php/php-src/blob/master/win32/wsyslog.c

On 05/02/2023 2:31 AM, Alexander Zhirov wrote:
> On Friday, 3 February 2023 at 18:02:59 UTC, Richard (Rikki) Andrew Cattermole wrote:
>> Here is a starting point that I myself have used in the past:
> 
> I understand that programming under Windows is a shame for a programmer, but is there really no ready-made solution for using the system log in Windows?

Not at all.

syslog is the system api for logging on Posix, event log is the Windows equivalent system api.

They are both good in their own ways, even if they are not 1:1.

I can't see anything on dub-registry or in Phobos. But its not hard to implement.

I.e. here are my functions for syslog and Windows Event log (I won't copy it all, it won't be helpful & the file log function is giant compared).

```d
            void syslog() {
                version (Posix) {
                    import core.sys.posix.syslog : syslog;

                    syslog(prioritySyslogForLevels[level], unsafeTextMessageComposite.ptr);
                }
            }

            void windowsEvents() {
                version (Windows) {
                    import core.sys.windows.windows : ReportEventA, WORD, DWORD, EVENTLOG_INFORMATION_TYPE,
                        EVENTLOG_WARNING_TYPE, EVENTLOG_ERROR_TYPE;

                    static WORD[] WTypes = [
                        EVENTLOG_INFORMATION_TYPE, EVENTLOG_INFORMATION_TYPE, EVENTLOG_WARNING_TYPE,
                        EVENTLOG_ERROR_TYPE, EVENTLOG_ERROR_TYPE, EVENTLOG_ERROR_TYPE
                    ];

                    static DWORD[] dwEventID = [0, 0, 0, 0, 0, 0];
                    const(char)*[2] messages = [
                        ModuleLine2.ptr,
                        cast(char*)unsafeTextMessageComposite.ptr + unsafeDateTime.length + ModuleLine.length
                    ];

                    ReportEventA(windowsEventHandle, WTypes[level], 0, dwEventID[level], cast(void*)null, 2, 0,
                            &messages[0], cast(void*)null);
                }
            }
```

Note: you also need to setup an event source on Windows i.e.

```d
import core.sys.windows.windows : RegisterEventSourceA;
windowsEventHandle = RegisterEventSourceA(null, cast(char*)processName.ptr);
```

and to close it:

```d
import core.sys.windows.windows : DeregisterEventSource;
DeregisterEventSource(windowsEventHandle);
```