git/compat/win32/syslog.c

#include "../../git-compat-util.h"
#include "../../strbuf.h"

static HANDLE ms_eventlog;

void openlog(const char *ident, int logopt, int facility)
{
	if (ms_eventlog)
		return;

	ms_eventlog = RegisterEventSourceA(NULL, ident);

	if (!ms_eventlog)
		warning("RegisterEventSource() failed: %lu", GetLastError());
}

void syslog(int priority, const char *fmt, ...)
{
	struct strbuf sb = STRBUF_INIT;
	struct strbuf_expand_dict_entry dict[] = {
		{"1", "% 1"},
		{NULL, NULL}
	};
	WORD logtype;
	char *str;
	int str_len;
	va_list ap;

	if (!ms_eventlog)
		return;

	va_start(ap, fmt);
	str_len = vsnprintf(NULL, 0, fmt, ap);
	va_end(ap);

	if (str_len < 0) {
		warning("vsnprintf failed: '%s'", strerror(errno));
		return;
	}

	str = malloc(str_len + 1);
	va_start(ap, fmt);
	vsnprintf(str, str_len + 1, fmt, ap);
	va_end(ap);
	strbuf_expand(&sb, str, strbuf_expand_dict_cb, &dict);
	free(str);

	switch (priority) {
	case LOG_EMERG:
	case LOG_ALERT:
	case LOG_CRIT:
	case LOG_ERR:
		logtype = EVENTLOG_ERROR_TYPE;
		break;

	case LOG_WARNING:
		logtype = EVENTLOG_WARNING_TYPE;
		break;

	case LOG_NOTICE:
	case LOG_INFO:
	case LOG_DEBUG:
	default:
		logtype = EVENTLOG_INFORMATION_TYPE;
		break;
	}

	ReportEventA(ms_eventlog, logtype, 0, 0, NULL, 1, 0,
	    (const char **)&sb.buf, NULL);

	strbuf_release(&sb);
}