1 files changed, 135 insertions, 0 deletions
diff --git a/src/logger.c b/src/logger.c
new file mode 100644
index 0000000..fe8de2f
--- /dev/null
+++ b/src/logger.c
@@ -0,0 +1,135 @@
+/* This file is part of Ping903.
+   Copyright (C) 2020 Sergey Poznyakoff
+
+   Ping903 is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   Ping903 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Ping903.  If not, see <http://www.gnu.org/licenses/>. */
+#include <config.h>
+#include <stdio.h>
+#include <string.h>
+#include <syslog.h>
+#include "ping903.h"
+
+char *progname;
+
+static int facility = LOG_DAEMON;
+
+static void
+vlog_syslog(int prio, char const *fmt, va_list ap)
+{
+	vsyslog(prio, fmt, ap);
+}
+
+static void
+vlog_stderr(int prio, char const *fmt, va_list ap)
+{
+	fprintf(stderr, "%s: ", progname);
+	vfprintf(stderr, fmt, ap);
+	fputc('\n', stderr);
+}
+
+static void (*vlog)(int prio, char const *fmt, va_list ap) = vlog_stderr;
+
+void
+vlogger(int prio, char const *fmt, va_list ap)
+{
+	vlog(prio, fmt, ap);
+}
+
+void
+fatal(char const *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vlog(LOG_CRIT, fmt, ap);
+	va_end(ap);
+}
+
+void
+error(char const *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vlog(LOG_ERR, fmt, ap);
+	va_end(ap);
+}
+
+void
+info(char const *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vlog(LOG_INFO, fmt, ap);
+	va_end(ap);
+}
+
+void
+syslog_enable(void)
+{
+	openlog(progname, LOG_PID, facility);
+	vlog = vlog_syslog;
+}
+
+static struct facility {
+	char const *s;
+	int n;
+} facilities[] = {
+	{ "auth", LOG_AUTH },
+	{ "authpriv", LOG_AUTHPRIV },
+	{ "cron", LOG_CRON },
+	{ "daemon", LOG_DAEMON },
+	{ "ftp", LOG_FTP },
+	{ "kern", LOG_KERN },
+	{ "lpr", LOG_LPR },
+	{ "mail", LOG_MAIL },
+	{ "news", LOG_NEWS },
+#ifdef LOG_AUTH
+	{ "security", LOG_AUTH },
+#endif
+	{ "syslog", LOG_SYSLOG },
+	{ "user", LOG_USER },
+	{ "uucp", LOG_UUCP },
+	{ "local0", LOG_LOCAL0 },
+	{ "local1", LOG_LOCAL1 },
+	{ "local2", LOG_LOCAL2 },
+	{ "local3", LOG_LOCAL3 },
+	{ "local4", LOG_LOCAL4 },
+	{ "local5", LOG_LOCAL5 },
+	{ "local6", LOG_LOCAL6 },
+	{ "local7", LOG_LOCAL7 },
+	{ NULL, -1 }
+};
+	  
+int
+set_log_facility(char const *arg)
+{
+	struct facility *f;
+	for (f = facilities; f->s; f++)
+		if (strcmp(f->s, arg) == 0)
+			break;
+	if (f->n == -1)
+		return -1;
+	facility = f->n;
+	return 0;
+}
+
+void
+set_progname(char const *arg)
+{
+	char *p = strrchr(arg, '/');
+	if (p)
+		p++;
+	else
+		p = (char*) arg;
+	progname = p;
+}
+