Move logging functions to a new file, log.c

Logging to file is going to add some further complexity that we don't
want to squeeze into util.c.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 26 insertions, 0 deletions

diff --git a/log.h b/log.h
new file mode 100644
index 0000000..70cad6f
--- /dev/null
+++ b/log.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: AGPL-3.0-or-later
+ * Copyright (c) 2022 Red Hat GmbH
+ * Author: Stefano Brivio <sbrivio@redhat.com>
+ */
+
+#ifndef LOG_H
+#define LOG_H
+
+void err(const char *format, ...);
+void warn(const char *format, ...);
+void info(const char *format, ...);
+void debug(const char *format, ...);
+
+extern int log_trace;
+void trace_init(int enable);
+#define trace(format, ...)						\
+	do {								\
+		if (log_trace)						\
+			debug(format, ##__VA_ARGS__);			\
+	} while (0)
+
+void __openlog(const char *ident, int option, int facility);
+void passt_vsyslog(int pri, const char *format, va_list ap);
+void __setlogmask(int mask);
+
+#endif /* LOG_H */