1 files changed, 36 insertions, 0 deletions
diff --git a/log.c b/log.c
new file mode 100644
index 0000000..c543238
--- /dev/null
+++ b/log.c
@@ -0,0 +1,36 @@
+#define _POSIX_C_SOURCE 200112L
+
+#include <time.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "log.h"
+
+static int save;
+static time_t now;
+static struct tm *tm;
+static char buf[25];		/* "2011-10-08T07:07:09+1111" */
+static va_list ap;
+static enum loglevel def_loglevel = LOG_DEBUG;
+
+void
+logmsg(enum loglevel level, const char *format,...)
+{
+	if (def_loglevel < level) {
+		return;
+	}
+	save = errno;
+
+	time(&now);
+	tm = localtime(&now);
+	strftime(buf, sizeof buf, "%FT%T%z", tm);
+
+	printf("%s ", buf);
+	va_start(ap, format);
+	vprintf(format, ap);
+	va_end(ap);
+	printf("\n");
+
+	errno = save;
+}