1 files changed, 107 insertions, 0 deletions
diff --git a/libddekit/printf.c b/libddekit/printf.c
new file mode 100644
index 00000000..c4a8b718
--- /dev/null
+++ b/libddekit/printf.c
@@ -0,0 +1,107 @@
+/*
+ * \brief   Logging facility with printf()-like interface
+ * \author  Thomas Friebel <yaron@yaron.de>
+ * \date    2006-03-01
+ */
+
+#include <error.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <mach.h>
+#include <execinfo.h>
+
+#include "ddekit/printf.h"
+
+extern boolean_t using_std;
+static FILE *output;
+
+/**
+ * Log constant string message w/o arguments
+ *
+ * \param msg  message to be logged
+ */
+int ddekit_print(const char *msg)
+{
+	int ret;
+
+	/* If LOG hasn't been initialized or failed its initialization,
+	 * return the error. */
+	if (output == NULL)
+		return -1;
+
+	ret = fprintf (output, "%s", msg);
+	if (ret > 0)
+		fflush (output);
+	return ret;
+}
+
+/**
+ * Log message with print()-like arguments
+ *
+ * \param fmt  format string followed by optional arguments
+ */
+int ddekit_printf(const char *fmt, ...)
+{
+	int res;
+	va_list va;
+
+	va_start(va, fmt);
+	res = ddekit_vprintf(fmt, va);
+	va_end(va);
+
+	return res;
+}
+
+/* Log message with vprintf()-like arguments
+ *
+ * \param fmt  format string
+ * \param va   variable argument list
+ */
+int ddekit_vprintf(const char *fmt, va_list va)
+{
+	char *tmp = NULL;
+	int ret;
+
+	ret = vasprintf (&tmp, fmt, va);
+	if (ret > 0) {
+		ret = ddekit_print (tmp);
+		free (tmp);
+	}
+	return ret;
+}
+
+int log_init ()
+{
+	if (using_std) {
+		output = stderr;
+	}
+	else {
+		char template[] = "/var/log/dde_log.XXXXXX";
+		int ret = mkstemp (template);
+		if (ret < 0) {
+			error (0, errno, "mkstemp");
+			return -1;
+		}
+
+		output = fopen (template, "a+");
+		if (!output) {
+			error (0, errno, "open %s", template);
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+void dump_stack()
+{
+#define NUM_TRACES 16
+	void *trace[NUM_TRACES];
+	int trace_size = 0;
+
+	fprintf (stderr, "dump the stack\n");
+	trace_size = backtrace(trace, NUM_TRACES);
+	backtrace_symbols_fd(trace, trace_size, 2);
+}