xio: refactor fopencookie related functions

Again, we move them out of xio to shrink it down.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 51 insertions, 0 deletions

diff --git a/cookie.c b/cookie.c
new file mode 100644
index 0000000..9ee1ac6
--- /dev/null
+++ b/cookie.c
@@ -0,0 +1,51 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <syslog.h>
+
+#include "cookie.h"
+
+static char const *priov[] = {
+	[LOG_EMERG]	=	"EMERG:",
+	[LOG_ALERT]	=	"ALERT:",
+	[LOG_CRIT]	=	"CRIT:",
+	[LOG_ERR]	=	"ERR:",
+	[LOG_WARNING]	=	"WARNING:",
+	[LOG_NOTICE]	=	"NOTICE:",
+	[LOG_INFO]	=	"INFO:",
+	[LOG_DEBUG]	=	"DEBUG:",
+};
+
+static ssize_t cookie_writer(void *cookie, char const *data, size_t leng)
+{
+	int prio = LOG_DEBUG, len;
+
+	do {
+		len = strlen(priov[prio]);
+	} while (memcmp(data, priov[prio], len) && --prio >= 0);
+
+	if (prio < 0) {
+		prio = LOG_INFO;
+	} else {
+		data += len;
+		leng -= len;
+	}
+
+	while (*data == ' ') {
+		 ++data;
+		--leng;
+	}
+
+	syslog(prio, "%.*s", (int) leng, data);
+
+	return leng;
+}
+
+static cookie_io_functions_t cookie_log = {
+	.write		=	cookie_writer,
+};
+
+void to_std_log(FILE **fp)
+{
+	setvbuf(*fp = fopencookie(NULL, "w", cookie_log), NULL, _IOLBF, 0);
+}