![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/src/tools/sysdb/json.c b/src/tools/sysdb/json.c
--- /dev/null
+++ b/src/tools/sysdb/json.c
@@ -0,0 +1,159 @@
+/*
+ * SysDB - src/tools/sysdb/json.c
+ * Copyright (C) 2016 Sebastian 'tokkee' Harl <sh@tokkee.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include "sysdb.h"
+
+#include "utils/error.h"
+#include "utils/strbuf.h"
+#include "tools/sysdb/json.h"
+
+#include <yajl/yajl_parse.h>
+#include <yajl/yajl_gen.h>
+
+#include <unistd.h>
+#include <stdio.h>
+
+#ifdef HAVE_LIBYAJL
+
+/*
+ * YAJL callbacks
+ */
+
+#define GEN(obj) ((yajl_gen)(obj))
+#define OK(cb) ((cb) == yajl_gen_status_ok)
+
+static int
+gen_null(void *ctx) { return OK(yajl_gen_null(GEN(ctx))); }
+
+static int
+gen_boolean(void *ctx, int v) { return OK(yajl_gen_bool(GEN(ctx), v)); }
+
+static int
+gen_number(void *ctx, const char *v, size_t l)
+{
+ return OK(yajl_gen_number(GEN(ctx), v, l));
+}
+
+static int
+gen_string(void *ctx, const unsigned char *v, size_t l)
+{
+ return OK(yajl_gen_string(GEN(ctx), v, l));
+}
+
+static int
+gen_start_map(void *ctx) { return OK(yajl_gen_map_open(GEN(ctx))); }
+
+static int
+gen_end_map(void *ctx) { return OK(yajl_gen_map_close(GEN(ctx))); }
+
+static int
+gen_start_array(void *ctx) { return OK(yajl_gen_array_open(GEN(ctx))); }
+
+static int
+gen_end_array(void *ctx) { return OK(yajl_gen_array_close(GEN(ctx))); }
+
+static yajl_callbacks reformatters = {
+ gen_null,
+ gen_boolean,
+ NULL, /* gen_integer; */
+ NULL, /* gen_doube; both default to gen_number */
+ gen_number,
+ gen_string,
+ gen_start_map,
+ gen_string,
+ gen_end_map,
+ gen_start_array,
+ gen_end_array,
+};
+
+static void
+printer(void __attribute__((unused)) *ctx, const char *str, size_t len)
+{
+ write(1, str, len);
+} /* printer */
+
+#endif /* HAVE_LIBYAJL */
+
+/*
+ * public API
+ */
+
+int
+sdb_json_print(sdb_strbuf_t *buf)
+{
+#ifdef HAVE_LIBYAJL
+ const unsigned char *json;
+ size_t json_len;
+
+ yajl_handle h;
+ yajl_gen gen;
+ yajl_status status;
+
+ int ret = 0;
+
+ gen = yajl_gen_alloc(/* alloc_funcs */ NULL);
+ if (! gen)
+ return -1;
+
+ yajl_gen_config(gen, yajl_gen_beautify, 1);
+ yajl_gen_config(gen, yajl_gen_validate_utf8, 1);
+ yajl_gen_config(gen, yajl_gen_print_callback, printer, NULL);
+
+ h = yajl_alloc(&reformatters, /* alloc_funcs */ NULL, (void *)gen);
+ if (! h) {
+ yajl_gen_free(gen);
+ return -1;
+ }
+
+ json = (const unsigned char *)sdb_strbuf_string(buf);
+ json_len = sdb_strbuf_len(buf);
+ status = yajl_parse(h, json, json_len);
+ if (status == yajl_status_ok)
+ status = yajl_complete_parse(h);
+
+ if (status != yajl_status_ok) {
+ unsigned char *err = yajl_get_error(h, 1, json, json_len);
+ sdb_log(SDB_LOG_ERR, "%s", err);
+ yajl_free_error(h, err);
+ ret = -1;
+ }
+
+ yajl_gen_free(gen);
+ yajl_free(h);
+ return ret;
+#else /* HAVE_LIBYAJL */
+ printf("%s\n", sdb_strbuf_string(buf));
+ return 0;
+#endif /* HAVE_LIBYAJL */
+} /* sdb_json_print */
+
+/* vim: set tw=78 sw=4 ts=4 noexpandtab : */
+