sysdb: If available, use YAJL to pretty-print JSON output.

diff --git a/configure.ac b/configure.ac
index c39c4af2fc726a3779b641954e054781a9d76430..c6710041cb5c631f50041f73f1e2f662b1dc7109 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -473,6 +473,17 @@ if test "x$with_libdbi" = "xyes"; then
 fi
 AM_CONDITIONAL([BUILD_WITH_LIBDBI], test "x$with_libdbi" = "xyes")
 
+AC_ARG_WITH([libyajl],
+               [AS_HELP_STRING([--with-liyajl], [libyajl support (default: auto)])],
+               [with_libyajl="$withval"],
+               [with_libyajl="yes"])
+if test "x$with_libyajl" = "xyes" || test "x$with_libyajl" = "xauto"; then
+       PKG_CHECK_MODULES([YAJL], [yajl], [have_libyajl="yes"], [have_libyajl="no"])
+fi
+if test "x$with_libyajl" = "xyes"; then
+       AC_DEFINE([HAVE_LIBYAJL], 1, [Define to 1 if you have the 'yajl' library.])
+fi
+
 dnl Required for mocking FILE related functions.
 orig_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -D_GNU_SOURCE"
@@ -730,6 +741,10 @@ librrd_info="$have_librrd"
 if test "x$have_librrd" = "xyes"; then
        librrd_info="yes (version `$PKG_CONFIG --modversion librrd`)"
 fi
+libyajl_info="$have_libyajl"
+if test "x$have_libyajl" = "xyes"; then
+       libyajl_info="yes (version `$PKG_CONFIG --modversion yajl`)"
+fi
 
 AC_MSG_RESULT()
 AC_MSG_RESULT([$PACKAGE_NAME has been configured successfully.])
@@ -760,6 +775,7 @@ AC_MSG_RESULT([    libedit:  . . . . . . . . . $libedit_info])
 AC_MSG_RESULT([    libopenssl: . . . . . . . . $openssl_info])
 AC_MSG_RESULT([    libreadline:  . . . . . . . $have_libreadline])
 AC_MSG_RESULT([    librrd: . . . . . . . . . . $librrd_info])
+AC_MSG_RESULT([    libyajl:  . . . . . . . . . $libyajl_info])
 AC_MSG_RESULT()
 AC_MSG_RESULT([  Backends:])
 AC_MSG_RESULT([    collectd::unixsock: . . . . $enable_collectd_unixsock])

diff --git a/src/Makefile.am b/src/Makefile.am
index 0a6c8b33ec13038582e99124c1b15d7bef95d7f1..a3a65fd7ecc27b4e3477a420de916e6554a261dc 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -135,12 +135,14 @@ libsysdb_scanner_la_CFLAGS = @COVERAGE_CFLAGS@ @PROFILING_CFLAGS@ \
 sysdb_SOURCES = tools/sysdb/main.c include/client/sysdb.h \
                tools/sysdb/command.c tools/sysdb/command.h \
                tools/sysdb/input.c tools/sysdb/input.h \
+               tools/sysdb/json.c tools/sysdb/json.h \
                core/object.c include/core/object.h \
                utils/llist.c include/utils/llist.h \
                utils/os.c include/utils/os.h
 sysdb_CFLAGS = -DBUILD_DATE="\"$$( date --utc '+%F %T' ) (UTC)\"" \
-               $(AM_CFLAGS) @READLINE_CFLAGS@
-sysdb_LDADD = libsysdb_scanner.la libsysdbclient.la @READLINE_LIBS@ -lm
+               $(AM_CFLAGS) @READLINE_CFLAGS@ @YAJL_CFLAGS@
+sysdb_LDADD = libsysdb_scanner.la libsysdbclient.la \
+               @READLINE_LIBS@ @YAJL_LIBS@ -lm
 endif
 
 sysdbd_SOURCES = tools/sysdbd/main.c include/sysdb.h \

diff --git a/src/tools/sysdb/command.c b/src/tools/sysdb/command.c
index c7ca310a086230268272b46dcb7c268733b106b8..4de2b44e4fc79245027a22c5c2932bd82b46f742 100644 (file)
--- a/src/tools/sysdb/command.c
+++ b/src/tools/sysdb/command.c
@@ -33,6 +33,7 @@
 
 #include "tools/sysdb/command.h"
 #include "tools/sysdb/input.h"
+#include "tools/sysdb/json.h"
 
 #include "frontend/proto.h"
 #include "utils/error.h"
@@ -89,7 +90,9 @@ data_printer(sdb_strbuf_t *buf)
        /* At the moment, we don't care about the result type. We simply print the
         * result without further parsing it. */
        sdb_strbuf_skip(buf, 0, sizeof(uint32_t));
-       printf("%s\n", sdb_strbuf_string(buf));
+       if (sdb_json_print(buf))
+               sdb_log(SDB_LOG_ERR, "Failed to print result");
+       printf("\n");
 } /* data_printer */
 
 static struct {

diff --git a/src/tools/sysdb/json.c b/src/tools/sysdb/json.c
new file mode 100644 (file)
index 0000000..703b22e
--- /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 : */
+

diff --git a/src/tools/sysdb/json.h b/src/tools/sysdb/json.h
new file mode 100644 (file)
index 0000000..9fc1a70
--- /dev/null
+++ b/src/tools/sysdb/json.h
@@ -0,0 +1,44 @@
+/*
+ * SysDB - src/tools/sysdb/json.h
+ * 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.
+ */
+
+#include "utils/strbuf.h"
+
+#ifndef SYSDB_JSON_H
+#define SYSDB_JSON_H 1
+
+/*
+ * sdb_json_print:
+ * Format the JSON string stored in the specified buffer. The output is
+ * printed to the standard output channel.
+ */
+int
+sdb_json_print(sdb_strbuf_t *buf);
+
+#endif /* SYSDB_JSON_H */
+
+/* vim: set tw=78 sw=4 ts=4 noexpandtab : */
+