From b9b7447f93129aef5e0583c62550626f9b70b985 Mon Sep 17 00:00:00 2001
From: phk <phk@d4fa192b-c00b-0410-8231-f00ffab90ce4>
Date: Thu, 16 Mar 2006 10:46:01 +0000
Subject: [PATCH] Functions to handle the CLI with event(3)'s buffer events.

This may eventually belong in a library for wider use.


git-svn-id: svn+ssh://projects.linpro.no/svn/varnish/trunk@55 d4fa192b-c00b-0410-8231-f00ffab90ce4
---
 varnish-cache/bin/varnishd/cli_event.c | 139 +++++++++++++++++++++++++
 varnish-cache/bin/varnishd/cli_event.h |  14 +++
 2 files changed, 153 insertions(+)
 create mode 100644 varnish-cache/bin/varnishd/cli_event.c
 create mode 100644 varnish-cache/bin/varnishd/cli_event.h

diff --git a/varnish-cache/bin/varnishd/cli_event.c b/varnish-cache/bin/varnishd/cli_event.c
new file mode 100644
index 00000000..10e5fd17
--- /dev/null
+++ b/varnish-cache/bin/varnishd/cli_event.c
@@ -0,0 +1,139 @@
+/*
+ * $Id$
+ */
+
+#include <errno.h>
+#include <assert.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+
+#include <sys/wait.h>
+
+#include <event.h>
+#include <sbuf.h>
+
+#include <cli.h>
+#include <cli_priv.h>
+#include <libvarnish.h>
+
+#include "heritage.h"
+#include "cli_event.h"
+
+void
+cli_out(struct cli *cli, const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	sbuf_vprintf(cli->sb, fmt, ap);
+	va_end(ap);
+}
+
+void
+cli_param(struct cli *cli)
+{
+
+	cli->result = CLIS_PARAM;
+	cli_out(cli, "Parameter error, use \"help [command]\" for more info.\n");
+}
+
+void
+cli_result(struct cli *cli, unsigned res)
+{
+
+	cli->result = res;
+}
+
+static void
+encode_output(struct cli *cli)
+{
+	const char *p, *q;
+
+	if (cli->verbose) {
+		if (cli->result != CLIS_OK)
+			evbuffer_add_printf(cli->bev1->output, "ERROR %d ",
+			    cli->result);
+		evbuffer_add(cli->bev1->output,
+		    sbuf_data(cli->sb), sbuf_len(cli->sb));
+		if (cli->result == CLIS_OK)
+			evbuffer_add_printf(cli->bev1->output, "OK\n");
+		return;
+	}
+	evbuffer_add_printf(cli->bev1->output, "%d \"", cli->result);
+	for (p = q = sbuf_data(cli->sb); *p != '\0'; p++) {
+		if (*p != '"' && *p != '\\' && isgraph(*p) || *p == ' ')
+			continue;
+		if (p != q) 
+			evbuffer_add(cli->bev1->output, q, p - q);
+		if (*p == '\n')
+			evbuffer_add_printf(cli->bev1->output, "\\n");
+		else
+			evbuffer_add_printf(cli->bev1->output, "\\x%02x", *p);
+		q = p + 1;
+	}
+	if (p != q) 
+		evbuffer_add(cli->bev1->output, q, p - q);
+	evbuffer_add_printf(cli->bev1->output, "\"\n");
+}
+
+static void
+rdcb(struct bufferevent *bev, void *arg)
+{
+	const char *p;
+	char **av;
+	struct cli *cli = arg;
+	unsigned u;
+	struct cli_proto *cp;
+
+	p = evbuffer_readline(bev->input);
+	if (p == NULL)
+		return;
+	sbuf_clear(cli->sb);
+	cli_dispatch(cli, cli->cli_proto, p);
+	sbuf_finish(cli->sb);
+	/* XXX: syslog results ? */
+	encode_output(cli);
+	bufferevent_enable(cli->bev1, EV_WRITE);
+}
+
+static void
+wrcb(struct bufferevent *bev, void *arg)
+{
+	struct cli *cli = arg;
+
+	bufferevent_disable(cli->bev1, EV_WRITE);
+}
+
+static void
+excb(struct bufferevent *bev, short what, void *arg)
+{
+	printf("Exception\n");
+}
+
+struct cli *
+cli_setup(int fdr, int fdw, int ver, struct cli_proto *cli_proto)
+{
+	struct cli	*cli;
+
+	cli = calloc(sizeof *cli, 1);
+	assert(cli != NULL);
+
+	cli->bev0 = bufferevent_new(fdr, rdcb, wrcb, excb, cli);
+	assert(cli->bev0 != NULL);
+	if (fdr == fdw)
+		cli->bev1 = cli->bev0;
+	else 
+		cli->bev1 = bufferevent_new(fdw, rdcb, wrcb, excb, cli);
+	assert(cli->bev1 != NULL);
+	cli->sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
+	assert(cli->sb != NULL);
+
+	cli->verbose = ver;
+	cli->cli_proto = cli_proto;
+	
+	bufferevent_enable(cli->bev0, EV_READ);
+	return (cli);
+}
diff --git a/varnish-cache/bin/varnishd/cli_event.h b/varnish-cache/bin/varnishd/cli_event.h
new file mode 100644
index 00000000..4e17cd97
--- /dev/null
+++ b/varnish-cache/bin/varnishd/cli_event.h
@@ -0,0 +1,14 @@
+/*
+ * $Id$
+ */
+
+struct cli {
+	struct bufferevent	*bev0, *bev1;
+	struct sbuf		*sb;
+	unsigned		verbose;
+	enum cli_status_e	result;
+	struct cli_proto	*cli_proto;
+};
+
+struct cli *cli_setup(int fdr, int fdw, int ver, struct cli_proto *cli_proto);
+
-- 
2.39.5