From eb9cb8b758bc88e9117fd0726646a7c9ae4f7984 Mon Sep 17 00:00:00 2001
From: David Goulet <david.goulet@polymtl.ca>
Date: Sat, 16 Jul 2011 15:51:11 -0400
Subject: [PATCH] Add version command

Signed-off-by: David Goulet <david.goulet@polymtl.ca>
---
 lttng/Makefile.am        |  3 +-
 lttng/cmd.h              |  1 +
 lttng/commands/version.c | 83 ++++++++++++++++++++++++++++++++++++++++
 lttng/lttng.c            |  1 +
 4 files changed, 87 insertions(+), 1 deletion(-)
 create mode 100644 lttng/commands/version.c

diff --git a/lttng/Makefile.am b/lttng/Makefile.am
index 6aefbae31..45c1e8885 100644
--- a/lttng/Makefile.am
+++ b/lttng/Makefile.am
@@ -7,7 +7,8 @@ lttng_SOURCES = conf.c commands/start.c commands/add_channel.c \
 				commands/stop.c commands/enable_events.c \
 				commands/disable_events.c commands/enable_channels.c \
 				commands/disable_channels.c commands/add_context.c \
-				commands/set_session.c utils.c lttng.c
+				commands/set_session.c commands/version.c \
+				utils.c lttng.c
 
 lttng_LDADD = \
 		$(top_builddir)/liblttngctl/liblttngctl.la
diff --git a/lttng/cmd.h b/lttng/cmd.h
index e882be245..c81eb5f6a 100644
--- a/lttng/cmd.h
+++ b/lttng/cmd.h
@@ -49,5 +49,6 @@ extern int cmd_enable_channels(int argc, const char **argv);
 extern int cmd_disable_channels(int argc, const char **argv);
 extern int cmd_add_context(int argc, const char **argv);
 extern int cmd_set_session(int argc, const char **argv);
+extern int cmd_version(int argc, const char **argv);
 
 #endif /* _LTTNG_CMD_H */
diff --git a/lttng/commands/version.c b/lttng/commands/version.c
new file mode 100644
index 000000000..d18afeb2b
--- /dev/null
+++ b/lttng/commands/version.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#define _GNU_SOURCE
+#include <popt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "cmd.h"
+#include "conf.h"
+#include "utils.h"
+
+enum {
+	OPT_HELP = 1,
+};
+
+static struct poptOption long_options[] = {
+	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
+	{"help",      'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
+	{0, 0, 0, 0, 0, 0, 0}
+};
+
+/*
+ * usage
+ */
+static void usage(FILE *ofp)
+{
+	fprintf(ofp, "usage: lttng version\n");
+	fprintf(ofp, "\n");
+	fprintf(ofp, "  -h, --help               Show this help\n");
+	fprintf(ofp, "\n");
+}
+
+/*
+ *  cmd_version
+ */
+int cmd_version(int argc, const char **argv)
+{
+	int opt, ret = CMD_SUCCESS;
+	static poptContext pc;
+
+	pc = poptGetContext(NULL, argc, argv, long_options, 0);
+	poptReadDefaultConfig(pc, 0);
+
+	while ((opt = poptGetNextOpt(pc)) != -1) {
+		switch (opt) {
+		case OPT_HELP:
+			usage(stderr);
+			ret = CMD_SUCCESS;
+			goto end;
+		default:
+			usage(stderr);
+			ret = CMD_UNDEFINED;
+			goto end;
+		}
+	}
+
+	MSG("lttng version " VERSION);
+	MSG("Web site: http://lttng.org/");
+	MSG("\nlttng is free software and under the GPL license.");
+
+end:
+	return ret;
+}
diff --git a/lttng/lttng.c b/lttng/lttng.c
index e6e657cc1..7c0abfaf2 100644
--- a/lttng/lttng.c
+++ b/lttng/lttng.c
@@ -72,6 +72,7 @@ static struct cmd_struct commands[] =  {
 	{ "disable-channel", cmd_disable_channels},
 	{ "add-context", cmd_add_context},
 	{ "set-session", cmd_set_session},
+	{ "version", cmd_version},
 	{ NULL, NULL}	/* Array closure */
 };
 
-- 
2.34.1