linux-kernel - [PATCH] trace-cmd: Search $TRACE_CMD_PLUGIN

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Message-Id: <1285718416-1470-1-git-send-email-dhsharp@google.com>
Date:	Tue, 28 Sep 2010 17:00:16 -0700
From:	David Sharp <dhsharp@...gle.com>
To:	rostedt@...dmis.org
Cc:	linux-kernel@...r.kernel.org, mrubin@...gle.com,
	David Sharp <dhsharp@...gle.com>
Subject: [PATCH] trace-cmd: Search $TRACE_CMD_PLUGIN_DIR for plugins.

Allows dynamic specification of the plugin directory so that plugins can be
used when the install prefix cannot be predicted, such as when using a
pre-compiled version of trace-cmd with Autotest.

Signed-off-by: David Sharp <dhsharp@...gle.com>
---
 trace-util.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/trace-util.c b/trace-util.c
index 33dbdf0..9e0ceca 100644
--- a/trace-util.c
+++ b/trace-util.c
@@ -771,6 +771,7 @@ void trace_util_load_plugins(struct pevent *pevent, const char *suffix,
 {
 	char *home;
 	char *path;
+        char *envdir;
 
 	if (tracecmd_disable_plugins)
 		return;
@@ -782,7 +783,12 @@ void trace_util_load_plugins(struct pevent *pevent, const char *suffix,
 					    load_plugin, data);
 #endif
 
-	/* Now let the home directory override the system defaults */
+	/* Next let the environment-set plugin directory override the system defaults */
+	envdir = getenv("TRACE_CMD_PLUGIN_DIR");
+	if (envdir)
+		trace_util_load_plugins_dir(pevent, suffix, envdir, load_plugin, data);
+
+	/* Now let the home directory override the environment or system defaults */
 	home = getenv("HOME");
 
 	if (!home)
-- 
1.7.1

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