[tip:perf/core] kprobetrace, doc: Shell needs single quote to use $ character

From: tip-bot for Motohiro KOSAKI
Date: Wed Jan 20 2010 - 02:14:40 EST

Commit-ID: 580d9e00fdfb85e65c5097dcd739c6efcdbadc96
Gitweb: http://git.kernel.org/tip/580d9e00fdfb85e65c5097dcd739c6efcdbadc96
Author: Motohiro KOSAKI <kosaki.motohiro@xxxxxxxxxxxxxx>
AuthorDate: Mon, 18 Jan 2010 21:35:05 -0500
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Wed, 20 Jan 2010 07:18:14 +0100

kprobetrace, doc: Shell needs single quote to use $ character

Shell interprets $val as shell variable, thus we need quote if
we use the echo command.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: systemtap <systemtap@xxxxxxxxxxxxxxxxxx>
Cc: DLE <dle-develop@xxxxxxxxxxxxxxxxxxxxx>
LKML-Reference: <20100119023505.31880.17367.stgit@xxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Documentation/trace/kprobetrace.txt | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/trace/kprobetrace.txt b/Documentation/trace/kprobetrace.txt
index f30978e..ab57f02 100644
--- a/Documentation/trace/kprobetrace.txt
+++ b/Documentation/trace/kprobetrace.txt
@@ -79,7 +79,7 @@ Usage examples
To add a probe as a new event, write a new definition to kprobe_events
as below.

- echo p:myprobe do_sys_open dfd=%ax filename=%dx flags=%cx mode=+4($stack) > /sys/kernel/debug/tracing/kprobe_events
+ echo 'p:myprobe do_sys_open dfd=%ax filename=%dx flags=%cx mode=+4($stack)' > /sys/kernel/debug/tracing/kprobe_events

This sets a kprobe on the top of do_sys_open() function with recording
1st to 4th arguments as "myprobe" event. Note, which register/stack entry is
@@ -88,7 +88,7 @@ the ABI, please try to use probe subcommand of perf-tools (you can find it
under tools/perf/).
As this example shows, users can choose more familiar names for each arguments.

- echo r:myretprobe do_sys_open $retval >> /sys/kernel/debug/tracing/kprobe_events
+ echo 'r:myretprobe do_sys_open $retval' >> /sys/kernel/debug/tracing/kprobe_events

This sets a kretprobe on the return point of do_sys_open() function with
recording return value as "myretprobe" event.
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