Commit 236bdb88 authored by Bhaskar Chowdhury's avatar Bhaskar Chowdhury Committed by Boqun Feng
Browse files

tools: rcu: Add usage function and check for argument 



This commit converts extract-stall.sh script's header comment to a
usage() function, and adds an argument check.  While in the area, make
this script be executable.

[ paulmck: Strength argument check, remove extraneous comment. ]

Signed-off-by: default avatarBhaskar Chowdhury <unixbhaskar@gmail.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
Signed-off-by: default avatarBoqun Feng <boqun.feng@gmail.com>
parent 7c3a8b48

tools/rcu/extract-stall.sh

100644 → 100755
+20 −6
Original line number Diff line number Diff line 
#!/bin/sh

# SPDX-License-Identifier: GPL-2.0+

#

# Extract any RCU CPU stall warnings present in specified file.

# Filter out clocksource lines.  Note that preceding-lines excludes the

# initial line of the stall warning but trailing-lines includes it.

#

# Usage: extract-stall.sh dmesg-file [ preceding-lines [ trailing-lines ] ]



usage() {

	echo Extract any RCU CPU stall warnings present in specified file.

	echo Filter out clocksource lines.  Note that preceding-lines excludes the

	echo initial line of the stall warning but trailing-lines includes it.

	echo

	echo Usage: $(basename $0) dmesg-file [ preceding-lines [ trailing-lines ] ]

	echo

	echo Error: $1

}



# Terminate the script, if the argument is missing



if test -f "$1" && test -r "$1"

then

	:

else

	usage "Console log file \"$1\" missing or unreadable."

	exit 1

fi



echo $1

preceding_lines="${2-3}"