linux-kernel - [PATCH 02/22] ver_linux: make --version, use regex to find version number

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Date:	Mon, 12 Oct 2015 21:39:42 +0300
From:	Alexander Kapshuk <alexander.kapshuk@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	gregkh@...uxfoundation.org, jim.epost@...il.com, richard@....at,
	tytso@....edu, Alexander Kapshuk <alexander.kapshuk@...il.com>
Subject: [PATCH 02/22] ver_linux: make --version, use regex to find version number

Rely on regex to find the version number, rather than a field number.
Reduce the number of 'awk' invocations from two to one.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@...il.com>
---
 scripts/ver_linux | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/scripts/ver_linux b/scripts/ver_linux
index af6467e..31c0e4d 100755
--- a/scripts/ver_linux
+++ b/scripts/ver_linux
@@ -18,8 +18,12 @@ awk '/[0-9]+([.]?[0-9]+)+/ && !/not found$/{
 	substr($0,RSTART,RLENGTH))
 }'
 
-make --version 2>&1 | awk -F, '{print $1}' | awk \
-      '/GNU Make/{print "Gnu make              ",$NF}'
+make --version 2>&1 |
+awk '/GNU Make/{
+	match($0, /[0-9]+([.]?[0-9]+)+/)
+	printf("GNU Make\t\t%s\n",
+	substr($0,RSTART,RLENGTH))
+}'
 
 echo "binutils               $(ld -v | egrep -o '[0-9]+\.[0-9\.]+')"
 
-- 
2.4.9

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