linux-kernel - [PATCH] ver

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Date:	Thu, 1 Oct 2015 21:34:23 +0300
From:	Alexander Kapshuk <alexander.kapshuk@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>
Subject: [PATCH] ver_linux: ldd.patch

Not to be critical of anyone, I believe that using 'head' along with
'awk' in this kind of context as a one-off quick solution to be run on
the command line may very well be justified.
However, in a script, 'awk' or 'sed' alone are more than capable of doing
most of the things we may be looking to achieve by using a combination of
'head', and 'awk'.

The proposed implementation relies on 'sed' to perform all the text
processing required.

Tested on:
Gentoo Linux
Debian 6.0.10
Oracle Linux Server release 7.1
Arch Linux
openSuSE 13.2

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@...il.com>
---

--- linux/scripts/ver_linux.orig    2015-08-30 21:34:09.000000000 +0300
+++ linux/scripts/ver_linux    2015-09-30 22:53:42.750469252 +0300
@@ -62,8 +62,17 @@
 echo -n "Linux C Library        "
 sed -n -e '/^.*\/libc-\([^/]*\)\.so$/{s//\1/;p;q}' < /proc/self/maps

-ldd -v > /dev/null 2>&1 && ldd -v || ldd --version |head -n 1 | awk \
-'NR==1{print "Dynamic linker (ldd)  ", $NF}'
+lddsed='
+    /^ldd/!d
+    s/.*[ \t]\([0-9\.]*$\)/\1/
+    s/^/Dynamic linker (ldd)\t/
+'
+if ldd -v >/dev/null 2>&1
+then
+    ldd -v 2>&1 | sed "$lddsed"
+else
+    ldd --version 2>&1 | sed "$lddsed"
+fi

 ls -l /usr/lib/libg++.so /usr/lib/libstdc++.so  2>/dev/null | awk -F. \
        '{print "Linux C++ Library      " $4"."$5"."$6}'
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