ver_linux: libc, input redirection to sed fails in some distros

The current implementation has been found not to work across all distros.

The proposed implementation relies on 'sed' to both output the string
'Linux C Library' as well as to open '/proc/self/maps' without having
to use output redirection.

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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/scripts/ver_linux b/scripts/ver_linux
index af5ac824e483906bf16e1f6510161199fa515340..909d039284f82f883180db2b0681a0ceffa8d371 100755 (executable)
--- a/scripts/ver_linux
+++ b/scripts/ver_linux
@@ -107,8 +107,12 @@ isdnctrl 2>&1 | grep version | awk \
 showmount --version 2>&1 | grep nfs-utils | awk \
 'NR==1{print "nfs-utils             ", $NF}'
 
-echo -n "Linux C Library        "
-sed -n -e '/^.*\/libc-\([^/]*\)\.so$/{s//\1/;p;q}' < /proc/self/maps
+test -r /proc/self/maps &&
+sed '
+       /.*libc-\(.*\)\.so$/!d
+       s//Linux C Library\t\t\1/
+       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}'