[PATCH 20/22] ver_linux: use 'udevadm', instead of 'udevinfo'

[Alexander Kapshuk]

'udevinfo' no longer seems to be available across various
distros. 'udevadm' seems to be the currently valid way to look up the
'udev' version.

Tested on:
Gentoo Linux
Debian 6.0.10
Oracle Linux Server release 7.1

Rely on regex to find the version number, rather than rely on numerical input to be found in a particular input field.
Proposed implementation also eliminates the necessity to invoke 'grep' + 'awk'.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@xxxxxxxxx>
---
 scripts/ver_linux | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scripts/ver_linux b/scripts/ver_linux
index 1c6ec22..f839be3 100755
--- a/scripts/ver_linux
+++ b/scripts/ver_linux
@@ -164,7 +164,12 @@ awk '/^expr/{
 	substr($0,RSTART,RLENGTH))
 }'
 
-udevinfo -V 2>&1 | grep version | awk '{print "udev                  ", $3}'
+udevadm --version 2>&1 |
+awk '/[0-9]+([.]?[0-9]+)+/ && !/not found$/{
+	match($0, /[0-9]+([.]?[0-9]+)+/)
+	printf("Udev\t\t\t%s\n",
+	substr($0,RSTART,RLENGTH))
+}'
 
 iwconfig --version 2>&1 | awk \
 '(NR==1 && ($3 == "version")) {print "wireless-tools        ",$4}'
-- 
2.4.9

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