On 5/11/07, Andrew Sackville-West <[EMAIL PROTECTED]> wrote:
On Fri, May 11, 2007 at 03:00:41PM -0700, L.V.Gandhi wrote:
> Will you please explain the construct of /^[^D|+]/ in your
> dpkg -l udev hotplug linux-image-\* | awk '/^[^D|+]/{print $1,$2,$3}'
I've wondered about that too. In fact, I've been saving that mail all
this time thinking I'd get around to deciphering it. Here's my swipe
at it
/ = beginning and end of "match" for awk (the statement that its trying to
match)
^ = match lines that *start* with whatever follows
[...] = match any of the characters inside the brackets
^ = negate the above, so _don't_ match the characters
D|+ = the list of characters to *not* match
so this /^[^D|+]/ will exclude any line that starts with 'D' (like the
first line of dpkg -l output, any line starting with '|' like the
column headings, any line starting with '+' like the big line that
underlines the headings.
Its turns dpkg -l output from :
Desired=Unknown/Install/Remove/Purge/Hold
|
Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err:
uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
un linux-image <none> (no description available)
un linux-image-2. <none> (no description available)
ii linux-image-2. 2.6.18+6 Linux kernel 2.6 image on AMD K7
ii linux-image-2. 2.6.17-5 Linux kernel 2.6.17 image on AMD K7
machines
ri linux-image-2. 2.6.17-9 Linux 2.6.17 image on AMD K7
ii linux-image-2. 2.6.18-3 Linux 2.6.18 image on AMD K7
ii linux-image-2. 2.6.18-8 Linux 2.6.18 image on AMD K7
ii linux-image-2. 2.6.18.dfsg.1- Linux 2.6.18 image on AMD K7
to
un linux-image <none>
un linux-image-2.6 <none>
ii linux-image-2.6-k7 2.6.18+6
ii linux-image-2.6.17-1-k7 2.6.17-5
ri linux-image-2.6.17-2-k7 2.6.17-9
ii linux-image-2.6.18-1-k7 2.6.18-3
ii linux-image-2.6.18-3-k7 2.6.18-8
ii linux-image-2.6.18-4-k7 2.6.18.dfsg.1-12
right?
Thanks for the nice explanation.
--
L.V.Gandhi
http://lvgandhi.tripod.com/
linux user No.205042
