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Shell Programming and Scripting
Perl script solution
Post 302422024 by webhope on Monday 17th of May 2010 09:58:19 AM
05-17-2010
that was mistake:
not print x NFR
but
print x
I gave you simplified form of code.
I must to explain you what I want to do.
Originally. I had something like ... kernel (hd0,2) ... root=(hd0,2) .... I replaced it with ...
It is not ideal but what I do in previous code is that I replace (hd?,?) for uuid and uuid for (hd?,?)
My code was:
Original input text was like:
Includes \n twice fot newline character.
See:
I tried your code, but it result in:
---------- Post updated at 03:58 PM ---------- Previous update was at 03:30 PM ----------
What I want to do:
The 1st found result from (..|..) to give on separete line with uuid:
change this:
to this:
It is important to specify we look for kernel or initrd. "initrd (UUID=... " or "kernel (UUID=..." .
Because there also can occur words like "unhide (UUID=" or "hide (UUID=" or similar.
not print x NFR
but
print x
I gave you simplified form of code.
Quote:
Why must it be awk?
---------- Post updated at 02:37 PM ---------- Previous update was at 02:25 PM ----------
---------- Post updated at 02:37 PM ---------- Previous update was at 02:25 PM ----------
Code:
$> cat infile
title Sata Mandriva
kernel /boot/vmlinuz
initrd /boot/initrd.img
$> echo "$block"| awk '/(kernel|initrd)/ && f!=1 {sub(/ /,"XXX"); f=1; print; next}1' f=0
title Sata Mandriva
kernelXXX/boot/vmlinuz
initrd /boot/initrd.imgOriginally. I had something like ... kernel (hd0,2) ... root=(hd0,2) .... I replaced it with ...
Code:
kernel (UUID=theuuid) ... root=(UUID=theuuid) initrd (UUID=theuuid)
My code was:
Code:
block=$( echo "$block" | awk '{ x=gensub(/(kernel|init)( +)\(UUID=[-0-9a-f]*\)/,"uuid '$two'\\\\n\\1 ","g"); print x}' );Code:
title Sata Mandriva\nkernel (UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c)/boot/vmlinuz BOOT_IMAGE=linux root=(UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c) resume=(UUID=e12487ff-6d6f-44c4-9e03-33f545b3b798) splash=silent vga=788 uuid UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c\ninitrd /boot/initrd.img
See:
Code:
\nkernel (UUID= \ninitrd /boot/initrd.img
Code:
titleXXXSata Mandriva kernel (UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c)/boot/vmlinuz BOOT_IMAGE=linux root=(UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c) resume=(UUID=e12487ff-6d6f-44c4-9e03-33f545b3b798) splash=silent vga=788 uuid UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c\ninitrd /boot/initrd.img
---------- Post updated at 03:58 PM ---------- Previous update was at 03:30 PM ----------
What I want to do:
The 1st found result from (..|..) to give on separete line with uuid:
change this:
Code:
kernel (UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c) /boot ... initrd (UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c) /boot
Code:
uuid UUID=eab515e9-bc3e-4024-9f01-55fddaa0fb1c kernel /boot... initrd /boot...
Because there also can occur words like "unhide (UUID=" or "hide (UUID=" or similar.
Last edited by webhope; 05-17-2010 at 11:08 AM..
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