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Full Discussion: Parsing output
Top Forums Shell Programming and Scripting Parsing output Post 302225543 by shamrock on Friday 15th of August 2008 04:16:22 PM
Old 08-15-2008
Quote:
Originally Posted by lochraven
I'm trying to understand how the 'prev' is working or which portion of the statement actually is pointing to the previous line. Is that something built into awk?

Thanks again
The script has two parts to it...one part saves every line in the variable "prev"
Code:
1 {prev=$0}

The other part prints the previous "prev" and current "$0" lines if the logical AND of two conditions listed below is true.
Check whether the current line aka "$0" contains the keywords "DISK" and "External" AND (&&) if the previous line aka "prev" contains the keyword "USB"
Code:
/DISK .* External/ && tolower(prev) ~ /usb/ {printf("%s\n%s\n", prev, $0)}

 

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LEARN ABOUT DEBIAN

mic-livecd-iso-to-disk

MIC-LIVECD-ISO-TO-DISK(1)				      General Commands Manual					 MIC-LIVECD-ISO-TO-DISK(1)

NAME

       mic-livecd-iso-to-disk - Convert a livecd image to a live USB image then write to a USB disk or partition

SYNOPSIS

       mic-livecd-iso-to-disk [--reset-mbr] [--noverify] [--overlay-size-mb <size>] [--home-size-mb <size>] [--unencrypted-home] <isopath>
       [usbstick device]

       <isopath> is your livecd image path name, [usbstick device] is optional, if not provided, it will detect automatically and ask you to
       select.

DESCRIPTION

       mic-livecd-iso-to-disk can convert a livecd image to a live USB image and write it to a USB disk or partition, it is different from mic-
       image-writer which is just a safer dd with progress bar.

       mic-livecd-iso-to-disk can detect all the removable USB disks and let you select one of them, if you didn't insert any USB disk, it will
       ask you to insert until a USB disk is available, it can decide if your USB disk need to be formated and if your USB disk has an appropriate
       partition for this livecd image, all the operations are interactive and have warnings f they will damage your old data on your USB disk.

       mic-image-manager has a GUI tool for it.

OPTIONS

       --reset-mbr     Set MBR on your USB disk

       --noverify      Don't verify your livecd image

       --overlay-size-mb      Specify overlay size, the default size is 64 MB

       --home-size-mb	      Specify home size, the default is 0

EXAMPLES

       Write a Molib live image to your USB disk:

       mic-livecd-iso-to-disk your-2.1-final.img

EXIT STATUS

       mic-livecd-iso-to-disk returns  a  zero	exist  status  if it succeeds, otherwise return non-zero and print error message.

AUTHOR

       Yi Yang, Anas Nashif, Jianfeng Ding

SEE ALSO

       mic-image-creator(1), mic-convertor(1), mic-chroot(1), mic-image-writer(1), mic-image-manager(1)

perl v5.12.3							    2011-05-31						 MIC-LIVECD-ISO-TO-DISK(1)
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