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Shell Programming and Scripting
Grep a part of file based on string identifiers
Post 302783353 by vivek d r on Wednesday 20th of March 2013 10:19:13 AM
03-20-2013
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--
-- Table structure for table `Table11`
--
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consider the following is the contents of the file
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Delimiter $$
CREATE PROCEDURE hoop1(id int)
BEGIN
END
$$
Delimiter ;
.
.
.
.
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I was wondering if it was possible to grep a pattern based on the surround text. For example, if i have an input file like this:
titleA
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titlex
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cat fileanme.txt
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custom2=,
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here below is a part of the file
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Hi All,
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I have the file:
s3_T0(2) Pos "1" "2"
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---
0 0
1 0
0 1
1 1
---
1 2 "tau0"
1 2 "h10"
I want to patternmatch on ---
and get only the third part i.e.
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LEARN ABOUT LINUX
ppmtosixel
ppmtosixel(1) General Commands Manual ppmtosixel(1) NAME
ppmtosixel - convert a portable pixmap into DEC sixel format SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile] DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC LJ250 color inkjet printer. If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file. OPTIONS
-raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com- pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni- tude larger than a compressed file and prints much slower. -margin If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci- fied, a 1.5 inch left margin will offset the image. PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?. BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation. SEE ALSO
ppm(5) AUTHOR
Copyright (C) 1991 by Rick Vinci. 26 April 1991 ppmtosixel(1)