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Full Discussion: sed behavior on hp-ux
Top Forums Shell Programming and Scripting sed behavior on hp-ux Post 302116524 by kahuna on Friday 4th of May 2007 04:26:04 PM
Old 05-04-2007
Quote:
Originally Posted by jim mcnamara
It just refuses to work on a file, regardless of whether it is stdin or not. That does not make sense.
Are you sure the file has only space and tab? Try
Code:
od -c file

also
Quote:
Originally Posted by jim mcnamara
echo $record | sed 's/^[ ]*//
Since $record is not in double quotes ("$record"), shell is parsing using white space and sed is not what is stripping the spaces.

Last edited by kahuna; 05-05-2007 at 08:48 AM.. Reason: Additional comment
 

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ppmtopgm(1)                                                   General Commands Manual                                                  ppmtopgm(1)

NAME
ppmtopgm - convert a portable pixmap into a portable graymap SYNOPSIS
ppmtopgm [ppmfile] DESCRIPTION
Reads a portable pixmap as input. Produces a portable graymap as output. The output is a "black and white" rendering of the original image, as in a black and white photograph. The quantization formula used is .299 r + .587 g + .114 b. Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any ppm program can read pgm (and pbm ) files automatically. pgmtoppm is for colorizing a pgm file. Also, see ppmtorgb3 for a different way of converting color to gray. And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate the original colors, not necessarily a way that looks like a black and white photograph. QUOTE
Cold-hearted orb that rules the night Removes the colors from our sight Red is gray, and yellow white But we decide which is right And which is a quantization error. SEE ALSO
pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5) AUTHOR
Copyright (C) 1989 by Jef Poskanzer. 10 April 2000 ppmtopgm(1)
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