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Shell Programming and Scripting

file format....

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# 8  
Old 07-01-2005
Quote:
Originally Posted by vino
Could you explain your sed script, please ?

Thanks,
vino
Code:
sed "$!N;s/\n/$(/bin/echo '\t')/" inputFile

from 'man sed'
Code:
N                Append the next line of input to
                 the pattern space with an embed-
                 ded new-line.  (The current line
                 number  changes.)   If  no  next
                 line of input is available,  the
                 N  command  verb shall branch to
                 the end of the script  and  quit
                 without starting a new cycle and
                 without  writing   the   pattern
                 space.

!command     |  Don't.  Apply  the  command  (or|
             |  group,  if command is {) only to|
             |  lines  not   selected   by   the|
             |  address(es).                    | 

$                 Last line

Having said that.....

'$!N' translates into except for the last line append the Next line to the pattern space with the embedded newline.

Having the 'embedded new line' in the pattern space, next command [s/\n/$(/bin/echo '\t')] substitutes new line '\n' with a TAB character. The tab character is produced by active function using 'echo' - '$(/bin/echo .....)'.
# 9  
Old 07-04-2005
Error : using Sed
the following error has occured while using Sed command:


root@Billtest # sed "$!N;s/\n/$(/bin/echo '\t')/" om
sed: command garbled: N;s/\n/$(/bin/echo '\t')/

Please Advise!!!
# 10  
Old 07-04-2005
Works fine on Solaris with stock 'sed' under ksh.
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