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Full Discussion: Using sed to find text between a "string " and character ","
Top Forums Shell Programming and Scripting Using sed to find text between a "string " and character "," Post 302581662 by haggismn on Tuesday 13th of December 2011 09:51:57 PM
Old 12-13-2011
Thanks Maya_style and verdepollo.

Verdepollo's awk command nearly works. I have altered it slightly. I was not specific enough in that there are also commas throughout the file where they are not needed. This works, but I don't think it is optimal. The log file may sometimes be quite large and it is to be run on an embedded device. Can cpu time be reduced by finding away around the grep command? Thanks again


Code:
awk '{gsub(/,/,"\n");gsub(/string1/,"string2");}; {for(i=1;i<=NF-1;i+=3) {print ($(i),($(i+1)))}}' log |grep -m 3 string2

---------- Post updated at 09:51 PM ---------- Previous update was at 07:49 PM ----------

It seems as though I am having problems. I need to implement this as soft coded configuration, echo'ed into a script. When I do this I lose the quotation marks around "\n" and "string2". This was the main reason I initially preferred a sed command, as it may possibly avoid problems like this. Can anyone give advice on getting round this problem with quotations? To give an example
Code:
awk '{gsub(/,/,"\n");gsub(/string1/,"string2");}; {for(i=1;i<=NF-1;i+=3) {print ($(i),($(i+1)))}}' log |grep -m 3 string2

becomes
Code:
awk '{gsub(/,/,\n);gsub(/string1/,string2);}; {for(i=1;i<=NF-1;i+=3) {print ( $ (i),( $ (i+1)))}}' log |grep -m 3 string2

and is therefore not working any more.

Can I get around this or do I need to look more towards sed?

Thanks a million
 

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LEARN ABOUT V7

tr

TR(1)							      General Commands Manual							     TR(1)

NAME

       tr - translate characters

SYNOPSIS

       tr [ -cds ] [ string1 [ string2 ] ]

DESCRIPTION

       Tr  copies  the	standard  input  to  the  standard output with substitution or deletion of selected characters.  Input characters found in
       string1 are mapped into the corresponding characters of string2.  When string2 is short it is padded to the length of string1 by  duplicat-
       ing  its  last character.  Any combination of the options -cds may be used: -c complements the set of characters in string1 with respect to
       the universe of characters whose ASCII codes are 01 through 0377 octal; -d deletes all input characters in string1; -s squeezes all strings
       of repeated output characters that are in string2 to single characters.

       In either string the notation a-b means a range of characters from a to b in increasing ASCII order.  The character `' followed by 1, 2 or
       3 octal digits stands for the character whose ASCII code is given by those digits.  A `' followed by any other character stands  for  that
       character.

       The  following  example creates a list of all the words in `file1' one per line in `file2', where a word is taken to be a maximal string of
       alphabetics.  The second string is quoted to protect `' from the Shell.  012 is the ASCII code for newline.

	      tr -cs A-Za-z '12' <file1 >file2

SEE ALSO

       ed(1), ascii(7)

BUGS

       Won't handle ASCII NUL in string1 or string2; always deletes NUL from input.

																	     TR(1)
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