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Full Discussion: Bash - Appending to specific line in file
Top Forums Shell Programming and Scripting Bash - Appending to specific line in file Post 302798037 by Don Cragun on Tuesday 23rd of April 2013 04:36:16 PM
Old 04-23-2013
I apologize. In my last posting, the awk program I supplied was missing a closing brace. I should have pasted it in the form I used when I tested it instead of converting it back to a 1-liner. Try the following awk script (but use /usr/xpg4/bin/awk, /usr/xpg6/bin/awk, or nawk instead of awk if you're using a Solaris/SunOS system):
Code:
awk -F"|" '
{       if($1==factor) {
                print $0 FS trial
                found=1
        } else print
}
END{    if(! found) print factor FS trial
}' factor="3,6" trial="YES,18,1.635" < file > file.new

And, no. Changing the field separator from "|" to ":" will not make any real difference. This script will add new trial results to the line in file that has the given factors (or add a new line if the given factors are not already in file); not replace existing trial results. It will never replace existing trial information when adding a new trial. You just need to move or copy file.new to file after each trial is successfully added.
 

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LEARN ABOUT V7

quiz

QUIZ(6) 							   Games Manual 							   QUIZ(6)

NAME

       quiz - test your knowledge

SYNOPSIS

       /usr/games/quiz [ -i file ] [ -t ] [ category1 category2 ]

DESCRIPTION

       Quiz gives associative knowledge tests on various subjects.  It asks items chosen from category1 and expects answers from category2.  If no
       categories are specified, quiz gives instructions and lists the available categories.

       Quiz tells a correct answer whenever you type a bare newline.  At the end of input, upon interrupt, or when questions run out, quiz reports
       a score and terminates.

       The -t flag specifies `tutorial' mode, where missed questions are repeated later, and material is gradually introduced as you learn.

       The -i flag causes the named file to be substituted for the default index file.	The lines of these files have the  syntax:

	   line      = category newline | category `:' line
	   category  = alternate | category `|' alternate
	   alternate = empty | alternate primary
	   primary   = character | `[' category `]' | option
	   option    = `{' category `}'

       The first category on each line of an index file names an information file.  The remaining categories specify the order and contents of the
       data in each line of the information file.  Information files have the same syntax.  Backslash `' is used as with sh(1) to quote syntacti-
       cally  significant  characters  or  to  insert  transparent newlines into a line.  When either a question or its answer is empty, quiz will
       refrain from asking it.

FILES

       /usr/games/quiz.k/*

BUGS

       The construct `a|ab' doesn't work in an information file.  Use `a{b}'.

																	   QUIZ(6)
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