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Full Discussion: sed substitute situation
Top Forums UNIX for Dummies Questions & Answers sed substitute situation Post 73677 by vgersh99 on Friday 3rd of June 2005 08:46:40 AM
Old 06-03-2005
Quote:
Originally Posted by newbreed1
I am having a problem executing a sed substitute in a file. I have tried alot of different things I found in previous posts, however non seem to work.
I want to substitute this in $FILE:
VALUE=33.4 for VALUE=44.0

In the script I have tried the following:
prev=$(awk -F"=" '{ print $2 }' $FILE )
new=$(echo "scale=1; 3.4 * 10" | bc )

sed 's/$prev/$new/g' $FILE > NEW_FILE
sed 's/"$prev"/"$new"/g' $FILE > NEW_FILE
sed "s/$prev/$new/g" $FILE > NEW_FILE
sed "s/"$prev"/"$new"/g" $FILE > NEW_FILE
sed s/"$prev"/"$new"/g $FILE > NEW_FILE
sed s/$prev/$new/g $FILE > NEW_FILE

In each one of these sed says s/ is garbled or it does not do the substitue. Can anyone see something I am missing? Thanks alot.

#3 should've worked.
post a couple of sample lines from $FILE [the ones with $prev], pls!
 

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LEARN ABOUT OSF1

prev

prev(1) 						      General Commands Manual							   prev(1)

NAME

       prev - show the previous message (only available within the message handling system, mh)

SYNOPSIS

       prev [+folder] [-[no]header] [-help] [-showproc program] [-noshowproc] [options to showproc]

OPTIONS

       Displays  a  one-line  header before the message. The header consists of the name of the folder and the message number. This is the default
       behavior. It can be suppressed with the -noheader option.  Prints a list of the valid options to this command.	Specifies  an  alternative
       program	to list messages. The default is to use the program defined by the showproc: entry in the file. As with show, you can give options
       to the showproc program at the command line. These are passed directly to showproc by prev.

       The defaults for this command are:

       +folder defaults to the current folder -header

DESCRIPTION

       The prev command displays the previous message in the current folder.  The previous message is the one before the current  message  in  the
       folder.	The message that is shown becomes the current message.

       You  can  specify  a  folder other than the current folder by using the +folder argument. If you specify a folder, that becomes the current
       folder.

RESTRICTIONS

       The prev command is really a link to the show program. As a result, if you make a link to prev and that link is not called prev, your  link
       will act like show instead. To avoid this, add a profile-entry for the link to your MH profile and add the argument prev to the entry.

PROFILE COMPONENTS

       Path: To determine your Mail directory

       showproc: Program to show the message

EXAMPLES

       The command in the following example displays the previous message in the folder +copylog: $ prev +copylog

FILES

       The user profile.

SEE ALSO

       show(1), next(1)

																	   prev(1)
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