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Top Forums Shell Programming and Scripting Sed script for appending & prepending Post 302683051 by sathyaac on Tuesday 7th of August 2012 06:51:01 AM
Old 08-07-2012
elixir,
still the same problem... when i run the script with the example u gave, it wipes the entire file and adds only the text to be appended.

the script i was trying to run earlier

Code:
prepend=$1
append=$2
file_name=$3

mv $file_name $file_name.bak
sed -e "s/^/$prepend/g" $file_name.bak > $file_name

sleep 2

sed 's/.*/&$append/g' $file_name > newname.txt

exit 0


Moderator's Comments:
Mod Comment Please use code tags next time for your code and data.

Last edited by zaxxon; 08-07-2012 at 07:57 AM.. Reason: code tags
 

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script(1)							   User Commands							 script(1)

NAME
script - make record of a terminal session SYNOPSIS
script [-a] [filename] DESCRIPTION
The script utility makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the record is saved in the file typescript. See WARNINGS. The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends when the forked shell exits or when Control-d is typed. OPTIONS
The following option is supported: -a Appends the session record to filename, rather than overwriting it. NOTES
script places everything that appears on the screen in filename, including prompts. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) WARNINGS
script can pose a security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a privileged user, that is, root. Be sure that typescript is not a link before running script. SunOS 5.11 30 Jan 2004 script(1)
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