AIX-Need to add lines after identifying the Pattern in the file using Non-GNU - Sed

Question

I have the following file:

export TMOUT

PS1="$(hostname):${LOGNAME}:\${PWD} ${PROMPT} "
PS1="${FGOLD}$(hostname):${LOGNAME}:\${PWD} ${PROMPT} ${NORMAL}"  
PS1=abd  
PS1="$(hostname):$LOGNAME:\$PWD $PROMPT "  
export PS1 LANG

I need to add the line below under the line matching export TMOUT:

FGOLD=`echo "\033[1;32m"`

So, the final output should look like this:

export TMOUT  
FGOLD=`echo "\033[1;32m"`    

PS1="$(hostname):${LOGNAME}:\${PWD} ${PROMPT} "
PS1="${FGOLD}$(hostname):${LOGNAME}:\${PWD} ${PROMPT} ${NORMAL}"  
PS1=abd  
PS1="$(hostname):$LOGNAME:\$PWD $PROMPT "  
export PS1 LANG

The command below is not working:

sed 's/.*export.*\TMOUT./&\FGOLD=`echo "\033[1;32m"`/' pro

outputs:

export TMOUT  

PS1="$(hostname):${LOGNAME}:\${PWD} ${PROMPT} "
PS1="${FGOLD}$(hostname):${LOGNAME}:\${PWD} ${PROMPT} ${NORMAL}"
PS1=abd
PS1="$(hostname):$LOGNAME:\$PWD $PROMPT "
export PS1 LANG

Can you edit this and start out with a question or explanation on what you're trying to do? — Brandin, Sep 19 '15 at 10:01
Right now it just looks like a code dump and I'm really not feeling like reading into it. Start out with at least a few sentences explaining what you're doing in a conversational way like "I'm trying to X and Y and I tried Z but have this problem P... " etc. THEN put your code dump so that we can have context. — Brandin, Sep 19 '15 at 10:25

fd0 · Answer 1 · 2015-09-19T15:34:15.730

1

With any sed:

sed '/export TMOUT/ a\
FGOLD=`echo "\\033[1;32m"`' file

or place the string in a variable

myvar='FGOLD=`echo "\\033[1;32m"`'
sed '/export TMOUT/ a\
'"$myvar"'' file

edited Sep 19 '15 at 15:34

answered Sep 19 '15 at 11:48

fd0

1,449

@Sivas Ya, you could use ansi-c quoting. It looks ugly;) sed $'/export TMOUT/ a \\\n '"$myvar"'' file – fd0 Sep 19 '15 at 12:06
sorry @fd0 "sed: 0602-404 Function /export TMOUT/ a \\n "$myvar" cannot be parsed." – Sivas Sep 19 '15 at 12:16
both answers works good ! Thanks fd0 & Terdon – Sivas Sep 19 '15 at 13:30

terdon · Accepted Answer · 2015-09-19T12:26:03.003

You are escaping the T of TMOUT:

sed 's/.*export.*\TMOUT./&\FGOLD=`echo "\033[1;32m"`/' pro
                 ^
                 |-----??

That shouldn't make much difference but it's pointless. Then, you are also matching a character after TMOUT but your file has none (sed won't match the final newline). Try this instead:

sed 's/export TMOUT./&\nFGOLD=`echo "\\033[1;32m"`/' file

I don't have a non-GNU sed to test this on and I'm not sure if the \n will work in the replacement. If that doesn't work, try adding a \ and then pressing Enter to get the newline:

sed 's/export TMOUT/&\    ## hit enter and continue writing on a new line
FGOLD=`echo "\\033[1;32m"`/' file

So, other options are:

perl -pe 's/export TMOUT/$&\nFGOLD=\`echo "\\033[1;32m"\`/' file

Or awk:

awk '{
        if(/export TMOUT/){a=1}
        {
            print;
            if(a==1){
                print "FGOLD=`echo \"\\033[1;32m\"`";
                a=0
        }}}' file

still the same output.. using the Sed... perl works good @terdon any suggestion for the sed ? — Sivas, Sep 19 '15 at 11:49
@Sivas see updated answer. Or, just use one of the other options I gave. — terdon, Sep 19 '15 at 12:26

AIX-Need to add lines after identifying the Pattern in the file using Non-GNU - Sed

2 Answers2