Am 05. Dec, 2007 schwätzte Nathan Aubrey so:
moin moin,
I need to replace some words with other words, but sometimes the words are not
present, so I need to add the words.
In a config file I use, it has the following field
KIDS :
Mother : Amanda
Father : Scott
$ ( newkid=anke; oldmom=Amanda; newmom=sabine; ( echo "KIDS :";
echo "Mother : Amanda" ) | sed -e "[EMAIL
PROTECTED](KIDS[[:space:]]*:\)[EMAIL PROTECTED]
$newkid@" -e "[EMAIL PROTECTED](Mother[[:space:]]*:[[:space:]]*\)[EMAIL
PROTECTED]@" )
KIDS : anke
Mother : sabine
$ ( newkid=anke; oldmom=Amanda; newmom=sabine; cat /tmp/Familie.txt | sed
-e "[EMAIL PROTECTED](KIDS[[:space:]]*:\)[EMAIL PROTECTED] $newkid@" -e
"[EMAIL PROTECTED](Mother[[:space:]]*:[[:space:]]*\)[EMAIL PROTECTED]@" ) KIDS
:
anke
Mother : sabine
Father : Scott
One recognizes lines without a name, the other lines with a name. The
pattern recognition that doesn't search for a name would also work when
there is a name.
$ ( newkid=anke; oldmom=Amanda; newmom=sabine; newdad=uwe; cat
/tmp/Familie.txt | sed -e "[EMAIL PROTECTED](KIDS[[:space:]]*:\)[EMAIL PROTECTED]
$newkid@" -e
"[EMAIL PROTECTED](Mother[[:space:]]*:[[:space:]]*\)[EMAIL PROTECTED]@" -e
"[EMAIL PROTECTED](Father[[:space:]]*:\)[EMAIL PROTECTED] $newdad@" )
KIDS : anke
Mother : sabine
Father : uwe
Lots of room to add error-checking.
It is easy to swap out the names of mother or father, as the variables are
there, but if I try to swap out a kids name and there is no kids name already
in place, how do I add it instead? Is it one command, or must I test if the
content is empty then add instead of replacing?
Multiple sed expressions, but you can toss them all on to one instance of
sed if you'd like.
The field example cannot change as it's just the format I use...
I appreciate any insite, sed is a great tool, but man! what a beast!
Learn the basics and then continue being amazed as you continue to learn
more basics... :)
ciao,
der.hans
--
# https://www.LuftHans.com/ http://www.CiscoLearning.org/
# A t-shirt a day keeps the noose away. - der.hans
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